FAILED: patch "[PATCH] x86/cpuid: Mark CPUID function 0x23 as being indexed" failed to apply to 6.6-stable tree

[Sasha Levin <sashal@kernel.org>]

The patch below does not apply to the 6.6-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y
git checkout FETCH_HEAD
git cherry-pick -x 108775fa28fe04a16f19a828a779689f3d0ea9f0
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107053818-failed-6.6-108775fa28fe@kernel.org' --subject-prefix 'PATCH 6.6.y' 'HEAD^..'

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

From 108775fa28fe04a16f19a828a779689f3d0ea9f0 Mon Sep 17 00:00:00 2001
From: Sean Christopherson <seanjc@google.com>
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 <rick.p.edgecombe@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
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 2d9f3d4d63de6..759b12d94bbfe 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;
-- 
2.53.0