linux-kernel - [tip:x86/pti] KVM/VMX: Expose SSBD properly to guests

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Date:   Wed, 23 May 2018 02:00:52 -0700
From:   tip-bot for Konrad Rzeszutek Wilk <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, rkrcmar@...hat.com, konrad.wilk@...cle.com,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, mingo@...nel.org,
        pbonzini@...hat.com
Subject: [tip:x86/pti] KVM/VMX: Expose SSBD properly to guests

Commit-ID:  0aa48468d00959c8a37cd3ac727284f4f7359151
Gitweb:     https://git.kernel.org/tip/0aa48468d00959c8a37cd3ac727284f4f7359151
Author:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
AuthorDate: Mon, 21 May 2018 17:54:49 -0400
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 23 May 2018 10:55:52 +0200

KVM/VMX: Expose SSBD properly to guests

The X86_FEATURE_SSBD is an synthetic CPU feature - that is
it bit location has no relevance to the real CPUID 0x7.EBX[31]
bit position. For that we need the new CPU feature name.

Fixes: 52817587e706 ("x86/cpufeatures: Disentangle SSBD enumeration")
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: kvm@...r.kernel.org
Cc: "Radim Krčmář" <rkrcmar@...hat.com>
Cc: stable@...r.kernel.org
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Link: https://lkml.kernel.org/r/20180521215449.26423-2-konrad.wilk@oracle.com

---
 arch/x86/kvm/cpuid.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index ced851169730..598461e24be3 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -407,8 +407,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 
 	/* cpuid 7.0.edx*/
 	const u32 kvm_cpuid_7_0_edx_x86_features =
-		F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) | F(SSBD) |
-		F(ARCH_CAPABILITIES);
+		F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) |
+		F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES);
 
 	/* all calls to cpuid_count() should be made on the same cpu */
 	get_cpu();