From: Kim Phillips <kim.phillips@amd.com>
To: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <x86@kernel.org>
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
Michael Roth <michael.roth@amd.com>,
Ashish Kalra <ashish.kalra@amd.com>,
"Nikunj A Dadhania" <nikunj@amd.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Sean Christopherson <seanjc@google.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
"Kishon Vijay Abraham I" <kvijayab@amd.com>,
Kim Phillips <kim.phillips@amd.com>
Subject: [PATCH 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature
Date: Thu, 1 Aug 2024 20:57:31 -0500 [thread overview]
Message-ID: <20240802015732.3192877-2-kim.phillips@amd.com> (raw)
In-Reply-To: <20240802015732.3192877-1-kim.phillips@amd.com>
From: Kishon Vijay Abraham I <kvijayab@amd.com>
Add CPU feature detection for "Allowed SEV Features" to allow the
Hypervisor to enforce that SEV-ES and SEV-SNP guest VMs cannot
enable features (via SEV_FEATURES) that the Hypervisor does not
support or wish to be enabled.
Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
---
arch/x86/include/asm/cpufeatures.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index dd4682857c12..0c73da91a041 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -447,6 +447,7 @@
#define X86_FEATURE_V_TSC_AUX (19*32+ 9) /* Virtual TSC_AUX */
#define X86_FEATURE_SME_COHERENT (19*32+10) /* AMD hardware-enforced cache coherency */
#define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" AMD SEV-ES full debug state swap support */
+#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* AMD Allowed SEV Features */
#define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */
/* AMD-defined Extended Feature 2 EAX, CPUID level 0x80000021 (EAX), word 20 */
--
2.34.1
next prev parent reply other threads:[~2024-08-02 1:58 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-02 1:57 [PATCH 0/2] KVM: SEV: Add support for the ALLOWED_SEV_FEATURES feature Kim Phillips
2024-08-02 1:57 ` Kim Phillips [this message]
2024-08-07 16:06 ` [PATCH 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Thomas Gleixner
2024-08-02 1:57 ` [PATCH 2/2] KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field Kim Phillips
2024-08-09 9:34 ` Nikunj A. Dadhania
2024-08-16 22:59 ` Sean Christopherson
2024-08-19 21:38 ` Kim Phillips
2024-08-19 22:23 ` Sean Christopherson
2024-08-20 15:26 ` Kim Phillips
2024-08-20 16:12 ` Sean Christopherson
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