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Date: Tue, 28 Apr 2020 21:11:14 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: jpoimboe@...hat.com, alexandre.chartre@...cle.com
Cc: linux-kernel@...r.kernel.org, jthierry@...hat.com,
tglx@...utronix.de, x86@...nel.org, mbenes@...e.cz,
peterz@...radead.org
Subject: [PATCH v2 13/14] x86: Change {JMP,CALL}_NOSPEC argument
In order to change the {JMP,CALL}_NOSPEC macros to call out-of-line
versions of the retpoline magic, we need to remove the '%' from the
argument, such that we can paste it onto symbol names.
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
arch/x86/crypto/aesni-intel_asm.S | 4 ++--
arch/x86/crypto/camellia-aesni-avx-asm_64.S | 2 +-
arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 2 +-
arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 26 +++++++++++++-------------
arch/x86/entry/entry_32.S | 6 +++---
arch/x86/entry/entry_64.S | 2 +-
arch/x86/include/asm/nospec-branch.h | 16 ++++++++--------
arch/x86/kernel/ftrace_32.S | 2 +-
arch/x86/kernel/ftrace_64.S | 4 ++--
arch/x86/lib/checksum_32.S | 4 ++--
arch/x86/platform/efi/efi_stub_64.S | 2 +-
11 files changed, 35 insertions(+), 35 deletions(-)
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -2758,7 +2758,7 @@ SYM_FUNC_START(aesni_xts_crypt8)
pxor INC, STATE4
movdqu IV, 0x30(OUTP)
- CALL_NOSPEC %r11
+ CALL_NOSPEC r11
movdqu 0x00(OUTP), INC
pxor INC, STATE1
@@ -2803,7 +2803,7 @@ SYM_FUNC_START(aesni_xts_crypt8)
_aesni_gf128mul_x_ble()
movups IV, (IVP)
- CALL_NOSPEC %r11
+ CALL_NOSPEC r11
movdqu 0x40(OUTP), INC
pxor INC, STATE1
--- a/arch/x86/crypto/camellia-aesni-avx-asm_64.S
+++ b/arch/x86/crypto/camellia-aesni-avx-asm_64.S
@@ -1228,7 +1228,7 @@ SYM_FUNC_START_LOCAL(camellia_xts_crypt_
vpxor 14 * 16(%rax), %xmm15, %xmm14;
vpxor 15 * 16(%rax), %xmm15, %xmm15;
- CALL_NOSPEC %r9;
+ CALL_NOSPEC r9;
addq $(16 * 16), %rsp;
--- a/arch/x86/crypto/camellia-aesni-avx2-asm_64.S
+++ b/arch/x86/crypto/camellia-aesni-avx2-asm_64.S
@@ -1339,7 +1339,7 @@ SYM_FUNC_START_LOCAL(camellia_xts_crypt_
vpxor 14 * 32(%rax), %ymm15, %ymm14;
vpxor 15 * 32(%rax), %ymm15, %ymm15;
- CALL_NOSPEC %r9;
+ CALL_NOSPEC r9;
addq $(16 * 32), %rsp;
--- a/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
+++ b/arch/x86/crypto/crc32c-pcl-intel-asm_64.S
@@ -75,7 +75,7 @@
.text
SYM_FUNC_START(crc_pcl)
-#define bufp %rdi
+#define bufp rdi
#define bufp_dw %edi
#define bufp_w %di
#define bufp_b %dil
@@ -105,9 +105,9 @@ SYM_FUNC_START(crc_pcl)
## 1) ALIGN:
################################################################
- mov bufp, bufptmp # rdi = *buf
- neg bufp
- and $7, bufp # calculate the unalignment amount of
+ mov %bufp, bufptmp # rdi = *buf
+ neg %bufp
+ and $7, %bufp # calculate the unalignment amount of
# the address
je proc_block # Skip if aligned
@@ -123,13 +123,13 @@ SYM_FUNC_START(crc_pcl)
do_align:
#### Calculate CRC of unaligned bytes of the buffer (if any)
movq (bufptmp), tmp # load a quadward from the buffer
- add bufp, bufptmp # align buffer pointer for quadword
+ add %bufp, bufptmp # align buffer pointer for quadword
# processing
- sub bufp, len # update buffer length
+ sub %bufp, len # update buffer length
align_loop:
crc32b %bl, crc_init_dw # compute crc32 of 1-byte
shr $8, tmp # get next byte
- dec bufp
+ dec %bufp
jne align_loop
proc_block:
@@ -169,10 +169,10 @@ SYM_FUNC_START(crc_pcl)
xor crc2, crc2
## branch into array
- lea jump_table(%rip), bufp
- movzxw (bufp, %rax, 2), len
- lea crc_array(%rip), bufp
- lea (bufp, len, 1), bufp
+ lea jump_table(%rip), %bufp
+ movzxw (%bufp, %rax, 2), len
+ lea crc_array(%rip), %bufp
+ lea (%bufp, len, 1), %bufp
JMP_NOSPEC bufp
################################################################
@@ -218,9 +218,9 @@ LABEL crc_ %i
## 4) Combine three results:
################################################################
- lea (K_table-8)(%rip), bufp # first entry is for idx 1
+ lea (K_table-8)(%rip), %bufp # first entry is for idx 1
shlq $3, %rax # rax *= 8
- pmovzxdq (bufp,%rax), %xmm0 # 2 consts: K1:K2
+ pmovzxdq (%bufp,%rax), %xmm0 # 2 consts: K1:K2
leal (%eax,%eax,2), %eax # rax *= 3 (total *24)
subq %rax, tmp # tmp -= rax*24
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -816,7 +816,7 @@ SYM_CODE_START(ret_from_fork)
/* kernel thread */
1: movl %edi, %eax
- CALL_NOSPEC %ebx
+ CALL_NOSPEC ebx
/*
* A kernel thread is allowed to return here after successfully
* calling do_execve(). Exit to userspace to complete the execve()
@@ -1501,7 +1501,7 @@ SYM_CODE_START_LOCAL_NOALIGN(common_exce
TRACE_IRQS_OFF
movl %esp, %eax # pt_regs pointer
- CALL_NOSPEC %edi
+ CALL_NOSPEC edi
jmp ret_from_exception
SYM_CODE_END(common_exception_read_cr2)
@@ -1522,7 +1522,7 @@ SYM_CODE_START_LOCAL_NOALIGN(common_exce
TRACE_IRQS_OFF
movl %esp, %eax # pt_regs pointer
- CALL_NOSPEC %edi
+ CALL_NOSPEC edi
jmp ret_from_exception
SYM_CODE_END(common_exception)
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -349,7 +349,7 @@ SYM_CODE_START(ret_from_fork)
/* kernel thread */
UNWIND_HINT_EMPTY
movq %r12, %rdi
- CALL_NOSPEC %rbx
+ CALL_NOSPEC rbx
/*
* A kernel thread is allowed to return here after successfully
* calling do_execve(). Exit to userspace to complete the execve()
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -118,22 +118,22 @@
.macro JMP_NOSPEC reg:req
#ifdef CONFIG_RETPOLINE
ANNOTATE_NOSPEC_ALTERNATIVE
- ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; jmp *\reg), \
- __stringify(RETPOLINE_JMP \reg), X86_FEATURE_RETPOLINE, \
- __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; jmp *\reg), X86_FEATURE_RETPOLINE_AMD
+ ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; jmp *%\reg), \
+ __stringify(RETPOLINE_JMP %\reg), X86_FEATURE_RETPOLINE,\
+ __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; jmp *%\reg), X86_FEATURE_RETPOLINE_AMD
#else
- jmp *\reg
+ jmp *%\reg
#endif
.endm
.macro CALL_NOSPEC reg:req
#ifdef CONFIG_RETPOLINE
ANNOTATE_NOSPEC_ALTERNATIVE
- ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; call *\reg), \
- __stringify(RETPOLINE_CALL \reg), X86_FEATURE_RETPOLINE,\
- __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; call *\reg), X86_FEATURE_RETPOLINE_AMD
+ ALTERNATIVE_2 __stringify(ANNOTATE_RETPOLINE_SAFE; call *%\reg),\
+ __stringify(RETPOLINE_CALL %\reg), X86_FEATURE_RETPOLINE,\
+ __stringify(lfence; ANNOTATE_RETPOLINE_SAFE; call *%\reg), X86_FEATURE_RETPOLINE_AMD
#else
- call *\reg
+ call *%\reg
#endif
.endm
--- a/arch/x86/kernel/ftrace_32.S
+++ b/arch/x86/kernel/ftrace_32.S
@@ -189,5 +189,5 @@ SYM_CODE_END(ftrace_graph_caller)
movl %eax, %ecx
popl %edx
popl %eax
- JMP_NOSPEC %ecx
+ JMP_NOSPEC ecx
#endif
--- a/arch/x86/kernel/ftrace_64.S
+++ b/arch/x86/kernel/ftrace_64.S
@@ -301,7 +301,7 @@ SYM_INNER_LABEL(ftrace_stub, SYM_L_GLOBA
* function tracing is enabled.
*/
movq ftrace_trace_function, %r8
- CALL_NOSPEC %r8
+ CALL_NOSPEC r8
restore_mcount_regs
jmp fgraph_trace
@@ -338,6 +338,6 @@ SYM_CODE_START(return_to_handler)
movq 8(%rsp), %rdx
movq (%rsp), %rax
addq $24, %rsp
- JMP_NOSPEC %rdi
+ JMP_NOSPEC rdi
SYM_CODE_END(return_to_handler)
#endif
--- a/arch/x86/lib/checksum_32.S
+++ b/arch/x86/lib/checksum_32.S
@@ -153,7 +153,7 @@ SYM_FUNC_START(csum_partial)
negl %ebx
lea 45f(%ebx,%ebx,2), %ebx
testl %esi, %esi
- JMP_NOSPEC %ebx
+ JMP_NOSPEC ebx
# Handle 2-byte-aligned regions
20: addw (%esi), %ax
@@ -436,7 +436,7 @@ SYM_FUNC_START(csum_partial_copy_generic
andl $-32,%edx
lea 3f(%ebx,%ebx), %ebx
testl %esi, %esi
- JMP_NOSPEC %ebx
+ JMP_NOSPEC ebx
1: addl $64,%esi
addl $64,%edi
SRC(movb -32(%edx),%bl) ; SRC(movb (%edx),%bl)
--- a/arch/x86/platform/efi/efi_stub_64.S
+++ b/arch/x86/platform/efi/efi_stub_64.S
@@ -21,7 +21,7 @@ SYM_FUNC_START(__efi_call)
mov %r8, %r9
mov %rcx, %r8
mov %rsi, %rcx
- CALL_NOSPEC %rdi
+ CALL_NOSPEC rdi
leave
ret
SYM_FUNC_END(__efi_call)
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