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Message-ID: <lsq.1520823972.28219259@decadent.org.uk>
Date: Mon, 12 Mar 2018 03:06:12 +0000
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org,
"Arjan van de Ven" <arjan@...ux.intel.com>,
"Rik van Riel" <riel@...hat.com>,
"Kees Cook" <keescook@...gle.com>,
"Dave Hansen" <dave.hansen@...el.com>,
"Greg Kroah-Hartman" <gregkh@...ux-foundation.org>,
"David Woodhouse" <dwmw@...zon.co.uk>,
"Jiri Kosina" <jikos@...nel.org>, thomas.lendacky@....com,
"Ingo Molnar" <mingo@...nel.org>,
"Thomas Gleixner" <tglx@...utronix.de>, gnomes@...rguk.ukuu.org.uk,
"Andy Lutomirski" <luto@...capital.net>,
"Peter Zijlstra" <peterz@...radead.org>,
"Josh Poimboeuf" <jpoimboe@...hat.com>,
"Tim Chen" <tim.c.chen@...ux.intel.com>,
"Paul Turner" <pjt@...gle.com>, "Andi Kleen" <ak@...ux.intel.com>,
"Linus Torvalds" <torvalds@...ux-foundation.org>
Subject: [PATCH 3.16 25/76] x86/retpoline/crypto: Convert crypto assembler
indirect jumps
3.16.56-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: David Woodhouse <dwmw@...zon.co.uk>
commit 9697fa39efd3fc3692f2949d4045f393ec58450b upstream.
Convert all indirect jumps in crypto assembler code to use non-speculative
sequences when CONFIG_RETPOLINE is enabled.
Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: Arjan van de Ven <arjan@...ux.intel.com>
Acked-by: Ingo Molnar <mingo@...nel.org>
Cc: gnomes@...rguk.ukuu.org.uk
Cc: Rik van Riel <riel@...hat.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: thomas.lendacky@....com
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Jiri Kosina <jikos@...nel.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Kees Cook <keescook@...gle.com>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@...ux-foundation.org>
Cc: Paul Turner <pjt@...gle.com>
Link: https://lkml.kernel.org/r/1515707194-20531-6-git-send-email-dwmw@amazon.co.uk
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
arch/x86/crypto/aesni-intel_asm.S | 5 +++--
arch/x86/crypto/camellia-aesni-avx-asm_64.S | 3 ++-
arch/x86/crypto/camellia-aesni-avx2-asm_64.S | 3 ++-
arch/x86/crypto/crc32c-pcl-intel-asm_64.S | 3 ++-
4 files changed, 9 insertions(+), 5 deletions(-)
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -31,6 +31,7 @@
#include <linux/linkage.h>
#include <asm/inst.h>
+#include <asm/nospec-branch.h>
#ifdef __x86_64__
.data
@@ -2703,7 +2704,7 @@ ENTRY(aesni_xts_crypt8)
pxor INC, STATE4
movdqu IV, 0x30(OUTP)
- call *%r11
+ CALL_NOSPEC %r11
movdqu 0x00(OUTP), INC
pxor INC, STATE1
@@ -2748,7 +2749,7 @@ ENTRY(aesni_xts_crypt8)
_aesni_gf128mul_x_ble()
movups IV, (IVP)
- call *%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
@@ -16,6 +16,7 @@
*/
#include <linux/linkage.h>
+#include <asm/nospec-branch.h>
#define CAMELLIA_TABLE_BYTE_LEN 272
@@ -1210,7 +1211,7 @@ camellia_xts_crypt_16way:
vpxor 14 * 16(%rax), %xmm15, %xmm14;
vpxor 15 * 16(%rax), %xmm15, %xmm15;
- call *%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
@@ -11,6 +11,7 @@
*/
#include <linux/linkage.h>
+#include <asm/nospec-branch.h>
#define CAMELLIA_TABLE_BYTE_LEN 272
@@ -1323,7 +1324,7 @@ camellia_xts_crypt_32way:
vpxor 14 * 32(%rax), %ymm15, %ymm14;
vpxor 15 * 32(%rax), %ymm15, %ymm15;
- call *%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
@@ -45,6 +45,7 @@
#include <asm/inst.h>
#include <linux/linkage.h>
+#include <asm/nospec-branch.h>
## ISCSI CRC 32 Implementation with crc32 and pclmulqdq Instruction
@@ -171,7 +172,7 @@ continue_block:
movzxw (bufp, %rax, 2), len
offset=crc_array-jump_table
lea offset(bufp, len, 1), bufp
- jmp *bufp
+ JMP_NOSPEC bufp
################################################################
## 2a) PROCESS FULL BLOCKS:
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