From: Zhenzhong Duan <zhenzhong.duan@oracle.com> To: <linux-kernel@vger.kernel.org> Cc: <mingo@redhat.com>, <dhaval.giani@oracle.com>, <konrad.wilk@oracle.com>, <x86@kernel.org>, <tglx@linutronix.de>, <dwmw@amazon.co.uk>, <bp@suse.de>, <srinivas.eeda@oracle.com>, <hpa@zytor.com> Subject: [PATCH v2] x86/speculation: Add RETPOLINE_AMD support to the inline-asm CALL_NOSPEC Date: Tue, 18 Sep 2018 07:45:00 -0700 (PDT) Message-ID: <c3975665-173e-4d70-8dee-06c926ac26ee@default> (raw) ..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
next reply index Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-09-18 14:45 Zhenzhong Duan [this message] 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
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