[PATCH v2 1/3] x86/cpuid: Mark CPUID function 0x23 as being indexed
From: Sean Christopherson
Date: Thu Oct 22 2026 - 17:03:28 EST
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@xxxxxxxxx>
Closes: https://lore.kernel.org/all/213d614fe73e183a230c8f4e0c8fa1cc3d45df39.camel@xxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
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