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From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: "Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Ingo Molnar" <mingo@redhat.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	stable@vger.kernel.org
Subject: [PATCH] KVM: VMX: Expose SSBD properly to guests.
Date: Mon, 21 May 2018 17:54:49 -0400	[thread overview]
Message-ID: <20180521215449.26423-2-konrad.wilk@oracle.com> (raw)
In-Reply-To: <20180521215449.26423-1-konrad.wilk@oracle.com>

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")

CC: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: stable@vger.kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <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();
-- 
2.13.4

  reply	other threads:[~2018-05-21 22:00 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-21 21:54 [PATCH] Fix SSBD not being exposed to guests. (v1) Konrad Rzeszutek Wilk
2018-05-21 21:54 ` Konrad Rzeszutek Wilk [this message]
2018-05-22 23:50   ` [PATCH] KVM: VMX: Expose SSBD properly to guests Ben Hutchings
2018-06-07 13:14     ` Thomas Voegtle
2018-05-23  9:00   ` [tip:x86/pti] KVM/VMX: " tip-bot for Konrad Rzeszutek Wilk

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