linux-kernel - [PATCH v5 28/35] x86/cpuid: Parse CPUID(0x80000005) and CPUID(0x80000006)

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Message-ID: <20250905121515.192792-29-darwi@linutronix.de>
Date: Fri,  5 Sep 2025 14:15:08 +0200
From: "Ahmed S. Darwish" <darwi@...utronix.de>
To: Borislav Petkov <bp@...en8.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	Sean Christopherson <seanjc@...gle.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Sohil Mehta <sohil.mehta@...el.com>,
	John Ogness <john.ogness@...utronix.de>,
	x86@...nel.org,
	x86-cpuid@...ts.linux.dev,
	LKML <linux-kernel@...r.kernel.org>,
	"Ahmed S. Darwish" <darwi@...utronix.de>
Subject: [PATCH v5 28/35] x86/cpuid: Parse CPUID(0x80000005) and CPUID(0x80000006)

Parse AMD cacheinfo CPUID(0x80000005) and CPUID(0x80000006), if available,
using the generic CPUID parser read function cpuid_read_generic().

The x86/cacheinfo AMD CPUID(0x4)-emulation logic will be swithced next to
the parsed CPUID table APIs instead of invoking direct CPUID queries.

Signed-off-by: Ahmed S. Darwish <darwi@...utronix.de>
---
 arch/x86/include/asm/cpuid/types.h | 2 ++
 arch/x86/kernel/cpu/cpuid_parser.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/arch/x86/include/asm/cpuid/types.h b/arch/x86/include/asm/cpuid/types.h
index 411a2a96e3ed..5a3a365044ce 100644
--- a/arch/x86/include/asm/cpuid/types.h
+++ b/arch/x86/include/asm/cpuid/types.h
@@ -242,6 +242,8 @@ struct cpuid_leaves {
 	CPUID_LEAF   (  0x80000002,	0  );
 	CPUID_LEAF   (  0x80000003,	0  );
 	CPUID_LEAF   (  0x80000004,	0  );
+	CPUID_LEAF   (  0x80000005,	0  );
+	CPUID_LEAF   (  0x80000006,	0  );
 	CPUID_LEAF_N (  0x8000001d,	8  );
 };
 
diff --git a/arch/x86/kernel/cpu/cpuid_parser.h b/arch/x86/kernel/cpu/cpuid_parser.h
index 227ffac6b297..44a056a5a321 100644
--- a/arch/x86/kernel/cpu/cpuid_parser.h
+++ b/arch/x86/kernel/cpu/cpuid_parser.h
@@ -145,6 +145,8 @@ struct cpuid_parse_entry {
 	CPUID_PARSE_ENTRY   (	0x80000002,	0,		generic			),	\
 	CPUID_PARSE_ENTRY   (	0x80000003,	0,		generic			),	\
 	CPUID_PARSE_ENTRY   (	0x80000004,	0,		generic			),	\
+	CPUID_PARSE_ENTRY   (	0x80000005,	0,		generic			),	\
+	CPUID_PARSE_ENTRY   (	0x80000006,	0,		generic			),	\
 	CPUID_PARSE_ENTRY_N (	0x8000001d,			deterministic_cache	),	\
 
 /*
-- 
2.50.1