From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, Kiryl Shutsemau <kas@kernel.org>,
Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-coco@lists.linux.dev,
Binbin Wu <binbin.wu@linux.intel.com>,
Changyuan Lyu <changyuanl@google.com>,
Sashiko <sashiko-bot@kernel.org>
Subject: [PATCH v2 1/3] x86/cpuid: Mark CPUID function 0x23 as being indexed
Date: Thu, 22 Oct 2026 14:01:32 -0700 [thread overview]
Message-ID: <20261022210134.612848-2-seanjc@google.com> (raw)
In-Reply-To: <20261022210134.612848-1-seanjc@google.com>
Add function 0x23 to the set of CPUID functions that are indexed, as per
the SDM and the many sub-leafs defined in leaf_types.h.
Reported-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Closes: https://lore.kernel.org/all/213d614fe73e183a230c8f4e0c8fa1cc3d45df39.camel@intel.com
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/include/asm/cpuid/api.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/cpuid/api.h b/arch/x86/include/asm/cpuid/api.h
index 82eddfa2347b..25b22b173f2a 100644
--- a/arch/x86/include/asm/cpuid/api.h
+++ b/arch/x86/include/asm/cpuid/api.h
@@ -181,6 +181,7 @@ static __always_inline bool cpuid_function_is_indexed(u32 function)
case 0x1d:
case 0x1e:
case 0x1f:
+ case 0x23:
case 0x24:
case 0x8000001d:
return true;
--
2.56.0.257.gf7497c7d27-goog
next prev parent reply other threads:[~2026-10-22 21:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 21:01 [PATCH v2 0/3] x86/cpuid: KVM: TDX CPUID fixes Sean Christopherson
2026-10-22 21:01 ` Sean Christopherson [this message]
2026-10-22 21:01 ` [PATCH v2 2/3] KVM: TDX: Set SIGNIFCANT_INDEX flag as appropriate when filling CPUID entries Sean Christopherson
2026-10-22 21:01 ` [PATCH v2 3/3] KVM: TDX: Reject KVM_TDX_INIT_VM if indexed CPUID functions don't match Sean Christopherson
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