From: Kim Phillips <kim.phillips@amd.com>
To: <qemu-devel@nongnu.org>, <kvm@vger.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>,
Kishon Vijay Abraham I <kvijayab@amd.com>,
"Kim Phillips" <kim.phillips@amd.com>
Subject: [PATCH v3 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature
Date: Fri, 7 Feb 2025 17:34:08 -0600 [thread overview]
Message-ID: <20250207233410.130813-2-kim.phillips@amd.com> (raw)
In-Reply-To: <20250207233410.130813-1-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 508c0dad116b..a80a4164d110 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -453,6 +453,7 @@
#define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" SEV-ES full debug state swap support */
#define X86_FEATURE_RMPREAD (19*32+21) /* RMPREAD instruction */
#define X86_FEATURE_SEGMENTED_RMP (19*32+23) /* Segmented RMP support */
+#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* Allowed SEV Features */
#define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */
#define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */
--
2.43.0
next prev parent reply other threads:[~2025-02-07 23:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-07 23:34 [PATCH v3 0/2] KVM: SEV: Add support for the ALLOWED_SEV_FEATURES feature Kim Phillips
2025-02-07 23:34 ` Kim Phillips [this message]
2025-02-10 17:20 ` [PATCH v3 1/2] x86/cpufeatures: Add "Allowed SEV Features" Feature Tom Lendacky
2025-02-07 23:34 ` [PATCH v3 2/2] KVM: SEV: Configure "ALLOWED_SEV_FEATURES" VMCB Field Kim Phillips
2025-02-10 18:08 ` Tom Lendacky
2025-02-11 21:46 ` Sean Christopherson
2025-02-13 23:03 ` Kim Phillips
2025-02-14 0:55 ` Sean Christopherson
2025-02-14 21:59 ` Kim Phillips
2025-02-18 17:07 ` Sean Christopherson
2025-02-17 6:43 ` Naveen N Rao
2025-02-18 16:38 ` Sean Christopherson
2025-02-18 18:33 ` Sean Christopherson
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