From: Kim Phillips <kim.phillips@amd.com>
To: <kvm@vger.kernel.org>, <linux-coco@lists.linux.dev>,
<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>,
Kim Phillips <kim.phillips@amd.com>
Subject: [PATCH v2 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature
Date: Thu, 22 Aug 2024 17:19:37 -0500 [thread overview]
Message-ID: <20240822221938.2192109-2-kim.phillips@amd.com> (raw)
In-Reply-To: <20240822221938.2192109-1-kim.phillips@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>
---
v2: no changes
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:[~2024-08-22 22:20 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-22 22:19 [PATCH v2 0/2] KVM: SEV: Add support for the ALLOWED_SEV_FEATURES feature Kim Phillips
2024-08-22 22:19 ` Kim Phillips [this message]
2024-08-25 12:35 ` [PATCH v2 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Thomas Gleixner
2024-08-22 22:19 ` [PATCH v2 2/2] KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field Kim Phillips
2024-08-22 23:31 ` Sean Christopherson
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