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Message-Id: <20210120171745.1657762-2-jthierry@redhat.com>
Date: Wed, 20 Jan 2021 18:17:41 +0100
From: Julien Thierry <jthierry@...hat.com>
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: catalin.marinas@....com, will@...nel.org, mark.rutland@....com,
broonie@...nel.org, Julien Thierry <jthierry@...hat.com>
Subject: [RFC PATCH 1/5] arm64: Move instruction encoder/decoder under lib/
Aarch64 instruction set encoding and decoding logic can prove useful
for some features/tools both part of the kernel and outside the kernel.
Isolate the function dealing only with encoding/decoding instructions,
with minimal dependency on kernel utilities in order to be able to reuse
that code.
Code was only moved, no code should have been added, removed nor
modifier.
Signed-off-by: Julien Thierry <jthierry@...hat.com>
---
arch/arm64/include/asm/aarch64-insn.h | 505 +++++++
arch/arm64/include/asm/alternative-macros.h | 3 -
arch/arm64/include/asm/alternative.h | 1 +
arch/arm64/include/asm/debug-monitors.h | 14 +-
arch/arm64/include/asm/ftrace.h | 2 +-
arch/arm64/include/asm/insn.h | 476 -------
arch/arm64/include/asm/jump_label.h | 2 +-
arch/arm64/include/asm/uprobes.h | 2 +-
arch/arm64/kernel/insn.c | 1416 +-----------------
arch/arm64/lib/Makefile | 2 +-
arch/arm64/lib/aarch64-insn.c | 1426 +++++++++++++++++++
11 files changed, 1938 insertions(+), 1911 deletions(-)
create mode 100644 arch/arm64/include/asm/aarch64-insn.h
create mode 100644 arch/arm64/lib/aarch64-insn.c
diff --git a/arch/arm64/include/asm/aarch64-insn.h b/arch/arm64/include/asm/aarch64-insn.h
new file mode 100644
index 000000000000..cead3be1a2d0
--- /dev/null
+++ b/arch/arm64/include/asm/aarch64-insn.h
@@ -0,0 +1,505 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef __ASM_AARCH64_INSN_H
+#define __ASM_AARCH64_INSN_H
+
+#include <linux/build_bug.h>
+#include <linux/types.h>
+
+#include <asm/brk-imm.h>
+
+/* A64 instructions are always 32 bits. */
+#define AARCH64_INSN_SIZE 4
+
+/*
+ * BRK instruction encoding
+ * The #imm16 value should be placed at bits[20:5] within BRK ins
+ */
+#define AARCH64_BREAK_MON 0xd4200000
+
+/*
+ * BRK instruction for provoking a fault on purpose
+ * Unlike kgdb, #imm16 value with unallocated handler is used for faulting.
+ */
+#define AARCH64_BREAK_FAULT (AARCH64_BREAK_MON | (FAULT_BRK_IMM << 5))
+
+#ifndef __ASSEMBLY__
+/*
+ * ARM Architecture Reference Manual for ARMv8 Profile-A, Issue A.a
+ * Section C3.1 "A64 instruction index by encoding":
+ * AArch64 main encoding table
+ * Bit position
+ * 28 27 26 25 Encoding Group
+ * 0 0 - - Unallocated
+ * 1 0 0 - Data processing, immediate
+ * 1 0 1 - Branch, exception generation and system instructions
+ * - 1 - 0 Loads and stores
+ * - 1 0 1 Data processing - register
+ * 0 1 1 1 Data processing - SIMD and floating point
+ * 1 1 1 1 Data processing - SIMD and floating point
+ * "-" means "don't care"
+ */
+enum aarch64_insn_encoding_class {
+ AARCH64_INSN_CLS_UNKNOWN, /* UNALLOCATED */
+ AARCH64_INSN_CLS_DP_IMM, /* Data processing - immediate */
+ AARCH64_INSN_CLS_DP_REG, /* Data processing - register */
+ AARCH64_INSN_CLS_DP_FPSIMD, /* Data processing - SIMD and FP */
+ AARCH64_INSN_CLS_LDST, /* Loads and stores */
+ AARCH64_INSN_CLS_BR_SYS, /* Branch, exception generation and
+ * system instructions */
+};
+
+enum aarch64_insn_hint_cr_op {
+ AARCH64_INSN_HINT_NOP = 0x0 << 5,
+ AARCH64_INSN_HINT_YIELD = 0x1 << 5,
+ AARCH64_INSN_HINT_WFE = 0x2 << 5,
+ AARCH64_INSN_HINT_WFI = 0x3 << 5,
+ AARCH64_INSN_HINT_SEV = 0x4 << 5,
+ AARCH64_INSN_HINT_SEVL = 0x5 << 5,
+
+ AARCH64_INSN_HINT_XPACLRI = 0x07 << 5,
+ AARCH64_INSN_HINT_PACIA_1716 = 0x08 << 5,
+ AARCH64_INSN_HINT_PACIB_1716 = 0x0A << 5,
+ AARCH64_INSN_HINT_AUTIA_1716 = 0x0C << 5,
+ AARCH64_INSN_HINT_AUTIB_1716 = 0x0E << 5,
+ AARCH64_INSN_HINT_PACIAZ = 0x18 << 5,
+ AARCH64_INSN_HINT_PACIASP = 0x19 << 5,
+ AARCH64_INSN_HINT_PACIBZ = 0x1A << 5,
+ AARCH64_INSN_HINT_PACIBSP = 0x1B << 5,
+ AARCH64_INSN_HINT_AUTIAZ = 0x1C << 5,
+ AARCH64_INSN_HINT_AUTIASP = 0x1D << 5,
+ AARCH64_INSN_HINT_AUTIBZ = 0x1E << 5,
+ AARCH64_INSN_HINT_AUTIBSP = 0x1F << 5,
+
+ AARCH64_INSN_HINT_ESB = 0x10 << 5,
+ AARCH64_INSN_HINT_PSB = 0x11 << 5,
+ AARCH64_INSN_HINT_TSB = 0x12 << 5,
+ AARCH64_INSN_HINT_CSDB = 0x14 << 5,
+
+ AARCH64_INSN_HINT_BTI = 0x20 << 5,
+ AARCH64_INSN_HINT_BTIC = 0x22 << 5,
+ AARCH64_INSN_HINT_BTIJ = 0x24 << 5,
+ AARCH64_INSN_HINT_BTIJC = 0x26 << 5,
+};
+
+enum aarch64_insn_imm_type {
+ AARCH64_INSN_IMM_ADR,
+ AARCH64_INSN_IMM_26,
+ AARCH64_INSN_IMM_19,
+ AARCH64_INSN_IMM_16,
+ AARCH64_INSN_IMM_14,
+ AARCH64_INSN_IMM_12,
+ AARCH64_INSN_IMM_9,
+ AARCH64_INSN_IMM_7,
+ AARCH64_INSN_IMM_6,
+ AARCH64_INSN_IMM_S,
+ AARCH64_INSN_IMM_R,
+ AARCH64_INSN_IMM_N,
+ AARCH64_INSN_IMM_MAX
+};
+
+enum aarch64_insn_register_type {
+ AARCH64_INSN_REGTYPE_RT,
+ AARCH64_INSN_REGTYPE_RN,
+ AARCH64_INSN_REGTYPE_RT2,
+ AARCH64_INSN_REGTYPE_RM,
+ AARCH64_INSN_REGTYPE_RD,
+ AARCH64_INSN_REGTYPE_RA,
+ AARCH64_INSN_REGTYPE_RS,
+};
+
+enum aarch64_insn_register {
+ AARCH64_INSN_REG_0 = 0,
+ AARCH64_INSN_REG_1 = 1,
+ AARCH64_INSN_REG_2 = 2,
+ AARCH64_INSN_REG_3 = 3,
+ AARCH64_INSN_REG_4 = 4,
+ AARCH64_INSN_REG_5 = 5,
+ AARCH64_INSN_REG_6 = 6,
+ AARCH64_INSN_REG_7 = 7,
+ AARCH64_INSN_REG_8 = 8,
+ AARCH64_INSN_REG_9 = 9,
+ AARCH64_INSN_REG_10 = 10,
+ AARCH64_INSN_REG_11 = 11,
+ AARCH64_INSN_REG_12 = 12,
+ AARCH64_INSN_REG_13 = 13,
+ AARCH64_INSN_REG_14 = 14,
+ AARCH64_INSN_REG_15 = 15,
+ AARCH64_INSN_REG_16 = 16,
+ AARCH64_INSN_REG_17 = 17,
+ AARCH64_INSN_REG_18 = 18,
+ AARCH64_INSN_REG_19 = 19,
+ AARCH64_INSN_REG_20 = 20,
+ AARCH64_INSN_REG_21 = 21,
+ AARCH64_INSN_REG_22 = 22,
+ AARCH64_INSN_REG_23 = 23,
+ AARCH64_INSN_REG_24 = 24,
+ AARCH64_INSN_REG_25 = 25,
+ AARCH64_INSN_REG_26 = 26,
+ AARCH64_INSN_REG_27 = 27,
+ AARCH64_INSN_REG_28 = 28,
+ AARCH64_INSN_REG_29 = 29,
+ AARCH64_INSN_REG_FP = 29, /* Frame pointer */
+ AARCH64_INSN_REG_30 = 30,
+ AARCH64_INSN_REG_LR = 30, /* Link register */
+ AARCH64_INSN_REG_ZR = 31, /* Zero: as source register */
+ AARCH64_INSN_REG_SP = 31 /* Stack pointer: as load/store base reg */
+};
+
+enum aarch64_insn_special_register {
+ AARCH64_INSN_SPCLREG_SPSR_EL1 = 0xC200,
+ AARCH64_INSN_SPCLREG_ELR_EL1 = 0xC201,
+ AARCH64_INSN_SPCLREG_SP_EL0 = 0xC208,
+ AARCH64_INSN_SPCLREG_SPSEL = 0xC210,
+ AARCH64_INSN_SPCLREG_CURRENTEL = 0xC212,
+ AARCH64_INSN_SPCLREG_DAIF = 0xDA11,
+ AARCH64_INSN_SPCLREG_NZCV = 0xDA10,
+ AARCH64_INSN_SPCLREG_FPCR = 0xDA20,
+ AARCH64_INSN_SPCLREG_DSPSR_EL0 = 0xDA28,
+ AARCH64_INSN_SPCLREG_DLR_EL0 = 0xDA29,
+ AARCH64_INSN_SPCLREG_SPSR_EL2 = 0xE200,
+ AARCH64_INSN_SPCLREG_ELR_EL2 = 0xE201,
+ AARCH64_INSN_SPCLREG_SP_EL1 = 0xE208,
+ AARCH64_INSN_SPCLREG_SPSR_INQ = 0xE218,
+ AARCH64_INSN_SPCLREG_SPSR_ABT = 0xE219,
+ AARCH64_INSN_SPCLREG_SPSR_UND = 0xE21A,
+ AARCH64_INSN_SPCLREG_SPSR_FIQ = 0xE21B,
+ AARCH64_INSN_SPCLREG_SPSR_EL3 = 0xF200,
+ AARCH64_INSN_SPCLREG_ELR_EL3 = 0xF201,
+ AARCH64_INSN_SPCLREG_SP_EL2 = 0xF210
+};
+
+enum aarch64_insn_variant {
+ AARCH64_INSN_VARIANT_32BIT,
+ AARCH64_INSN_VARIANT_64BIT
+};
+
+enum aarch64_insn_condition {
+ AARCH64_INSN_COND_EQ = 0x0, /* == */
+ AARCH64_INSN_COND_NE = 0x1, /* != */
+ AARCH64_INSN_COND_CS = 0x2, /* unsigned >= */
+ AARCH64_INSN_COND_CC = 0x3, /* unsigned < */
+ AARCH64_INSN_COND_MI = 0x4, /* < 0 */
+ AARCH64_INSN_COND_PL = 0x5, /* >= 0 */
+ AARCH64_INSN_COND_VS = 0x6, /* overflow */
+ AARCH64_INSN_COND_VC = 0x7, /* no overflow */
+ AARCH64_INSN_COND_HI = 0x8, /* unsigned > */
+ AARCH64_INSN_COND_LS = 0x9, /* unsigned <= */
+ AARCH64_INSN_COND_GE = 0xa, /* signed >= */
+ AARCH64_INSN_COND_LT = 0xb, /* signed < */
+ AARCH64_INSN_COND_GT = 0xc, /* signed > */
+ AARCH64_INSN_COND_LE = 0xd, /* signed <= */
+ AARCH64_INSN_COND_AL = 0xe, /* always */
+};
+
+enum aarch64_insn_branch_type {
+ AARCH64_INSN_BRANCH_NOLINK,
+ AARCH64_INSN_BRANCH_LINK,
+ AARCH64_INSN_BRANCH_RETURN,
+ AARCH64_INSN_BRANCH_COMP_ZERO,
+ AARCH64_INSN_BRANCH_COMP_NONZERO,
+};
+
+enum aarch64_insn_size_type {
+ AARCH64_INSN_SIZE_8,
+ AARCH64_INSN_SIZE_16,
+ AARCH64_INSN_SIZE_32,
+ AARCH64_INSN_SIZE_64,
+};
+
+enum aarch64_insn_ldst_type {
+ AARCH64_INSN_LDST_LOAD_REG_OFFSET,
+ AARCH64_INSN_LDST_STORE_REG_OFFSET,
+ AARCH64_INSN_LDST_LOAD_PAIR_PRE_INDEX,
+ AARCH64_INSN_LDST_STORE_PAIR_PRE_INDEX,
+ AARCH64_INSN_LDST_LOAD_PAIR_POST_INDEX,
+ AARCH64_INSN_LDST_STORE_PAIR_POST_INDEX,
+ AARCH64_INSN_LDST_LOAD_EX,
+ AARCH64_INSN_LDST_STORE_EX,
+};
+
+enum aarch64_insn_adsb_type {
+ AARCH64_INSN_ADSB_ADD,
+ AARCH64_INSN_ADSB_SUB,
+ AARCH64_INSN_ADSB_ADD_SETFLAGS,
+ AARCH64_INSN_ADSB_SUB_SETFLAGS
+};
+
+enum aarch64_insn_movewide_type {
+ AARCH64_INSN_MOVEWIDE_ZERO,
+ AARCH64_INSN_MOVEWIDE_KEEP,
+ AARCH64_INSN_MOVEWIDE_INVERSE
+};
+
+enum aarch64_insn_bitfield_type {
+ AARCH64_INSN_BITFIELD_MOVE,
+ AARCH64_INSN_BITFIELD_MOVE_UNSIGNED,
+ AARCH64_INSN_BITFIELD_MOVE_SIGNED
+};
+
+enum aarch64_insn_data1_type {
+ AARCH64_INSN_DATA1_REVERSE_16,
+ AARCH64_INSN_DATA1_REVERSE_32,
+ AARCH64_INSN_DATA1_REVERSE_64,
+};
+
+enum aarch64_insn_data2_type {
+ AARCH64_INSN_DATA2_UDIV,
+ AARCH64_INSN_DATA2_SDIV,
+ AARCH64_INSN_DATA2_LSLV,
+ AARCH64_INSN_DATA2_LSRV,
+ AARCH64_INSN_DATA2_ASRV,
+ AARCH64_INSN_DATA2_RORV,
+};
+
+enum aarch64_insn_data3_type {
+ AARCH64_INSN_DATA3_MADD,
+ AARCH64_INSN_DATA3_MSUB,
+};
+
+enum aarch64_insn_logic_type {
+ AARCH64_INSN_LOGIC_AND,
+ AARCH64_INSN_LOGIC_BIC,
+ AARCH64_INSN_LOGIC_ORR,
+ AARCH64_INSN_LOGIC_ORN,
+ AARCH64_INSN_LOGIC_EOR,
+ AARCH64_INSN_LOGIC_EON,
+ AARCH64_INSN_LOGIC_AND_SETFLAGS,
+ AARCH64_INSN_LOGIC_BIC_SETFLAGS
+};
+
+enum aarch64_insn_prfm_type {
+ AARCH64_INSN_PRFM_TYPE_PLD,
+ AARCH64_INSN_PRFM_TYPE_PLI,
+ AARCH64_INSN_PRFM_TYPE_PST,
+};
+
+enum aarch64_insn_prfm_target {
+ AARCH64_INSN_PRFM_TARGET_L1,
+ AARCH64_INSN_PRFM_TARGET_L2,
+ AARCH64_INSN_PRFM_TARGET_L3,
+};
+
+enum aarch64_insn_prfm_policy {
+ AARCH64_INSN_PRFM_POLICY_KEEP,
+ AARCH64_INSN_PRFM_POLICY_STRM,
+};
+
+enum aarch64_insn_adr_type {
+ AARCH64_INSN_ADR_TYPE_ADRP,
+ AARCH64_INSN_ADR_TYPE_ADR,
+};
+
+#define __AARCH64_INSN_FUNCS(abbr, mask, val) \
+static __always_inline bool aarch64_insn_is_##abbr(u32 code) \
+{ \
+ BUILD_BUG_ON(~(mask) & (val)); \
+ return (code & (mask)) == (val); \
+} \
+static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \
+{ \
+ return (val); \
+}
+
+__AARCH64_INSN_FUNCS(adr, 0x9F000000, 0x10000000)
+__AARCH64_INSN_FUNCS(adrp, 0x9F000000, 0x90000000)
+__AARCH64_INSN_FUNCS(prfm, 0x3FC00000, 0x39800000)
+__AARCH64_INSN_FUNCS(prfm_lit, 0xFF000000, 0xD8000000)
+__AARCH64_INSN_FUNCS(str_reg, 0x3FE0EC00, 0x38206800)
+__AARCH64_INSN_FUNCS(ldadd, 0x3F20FC00, 0x38200000)
+__AARCH64_INSN_FUNCS(ldr_reg, 0x3FE0EC00, 0x38606800)
+__AARCH64_INSN_FUNCS(ldr_lit, 0xBF000000, 0x18000000)
+__AARCH64_INSN_FUNCS(ldrsw_lit, 0xFF000000, 0x98000000)
+__AARCH64_INSN_FUNCS(exclusive, 0x3F800000, 0x08000000)
+__AARCH64_INSN_FUNCS(load_ex, 0x3F400000, 0x08400000)
+__AARCH64_INSN_FUNCS(store_ex, 0x3F400000, 0x08000000)
+__AARCH64_INSN_FUNCS(stp_post, 0x7FC00000, 0x28800000)
+__AARCH64_INSN_FUNCS(ldp_post, 0x7FC00000, 0x28C00000)
+__AARCH64_INSN_FUNCS(stp_pre, 0x7FC00000, 0x29800000)
+__AARCH64_INSN_FUNCS(ldp_pre, 0x7FC00000, 0x29C00000)
+__AARCH64_INSN_FUNCS(add_imm, 0x7F000000, 0x11000000)
+__AARCH64_INSN_FUNCS(adds_imm, 0x7F000000, 0x31000000)
+__AARCH64_INSN_FUNCS(sub_imm, 0x7F000000, 0x51000000)
+__AARCH64_INSN_FUNCS(subs_imm, 0x7F000000, 0x71000000)
+__AARCH64_INSN_FUNCS(movn, 0x7F800000, 0x12800000)
+__AARCH64_INSN_FUNCS(sbfm, 0x7F800000, 0x13000000)
+__AARCH64_INSN_FUNCS(bfm, 0x7F800000, 0x33000000)
+__AARCH64_INSN_FUNCS(movz, 0x7F800000, 0x52800000)
+__AARCH64_INSN_FUNCS(ubfm, 0x7F800000, 0x53000000)
+__AARCH64_INSN_FUNCS(movk, 0x7F800000, 0x72800000)
+__AARCH64_INSN_FUNCS(add, 0x7F200000, 0x0B000000)
+__AARCH64_INSN_FUNCS(adds, 0x7F200000, 0x2B000000)
+__AARCH64_INSN_FUNCS(sub, 0x7F200000, 0x4B000000)
+__AARCH64_INSN_FUNCS(subs, 0x7F200000, 0x6B000000)
+__AARCH64_INSN_FUNCS(madd, 0x7FE08000, 0x1B000000)
+__AARCH64_INSN_FUNCS(msub, 0x7FE08000, 0x1B008000)
+__AARCH64_INSN_FUNCS(udiv, 0x7FE0FC00, 0x1AC00800)
+__AARCH64_INSN_FUNCS(sdiv, 0x7FE0FC00, 0x1AC00C00)
+__AARCH64_INSN_FUNCS(lslv, 0x7FE0FC00, 0x1AC02000)
+__AARCH64_INSN_FUNCS(lsrv, 0x7FE0FC00, 0x1AC02400)
+__AARCH64_INSN_FUNCS(asrv, 0x7FE0FC00, 0x1AC02800)
+__AARCH64_INSN_FUNCS(rorv, 0x7FE0FC00, 0x1AC02C00)
+__AARCH64_INSN_FUNCS(rev16, 0x7FFFFC00, 0x5AC00400)
+__AARCH64_INSN_FUNCS(rev32, 0x7FFFFC00, 0x5AC00800)
+__AARCH64_INSN_FUNCS(rev64, 0x7FFFFC00, 0x5AC00C00)
+__AARCH64_INSN_FUNCS(and, 0x7F200000, 0x0A000000)
+__AARCH64_INSN_FUNCS(bic, 0x7F200000, 0x0A200000)
+__AARCH64_INSN_FUNCS(orr, 0x7F200000, 0x2A000000)
+__AARCH64_INSN_FUNCS(orn, 0x7F200000, 0x2A200000)
+__AARCH64_INSN_FUNCS(eor, 0x7F200000, 0x4A000000)
+__AARCH64_INSN_FUNCS(eon, 0x7F200000, 0x4A200000)
+__AARCH64_INSN_FUNCS(ands, 0x7F200000, 0x6A000000)
+__AARCH64_INSN_FUNCS(bics, 0x7F200000, 0x6A200000)
+__AARCH64_INSN_FUNCS(and_imm, 0x7F800000, 0x12000000)
+__AARCH64_INSN_FUNCS(orr_imm, 0x7F800000, 0x32000000)
+__AARCH64_INSN_FUNCS(eor_imm, 0x7F800000, 0x52000000)
+__AARCH64_INSN_FUNCS(ands_imm, 0x7F800000, 0x72000000)
+__AARCH64_INSN_FUNCS(extr, 0x7FA00000, 0x13800000)
+__AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000)
+__AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000)
+__AARCH64_INSN_FUNCS(cbz, 0x7F000000, 0x34000000)
+__AARCH64_INSN_FUNCS(cbnz, 0x7F000000, 0x35000000)
+__AARCH64_INSN_FUNCS(tbz, 0x7F000000, 0x36000000)
+__AARCH64_INSN_FUNCS(tbnz, 0x7F000000, 0x37000000)
+__AARCH64_INSN_FUNCS(bcond, 0xFF000010, 0x54000000)
+__AARCH64_INSN_FUNCS(svc, 0xFFE0001F, 0xD4000001)
+__AARCH64_INSN_FUNCS(hvc, 0xFFE0001F, 0xD4000002)
+__AARCH64_INSN_FUNCS(smc, 0xFFE0001F, 0xD4000003)
+__AARCH64_INSN_FUNCS(brk, 0xFFE0001F, 0xD4200000)
+__AARCH64_INSN_FUNCS(exception, 0xFF000000, 0xD4000000)
+__AARCH64_INSN_FUNCS(hint, 0xFFFFF01F, 0xD503201F)
+__AARCH64_INSN_FUNCS(br, 0xFFFFFC1F, 0xD61F0000)
+__AARCH64_INSN_FUNCS(br_auth, 0xFEFFF800, 0xD61F0800)
+__AARCH64_INSN_FUNCS(blr, 0xFFFFFC1F, 0xD63F0000)
+__AARCH64_INSN_FUNCS(blr_auth, 0xFEFFF800, 0xD63F0800)
+__AARCH64_INSN_FUNCS(ret, 0xFFFFFC1F, 0xD65F0000)
+__AARCH64_INSN_FUNCS(ret_auth, 0xFFFFFBFF, 0xD65F0BFF)
+__AARCH64_INSN_FUNCS(eret, 0xFFFFFFFF, 0xD69F03E0)
+__AARCH64_INSN_FUNCS(eret_auth, 0xFFFFFBFF, 0xD69F0BFF)
+__AARCH64_INSN_FUNCS(mrs, 0xFFF00000, 0xD5300000)
+__AARCH64_INSN_FUNCS(msr_imm, 0xFFF8F01F, 0xD500401F)
+__AARCH64_INSN_FUNCS(msr_reg, 0xFFF00000, 0xD5100000)
+
+#undef __AARCH64_INSN_FUNCS
+
+bool aarch64_insn_is_steppable_hint(u32 insn);
+bool aarch64_insn_is_branch_imm(u32 insn);
+
+static inline bool aarch64_insn_is_adr_adrp(u32 insn)
+{
+ return aarch64_insn_is_adr(insn) || aarch64_insn_is_adrp(insn);
+}
+
+enum aarch64_insn_encoding_class aarch64_get_insn_class(u32 insn);
+bool aarch64_insn_uses_literal(u32 insn);
+bool aarch64_insn_is_branch(u32 insn);
+u64 aarch64_insn_decode_immediate(enum aarch64_insn_imm_type type, u32 insn);
+u32 aarch64_insn_encode_immediate(enum aarch64_insn_imm_type type,
+ u32 insn, u64 imm);
+u32 aarch64_insn_decode_register(enum aarch64_insn_register_type type,
+ u32 insn);
+u32 aarch64_insn_gen_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_branch_type type);
+u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_branch_type type);
+u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_condition cond);
+u32 aarch64_insn_gen_hint(enum aarch64_insn_hint_cr_op op);
+u32 aarch64_insn_gen_nop(void);
+u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg,
+ enum aarch64_insn_branch_type type);
+u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg,
+ enum aarch64_insn_register base,
+ enum aarch64_insn_register offset,
+ enum aarch64_insn_size_type size,
+ enum aarch64_insn_ldst_type type);
+u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
+ enum aarch64_insn_register reg2,
+ enum aarch64_insn_register base,
+ int offset,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_ldst_type type);
+u32 aarch64_insn_gen_load_store_ex(enum aarch64_insn_register reg,
+ enum aarch64_insn_register base,
+ enum aarch64_insn_register state,
+ enum aarch64_insn_size_type size,
+ enum aarch64_insn_ldst_type type);
+u32 aarch64_insn_gen_ldadd(enum aarch64_insn_register result,
+ enum aarch64_insn_register address,
+ enum aarch64_insn_register value,
+ enum aarch64_insn_size_type size);
+u32 aarch64_insn_gen_stadd(enum aarch64_insn_register address,
+ enum aarch64_insn_register value,
+ enum aarch64_insn_size_type size);
+u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int imm, enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type);
+u32 aarch64_insn_gen_adr(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_adr_type type);
+u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int immr, int imms,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_bitfield_type type);
+u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
+ int imm, int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_movewide_type type);
+u32 aarch64_insn_gen_add_sub_shifted_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type);
+u32 aarch64_insn_gen_data1(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data1_type type);
+u32 aarch64_insn_gen_data2(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data2_type type);
+u32 aarch64_insn_gen_data3(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg1,
+ enum aarch64_insn_register reg2,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data3_type type);
+u32 aarch64_insn_gen_logical_shifted_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_logic_type type);
+u32 aarch64_insn_gen_move_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_variant variant);
+u32 aarch64_insn_gen_logical_immediate(enum aarch64_insn_logic_type type,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_register Rn,
+ enum aarch64_insn_register Rd,
+ u64 imm);
+u32 aarch64_insn_gen_extr(enum aarch64_insn_variant variant,
+ enum aarch64_insn_register Rm,
+ enum aarch64_insn_register Rn,
+ enum aarch64_insn_register Rd,
+ u8 lsb);
+u32 aarch64_insn_gen_prefetch(enum aarch64_insn_register base,
+ enum aarch64_insn_prfm_type type,
+ enum aarch64_insn_prfm_target target,
+ enum aarch64_insn_prfm_policy policy);
+s32 aarch64_get_branch_offset(u32 insn);
+u32 aarch64_set_branch_offset(u32 insn, s32 offset);
+
+s32 aarch64_insn_adrp_get_offset(u32 insn);
+u32 aarch64_insn_adrp_set_offset(u32 insn, s32 offset);
+
+u32 aarch64_insn_extract_system_reg(u32 insn);
+
+
+#endif /* !__ASSEMBLY__ */
+#endif /* __ASM_AARCH64_INSN_H */
diff --git a/arch/arm64/include/asm/alternative-macros.h b/arch/arm64/include/asm/alternative-macros.h
index 5df500dcc627..c01edf4d988d 100644
--- a/arch/arm64/include/asm/alternative-macros.h
+++ b/arch/arm64/include/asm/alternative-macros.h
@@ -6,9 +6,6 @@
#define ARM64_CB_PATCH ARM64_NCAPS
-/* A64 instructions are always 32 bits. */
-#define AARCH64_INSN_SIZE 4
-
#ifndef __ASSEMBLY__
#include <linux/stringify.h>
diff --git a/arch/arm64/include/asm/alternative.h b/arch/arm64/include/asm/alternative.h
index a38b92e11811..850d6334e15a 100644
--- a/arch/arm64/include/asm/alternative.h
+++ b/arch/arm64/include/asm/alternative.h
@@ -2,6 +2,7 @@
#ifndef __ASM_ALTERNATIVE_H
#define __ASM_ALTERNATIVE_H
+#include <asm/aarch64-insn.h>
#include <asm/alternative-macros.h>
#ifndef __ASSEMBLY__
diff --git a/arch/arm64/include/asm/debug-monitors.h b/arch/arm64/include/asm/debug-monitors.h
index 657c921fd784..945362f34d04 100644
--- a/arch/arm64/include/asm/debug-monitors.h
+++ b/arch/arm64/include/asm/debug-monitors.h
@@ -9,7 +9,7 @@
#include <linux/types.h>
#include <asm/brk-imm.h>
#include <asm/esr.h>
-#include <asm/insn.h>
+#include <asm/aarch64-insn.h>
#include <asm/ptrace.h>
/* Low-level stepping controls. */
@@ -34,18 +34,6 @@
*/
#define BREAK_INSTR_SIZE AARCH64_INSN_SIZE
-/*
- * BRK instruction encoding
- * The #imm16 value should be placed at bits[20:5] within BRK ins
- */
-#define AARCH64_BREAK_MON 0xd4200000
-
-/*
- * BRK instruction for provoking a fault on purpose
- * Unlike kgdb, #imm16 value with unallocated handler is used for faulting.
- */
-#define AARCH64_BREAK_FAULT (AARCH64_BREAK_MON | (FAULT_BRK_IMM << 5))
-
#define AARCH64_BREAK_KGDB_DYN_DBG \
(AARCH64_BREAK_MON | (KGDB_DYN_DBG_BRK_IMM << 5))
diff --git a/arch/arm64/include/asm/ftrace.h b/arch/arm64/include/asm/ftrace.h
index 91fa4baa1a93..9bd315bf4513 100644
--- a/arch/arm64/include/asm/ftrace.h
+++ b/arch/arm64/include/asm/ftrace.h
@@ -8,7 +8,7 @@
#ifndef __ASM_FTRACE_H
#define __ASM_FTRACE_H
-#include <asm/insn.h>
+#include <asm/aarch64-insn.h>
#define HAVE_FUNCTION_GRAPH_FP_TEST
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index 4ebb9c054ccc..850d45879d3d 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -10,496 +10,20 @@
#include <linux/build_bug.h>
#include <linux/types.h>
-#include <asm/alternative.h>
-
#ifndef __ASSEMBLY__
-/*
- * ARM Architecture Reference Manual for ARMv8 Profile-A, Issue A.a
- * Section C3.1 "A64 instruction index by encoding":
- * AArch64 main encoding table
- * Bit position
- * 28 27 26 25 Encoding Group
- * 0 0 - - Unallocated
- * 1 0 0 - Data processing, immediate
- * 1 0 1 - Branch, exception generation and system instructions
- * - 1 - 0 Loads and stores
- * - 1 0 1 Data processing - register
- * 0 1 1 1 Data processing - SIMD and floating point
- * 1 1 1 1 Data processing - SIMD and floating point
- * "-" means "don't care"
- */
-enum aarch64_insn_encoding_class {
- AARCH64_INSN_CLS_UNKNOWN, /* UNALLOCATED */
- AARCH64_INSN_CLS_DP_IMM, /* Data processing - immediate */
- AARCH64_INSN_CLS_DP_REG, /* Data processing - register */
- AARCH64_INSN_CLS_DP_FPSIMD, /* Data processing - SIMD and FP */
- AARCH64_INSN_CLS_LDST, /* Loads and stores */
- AARCH64_INSN_CLS_BR_SYS, /* Branch, exception generation and
- * system instructions */
-};
-
-enum aarch64_insn_hint_cr_op {
- AARCH64_INSN_HINT_NOP = 0x0 << 5,
- AARCH64_INSN_HINT_YIELD = 0x1 << 5,
- AARCH64_INSN_HINT_WFE = 0x2 << 5,
- AARCH64_INSN_HINT_WFI = 0x3 << 5,
- AARCH64_INSN_HINT_SEV = 0x4 << 5,
- AARCH64_INSN_HINT_SEVL = 0x5 << 5,
-
- AARCH64_INSN_HINT_XPACLRI = 0x07 << 5,
- AARCH64_INSN_HINT_PACIA_1716 = 0x08 << 5,
- AARCH64_INSN_HINT_PACIB_1716 = 0x0A << 5,
- AARCH64_INSN_HINT_AUTIA_1716 = 0x0C << 5,
- AARCH64_INSN_HINT_AUTIB_1716 = 0x0E << 5,
- AARCH64_INSN_HINT_PACIAZ = 0x18 << 5,
- AARCH64_INSN_HINT_PACIASP = 0x19 << 5,
- AARCH64_INSN_HINT_PACIBZ = 0x1A << 5,
- AARCH64_INSN_HINT_PACIBSP = 0x1B << 5,
- AARCH64_INSN_HINT_AUTIAZ = 0x1C << 5,
- AARCH64_INSN_HINT_AUTIASP = 0x1D << 5,
- AARCH64_INSN_HINT_AUTIBZ = 0x1E << 5,
- AARCH64_INSN_HINT_AUTIBSP = 0x1F << 5,
-
- AARCH64_INSN_HINT_ESB = 0x10 << 5,
- AARCH64_INSN_HINT_PSB = 0x11 << 5,
- AARCH64_INSN_HINT_TSB = 0x12 << 5,
- AARCH64_INSN_HINT_CSDB = 0x14 << 5,
-
- AARCH64_INSN_HINT_BTI = 0x20 << 5,
- AARCH64_INSN_HINT_BTIC = 0x22 << 5,
- AARCH64_INSN_HINT_BTIJ = 0x24 << 5,
- AARCH64_INSN_HINT_BTIJC = 0x26 << 5,
-};
-
-enum aarch64_insn_imm_type {
- AARCH64_INSN_IMM_ADR,
- AARCH64_INSN_IMM_26,
- AARCH64_INSN_IMM_19,
- AARCH64_INSN_IMM_16,
- AARCH64_INSN_IMM_14,
- AARCH64_INSN_IMM_12,
- AARCH64_INSN_IMM_9,
- AARCH64_INSN_IMM_7,
- AARCH64_INSN_IMM_6,
- AARCH64_INSN_IMM_S,
- AARCH64_INSN_IMM_R,
- AARCH64_INSN_IMM_N,
- AARCH64_INSN_IMM_MAX
-};
-
-enum aarch64_insn_register_type {
- AARCH64_INSN_REGTYPE_RT,
- AARCH64_INSN_REGTYPE_RN,
- AARCH64_INSN_REGTYPE_RT2,
- AARCH64_INSN_REGTYPE_RM,
- AARCH64_INSN_REGTYPE_RD,
- AARCH64_INSN_REGTYPE_RA,
- AARCH64_INSN_REGTYPE_RS,
-};
-
-enum aarch64_insn_register {
- AARCH64_INSN_REG_0 = 0,
- AARCH64_INSN_REG_1 = 1,
- AARCH64_INSN_REG_2 = 2,
- AARCH64_INSN_REG_3 = 3,
- AARCH64_INSN_REG_4 = 4,
- AARCH64_INSN_REG_5 = 5,
- AARCH64_INSN_REG_6 = 6,
- AARCH64_INSN_REG_7 = 7,
- AARCH64_INSN_REG_8 = 8,
- AARCH64_INSN_REG_9 = 9,
- AARCH64_INSN_REG_10 = 10,
- AARCH64_INSN_REG_11 = 11,
- AARCH64_INSN_REG_12 = 12,
- AARCH64_INSN_REG_13 = 13,
- AARCH64_INSN_REG_14 = 14,
- AARCH64_INSN_REG_15 = 15,
- AARCH64_INSN_REG_16 = 16,
- AARCH64_INSN_REG_17 = 17,
- AARCH64_INSN_REG_18 = 18,
- AARCH64_INSN_REG_19 = 19,
- AARCH64_INSN_REG_20 = 20,
- AARCH64_INSN_REG_21 = 21,
- AARCH64_INSN_REG_22 = 22,
- AARCH64_INSN_REG_23 = 23,
- AARCH64_INSN_REG_24 = 24,
- AARCH64_INSN_REG_25 = 25,
- AARCH64_INSN_REG_26 = 26,
- AARCH64_INSN_REG_27 = 27,
- AARCH64_INSN_REG_28 = 28,
- AARCH64_INSN_REG_29 = 29,
- AARCH64_INSN_REG_FP = 29, /* Frame pointer */
- AARCH64_INSN_REG_30 = 30,
- AARCH64_INSN_REG_LR = 30, /* Link register */
- AARCH64_INSN_REG_ZR = 31, /* Zero: as source register */
- AARCH64_INSN_REG_SP = 31 /* Stack pointer: as load/store base reg */
-};
-
-enum aarch64_insn_special_register {
- AARCH64_INSN_SPCLREG_SPSR_EL1 = 0xC200,
- AARCH64_INSN_SPCLREG_ELR_EL1 = 0xC201,
- AARCH64_INSN_SPCLREG_SP_EL0 = 0xC208,
- AARCH64_INSN_SPCLREG_SPSEL = 0xC210,
- AARCH64_INSN_SPCLREG_CURRENTEL = 0xC212,
- AARCH64_INSN_SPCLREG_DAIF = 0xDA11,
- AARCH64_INSN_SPCLREG_NZCV = 0xDA10,
- AARCH64_INSN_SPCLREG_FPCR = 0xDA20,
- AARCH64_INSN_SPCLREG_DSPSR_EL0 = 0xDA28,
- AARCH64_INSN_SPCLREG_DLR_EL0 = 0xDA29,
- AARCH64_INSN_SPCLREG_SPSR_EL2 = 0xE200,
- AARCH64_INSN_SPCLREG_ELR_EL2 = 0xE201,
- AARCH64_INSN_SPCLREG_SP_EL1 = 0xE208,
- AARCH64_INSN_SPCLREG_SPSR_INQ = 0xE218,
- AARCH64_INSN_SPCLREG_SPSR_ABT = 0xE219,
- AARCH64_INSN_SPCLREG_SPSR_UND = 0xE21A,
- AARCH64_INSN_SPCLREG_SPSR_FIQ = 0xE21B,
- AARCH64_INSN_SPCLREG_SPSR_EL3 = 0xF200,
- AARCH64_INSN_SPCLREG_ELR_EL3 = 0xF201,
- AARCH64_INSN_SPCLREG_SP_EL2 = 0xF210
-};
-
-enum aarch64_insn_variant {
- AARCH64_INSN_VARIANT_32BIT,
- AARCH64_INSN_VARIANT_64BIT
-};
-
-enum aarch64_insn_condition {
- AARCH64_INSN_COND_EQ = 0x0, /* == */
- AARCH64_INSN_COND_NE = 0x1, /* != */
- AARCH64_INSN_COND_CS = 0x2, /* unsigned >= */
- AARCH64_INSN_COND_CC = 0x3, /* unsigned < */
- AARCH64_INSN_COND_MI = 0x4, /* < 0 */
- AARCH64_INSN_COND_PL = 0x5, /* >= 0 */
- AARCH64_INSN_COND_VS = 0x6, /* overflow */
- AARCH64_INSN_COND_VC = 0x7, /* no overflow */
- AARCH64_INSN_COND_HI = 0x8, /* unsigned > */
- AARCH64_INSN_COND_LS = 0x9, /* unsigned <= */
- AARCH64_INSN_COND_GE = 0xa, /* signed >= */
- AARCH64_INSN_COND_LT = 0xb, /* signed < */
- AARCH64_INSN_COND_GT = 0xc, /* signed > */
- AARCH64_INSN_COND_LE = 0xd, /* signed <= */
- AARCH64_INSN_COND_AL = 0xe, /* always */
-};
-
-enum aarch64_insn_branch_type {
- AARCH64_INSN_BRANCH_NOLINK,
- AARCH64_INSN_BRANCH_LINK,
- AARCH64_INSN_BRANCH_RETURN,
- AARCH64_INSN_BRANCH_COMP_ZERO,
- AARCH64_INSN_BRANCH_COMP_NONZERO,
-};
-
-enum aarch64_insn_size_type {
- AARCH64_INSN_SIZE_8,
- AARCH64_INSN_SIZE_16,
- AARCH64_INSN_SIZE_32,
- AARCH64_INSN_SIZE_64,
-};
-
-enum aarch64_insn_ldst_type {
- AARCH64_INSN_LDST_LOAD_REG_OFFSET,
- AARCH64_INSN_LDST_STORE_REG_OFFSET,
- AARCH64_INSN_LDST_LOAD_PAIR_PRE_INDEX,
- AARCH64_INSN_LDST_STORE_PAIR_PRE_INDEX,
- AARCH64_INSN_LDST_LOAD_PAIR_POST_INDEX,
- AARCH64_INSN_LDST_STORE_PAIR_POST_INDEX,
- AARCH64_INSN_LDST_LOAD_EX,
- AARCH64_INSN_LDST_STORE_EX,
-};
-
-enum aarch64_insn_adsb_type {
- AARCH64_INSN_ADSB_ADD,
- AARCH64_INSN_ADSB_SUB,
- AARCH64_INSN_ADSB_ADD_SETFLAGS,
- AARCH64_INSN_ADSB_SUB_SETFLAGS
-};
-
-enum aarch64_insn_movewide_type {
- AARCH64_INSN_MOVEWIDE_ZERO,
- AARCH64_INSN_MOVEWIDE_KEEP,
- AARCH64_INSN_MOVEWIDE_INVERSE
-};
-
-enum aarch64_insn_bitfield_type {
- AARCH64_INSN_BITFIELD_MOVE,
- AARCH64_INSN_BITFIELD_MOVE_UNSIGNED,
- AARCH64_INSN_BITFIELD_MOVE_SIGNED
-};
-
-enum aarch64_insn_data1_type {
- AARCH64_INSN_DATA1_REVERSE_16,
- AARCH64_INSN_DATA1_REVERSE_32,
- AARCH64_INSN_DATA1_REVERSE_64,
-};
-
-enum aarch64_insn_data2_type {
- AARCH64_INSN_DATA2_UDIV,
- AARCH64_INSN_DATA2_SDIV,
- AARCH64_INSN_DATA2_LSLV,
- AARCH64_INSN_DATA2_LSRV,
- AARCH64_INSN_DATA2_ASRV,
- AARCH64_INSN_DATA2_RORV,
-};
-
-enum aarch64_insn_data3_type {
- AARCH64_INSN_DATA3_MADD,
- AARCH64_INSN_DATA3_MSUB,
-};
-
-enum aarch64_insn_logic_type {
- AARCH64_INSN_LOGIC_AND,
- AARCH64_INSN_LOGIC_BIC,
- AARCH64_INSN_LOGIC_ORR,
- AARCH64_INSN_LOGIC_ORN,
- AARCH64_INSN_LOGIC_EOR,
- AARCH64_INSN_LOGIC_EON,
- AARCH64_INSN_LOGIC_AND_SETFLAGS,
- AARCH64_INSN_LOGIC_BIC_SETFLAGS
-};
-
-enum aarch64_insn_prfm_type {
- AARCH64_INSN_PRFM_TYPE_PLD,
- AARCH64_INSN_PRFM_TYPE_PLI,
- AARCH64_INSN_PRFM_TYPE_PST,
-};
-
-enum aarch64_insn_prfm_target {
- AARCH64_INSN_PRFM_TARGET_L1,
- AARCH64_INSN_PRFM_TARGET_L2,
- AARCH64_INSN_PRFM_TARGET_L3,
-};
-
-enum aarch64_insn_prfm_policy {
- AARCH64_INSN_PRFM_POLICY_KEEP,
- AARCH64_INSN_PRFM_POLICY_STRM,
-};
-
-enum aarch64_insn_adr_type {
- AARCH64_INSN_ADR_TYPE_ADRP,
- AARCH64_INSN_ADR_TYPE_ADR,
-};
-
-#define __AARCH64_INSN_FUNCS(abbr, mask, val) \
-static __always_inline bool aarch64_insn_is_##abbr(u32 code) \
-{ \
- BUILD_BUG_ON(~(mask) & (val)); \
- return (code & (mask)) == (val); \
-} \
-static __always_inline u32 aarch64_insn_get_##abbr##_value(void) \
-{ \
- return (val); \
-}
-
-__AARCH64_INSN_FUNCS(adr, 0x9F000000, 0x10000000)
-__AARCH64_INSN_FUNCS(adrp, 0x9F000000, 0x90000000)
-__AARCH64_INSN_FUNCS(prfm, 0x3FC00000, 0x39800000)
-__AARCH64_INSN_FUNCS(prfm_lit, 0xFF000000, 0xD8000000)
-__AARCH64_INSN_FUNCS(str_reg, 0x3FE0EC00, 0x38206800)
-__AARCH64_INSN_FUNCS(ldadd, 0x3F20FC00, 0x38200000)
-__AARCH64_INSN_FUNCS(ldr_reg, 0x3FE0EC00, 0x38606800)
-__AARCH64_INSN_FUNCS(ldr_lit, 0xBF000000, 0x18000000)
-__AARCH64_INSN_FUNCS(ldrsw_lit, 0xFF000000, 0x98000000)
-__AARCH64_INSN_FUNCS(exclusive, 0x3F800000, 0x08000000)
-__AARCH64_INSN_FUNCS(load_ex, 0x3F400000, 0x08400000)
-__AARCH64_INSN_FUNCS(store_ex, 0x3F400000, 0x08000000)
-__AARCH64_INSN_FUNCS(stp_post, 0x7FC00000, 0x28800000)
-__AARCH64_INSN_FUNCS(ldp_post, 0x7FC00000, 0x28C00000)
-__AARCH64_INSN_FUNCS(stp_pre, 0x7FC00000, 0x29800000)
-__AARCH64_INSN_FUNCS(ldp_pre, 0x7FC00000, 0x29C00000)
-__AARCH64_INSN_FUNCS(add_imm, 0x7F000000, 0x11000000)
-__AARCH64_INSN_FUNCS(adds_imm, 0x7F000000, 0x31000000)
-__AARCH64_INSN_FUNCS(sub_imm, 0x7F000000, 0x51000000)
-__AARCH64_INSN_FUNCS(subs_imm, 0x7F000000, 0x71000000)
-__AARCH64_INSN_FUNCS(movn, 0x7F800000, 0x12800000)
-__AARCH64_INSN_FUNCS(sbfm, 0x7F800000, 0x13000000)
-__AARCH64_INSN_FUNCS(bfm, 0x7F800000, 0x33000000)
-__AARCH64_INSN_FUNCS(movz, 0x7F800000, 0x52800000)
-__AARCH64_INSN_FUNCS(ubfm, 0x7F800000, 0x53000000)
-__AARCH64_INSN_FUNCS(movk, 0x7F800000, 0x72800000)
-__AARCH64_INSN_FUNCS(add, 0x7F200000, 0x0B000000)
-__AARCH64_INSN_FUNCS(adds, 0x7F200000, 0x2B000000)
-__AARCH64_INSN_FUNCS(sub, 0x7F200000, 0x4B000000)
-__AARCH64_INSN_FUNCS(subs, 0x7F200000, 0x6B000000)
-__AARCH64_INSN_FUNCS(madd, 0x7FE08000, 0x1B000000)
-__AARCH64_INSN_FUNCS(msub, 0x7FE08000, 0x1B008000)
-__AARCH64_INSN_FUNCS(udiv, 0x7FE0FC00, 0x1AC00800)
-__AARCH64_INSN_FUNCS(sdiv, 0x7FE0FC00, 0x1AC00C00)
-__AARCH64_INSN_FUNCS(lslv, 0x7FE0FC00, 0x1AC02000)
-__AARCH64_INSN_FUNCS(lsrv, 0x7FE0FC00, 0x1AC02400)
-__AARCH64_INSN_FUNCS(asrv, 0x7FE0FC00, 0x1AC02800)
-__AARCH64_INSN_FUNCS(rorv, 0x7FE0FC00, 0x1AC02C00)
-__AARCH64_INSN_FUNCS(rev16, 0x7FFFFC00, 0x5AC00400)
-__AARCH64_INSN_FUNCS(rev32, 0x7FFFFC00, 0x5AC00800)
-__AARCH64_INSN_FUNCS(rev64, 0x7FFFFC00, 0x5AC00C00)
-__AARCH64_INSN_FUNCS(and, 0x7F200000, 0x0A000000)
-__AARCH64_INSN_FUNCS(bic, 0x7F200000, 0x0A200000)
-__AARCH64_INSN_FUNCS(orr, 0x7F200000, 0x2A000000)
-__AARCH64_INSN_FUNCS(orn, 0x7F200000, 0x2A200000)
-__AARCH64_INSN_FUNCS(eor, 0x7F200000, 0x4A000000)
-__AARCH64_INSN_FUNCS(eon, 0x7F200000, 0x4A200000)
-__AARCH64_INSN_FUNCS(ands, 0x7F200000, 0x6A000000)
-__AARCH64_INSN_FUNCS(bics, 0x7F200000, 0x6A200000)
-__AARCH64_INSN_FUNCS(and_imm, 0x7F800000, 0x12000000)
-__AARCH64_INSN_FUNCS(orr_imm, 0x7F800000, 0x32000000)
-__AARCH64_INSN_FUNCS(eor_imm, 0x7F800000, 0x52000000)
-__AARCH64_INSN_FUNCS(ands_imm, 0x7F800000, 0x72000000)
-__AARCH64_INSN_FUNCS(extr, 0x7FA00000, 0x13800000)
-__AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000)
-__AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000)
-__AARCH64_INSN_FUNCS(cbz, 0x7F000000, 0x34000000)
-__AARCH64_INSN_FUNCS(cbnz, 0x7F000000, 0x35000000)
-__AARCH64_INSN_FUNCS(tbz, 0x7F000000, 0x36000000)
-__AARCH64_INSN_FUNCS(tbnz, 0x7F000000, 0x37000000)
-__AARCH64_INSN_FUNCS(bcond, 0xFF000010, 0x54000000)
-__AARCH64_INSN_FUNCS(svc, 0xFFE0001F, 0xD4000001)
-__AARCH64_INSN_FUNCS(hvc, 0xFFE0001F, 0xD4000002)
-__AARCH64_INSN_FUNCS(smc, 0xFFE0001F, 0xD4000003)
-__AARCH64_INSN_FUNCS(brk, 0xFFE0001F, 0xD4200000)
-__AARCH64_INSN_FUNCS(exception, 0xFF000000, 0xD4000000)
-__AARCH64_INSN_FUNCS(hint, 0xFFFFF01F, 0xD503201F)
-__AARCH64_INSN_FUNCS(br, 0xFFFFFC1F, 0xD61F0000)
-__AARCH64_INSN_FUNCS(br_auth, 0xFEFFF800, 0xD61F0800)
-__AARCH64_INSN_FUNCS(blr, 0xFFFFFC1F, 0xD63F0000)
-__AARCH64_INSN_FUNCS(blr_auth, 0xFEFFF800, 0xD63F0800)
-__AARCH64_INSN_FUNCS(ret, 0xFFFFFC1F, 0xD65F0000)
-__AARCH64_INSN_FUNCS(ret_auth, 0xFFFFFBFF, 0xD65F0BFF)
-__AARCH64_INSN_FUNCS(eret, 0xFFFFFFFF, 0xD69F03E0)
-__AARCH64_INSN_FUNCS(eret_auth, 0xFFFFFBFF, 0xD69F0BFF)
-__AARCH64_INSN_FUNCS(mrs, 0xFFF00000, 0xD5300000)
-__AARCH64_INSN_FUNCS(msr_imm, 0xFFF8F01F, 0xD500401F)
-__AARCH64_INSN_FUNCS(msr_reg, 0xFFF00000, 0xD5100000)
-
-#undef __AARCH64_INSN_FUNCS
-
-bool aarch64_insn_is_steppable_hint(u32 insn);
-bool aarch64_insn_is_branch_imm(u32 insn);
-
-static inline bool aarch64_insn_is_adr_adrp(u32 insn)
-{
- return aarch64_insn_is_adr(insn) || aarch64_insn_is_adrp(insn);
-}
int aarch64_insn_read(void *addr, u32 *insnp);
int aarch64_insn_write(void *addr, u32 insn);
-enum aarch64_insn_encoding_class aarch64_get_insn_class(u32 insn);
-bool aarch64_insn_uses_literal(u32 insn);
-bool aarch64_insn_is_branch(u32 insn);
-u64 aarch64_insn_decode_immediate(enum aarch64_insn_imm_type type, u32 insn);
-u32 aarch64_insn_encode_immediate(enum aarch64_insn_imm_type type,
- u32 insn, u64 imm);
-u32 aarch64_insn_decode_register(enum aarch64_insn_register_type type,
- u32 insn);
-u32 aarch64_insn_gen_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_branch_type type);
-u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_register reg,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_branch_type type);
-u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_condition cond);
-u32 aarch64_insn_gen_hint(enum aarch64_insn_hint_cr_op op);
-u32 aarch64_insn_gen_nop(void);
-u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg,
- enum aarch64_insn_branch_type type);
-u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg,
- enum aarch64_insn_register base,
- enum aarch64_insn_register offset,
- enum aarch64_insn_size_type size,
- enum aarch64_insn_ldst_type type);
-u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
- enum aarch64_insn_register reg2,
- enum aarch64_insn_register base,
- int offset,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_ldst_type type);
-u32 aarch64_insn_gen_load_store_ex(enum aarch64_insn_register reg,
- enum aarch64_insn_register base,
- enum aarch64_insn_register state,
- enum aarch64_insn_size_type size,
- enum aarch64_insn_ldst_type type);
-u32 aarch64_insn_gen_ldadd(enum aarch64_insn_register result,
- enum aarch64_insn_register address,
- enum aarch64_insn_register value,
- enum aarch64_insn_size_type size);
-u32 aarch64_insn_gen_stadd(enum aarch64_insn_register address,
- enum aarch64_insn_register value,
- enum aarch64_insn_size_type size);
-u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- int imm, enum aarch64_insn_variant variant,
- enum aarch64_insn_adsb_type type);
-u32 aarch64_insn_gen_adr(unsigned long pc, unsigned long addr,
- enum aarch64_insn_register reg,
- enum aarch64_insn_adr_type type);
-u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- int immr, int imms,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_bitfield_type type);
-u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
- int imm, int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_movewide_type type);
-u32 aarch64_insn_gen_add_sub_shifted_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_adsb_type type);
-u32 aarch64_insn_gen_data1(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data1_type type);
-u32 aarch64_insn_gen_data2(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data2_type type);
-u32 aarch64_insn_gen_data3(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg1,
- enum aarch64_insn_register reg2,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data3_type type);
-u32 aarch64_insn_gen_logical_shifted_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_logic_type type);
-u32 aarch64_insn_gen_move_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_variant variant);
-u32 aarch64_insn_gen_logical_immediate(enum aarch64_insn_logic_type type,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_register Rn,
- enum aarch64_insn_register Rd,
- u64 imm);
-u32 aarch64_insn_gen_extr(enum aarch64_insn_variant variant,
- enum aarch64_insn_register Rm,
- enum aarch64_insn_register Rn,
- enum aarch64_insn_register Rd,
- u8 lsb);
-u32 aarch64_insn_gen_prefetch(enum aarch64_insn_register base,
- enum aarch64_insn_prfm_type type,
- enum aarch64_insn_prfm_target target,
- enum aarch64_insn_prfm_policy policy);
-s32 aarch64_get_branch_offset(u32 insn);
-u32 aarch64_set_branch_offset(u32 insn, s32 offset);
int aarch64_insn_patch_text_nosync(void *addr, u32 insn);
int aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt);
-s32 aarch64_insn_adrp_get_offset(u32 insn);
-u32 aarch64_insn_adrp_set_offset(u32 insn, s32 offset);
-
bool aarch32_insn_is_wide(u32 insn);
#define A32_RN_OFFSET 16
#define A32_RT_OFFSET 12
#define A32_RT2_OFFSET 0
-u32 aarch64_insn_extract_system_reg(u32 insn);
u32 aarch32_insn_extract_reg_num(u32 insn, int offset);
u32 aarch32_insn_mcr_extract_opc2(u32 insn);
u32 aarch32_insn_mcr_extract_crm(u32 insn);
diff --git a/arch/arm64/include/asm/jump_label.h b/arch/arm64/include/asm/jump_label.h
index cea441b6aa5d..9004b6ab6938 100644
--- a/arch/arm64/include/asm/jump_label.h
+++ b/arch/arm64/include/asm/jump_label.h
@@ -11,7 +11,7 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
-#include <asm/insn.h>
+#include <asm/aarch64-insn.h>
#define JUMP_LABEL_NOP_SIZE AARCH64_INSN_SIZE
diff --git a/arch/arm64/include/asm/uprobes.h b/arch/arm64/include/asm/uprobes.h
index 315eef654e39..cfbe4cbb0e1e 100644
--- a/arch/arm64/include/asm/uprobes.h
+++ b/arch/arm64/include/asm/uprobes.h
@@ -7,7 +7,7 @@
#define _ASM_UPROBES_H
#include <asm/debug-monitors.h>
-#include <asm/insn.h>
+#include <asm/aarch64-insn.h>
#include <asm/probes.h>
#define MAX_UINSN_BYTES AARCH64_INSN_SIZE
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 6c0de2f60ea9..846cc48e47cb 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -16,6 +16,7 @@
#include <linux/types.h>
#include <linux/uaccess.h>
+#include <asm/aarch64-insn.h>
#include <asm/cacheflush.h>
#include <asm/debug-monitors.h>
#include <asm/fixmap.h>
@@ -23,66 +24,6 @@
#include <asm/kprobes.h>
#include <asm/sections.h>
-#define AARCH64_INSN_SF_BIT BIT(31)
-#define AARCH64_INSN_N_BIT BIT(22)
-#define AARCH64_INSN_LSL_12 BIT(22)
-
-static const int aarch64_insn_encoding_class[] = {
- AARCH64_INSN_CLS_UNKNOWN,
- AARCH64_INSN_CLS_UNKNOWN,
- AARCH64_INSN_CLS_UNKNOWN,
- AARCH64_INSN_CLS_UNKNOWN,
- AARCH64_INSN_CLS_LDST,
- AARCH64_INSN_CLS_DP_REG,
- AARCH64_INSN_CLS_LDST,
- AARCH64_INSN_CLS_DP_FPSIMD,
- AARCH64_INSN_CLS_DP_IMM,
- AARCH64_INSN_CLS_DP_IMM,
- AARCH64_INSN_CLS_BR_SYS,
- AARCH64_INSN_CLS_BR_SYS,
- AARCH64_INSN_CLS_LDST,
- AARCH64_INSN_CLS_DP_REG,
- AARCH64_INSN_CLS_LDST,
- AARCH64_INSN_CLS_DP_FPSIMD,
-};
-
-enum aarch64_insn_encoding_class __kprobes aarch64_get_insn_class(u32 insn)
-{
- return aarch64_insn_encoding_class[(insn >> 25) & 0xf];
-}
-
-bool __kprobes aarch64_insn_is_steppable_hint(u32 insn)
-{
- if (!aarch64_insn_is_hint(insn))
- return false;
-
- switch (insn & 0xFE0) {
- case AARCH64_INSN_HINT_XPACLRI:
- case AARCH64_INSN_HINT_PACIA_1716:
- case AARCH64_INSN_HINT_PACIB_1716:
- case AARCH64_INSN_HINT_PACIAZ:
- case AARCH64_INSN_HINT_PACIASP:
- case AARCH64_INSN_HINT_PACIBZ:
- case AARCH64_INSN_HINT_PACIBSP:
- case AARCH64_INSN_HINT_BTI:
- case AARCH64_INSN_HINT_BTIC:
- case AARCH64_INSN_HINT_BTIJ:
- case AARCH64_INSN_HINT_BTIJC:
- case AARCH64_INSN_HINT_NOP:
- return true;
- default:
- return false;
- }
-}
-
-bool aarch64_insn_is_branch_imm(u32 insn)
-{
- return (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn) ||
- aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn) ||
- aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
- aarch64_insn_is_bcond(insn));
-}
-
static DEFINE_RAW_SPINLOCK(patch_lock);
static bool is_exit_text(unsigned long addr)
@@ -158,35 +99,6 @@ int __kprobes aarch64_insn_write(void *addr, u32 insn)
return __aarch64_insn_write(addr, cpu_to_le32(insn));
}
-bool __kprobes aarch64_insn_uses_literal(u32 insn)
-{
- /* ldr/ldrsw (literal), prfm */
-
- return aarch64_insn_is_ldr_lit(insn) ||
- aarch64_insn_is_ldrsw_lit(insn) ||
- aarch64_insn_is_adr_adrp(insn) ||
- aarch64_insn_is_prfm_lit(insn);
-}
-
-bool __kprobes aarch64_insn_is_branch(u32 insn)
-{
- /* b, bl, cb*, tb*, ret*, b.cond, br*, blr* */
-
- return aarch64_insn_is_b(insn) ||
- aarch64_insn_is_bl(insn) ||
- aarch64_insn_is_cbz(insn) ||
- aarch64_insn_is_cbnz(insn) ||
- aarch64_insn_is_tbz(insn) ||
- aarch64_insn_is_tbnz(insn) ||
- aarch64_insn_is_ret(insn) ||
- aarch64_insn_is_ret_auth(insn) ||
- aarch64_insn_is_br(insn) ||
- aarch64_insn_is_br_auth(insn) ||
- aarch64_insn_is_blr(insn) ||
- aarch64_insn_is_blr_auth(insn) ||
- aarch64_insn_is_bcond(insn);
-}
-
int __kprobes aarch64_insn_patch_text_nosync(void *addr, u32 insn)
{
u32 *tp = addr;
@@ -248,1164 +160,6 @@ int __kprobes aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt)
cpu_online_mask);
}
-static int __kprobes aarch64_get_imm_shift_mask(enum aarch64_insn_imm_type type,
- u32 *maskp, int *shiftp)
-{
- u32 mask;
- int shift;
-
- switch (type) {
- case AARCH64_INSN_IMM_26:
- mask = BIT(26) - 1;
- shift = 0;
- break;
- case AARCH64_INSN_IMM_19:
- mask = BIT(19) - 1;
- shift = 5;
- break;
- case AARCH64_INSN_IMM_16:
- mask = BIT(16) - 1;
- shift = 5;
- break;
- case AARCH64_INSN_IMM_14:
- mask = BIT(14) - 1;
- shift = 5;
- break;
- case AARCH64_INSN_IMM_12:
- mask = BIT(12) - 1;
- shift = 10;
- break;
- case AARCH64_INSN_IMM_9:
- mask = BIT(9) - 1;
- shift = 12;
- break;
- case AARCH64_INSN_IMM_7:
- mask = BIT(7) - 1;
- shift = 15;
- break;
- case AARCH64_INSN_IMM_6:
- case AARCH64_INSN_IMM_S:
- mask = BIT(6) - 1;
- shift = 10;
- break;
- case AARCH64_INSN_IMM_R:
- mask = BIT(6) - 1;
- shift = 16;
- break;
- case AARCH64_INSN_IMM_N:
- mask = 1;
- shift = 22;
- break;
- default:
- return -EINVAL;
- }
-
- *maskp = mask;
- *shiftp = shift;
-
- return 0;
-}
-
-#define ADR_IMM_HILOSPLIT 2
-#define ADR_IMM_SIZE SZ_2M
-#define ADR_IMM_LOMASK ((1 << ADR_IMM_HILOSPLIT) - 1)
-#define ADR_IMM_HIMASK ((ADR_IMM_SIZE >> ADR_IMM_HILOSPLIT) - 1)
-#define ADR_IMM_LOSHIFT 29
-#define ADR_IMM_HISHIFT 5
-
-u64 aarch64_insn_decode_immediate(enum aarch64_insn_imm_type type, u32 insn)
-{
- u32 immlo, immhi, mask;
- int shift;
-
- switch (type) {
- case AARCH64_INSN_IMM_ADR:
- shift = 0;
- immlo = (insn >> ADR_IMM_LOSHIFT) & ADR_IMM_LOMASK;
- immhi = (insn >> ADR_IMM_HISHIFT) & ADR_IMM_HIMASK;
- insn = (immhi << ADR_IMM_HILOSPLIT) | immlo;
- mask = ADR_IMM_SIZE - 1;
- break;
- default:
- if (aarch64_get_imm_shift_mask(type, &mask, &shift) < 0) {
- pr_err("aarch64_insn_decode_immediate: unknown immediate encoding %d\n",
- type);
- return 0;
- }
- }
-
- return (insn >> shift) & mask;
-}
-
-u32 __kprobes aarch64_insn_encode_immediate(enum aarch64_insn_imm_type type,
- u32 insn, u64 imm)
-{
- u32 immlo, immhi, mask;
- int shift;
-
- if (insn == AARCH64_BREAK_FAULT)
- return AARCH64_BREAK_FAULT;
-
- switch (type) {
- case AARCH64_INSN_IMM_ADR:
- shift = 0;
- immlo = (imm & ADR_IMM_LOMASK) << ADR_IMM_LOSHIFT;
- imm >>= ADR_IMM_HILOSPLIT;
- immhi = (imm & ADR_IMM_HIMASK) << ADR_IMM_HISHIFT;
- imm = immlo | immhi;
- mask = ((ADR_IMM_LOMASK << ADR_IMM_LOSHIFT) |
- (ADR_IMM_HIMASK << ADR_IMM_HISHIFT));
- break;
- default:
- if (aarch64_get_imm_shift_mask(type, &mask, &shift) < 0) {
- pr_err("aarch64_insn_encode_immediate: unknown immediate encoding %d\n",
- type);
- return AARCH64_BREAK_FAULT;
- }
- }
-
- /* Update the immediate field. */
- insn &= ~(mask << shift);
- insn |= (imm & mask) << shift;
-
- return insn;
-}
-
-u32 aarch64_insn_decode_register(enum aarch64_insn_register_type type,
- u32 insn)
-{
- int shift;
-
- switch (type) {
- case AARCH64_INSN_REGTYPE_RT:
- case AARCH64_INSN_REGTYPE_RD:
- shift = 0;
- break;
- case AARCH64_INSN_REGTYPE_RN:
- shift = 5;
- break;
- case AARCH64_INSN_REGTYPE_RT2:
- case AARCH64_INSN_REGTYPE_RA:
- shift = 10;
- break;
- case AARCH64_INSN_REGTYPE_RM:
- shift = 16;
- break;
- default:
- pr_err("%s: unknown register type encoding %d\n", __func__,
- type);
- return 0;
- }
-
- return (insn >> shift) & GENMASK(4, 0);
-}
-
-static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type,
- u32 insn,
- enum aarch64_insn_register reg)
-{
- int shift;
-
- if (insn == AARCH64_BREAK_FAULT)
- return AARCH64_BREAK_FAULT;
-
- if (reg < AARCH64_INSN_REG_0 || reg > AARCH64_INSN_REG_SP) {
- pr_err("%s: unknown register encoding %d\n", __func__, reg);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (type) {
- case AARCH64_INSN_REGTYPE_RT:
- case AARCH64_INSN_REGTYPE_RD:
- shift = 0;
- break;
- case AARCH64_INSN_REGTYPE_RN:
- shift = 5;
- break;
- case AARCH64_INSN_REGTYPE_RT2:
- case AARCH64_INSN_REGTYPE_RA:
- shift = 10;
- break;
- case AARCH64_INSN_REGTYPE_RM:
- case AARCH64_INSN_REGTYPE_RS:
- shift = 16;
- break;
- default:
- pr_err("%s: unknown register type encoding %d\n", __func__,
- type);
- return AARCH64_BREAK_FAULT;
- }
-
- insn &= ~(GENMASK(4, 0) << shift);
- insn |= reg << shift;
-
- return insn;
-}
-
-static u32 aarch64_insn_encode_ldst_size(enum aarch64_insn_size_type type,
- u32 insn)
-{
- u32 size;
-
- switch (type) {
- case AARCH64_INSN_SIZE_8:
- size = 0;
- break;
- case AARCH64_INSN_SIZE_16:
- size = 1;
- break;
- case AARCH64_INSN_SIZE_32:
- size = 2;
- break;
- case AARCH64_INSN_SIZE_64:
- size = 3;
- break;
- default:
- pr_err("%s: unknown size encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- insn &= ~GENMASK(31, 30);
- insn |= size << 30;
-
- return insn;
-}
-
-static inline long branch_imm_common(unsigned long pc, unsigned long addr,
- long range)
-{
- long offset;
-
- if ((pc & 0x3) || (addr & 0x3)) {
- pr_err("%s: A64 instructions must be word aligned\n", __func__);
- return range;
- }
-
- offset = ((long)addr - (long)pc);
-
- if (offset < -range || offset >= range) {
- pr_err("%s: offset out of range\n", __func__);
- return range;
- }
-
- return offset;
-}
-
-u32 __kprobes aarch64_insn_gen_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_branch_type type)
-{
- u32 insn;
- long offset;
-
- /*
- * B/BL support [-128M, 128M) offset
- * ARM64 virtual address arrangement guarantees all kernel and module
- * texts are within +/-128M.
- */
- offset = branch_imm_common(pc, addr, SZ_128M);
- if (offset >= SZ_128M)
- return AARCH64_BREAK_FAULT;
-
- switch (type) {
- case AARCH64_INSN_BRANCH_LINK:
- insn = aarch64_insn_get_bl_value();
- break;
- case AARCH64_INSN_BRANCH_NOLINK:
- insn = aarch64_insn_get_b_value();
- break;
- default:
- pr_err("%s: unknown branch encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_26, insn,
- offset >> 2);
-}
-
-u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_register reg,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_branch_type type)
-{
- u32 insn;
- long offset;
-
- offset = branch_imm_common(pc, addr, SZ_1M);
- if (offset >= SZ_1M)
- return AARCH64_BREAK_FAULT;
-
- switch (type) {
- case AARCH64_INSN_BRANCH_COMP_ZERO:
- insn = aarch64_insn_get_cbz_value();
- break;
- case AARCH64_INSN_BRANCH_COMP_NONZERO:
- insn = aarch64_insn_get_cbnz_value();
- break;
- default:
- pr_err("%s: unknown branch encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn, reg);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
- offset >> 2);
-}
-
-u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr,
- enum aarch64_insn_condition cond)
-{
- u32 insn;
- long offset;
-
- offset = branch_imm_common(pc, addr, SZ_1M);
-
- insn = aarch64_insn_get_bcond_value();
-
- if (cond < AARCH64_INSN_COND_EQ || cond > AARCH64_INSN_COND_AL) {
- pr_err("%s: unknown condition encoding %d\n", __func__, cond);
- return AARCH64_BREAK_FAULT;
- }
- insn |= cond;
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
- offset >> 2);
-}
-
-u32 __kprobes aarch64_insn_gen_hint(enum aarch64_insn_hint_cr_op op)
-{
- return aarch64_insn_get_hint_value() | op;
-}
-
-u32 __kprobes aarch64_insn_gen_nop(void)
-{
- return aarch64_insn_gen_hint(AARCH64_INSN_HINT_NOP);
-}
-
-u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg,
- enum aarch64_insn_branch_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_BRANCH_NOLINK:
- insn = aarch64_insn_get_br_value();
- break;
- case AARCH64_INSN_BRANCH_LINK:
- insn = aarch64_insn_get_blr_value();
- break;
- case AARCH64_INSN_BRANCH_RETURN:
- insn = aarch64_insn_get_ret_value();
- break;
- default:
- pr_err("%s: unknown branch encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, reg);
-}
-
-u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg,
- enum aarch64_insn_register base,
- enum aarch64_insn_register offset,
- enum aarch64_insn_size_type size,
- enum aarch64_insn_ldst_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_LDST_LOAD_REG_OFFSET:
- insn = aarch64_insn_get_ldr_reg_value();
- break;
- case AARCH64_INSN_LDST_STORE_REG_OFFSET:
- insn = aarch64_insn_get_str_reg_value();
- break;
- default:
- pr_err("%s: unknown load/store encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_ldst_size(size, insn);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn, reg);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- base);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn,
- offset);
-}
-
-u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
- enum aarch64_insn_register reg2,
- enum aarch64_insn_register base,
- int offset,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_ldst_type type)
-{
- u32 insn;
- int shift;
-
- switch (type) {
- case AARCH64_INSN_LDST_LOAD_PAIR_PRE_INDEX:
- insn = aarch64_insn_get_ldp_pre_value();
- break;
- case AARCH64_INSN_LDST_STORE_PAIR_PRE_INDEX:
- insn = aarch64_insn_get_stp_pre_value();
- break;
- case AARCH64_INSN_LDST_LOAD_PAIR_POST_INDEX:
- insn = aarch64_insn_get_ldp_post_value();
- break;
- case AARCH64_INSN_LDST_STORE_PAIR_POST_INDEX:
- insn = aarch64_insn_get_stp_post_value();
- break;
- default:
- pr_err("%s: unknown load/store encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- if ((offset & 0x3) || (offset < -256) || (offset > 252)) {
- pr_err("%s: offset must be multiples of 4 in the range of [-256, 252] %d\n",
- __func__, offset);
- return AARCH64_BREAK_FAULT;
- }
- shift = 2;
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- if ((offset & 0x7) || (offset < -512) || (offset > 504)) {
- pr_err("%s: offset must be multiples of 8 in the range of [-512, 504] %d\n",
- __func__, offset);
- return AARCH64_BREAK_FAULT;
- }
- shift = 3;
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
- reg1);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT2, insn,
- reg2);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- base);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_7, insn,
- offset >> shift);
-}
-
-u32 aarch64_insn_gen_load_store_ex(enum aarch64_insn_register reg,
- enum aarch64_insn_register base,
- enum aarch64_insn_register state,
- enum aarch64_insn_size_type size,
- enum aarch64_insn_ldst_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_LDST_LOAD_EX:
- insn = aarch64_insn_get_load_ex_value();
- break;
- case AARCH64_INSN_LDST_STORE_EX:
- insn = aarch64_insn_get_store_ex_value();
- break;
- default:
- pr_err("%s: unknown load/store exclusive encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_ldst_size(size, insn);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
- reg);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- base);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT2, insn,
- AARCH64_INSN_REG_ZR);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RS, insn,
- state);
-}
-
-u32 aarch64_insn_gen_ldadd(enum aarch64_insn_register result,
- enum aarch64_insn_register address,
- enum aarch64_insn_register value,
- enum aarch64_insn_size_type size)
-{
- u32 insn = aarch64_insn_get_ldadd_value();
-
- switch (size) {
- case AARCH64_INSN_SIZE_32:
- case AARCH64_INSN_SIZE_64:
- break;
- default:
- pr_err("%s: unimplemented size encoding %d\n", __func__, size);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_ldst_size(size, insn);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
- result);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- address);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RS, insn,
- value);
-}
-
-u32 aarch64_insn_gen_stadd(enum aarch64_insn_register address,
- enum aarch64_insn_register value,
- enum aarch64_insn_size_type size)
-{
- /*
- * STADD is simply encoded as an alias for LDADD with XZR as
- * the destination register.
- */
- return aarch64_insn_gen_ldadd(AARCH64_INSN_REG_ZR, address,
- value, size);
-}
-
-static u32 aarch64_insn_encode_prfm_imm(enum aarch64_insn_prfm_type type,
- enum aarch64_insn_prfm_target target,
- enum aarch64_insn_prfm_policy policy,
- u32 insn)
-{
- u32 imm_type = 0, imm_target = 0, imm_policy = 0;
-
- switch (type) {
- case AARCH64_INSN_PRFM_TYPE_PLD:
- break;
- case AARCH64_INSN_PRFM_TYPE_PLI:
- imm_type = BIT(0);
- break;
- case AARCH64_INSN_PRFM_TYPE_PST:
- imm_type = BIT(1);
- break;
- default:
- pr_err("%s: unknown prfm type encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (target) {
- case AARCH64_INSN_PRFM_TARGET_L1:
- break;
- case AARCH64_INSN_PRFM_TARGET_L2:
- imm_target = BIT(0);
- break;
- case AARCH64_INSN_PRFM_TARGET_L3:
- imm_target = BIT(1);
- break;
- default:
- pr_err("%s: unknown prfm target encoding %d\n", __func__, target);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (policy) {
- case AARCH64_INSN_PRFM_POLICY_KEEP:
- break;
- case AARCH64_INSN_PRFM_POLICY_STRM:
- imm_policy = BIT(0);
- break;
- default:
- pr_err("%s: unknown prfm policy encoding %d\n", __func__, policy);
- return AARCH64_BREAK_FAULT;
- }
-
- /* In this case, imm5 is encoded into Rt field. */
- insn &= ~GENMASK(4, 0);
- insn |= imm_policy | (imm_target << 1) | (imm_type << 3);
-
- return insn;
-}
-
-u32 aarch64_insn_gen_prefetch(enum aarch64_insn_register base,
- enum aarch64_insn_prfm_type type,
- enum aarch64_insn_prfm_target target,
- enum aarch64_insn_prfm_policy policy)
-{
- u32 insn = aarch64_insn_get_prfm_value();
-
- insn = aarch64_insn_encode_ldst_size(AARCH64_INSN_SIZE_64, insn);
-
- insn = aarch64_insn_encode_prfm_imm(type, target, policy, insn);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- base);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_12, insn, 0);
-}
-
-u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- int imm, enum aarch64_insn_variant variant,
- enum aarch64_insn_adsb_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_ADSB_ADD:
- insn = aarch64_insn_get_add_imm_value();
- break;
- case AARCH64_INSN_ADSB_SUB:
- insn = aarch64_insn_get_sub_imm_value();
- break;
- case AARCH64_INSN_ADSB_ADD_SETFLAGS:
- insn = aarch64_insn_get_adds_imm_value();
- break;
- case AARCH64_INSN_ADSB_SUB_SETFLAGS:
- insn = aarch64_insn_get_subs_imm_value();
- break;
- default:
- pr_err("%s: unknown add/sub encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- /* We can't encode more than a 24bit value (12bit + 12bit shift) */
- if (imm & ~(BIT(24) - 1))
- goto out;
-
- /* If we have something in the top 12 bits... */
- if (imm & ~(SZ_4K - 1)) {
- /* ... and in the low 12 bits -> error */
- if (imm & (SZ_4K - 1))
- goto out;
-
- imm >>= 12;
- insn |= AARCH64_INSN_LSL_12;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_12, insn, imm);
-
-out:
- pr_err("%s: invalid immediate encoding %d\n", __func__, imm);
- return AARCH64_BREAK_FAULT;
-}
-
-u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- int immr, int imms,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_bitfield_type type)
-{
- u32 insn;
- u32 mask;
-
- switch (type) {
- case AARCH64_INSN_BITFIELD_MOVE:
- insn = aarch64_insn_get_bfm_value();
- break;
- case AARCH64_INSN_BITFIELD_MOVE_UNSIGNED:
- insn = aarch64_insn_get_ubfm_value();
- break;
- case AARCH64_INSN_BITFIELD_MOVE_SIGNED:
- insn = aarch64_insn_get_sbfm_value();
- break;
- default:
- pr_err("%s: unknown bitfield encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- mask = GENMASK(4, 0);
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT | AARCH64_INSN_N_BIT;
- mask = GENMASK(5, 0);
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- if (immr & ~mask) {
- pr_err("%s: invalid immr encoding %d\n", __func__, immr);
- return AARCH64_BREAK_FAULT;
- }
- if (imms & ~mask) {
- pr_err("%s: invalid imms encoding %d\n", __func__, imms);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-
- insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_R, insn, immr);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, imms);
-}
-
-u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
- int imm, int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_movewide_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_MOVEWIDE_ZERO:
- insn = aarch64_insn_get_movz_value();
- break;
- case AARCH64_INSN_MOVEWIDE_KEEP:
- insn = aarch64_insn_get_movk_value();
- break;
- case AARCH64_INSN_MOVEWIDE_INVERSE:
- insn = aarch64_insn_get_movn_value();
- break;
- default:
- pr_err("%s: unknown movewide encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- if (imm & ~(SZ_64K - 1)) {
- pr_err("%s: invalid immediate encoding %d\n", __func__, imm);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- if (shift != 0 && shift != 16) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- if (shift != 0 && shift != 16 && shift != 32 && shift != 48) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn |= (shift >> 4) << 21;
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_16, insn, imm);
-}
-
-u32 aarch64_insn_gen_add_sub_shifted_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_adsb_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_ADSB_ADD:
- insn = aarch64_insn_get_add_value();
- break;
- case AARCH64_INSN_ADSB_SUB:
- insn = aarch64_insn_get_sub_value();
- break;
- case AARCH64_INSN_ADSB_ADD_SETFLAGS:
- insn = aarch64_insn_get_adds_value();
- break;
- case AARCH64_INSN_ADSB_SUB_SETFLAGS:
- insn = aarch64_insn_get_subs_value();
- break;
- default:
- pr_err("%s: unknown add/sub encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- if (shift & ~(SZ_32 - 1)) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- if (shift & ~(SZ_64 - 1)) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_6, insn, shift);
-}
-
-u32 aarch64_insn_gen_data1(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data1_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_DATA1_REVERSE_16:
- insn = aarch64_insn_get_rev16_value();
- break;
- case AARCH64_INSN_DATA1_REVERSE_32:
- insn = aarch64_insn_get_rev32_value();
- break;
- case AARCH64_INSN_DATA1_REVERSE_64:
- if (variant != AARCH64_INSN_VARIANT_64BIT) {
- pr_err("%s: invalid variant for reverse64 %d\n",
- __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
- insn = aarch64_insn_get_rev64_value();
- break;
- default:
- pr_err("%s: unknown data1 encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-}
-
-u32 aarch64_insn_gen_data2(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data2_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_DATA2_UDIV:
- insn = aarch64_insn_get_udiv_value();
- break;
- case AARCH64_INSN_DATA2_SDIV:
- insn = aarch64_insn_get_sdiv_value();
- break;
- case AARCH64_INSN_DATA2_LSLV:
- insn = aarch64_insn_get_lslv_value();
- break;
- case AARCH64_INSN_DATA2_LSRV:
- insn = aarch64_insn_get_lsrv_value();
- break;
- case AARCH64_INSN_DATA2_ASRV:
- insn = aarch64_insn_get_asrv_value();
- break;
- case AARCH64_INSN_DATA2_RORV:
- insn = aarch64_insn_get_rorv_value();
- break;
- default:
- pr_err("%s: unknown data2 encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
-}
-
-u32 aarch64_insn_gen_data3(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg1,
- enum aarch64_insn_register reg2,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_data3_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_DATA3_MADD:
- insn = aarch64_insn_get_madd_value();
- break;
- case AARCH64_INSN_DATA3_MSUB:
- insn = aarch64_insn_get_msub_value();
- break;
- default:
- pr_err("%s: unknown data3 encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RA, insn, src);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
- reg1);
-
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn,
- reg2);
-}
-
-u32 aarch64_insn_gen_logical_shifted_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_register reg,
- int shift,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_logic_type type)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_LOGIC_AND:
- insn = aarch64_insn_get_and_value();
- break;
- case AARCH64_INSN_LOGIC_BIC:
- insn = aarch64_insn_get_bic_value();
- break;
- case AARCH64_INSN_LOGIC_ORR:
- insn = aarch64_insn_get_orr_value();
- break;
- case AARCH64_INSN_LOGIC_ORN:
- insn = aarch64_insn_get_orn_value();
- break;
- case AARCH64_INSN_LOGIC_EOR:
- insn = aarch64_insn_get_eor_value();
- break;
- case AARCH64_INSN_LOGIC_EON:
- insn = aarch64_insn_get_eon_value();
- break;
- case AARCH64_INSN_LOGIC_AND_SETFLAGS:
- insn = aarch64_insn_get_ands_value();
- break;
- case AARCH64_INSN_LOGIC_BIC_SETFLAGS:
- insn = aarch64_insn_get_bics_value();
- break;
- default:
- pr_err("%s: unknown logical encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- if (shift & ~(SZ_32 - 1)) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- if (shift & ~(SZ_64 - 1)) {
- pr_err("%s: invalid shift encoding %d\n", __func__,
- shift);
- return AARCH64_BREAK_FAULT;
- }
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_6, insn, shift);
-}
-
-/*
- * MOV (register) is architecturally an alias of ORR (shifted register) where
- * MOV <*d>, <*m> is equivalent to ORR <*d>, <*ZR>, <*m>
- */
-u32 aarch64_insn_gen_move_reg(enum aarch64_insn_register dst,
- enum aarch64_insn_register src,
- enum aarch64_insn_variant variant)
-{
- return aarch64_insn_gen_logical_shifted_reg(dst, AARCH64_INSN_REG_ZR,
- src, 0, variant,
- AARCH64_INSN_LOGIC_ORR);
-}
-
-u32 aarch64_insn_gen_adr(unsigned long pc, unsigned long addr,
- enum aarch64_insn_register reg,
- enum aarch64_insn_adr_type type)
-{
- u32 insn;
- s32 offset;
-
- switch (type) {
- case AARCH64_INSN_ADR_TYPE_ADR:
- insn = aarch64_insn_get_adr_value();
- offset = addr - pc;
- break;
- case AARCH64_INSN_ADR_TYPE_ADRP:
- insn = aarch64_insn_get_adrp_value();
- offset = (addr - ALIGN_DOWN(pc, SZ_4K)) >> 12;
- break;
- default:
- pr_err("%s: unknown adr encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- if (offset < -SZ_1M || offset >= SZ_1M)
- return AARCH64_BREAK_FAULT;
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, reg);
-
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_ADR, insn, offset);
-}
-
-/*
- * Decode the imm field of a branch, and return the byte offset as a
- * signed value (so it can be used when computing a new branch
- * target).
- */
-s32 aarch64_get_branch_offset(u32 insn)
-{
- s32 imm;
-
- if (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn)) {
- imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_26, insn);
- return (imm << 6) >> 4;
- }
-
- if (aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
- aarch64_insn_is_bcond(insn)) {
- imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_19, insn);
- return (imm << 13) >> 11;
- }
-
- if (aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn)) {
- imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_14, insn);
- return (imm << 18) >> 16;
- }
-
- /* Unhandled instruction */
- BUG();
-}
-
-/*
- * Encode the displacement of a branch in the imm field and return the
- * updated instruction.
- */
-u32 aarch64_set_branch_offset(u32 insn, s32 offset)
-{
- if (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn))
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_26, insn,
- offset >> 2);
-
- if (aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
- aarch64_insn_is_bcond(insn))
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
- offset >> 2);
-
- if (aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn))
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_14, insn,
- offset >> 2);
-
- /* Unhandled instruction */
- BUG();
-}
-
-s32 aarch64_insn_adrp_get_offset(u32 insn)
-{
- BUG_ON(!aarch64_insn_is_adrp(insn));
- return aarch64_insn_decode_immediate(AARCH64_INSN_IMM_ADR, insn) << 12;
-}
-
-u32 aarch64_insn_adrp_set_offset(u32 insn, s32 offset)
-{
- BUG_ON(!aarch64_insn_is_adrp(insn));
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_ADR, insn,
- offset >> 12);
-}
-
-/*
- * Extract the Op/CR data from a msr/mrs instruction.
- */
-u32 aarch64_insn_extract_system_reg(u32 insn)
-{
- return (insn & 0x1FFFE0) >> 5;
-}
-
bool aarch32_insn_is_wide(u32 insn)
{
return insn >= 0xe800;
@@ -1529,171 +283,3 @@ pstate_check_t * const aarch32_opcode_cond_checks[16] = {
__check_hi, __check_ls, __check_ge, __check_lt,
__check_gt, __check_le, __check_al, __check_al
};
-
-static bool range_of_ones(u64 val)
-{
- /* Doesn't handle full ones or full zeroes */
- u64 sval = val >> __ffs64(val);
-
- /* One of Sean Eron Anderson's bithack tricks */
- return ((sval + 1) & (sval)) == 0;
-}
-
-static u32 aarch64_encode_immediate(u64 imm,
- enum aarch64_insn_variant variant,
- u32 insn)
-{
- unsigned int immr, imms, n, ones, ror, esz, tmp;
- u64 mask;
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- esz = 32;
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- insn |= AARCH64_INSN_SF_BIT;
- esz = 64;
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- mask = GENMASK(esz - 1, 0);
-
- /* Can't encode full zeroes, full ones, or value wider than the mask */
- if (!imm || imm == mask || imm & ~mask)
- return AARCH64_BREAK_FAULT;
-
- /*
- * Inverse of Replicate(). Try to spot a repeating pattern
- * with a pow2 stride.
- */
- for (tmp = esz / 2; tmp >= 2; tmp /= 2) {
- u64 emask = BIT(tmp) - 1;
-
- if ((imm & emask) != ((imm >> tmp) & emask))
- break;
-
- esz = tmp;
- mask = emask;
- }
-
- /* N is only set if we're encoding a 64bit value */
- n = esz == 64;
-
- /* Trim imm to the element size */
- imm &= mask;
-
- /* That's how many ones we need to encode */
- ones = hweight64(imm);
-
- /*
- * imms is set to (ones - 1), prefixed with a string of ones
- * and a zero if they fit. Cap it to 6 bits.
- */
- imms = ones - 1;
- imms |= 0xf << ffs(esz);
- imms &= BIT(6) - 1;
-
- /* Compute the rotation */
- if (range_of_ones(imm)) {
- /*
- * Pattern: 0..01..10..0
- *
- * Compute how many rotate we need to align it right
- */
- ror = __ffs64(imm);
- } else {
- /*
- * Pattern: 0..01..10..01..1
- *
- * Fill the unused top bits with ones, and check if
- * the result is a valid immediate (all ones with a
- * contiguous ranges of zeroes).
- */
- imm |= ~mask;
- if (!range_of_ones(~imm))
- return AARCH64_BREAK_FAULT;
-
- /*
- * Compute the rotation to get a continuous set of
- * ones, with the first bit set at position 0
- */
- ror = fls(~imm);
- }
-
- /*
- * immr is the number of bits we need to rotate back to the
- * original set of ones. Note that this is relative to the
- * element size...
- */
- immr = (esz - ror) % esz;
-
- insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_N, insn, n);
- insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_R, insn, immr);
- return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, imms);
-}
-
-u32 aarch64_insn_gen_logical_immediate(enum aarch64_insn_logic_type type,
- enum aarch64_insn_variant variant,
- enum aarch64_insn_register Rn,
- enum aarch64_insn_register Rd,
- u64 imm)
-{
- u32 insn;
-
- switch (type) {
- case AARCH64_INSN_LOGIC_AND:
- insn = aarch64_insn_get_and_imm_value();
- break;
- case AARCH64_INSN_LOGIC_ORR:
- insn = aarch64_insn_get_orr_imm_value();
- break;
- case AARCH64_INSN_LOGIC_EOR:
- insn = aarch64_insn_get_eor_imm_value();
- break;
- case AARCH64_INSN_LOGIC_AND_SETFLAGS:
- insn = aarch64_insn_get_ands_imm_value();
- break;
- default:
- pr_err("%s: unknown logical encoding %d\n", __func__, type);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, Rd);
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, Rn);
- return aarch64_encode_immediate(imm, variant, insn);
-}
-
-u32 aarch64_insn_gen_extr(enum aarch64_insn_variant variant,
- enum aarch64_insn_register Rm,
- enum aarch64_insn_register Rn,
- enum aarch64_insn_register Rd,
- u8 lsb)
-{
- u32 insn;
-
- insn = aarch64_insn_get_extr_value();
-
- switch (variant) {
- case AARCH64_INSN_VARIANT_32BIT:
- if (lsb > 31)
- return AARCH64_BREAK_FAULT;
- break;
- case AARCH64_INSN_VARIANT_64BIT:
- if (lsb > 63)
- return AARCH64_BREAK_FAULT;
- insn |= AARCH64_INSN_SF_BIT;
- insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_N, insn, 1);
- break;
- default:
- pr_err("%s: unknown variant encoding %d\n", __func__, variant);
- return AARCH64_BREAK_FAULT;
- }
-
- insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, lsb);
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, Rd);
- insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, Rn);
- return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, Rm);
-}
diff --git a/arch/arm64/lib/Makefile b/arch/arm64/lib/Makefile
index d31e1169d9b8..7945fcdabbd7 100644
--- a/arch/arm64/lib/Makefile
+++ b/arch/arm64/lib/Makefile
@@ -3,7 +3,7 @@ lib-y := clear_user.o delay.o copy_from_user.o \
copy_to_user.o copy_in_user.o copy_page.o \
clear_page.o csum.o memchr.o memcpy.o memmove.o \
memset.o memcmp.o strcmp.o strncmp.o strlen.o \
- strnlen.o strchr.o strrchr.o tishift.o
+ strnlen.o strchr.o strrchr.o tishift.o aarch64-insn.o
ifeq ($(CONFIG_KERNEL_MODE_NEON), y)
obj-$(CONFIG_XOR_BLOCKS) += xor-neon.o
diff --git a/arch/arm64/lib/aarch64-insn.c b/arch/arm64/lib/aarch64-insn.c
new file mode 100644
index 000000000000..df233a7790dc
--- /dev/null
+++ b/arch/arm64/lib/aarch64-insn.c
@@ -0,0 +1,1426 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/printk.h>
+#include <linux/sizes.h>
+#include <linux/types.h>
+
+#include <asm/aarch64-insn.h>
+#include <asm/errno.h>
+#include <asm/kprobes.h>
+
+#define AARCH64_INSN_SF_BIT BIT(31)
+#define AARCH64_INSN_N_BIT BIT(22)
+#define AARCH64_INSN_LSL_12 BIT(22)
+
+static const int aarch64_insn_encoding_class[] = {
+ AARCH64_INSN_CLS_UNKNOWN,
+ AARCH64_INSN_CLS_UNKNOWN,
+ AARCH64_INSN_CLS_UNKNOWN,
+ AARCH64_INSN_CLS_UNKNOWN,
+ AARCH64_INSN_CLS_LDST,
+ AARCH64_INSN_CLS_DP_REG,
+ AARCH64_INSN_CLS_LDST,
+ AARCH64_INSN_CLS_DP_FPSIMD,
+ AARCH64_INSN_CLS_DP_IMM,
+ AARCH64_INSN_CLS_DP_IMM,
+ AARCH64_INSN_CLS_BR_SYS,
+ AARCH64_INSN_CLS_BR_SYS,
+ AARCH64_INSN_CLS_LDST,
+ AARCH64_INSN_CLS_DP_REG,
+ AARCH64_INSN_CLS_LDST,
+ AARCH64_INSN_CLS_DP_FPSIMD,
+};
+
+enum aarch64_insn_encoding_class __kprobes aarch64_get_insn_class(u32 insn)
+{
+ return aarch64_insn_encoding_class[(insn >> 25) & 0xf];
+}
+
+bool __kprobes aarch64_insn_is_steppable_hint(u32 insn)
+{
+ if (!aarch64_insn_is_hint(insn))
+ return false;
+
+ switch (insn & 0xFE0) {
+ case AARCH64_INSN_HINT_XPACLRI:
+ case AARCH64_INSN_HINT_PACIA_1716:
+ case AARCH64_INSN_HINT_PACIB_1716:
+ case AARCH64_INSN_HINT_PACIAZ:
+ case AARCH64_INSN_HINT_PACIASP:
+ case AARCH64_INSN_HINT_PACIBZ:
+ case AARCH64_INSN_HINT_PACIBSP:
+ case AARCH64_INSN_HINT_BTI:
+ case AARCH64_INSN_HINT_BTIC:
+ case AARCH64_INSN_HINT_BTIJ:
+ case AARCH64_INSN_HINT_BTIJC:
+ case AARCH64_INSN_HINT_NOP:
+ return true;
+ default:
+ return false;
+ }
+}
+
+bool aarch64_insn_is_branch_imm(u32 insn)
+{
+ return (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn) ||
+ aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn) ||
+ aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
+ aarch64_insn_is_bcond(insn));
+}
+
+bool __kprobes aarch64_insn_uses_literal(u32 insn)
+{
+ /* ldr/ldrsw (literal), prfm */
+
+ return aarch64_insn_is_ldr_lit(insn) ||
+ aarch64_insn_is_ldrsw_lit(insn) ||
+ aarch64_insn_is_adr_adrp(insn) ||
+ aarch64_insn_is_prfm_lit(insn);
+}
+
+bool __kprobes aarch64_insn_is_branch(u32 insn)
+{
+ /* b, bl, cb*, tb*, ret*, b.cond, br*, blr* */
+
+ return aarch64_insn_is_b(insn) ||
+ aarch64_insn_is_bl(insn) ||
+ aarch64_insn_is_cbz(insn) ||
+ aarch64_insn_is_cbnz(insn) ||
+ aarch64_insn_is_tbz(insn) ||
+ aarch64_insn_is_tbnz(insn) ||
+ aarch64_insn_is_ret(insn) ||
+ aarch64_insn_is_ret_auth(insn) ||
+ aarch64_insn_is_br(insn) ||
+ aarch64_insn_is_br_auth(insn) ||
+ aarch64_insn_is_blr(insn) ||
+ aarch64_insn_is_blr_auth(insn) ||
+ aarch64_insn_is_bcond(insn);
+}
+
+static int __kprobes aarch64_get_imm_shift_mask(enum aarch64_insn_imm_type type,
+ u32 *maskp, int *shiftp)
+{
+ u32 mask;
+ int shift;
+
+ switch (type) {
+ case AARCH64_INSN_IMM_26:
+ mask = BIT(26) - 1;
+ shift = 0;
+ break;
+ case AARCH64_INSN_IMM_19:
+ mask = BIT(19) - 1;
+ shift = 5;
+ break;
+ case AARCH64_INSN_IMM_16:
+ mask = BIT(16) - 1;
+ shift = 5;
+ break;
+ case AARCH64_INSN_IMM_14:
+ mask = BIT(14) - 1;
+ shift = 5;
+ break;
+ case AARCH64_INSN_IMM_12:
+ mask = BIT(12) - 1;
+ shift = 10;
+ break;
+ case AARCH64_INSN_IMM_9:
+ mask = BIT(9) - 1;
+ shift = 12;
+ break;
+ case AARCH64_INSN_IMM_7:
+ mask = BIT(7) - 1;
+ shift = 15;
+ break;
+ case AARCH64_INSN_IMM_6:
+ case AARCH64_INSN_IMM_S:
+ mask = BIT(6) - 1;
+ shift = 10;
+ break;
+ case AARCH64_INSN_IMM_R:
+ mask = BIT(6) - 1;
+ shift = 16;
+ break;
+ case AARCH64_INSN_IMM_N:
+ mask = 1;
+ shift = 22;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *maskp = mask;
+ *shiftp = shift;
+
+ return 0;
+}
+
+#define ADR_IMM_HILOSPLIT 2
+#define ADR_IMM_SIZE SZ_2M
+#define ADR_IMM_LOMASK ((1 << ADR_IMM_HILOSPLIT) - 1)
+#define ADR_IMM_HIMASK ((ADR_IMM_SIZE >> ADR_IMM_HILOSPLIT) - 1)
+#define ADR_IMM_LOSHIFT 29
+#define ADR_IMM_HISHIFT 5
+
+u64 aarch64_insn_decode_immediate(enum aarch64_insn_imm_type type, u32 insn)
+{
+ u32 immlo, immhi, mask;
+ int shift;
+
+ switch (type) {
+ case AARCH64_INSN_IMM_ADR:
+ shift = 0;
+ immlo = (insn >> ADR_IMM_LOSHIFT) & ADR_IMM_LOMASK;
+ immhi = (insn >> ADR_IMM_HISHIFT) & ADR_IMM_HIMASK;
+ insn = (immhi << ADR_IMM_HILOSPLIT) | immlo;
+ mask = ADR_IMM_SIZE - 1;
+ break;
+ default:
+ if (aarch64_get_imm_shift_mask(type, &mask, &shift) < 0) {
+ pr_err("aarch64_insn_decode_immediate: unknown immediate encoding %d\n",
+ type);
+ return 0;
+ }
+ }
+
+ return (insn >> shift) & mask;
+}
+
+u32 __kprobes aarch64_insn_encode_immediate(enum aarch64_insn_imm_type type,
+ u32 insn, u64 imm)
+{
+ u32 immlo, immhi, mask;
+ int shift;
+
+ if (insn == AARCH64_BREAK_FAULT)
+ return AARCH64_BREAK_FAULT;
+
+ switch (type) {
+ case AARCH64_INSN_IMM_ADR:
+ shift = 0;
+ immlo = (imm & ADR_IMM_LOMASK) << ADR_IMM_LOSHIFT;
+ imm >>= ADR_IMM_HILOSPLIT;
+ immhi = (imm & ADR_IMM_HIMASK) << ADR_IMM_HISHIFT;
+ imm = immlo | immhi;
+ mask = ((ADR_IMM_LOMASK << ADR_IMM_LOSHIFT) |
+ (ADR_IMM_HIMASK << ADR_IMM_HISHIFT));
+ break;
+ default:
+ if (aarch64_get_imm_shift_mask(type, &mask, &shift) < 0) {
+ pr_err("aarch64_insn_encode_immediate: unknown immediate encoding %d\n",
+ type);
+ return AARCH64_BREAK_FAULT;
+ }
+ }
+
+ /* Update the immediate field. */
+ insn &= ~(mask << shift);
+ insn |= (imm & mask) << shift;
+
+ return insn;
+}
+
+u32 aarch64_insn_decode_register(enum aarch64_insn_register_type type,
+ u32 insn)
+{
+ int shift;
+
+ switch (type) {
+ case AARCH64_INSN_REGTYPE_RT:
+ case AARCH64_INSN_REGTYPE_RD:
+ shift = 0;
+ break;
+ case AARCH64_INSN_REGTYPE_RN:
+ shift = 5;
+ break;
+ case AARCH64_INSN_REGTYPE_RT2:
+ case AARCH64_INSN_REGTYPE_RA:
+ shift = 10;
+ break;
+ case AARCH64_INSN_REGTYPE_RM:
+ shift = 16;
+ break;
+ default:
+ pr_err("%s: unknown register type encoding %d\n", __func__,
+ type);
+ return 0;
+ }
+
+ return (insn >> shift) & GENMASK(4, 0);
+}
+
+static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type,
+ u32 insn,
+ enum aarch64_insn_register reg)
+{
+ int shift;
+
+ if (insn == AARCH64_BREAK_FAULT)
+ return AARCH64_BREAK_FAULT;
+
+ if (reg < AARCH64_INSN_REG_0 || reg > AARCH64_INSN_REG_SP) {
+ pr_err("%s: unknown register encoding %d\n", __func__, reg);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (type) {
+ case AARCH64_INSN_REGTYPE_RT:
+ case AARCH64_INSN_REGTYPE_RD:
+ shift = 0;
+ break;
+ case AARCH64_INSN_REGTYPE_RN:
+ shift = 5;
+ break;
+ case AARCH64_INSN_REGTYPE_RT2:
+ case AARCH64_INSN_REGTYPE_RA:
+ shift = 10;
+ break;
+ case AARCH64_INSN_REGTYPE_RM:
+ case AARCH64_INSN_REGTYPE_RS:
+ shift = 16;
+ break;
+ default:
+ pr_err("%s: unknown register type encoding %d\n", __func__,
+ type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn &= ~(GENMASK(4, 0) << shift);
+ insn |= reg << shift;
+
+ return insn;
+}
+
+static u32 aarch64_insn_encode_ldst_size(enum aarch64_insn_size_type type,
+ u32 insn)
+{
+ u32 size;
+
+ switch (type) {
+ case AARCH64_INSN_SIZE_8:
+ size = 0;
+ break;
+ case AARCH64_INSN_SIZE_16:
+ size = 1;
+ break;
+ case AARCH64_INSN_SIZE_32:
+ size = 2;
+ break;
+ case AARCH64_INSN_SIZE_64:
+ size = 3;
+ break;
+ default:
+ pr_err("%s: unknown size encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn &= ~GENMASK(31, 30);
+ insn |= size << 30;
+
+ return insn;
+}
+
+static inline long branch_imm_common(unsigned long pc, unsigned long addr,
+ long range)
+{
+ long offset;
+
+ if ((pc & 0x3) || (addr & 0x3)) {
+ pr_err("%s: A64 instructions must be word aligned\n", __func__);
+ return range;
+ }
+
+ offset = ((long)addr - (long)pc);
+
+ if (offset < -range || offset >= range) {
+ pr_err("%s: offset out of range\n", __func__);
+ return range;
+ }
+
+ return offset;
+}
+
+u32 __kprobes aarch64_insn_gen_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_branch_type type)
+{
+ u32 insn;
+ long offset;
+
+ /*
+ * B/BL support [-128M, 128M) offset
+ * ARM64 virtual address arrangement guarantees all kernel and module
+ * texts are within +/-128M.
+ */
+ offset = branch_imm_common(pc, addr, SZ_128M);
+ if (offset >= SZ_128M)
+ return AARCH64_BREAK_FAULT;
+
+ switch (type) {
+ case AARCH64_INSN_BRANCH_LINK:
+ insn = aarch64_insn_get_bl_value();
+ break;
+ case AARCH64_INSN_BRANCH_NOLINK:
+ insn = aarch64_insn_get_b_value();
+ break;
+ default:
+ pr_err("%s: unknown branch encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_26, insn,
+ offset >> 2);
+}
+
+u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_branch_type type)
+{
+ u32 insn;
+ long offset;
+
+ offset = branch_imm_common(pc, addr, SZ_1M);
+ if (offset >= SZ_1M)
+ return AARCH64_BREAK_FAULT;
+
+ switch (type) {
+ case AARCH64_INSN_BRANCH_COMP_ZERO:
+ insn = aarch64_insn_get_cbz_value();
+ break;
+ case AARCH64_INSN_BRANCH_COMP_NONZERO:
+ insn = aarch64_insn_get_cbnz_value();
+ break;
+ default:
+ pr_err("%s: unknown branch encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn, reg);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
+ offset >> 2);
+}
+
+u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_condition cond)
+{
+ u32 insn;
+ long offset;
+
+ offset = branch_imm_common(pc, addr, SZ_1M);
+
+ insn = aarch64_insn_get_bcond_value();
+
+ if (cond < AARCH64_INSN_COND_EQ || cond > AARCH64_INSN_COND_AL) {
+ pr_err("%s: unknown condition encoding %d\n", __func__, cond);
+ return AARCH64_BREAK_FAULT;
+ }
+ insn |= cond;
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
+ offset >> 2);
+}
+
+u32 __kprobes aarch64_insn_gen_hint(enum aarch64_insn_hint_cr_op op)
+{
+ return aarch64_insn_get_hint_value() | op;
+}
+
+u32 __kprobes aarch64_insn_gen_nop(void)
+{
+ return aarch64_insn_gen_hint(AARCH64_INSN_HINT_NOP);
+}
+
+u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg,
+ enum aarch64_insn_branch_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_BRANCH_NOLINK:
+ insn = aarch64_insn_get_br_value();
+ break;
+ case AARCH64_INSN_BRANCH_LINK:
+ insn = aarch64_insn_get_blr_value();
+ break;
+ case AARCH64_INSN_BRANCH_RETURN:
+ insn = aarch64_insn_get_ret_value();
+ break;
+ default:
+ pr_err("%s: unknown branch encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, reg);
+}
+
+u32 aarch64_insn_gen_load_store_reg(enum aarch64_insn_register reg,
+ enum aarch64_insn_register base,
+ enum aarch64_insn_register offset,
+ enum aarch64_insn_size_type size,
+ enum aarch64_insn_ldst_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_LDST_LOAD_REG_OFFSET:
+ insn = aarch64_insn_get_ldr_reg_value();
+ break;
+ case AARCH64_INSN_LDST_STORE_REG_OFFSET:
+ insn = aarch64_insn_get_str_reg_value();
+ break;
+ default:
+ pr_err("%s: unknown load/store encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_ldst_size(size, insn);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn, reg);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ base);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn,
+ offset);
+}
+
+u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
+ enum aarch64_insn_register reg2,
+ enum aarch64_insn_register base,
+ int offset,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_ldst_type type)
+{
+ u32 insn;
+ int shift;
+
+ switch (type) {
+ case AARCH64_INSN_LDST_LOAD_PAIR_PRE_INDEX:
+ insn = aarch64_insn_get_ldp_pre_value();
+ break;
+ case AARCH64_INSN_LDST_STORE_PAIR_PRE_INDEX:
+ insn = aarch64_insn_get_stp_pre_value();
+ break;
+ case AARCH64_INSN_LDST_LOAD_PAIR_POST_INDEX:
+ insn = aarch64_insn_get_ldp_post_value();
+ break;
+ case AARCH64_INSN_LDST_STORE_PAIR_POST_INDEX:
+ insn = aarch64_insn_get_stp_post_value();
+ break;
+ default:
+ pr_err("%s: unknown load/store encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ if ((offset & 0x3) || (offset < -256) || (offset > 252)) {
+ pr_err("%s: offset must be multiples of 4 in the range of [-256, 252] %d\n",
+ __func__, offset);
+ return AARCH64_BREAK_FAULT;
+ }
+ shift = 2;
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ if ((offset & 0x7) || (offset < -512) || (offset > 504)) {
+ pr_err("%s: offset must be multiples of 8 in the range of [-512, 504] %d\n",
+ __func__, offset);
+ return AARCH64_BREAK_FAULT;
+ }
+ shift = 3;
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
+ reg1);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT2, insn,
+ reg2);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ base);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_7, insn,
+ offset >> shift);
+}
+
+u32 aarch64_insn_gen_load_store_ex(enum aarch64_insn_register reg,
+ enum aarch64_insn_register base,
+ enum aarch64_insn_register state,
+ enum aarch64_insn_size_type size,
+ enum aarch64_insn_ldst_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_LDST_LOAD_EX:
+ insn = aarch64_insn_get_load_ex_value();
+ break;
+ case AARCH64_INSN_LDST_STORE_EX:
+ insn = aarch64_insn_get_store_ex_value();
+ break;
+ default:
+ pr_err("%s: unknown load/store exclusive encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_ldst_size(size, insn);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
+ reg);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ base);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT2, insn,
+ AARCH64_INSN_REG_ZR);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RS, insn,
+ state);
+}
+
+u32 aarch64_insn_gen_ldadd(enum aarch64_insn_register result,
+ enum aarch64_insn_register address,
+ enum aarch64_insn_register value,
+ enum aarch64_insn_size_type size)
+{
+ u32 insn = aarch64_insn_get_ldadd_value();
+
+ switch (size) {
+ case AARCH64_INSN_SIZE_32:
+ case AARCH64_INSN_SIZE_64:
+ break;
+ default:
+ pr_err("%s: unimplemented size encoding %d\n", __func__, size);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_ldst_size(size, insn);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RT, insn,
+ result);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ address);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RS, insn,
+ value);
+}
+
+u32 aarch64_insn_gen_stadd(enum aarch64_insn_register address,
+ enum aarch64_insn_register value,
+ enum aarch64_insn_size_type size)
+{
+ /*
+ * STADD is simply encoded as an alias for LDADD with XZR as
+ * the destination register.
+ */
+ return aarch64_insn_gen_ldadd(AARCH64_INSN_REG_ZR, address,
+ value, size);
+}
+
+static u32 aarch64_insn_encode_prfm_imm(enum aarch64_insn_prfm_type type,
+ enum aarch64_insn_prfm_target target,
+ enum aarch64_insn_prfm_policy policy,
+ u32 insn)
+{
+ u32 imm_type = 0, imm_target = 0, imm_policy = 0;
+
+ switch (type) {
+ case AARCH64_INSN_PRFM_TYPE_PLD:
+ break;
+ case AARCH64_INSN_PRFM_TYPE_PLI:
+ imm_type = BIT(0);
+ break;
+ case AARCH64_INSN_PRFM_TYPE_PST:
+ imm_type = BIT(1);
+ break;
+ default:
+ pr_err("%s: unknown prfm type encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (target) {
+ case AARCH64_INSN_PRFM_TARGET_L1:
+ break;
+ case AARCH64_INSN_PRFM_TARGET_L2:
+ imm_target = BIT(0);
+ break;
+ case AARCH64_INSN_PRFM_TARGET_L3:
+ imm_target = BIT(1);
+ break;
+ default:
+ pr_err("%s: unknown prfm target encoding %d\n", __func__, target);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (policy) {
+ case AARCH64_INSN_PRFM_POLICY_KEEP:
+ break;
+ case AARCH64_INSN_PRFM_POLICY_STRM:
+ imm_policy = BIT(0);
+ break;
+ default:
+ pr_err("%s: unknown prfm policy encoding %d\n", __func__, policy);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ /* In this case, imm5 is encoded into Rt field. */
+ insn &= ~GENMASK(4, 0);
+ insn |= imm_policy | (imm_target << 1) | (imm_type << 3);
+
+ return insn;
+}
+
+u32 aarch64_insn_gen_prefetch(enum aarch64_insn_register base,
+ enum aarch64_insn_prfm_type type,
+ enum aarch64_insn_prfm_target target,
+ enum aarch64_insn_prfm_policy policy)
+{
+ u32 insn = aarch64_insn_get_prfm_value();
+
+ insn = aarch64_insn_encode_ldst_size(AARCH64_INSN_SIZE_64, insn);
+
+ insn = aarch64_insn_encode_prfm_imm(type, target, policy, insn);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ base);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_12, insn, 0);
+}
+
+u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int imm, enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_ADSB_ADD:
+ insn = aarch64_insn_get_add_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB:
+ insn = aarch64_insn_get_sub_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_ADD_SETFLAGS:
+ insn = aarch64_insn_get_adds_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB_SETFLAGS:
+ insn = aarch64_insn_get_subs_imm_value();
+ break;
+ default:
+ pr_err("%s: unknown add/sub encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ /* We can't encode more than a 24bit value (12bit + 12bit shift) */
+ if (imm & ~(BIT(24) - 1))
+ goto out;
+
+ /* If we have something in the top 12 bits... */
+ if (imm & ~(SZ_4K - 1)) {
+ /* ... and in the low 12 bits -> error */
+ if (imm & (SZ_4K - 1))
+ goto out;
+
+ imm >>= 12;
+ insn |= AARCH64_INSN_LSL_12;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_12, insn, imm);
+
+out:
+ pr_err("%s: invalid immediate encoding %d\n", __func__, imm);
+ return AARCH64_BREAK_FAULT;
+}
+
+u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int immr, int imms,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_bitfield_type type)
+{
+ u32 insn;
+ u32 mask;
+
+ switch (type) {
+ case AARCH64_INSN_BITFIELD_MOVE:
+ insn = aarch64_insn_get_bfm_value();
+ break;
+ case AARCH64_INSN_BITFIELD_MOVE_UNSIGNED:
+ insn = aarch64_insn_get_ubfm_value();
+ break;
+ case AARCH64_INSN_BITFIELD_MOVE_SIGNED:
+ insn = aarch64_insn_get_sbfm_value();
+ break;
+ default:
+ pr_err("%s: unknown bitfield encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ mask = GENMASK(4, 0);
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT | AARCH64_INSN_N_BIT;
+ mask = GENMASK(5, 0);
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ if (immr & ~mask) {
+ pr_err("%s: invalid immr encoding %d\n", __func__, immr);
+ return AARCH64_BREAK_FAULT;
+ }
+ if (imms & ~mask) {
+ pr_err("%s: invalid imms encoding %d\n", __func__, imms);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_R, insn, immr);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, imms);
+}
+
+u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
+ int imm, int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_movewide_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_MOVEWIDE_ZERO:
+ insn = aarch64_insn_get_movz_value();
+ break;
+ case AARCH64_INSN_MOVEWIDE_KEEP:
+ insn = aarch64_insn_get_movk_value();
+ break;
+ case AARCH64_INSN_MOVEWIDE_INVERSE:
+ insn = aarch64_insn_get_movn_value();
+ break;
+ default:
+ pr_err("%s: unknown movewide encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ if (imm & ~(SZ_64K - 1)) {
+ pr_err("%s: invalid immediate encoding %d\n", __func__, imm);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ if (shift != 0 && shift != 16) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ if (shift != 0 && shift != 16 && shift != 32 && shift != 48) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn |= (shift >> 4) << 21;
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_16, insn, imm);
+}
+
+u32 aarch64_insn_gen_add_sub_shifted_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_ADSB_ADD:
+ insn = aarch64_insn_get_add_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB:
+ insn = aarch64_insn_get_sub_value();
+ break;
+ case AARCH64_INSN_ADSB_ADD_SETFLAGS:
+ insn = aarch64_insn_get_adds_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB_SETFLAGS:
+ insn = aarch64_insn_get_subs_value();
+ break;
+ default:
+ pr_err("%s: unknown add/sub encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ if (shift & ~(SZ_32 - 1)) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ if (shift & ~(SZ_64 - 1)) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_6, insn, shift);
+}
+
+u32 aarch64_insn_gen_data1(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data1_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_DATA1_REVERSE_16:
+ insn = aarch64_insn_get_rev16_value();
+ break;
+ case AARCH64_INSN_DATA1_REVERSE_32:
+ insn = aarch64_insn_get_rev32_value();
+ break;
+ case AARCH64_INSN_DATA1_REVERSE_64:
+ if (variant != AARCH64_INSN_VARIANT_64BIT) {
+ pr_err("%s: invalid variant for reverse64 %d\n",
+ __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+ insn = aarch64_insn_get_rev64_value();
+ break;
+ default:
+ pr_err("%s: unknown data1 encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+}
+
+u32 aarch64_insn_gen_data2(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data2_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_DATA2_UDIV:
+ insn = aarch64_insn_get_udiv_value();
+ break;
+ case AARCH64_INSN_DATA2_SDIV:
+ insn = aarch64_insn_get_sdiv_value();
+ break;
+ case AARCH64_INSN_DATA2_LSLV:
+ insn = aarch64_insn_get_lslv_value();
+ break;
+ case AARCH64_INSN_DATA2_LSRV:
+ insn = aarch64_insn_get_lsrv_value();
+ break;
+ case AARCH64_INSN_DATA2_ASRV:
+ insn = aarch64_insn_get_asrv_value();
+ break;
+ case AARCH64_INSN_DATA2_RORV:
+ insn = aarch64_insn_get_rorv_value();
+ break;
+ default:
+ pr_err("%s: unknown data2 encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
+}
+
+u32 aarch64_insn_gen_data3(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg1,
+ enum aarch64_insn_register reg2,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_data3_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_DATA3_MADD:
+ insn = aarch64_insn_get_madd_value();
+ break;
+ case AARCH64_INSN_DATA3_MSUB:
+ insn = aarch64_insn_get_msub_value();
+ break;
+ default:
+ pr_err("%s: unknown data3 encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RA, insn, src);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn,
+ reg1);
+
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn,
+ reg2);
+}
+
+u32 aarch64_insn_gen_logical_shifted_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_register reg,
+ int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_logic_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_LOGIC_AND:
+ insn = aarch64_insn_get_and_value();
+ break;
+ case AARCH64_INSN_LOGIC_BIC:
+ insn = aarch64_insn_get_bic_value();
+ break;
+ case AARCH64_INSN_LOGIC_ORR:
+ insn = aarch64_insn_get_orr_value();
+ break;
+ case AARCH64_INSN_LOGIC_ORN:
+ insn = aarch64_insn_get_orn_value();
+ break;
+ case AARCH64_INSN_LOGIC_EOR:
+ insn = aarch64_insn_get_eor_value();
+ break;
+ case AARCH64_INSN_LOGIC_EON:
+ insn = aarch64_insn_get_eon_value();
+ break;
+ case AARCH64_INSN_LOGIC_AND_SETFLAGS:
+ insn = aarch64_insn_get_ands_value();
+ break;
+ case AARCH64_INSN_LOGIC_BIC_SETFLAGS:
+ insn = aarch64_insn_get_bics_value();
+ break;
+ default:
+ pr_err("%s: unknown logical encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ if (shift & ~(SZ_32 - 1)) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ if (shift & ~(SZ_64 - 1)) {
+ pr_err("%s: invalid shift encoding %d\n", __func__,
+ shift);
+ return AARCH64_BREAK_FAULT;
+ }
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, reg);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_6, insn, shift);
+}
+
+/*
+ * MOV (register) is architecturally an alias of ORR (shifted register) where
+ * MOV <*d>, <*m> is equivalent to ORR <*d>, <*ZR>, <*m>
+ */
+u32 aarch64_insn_gen_move_reg(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ enum aarch64_insn_variant variant)
+{
+ return aarch64_insn_gen_logical_shifted_reg(dst, AARCH64_INSN_REG_ZR,
+ src, 0, variant,
+ AARCH64_INSN_LOGIC_ORR);
+}
+
+u32 aarch64_insn_gen_adr(unsigned long pc, unsigned long addr,
+ enum aarch64_insn_register reg,
+ enum aarch64_insn_adr_type type)
+{
+ u32 insn;
+ s32 offset;
+
+ switch (type) {
+ case AARCH64_INSN_ADR_TYPE_ADR:
+ insn = aarch64_insn_get_adr_value();
+ offset = addr - pc;
+ break;
+ case AARCH64_INSN_ADR_TYPE_ADRP:
+ insn = aarch64_insn_get_adrp_value();
+ offset = (addr - ALIGN_DOWN(pc, SZ_4K)) >> 12;
+ break;
+ default:
+ pr_err("%s: unknown adr encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ if (offset < -SZ_1M || offset >= SZ_1M)
+ return AARCH64_BREAK_FAULT;
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, reg);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_ADR, insn, offset);
+}
+
+/*
+ * Decode the imm field of a branch, and return the byte offset as a
+ * signed value (so it can be used when computing a new branch
+ * target).
+ */
+s32 aarch64_get_branch_offset(u32 insn)
+{
+ s32 imm;
+
+ if (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn)) {
+ imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_26, insn);
+ return (imm << 6) >> 4;
+ }
+
+ if (aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
+ aarch64_insn_is_bcond(insn)) {
+ imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_19, insn);
+ return (imm << 13) >> 11;
+ }
+
+ if (aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn)) {
+ imm = aarch64_insn_decode_immediate(AARCH64_INSN_IMM_14, insn);
+ return (imm << 18) >> 16;
+ }
+
+ /* Unhandled instruction */
+ BUG();
+}
+
+/*
+ * Encode the displacement of a branch in the imm field and return the
+ * updated instruction.
+ */
+u32 aarch64_set_branch_offset(u32 insn, s32 offset)
+{
+ if (aarch64_insn_is_b(insn) || aarch64_insn_is_bl(insn))
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_26, insn,
+ offset >> 2);
+
+ if (aarch64_insn_is_cbz(insn) || aarch64_insn_is_cbnz(insn) ||
+ aarch64_insn_is_bcond(insn))
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn,
+ offset >> 2);
+
+ if (aarch64_insn_is_tbz(insn) || aarch64_insn_is_tbnz(insn))
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_14, insn,
+ offset >> 2);
+
+ /* Unhandled instruction */
+ BUG();
+}
+
+s32 aarch64_insn_adrp_get_offset(u32 insn)
+{
+ BUG_ON(!aarch64_insn_is_adrp(insn));
+ return aarch64_insn_decode_immediate(AARCH64_INSN_IMM_ADR, insn) << 12;
+}
+
+u32 aarch64_insn_adrp_set_offset(u32 insn, s32 offset)
+{
+ BUG_ON(!aarch64_insn_is_adrp(insn));
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_ADR, insn,
+ offset >> 12);
+}
+
+/*
+ * Extract the Op/CR data from a msr/mrs instruction.
+ */
+u32 aarch64_insn_extract_system_reg(u32 insn)
+{
+ return (insn & 0x1FFFE0) >> 5;
+}
+
+static bool range_of_ones(u64 val)
+{
+ /* Doesn't handle full ones or full zeroes */
+ u64 sval = val >> __ffs64(val);
+
+ /* One of Sean Eron Anderson's bithack tricks */
+ return ((sval + 1) & (sval)) == 0;
+}
+
+static u32 aarch64_encode_immediate(u64 imm,
+ enum aarch64_insn_variant variant,
+ u32 insn)
+{
+ unsigned int immr, imms, n, ones, ror, esz, tmp;
+ u64 mask;
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ esz = 32;
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ esz = 64;
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ mask = GENMASK(esz - 1, 0);
+
+ /* Can't encode full zeroes, full ones, or value wider than the mask */
+ if (!imm || imm == mask || imm & ~mask)
+ return AARCH64_BREAK_FAULT;
+
+ /*
+ * Inverse of Replicate(). Try to spot a repeating pattern
+ * with a pow2 stride.
+ */
+ for (tmp = esz / 2; tmp >= 2; tmp /= 2) {
+ u64 emask = BIT(tmp) - 1;
+
+ if ((imm & emask) != ((imm >> tmp) & emask))
+ break;
+
+ esz = tmp;
+ mask = emask;
+ }
+
+ /* N is only set if we're encoding a 64bit value */
+ n = esz == 64;
+
+ /* Trim imm to the element size */
+ imm &= mask;
+
+ /* That's how many ones we need to encode */
+ ones = hweight64(imm);
+
+ /*
+ * imms is set to (ones - 1), prefixed with a string of ones
+ * and a zero if they fit. Cap it to 6 bits.
+ */
+ imms = ones - 1;
+ imms |= 0xf << ffs(esz);
+ imms &= BIT(6) - 1;
+
+ /* Compute the rotation */
+ if (range_of_ones(imm)) {
+ /*
+ * Pattern: 0..01..10..0
+ *
+ * Compute how many rotate we need to align it right
+ */
+ ror = __ffs64(imm);
+ } else {
+ /*
+ * Pattern: 0..01..10..01..1
+ *
+ * Fill the unused top bits with ones, and check if
+ * the result is a valid immediate (all ones with a
+ * contiguous ranges of zeroes).
+ */
+ imm |= ~mask;
+ if (!range_of_ones(~imm))
+ return AARCH64_BREAK_FAULT;
+
+ /*
+ * Compute the rotation to get a continuous set of
+ * ones, with the first bit set at position 0
+ */
+ ror = fls(~imm);
+ }
+
+ /*
+ * immr is the number of bits we need to rotate back to the
+ * original set of ones. Note that this is relative to the
+ * element size...
+ */
+ immr = (esz - ror) % esz;
+
+ insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_N, insn, n);
+ insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_R, insn, immr);
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, imms);
+}
+
+u32 aarch64_insn_gen_logical_immediate(enum aarch64_insn_logic_type type,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_register Rn,
+ enum aarch64_insn_register Rd,
+ u64 imm)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_LOGIC_AND:
+ insn = aarch64_insn_get_and_imm_value();
+ break;
+ case AARCH64_INSN_LOGIC_ORR:
+ insn = aarch64_insn_get_orr_imm_value();
+ break;
+ case AARCH64_INSN_LOGIC_EOR:
+ insn = aarch64_insn_get_eor_imm_value();
+ break;
+ case AARCH64_INSN_LOGIC_AND_SETFLAGS:
+ insn = aarch64_insn_get_ands_imm_value();
+ break;
+ default:
+ pr_err("%s: unknown logical encoding %d\n", __func__, type);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, Rd);
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, Rn);
+ return aarch64_encode_immediate(imm, variant, insn);
+}
+
+u32 aarch64_insn_gen_extr(enum aarch64_insn_variant variant,
+ enum aarch64_insn_register Rm,
+ enum aarch64_insn_register Rn,
+ enum aarch64_insn_register Rd,
+ u8 lsb)
+{
+ u32 insn;
+
+ insn = aarch64_insn_get_extr_value();
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ if (lsb > 31)
+ return AARCH64_BREAK_FAULT;
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ if (lsb > 63)
+ return AARCH64_BREAK_FAULT;
+ insn |= AARCH64_INSN_SF_BIT;
+ insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_N, insn, 1);
+ break;
+ default:
+ pr_err("%s: unknown variant encoding %d\n", __func__, variant);
+ return AARCH64_BREAK_FAULT;
+ }
+
+ insn = aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, lsb);
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, Rd);
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, Rn);
+ return aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RM, insn, Rm);
+}
--
2.25.4
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