LKML Archive on lore.kernel.org
 help / Atom feed
* [PATCH v2] x86/speculation: Add RETPOLINE_AMD support to the inline-asm CALL_NOSPEC
@ 2018-09-18 14:45 Zhenzhong Duan
  2018-09-24 15:03 ` [tip:x86/pti] x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant tip-bot for Zhenzhong Duan
  0 siblings, 1 reply; 2+ messages in thread
From: Zhenzhong Duan @ 2018-09-18 14:45 UTC (permalink / raw)
  To: linux-kernel
  Cc: mingo, dhaval.giani, konrad.wilk, x86, tglx, dwmw, bp,
	srinivas.eeda, hpa

..so that they match the asm CALL_NOSPEC.

Add the missing ANNOTATE_NOSPEC_ALTERNATIVE in CALL_NOSPEC.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
---
 arch/x86/include/asm/nospec-branch.h |   17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index b5b6f8c..b0e80e0 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -170,11 +170,15 @@
  */
 # define CALL_NOSPEC						\
 	ANNOTATE_NOSPEC_ALTERNATIVE				\
-	ALTERNATIVE(						\
+	ALTERNATIVE_2(						\
 	ANNOTATE_RETPOLINE_SAFE					\
 	"call *%[thunk_target]\n",				\
 	"call __x86_indirect_thunk_%V[thunk_target]\n",		\
-	X86_FEATURE_RETPOLINE)
+	X86_FEATURE_RETPOLINE,					\
+	"lfence;\n"						\
+	ANNOTATE_RETPOLINE_SAFE					\
+	"call *%[thunk_target]\n",				\
+	X86_FEATURE_RETPOLINE_AMD)
 # define THUNK_TARGET(addr) [thunk_target] "r" (addr)
 
 #elif defined(CONFIG_X86_32) && defined(CONFIG_RETPOLINE)
@@ -184,7 +188,8 @@
  * here, anyway.
  */
 # define CALL_NOSPEC						\
-	ALTERNATIVE(						\
+	ANNOTATE_NOSPEC_ALTERNATIVE				\
+	ALTERNATIVE_2(						\
 	ANNOTATE_RETPOLINE_SAFE					\
 	"call *%[thunk_target]\n",				\
 	"       jmp    904f;\n"					\
@@ -199,7 +204,11 @@
 	"       ret;\n"						\
 	"       .align 16\n"					\
 	"904:	call   901b;\n",				\
-	X86_FEATURE_RETPOLINE)
+	X86_FEATURE_RETPOLINE,					\
+	"lfence;\n"						\
+	ANNOTATE_RETPOLINE_SAFE					\
+	"call *%[thunk_target]\n",				\
+	X86_FEATURE_RETPOLINE_AMD)
 
 # define THUNK_TARGET(addr) [thunk_target] "rm" (addr)
 #else /* No retpoline for C / inline asm */
-- 
1.7.3

^ permalink raw reply	[flat|nested] 2+ messages in thread

* [tip:x86/pti] x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant
  2018-09-18 14:45 [PATCH v2] x86/speculation: Add RETPOLINE_AMD support to the inline-asm CALL_NOSPEC Zhenzhong Duan
@ 2018-09-24 15:03 ` tip-bot for Zhenzhong Duan
  0 siblings, 0 replies; 2+ messages in thread
From: tip-bot for Zhenzhong Duan @ 2018-09-24 15:03 UTC (permalink / raw)
  To: linux-tip-commits
  Cc: daniel, zhenzhong.duan, mingo, udknight, hpa, linux-kernel,
	peterz, tglx, bp, konrad.wilk, mingo, dwmw

Commit-ID:  0cbb76d6285794f30953bfa3ab831714b59dd700
Gitweb:     https://git.kernel.org/tip/0cbb76d6285794f30953bfa3ab831714b59dd700
Author:     Zhenzhong Duan <zhenzhong.duan@oracle.com>
AuthorDate: Tue, 18 Sep 2018 07:45:00 -0700
Committer:  Borislav Petkov <bp@suse.de>
CommitDate: Sun, 23 Sep 2018 15:25:28 +0200

x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant

..so that they match their asm counterpart.

Add the missing ANNOTATE_NOSPEC_ALTERNATIVE in CALL_NOSPEC, while at it.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang YanQing <udknight@gmail.com>
Cc: dhaval.giani@oracle.com
Cc: srinivas.eeda@oracle.com
Link: http://lkml.kernel.org/r/c3975665-173e-4d70-8dee-06c926ac26ee@default
---
 arch/x86/include/asm/nospec-branch.h | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index fd2a8c1b88bc..80dc14422495 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -170,11 +170,15 @@
  */
 # define CALL_NOSPEC						\
 	ANNOTATE_NOSPEC_ALTERNATIVE				\
-	ALTERNATIVE(						\
+	ALTERNATIVE_2(						\
 	ANNOTATE_RETPOLINE_SAFE					\
 	"call *%[thunk_target]\n",				\
 	"call __x86_indirect_thunk_%V[thunk_target]\n",		\
-	X86_FEATURE_RETPOLINE)
+	X86_FEATURE_RETPOLINE,					\
+	"lfence;\n"						\
+	ANNOTATE_RETPOLINE_SAFE					\
+	"call *%[thunk_target]\n",				\
+	X86_FEATURE_RETPOLINE_AMD)
 # define THUNK_TARGET(addr) [thunk_target] "r" (addr)
 
 #elif defined(CONFIG_X86_32) && defined(CONFIG_RETPOLINE)
@@ -184,7 +188,8 @@
  * here, anyway.
  */
 # define CALL_NOSPEC						\
-	ALTERNATIVE(						\
+	ANNOTATE_NOSPEC_ALTERNATIVE				\
+	ALTERNATIVE_2(						\
 	ANNOTATE_RETPOLINE_SAFE					\
 	"call *%[thunk_target]\n",				\
 	"       jmp    904f;\n"					\
@@ -199,7 +204,11 @@
 	"       ret;\n"						\
 	"       .align 16\n"					\
 	"904:	call   901b;\n",				\
-	X86_FEATURE_RETPOLINE)
+	X86_FEATURE_RETPOLINE,					\
+	"lfence;\n"						\
+	ANNOTATE_RETPOLINE_SAFE					\
+	"call *%[thunk_target]\n",				\
+	X86_FEATURE_RETPOLINE_AMD)
 
 # define THUNK_TARGET(addr) [thunk_target] "rm" (addr)
 #else /* No retpoline for C / inline asm */

^ permalink raw reply	[flat|nested] 2+ messages in thread

end of thread, back to index

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-09-18 14:45 [PATCH v2] x86/speculation: Add RETPOLINE_AMD support to the inline-asm CALL_NOSPEC Zhenzhong Duan
2018-09-24 15:03 ` [tip:x86/pti] x86/speculation: Add RETPOLINE_AMD support to the inline asm CALL_NOSPEC variant tip-bot for Zhenzhong Duan

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org linux-kernel@archiver.kernel.org
	public-inbox-index lkml


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/ public-inbox