linux-kernel - [PATCH] x86/cpufeature, kvm/svm: Shorten virtualized VMLOAD/VMSAVE flag

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Date:   Tue, 1 Aug 2017 17:56:18 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Janakarajan Natarajan <Janakarajan.Natarajan@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        x86-ml <x86@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>, kvm-ML <kvm@...r.kernel.org>,
        Jörg Rödel <joro@...tes.org>
Subject: [PATCH] x86/cpufeature, kvm/svm: Shorten virtualized VMLOAD/VMSAVE
 flag

Folks,

in the future, please CC people from the output of
scripts/get_maintainer.pl when touching cpufeatures.h. AFAICT, not even
lkml was CCed, not to mention the mandatory x86@...nel.org for x86
patches.

@tip people: this needs to go to urgent so that it gets corrected before
4.13 releases.

Thanks.

---
From: Borislav Petkov <bp@...e.de>
Subject: [PATCH] x86/cpufeature, kvm/svm: Shorten virtualized VMLOAD/VMSAVE flag

"virtual_vmload_vmsave" is what is going to land in /proc/cpuinfo now
for a single feature bit which is clearly too long. So call it like it
is called in the processor manual. "v_vmload_vmsave" is a bit shorter,
after all.

We could go more aggressively here but having it the same as in the
processor manual is advantageous.

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@....com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Radim Krčmář <rkrcmar@...hat.com>
---
 arch/x86/include/asm/cpufeatures.h | 2 +-
 arch/x86/kvm/svm.c                 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index ca3c48c0872f..091b11b181b7 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -286,7 +286,7 @@
 #define X86_FEATURE_PAUSEFILTER (15*32+10) /* filtered pause intercept */
 #define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
 #define X86_FEATURE_AVIC	(15*32+13) /* Virtual Interrupt Controller */
-#define X86_FEATURE_VIRTUAL_VMLOAD_VMSAVE (15*32+15) /* Virtual VMLOAD VMSAVE */
+#define X86_FEATURE_V_VMLOAD_VMSAVE (15*32+15) /* Virtual VMLOAD VMSAVE */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
 #define X86_FEATURE_AVX512VBMI  (16*32+ 1) /* AVX512 Vector Bit Manipulation instructions*/
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 4d8141e533c3..0a7843a1498a 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1100,7 +1100,7 @@ static __init int svm_hardware_setup(void)
 
 	if (vls) {
 		if (!npt_enabled ||
-		    !boot_cpu_has(X86_FEATURE_VIRTUAL_VMLOAD_VMSAVE) ||
+		    !boot_cpu_has(X86_FEATURE_V_VMLOAD_VMSAVE) ||
 		    !IS_ENABLED(CONFIG_X86_64)) {
 			vls = false;
 		} else {
-- 
2.14.0.rc0


-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--