From 108775fa28fe04a16f19a828a779689f3d0ea9f0 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Thu, 22 Oct 2026 14:01:32 -0700 Subject: [PATCH] x86/cpuid: Mark CPUID function 0x23 as being indexed 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. Closes: https://lore.kernel.org/all/213d614fe73e183a230c8f4e0c8fa1cc3d45df39.camel@intel.com Reported-by: Rick Edgecombe Signed-off-by: Sean Christopherson Signed-off-by: Borislav Petkov (AMD) Tested-by: Rick Edgecombe Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20261022210134.612848-2-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 2d9f3d4d63de..759b12d94bbf 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;