linux-kernel - [PATCH v1 21/26] x86/cpuid: Scan CPUID(0x80000005) and CPUID(0x80000006)

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Message-ID: <20250506050437.10264-22-darwi@linutronix.de>
Date: Tue,  6 May 2025 07:04:32 +0200
From: "Ahmed S. Darwish" <darwi@...utronix.de>
To: Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	"H. Peter Anvin" <hpa@...or.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 v1 21/26] x86/cpuid: Scan CPUID(0x80000005) and CPUID(0x80000006)

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

Follow-up commits will switch the x86/cacheinfo AMD CPUID(0x4)-emulation
logic to the scanned CPUID table API.

Signed-off-by: Ahmed S. Darwish <darwi@...utronix.de>
---
 arch/x86/include/asm/cpuid/types.h  | 2 ++
 arch/x86/kernel/cpu/cpuid_scanner.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 2ac3d05c3fe4..50280bbc01d6 100644
--- a/arch/x86/include/asm/cpuid/types.h
+++ b/arch/x86/include/asm/cpuid/types.h
@@ -183,6 +183,8 @@ struct cpuid_leaves {
 	CPUID_LEAF(0x2,		0,		1);
 	CPUID_LEAF(0x4,		0,		8);
 	CPUID_LEAF(0x80000000,	0,		1);
+	CPUID_LEAF(0x80000005,	0,		1);
+	CPUID_LEAF(0x80000006,	0,		1);
 	CPUID_LEAF(0x8000001d,	0,		8);
 };
 
diff --git a/arch/x86/kernel/cpu/cpuid_scanner.h b/arch/x86/kernel/cpu/cpuid_scanner.h
index a09110a4c72c..42d88732b1f5 100644
--- a/arch/x86/kernel/cpu/cpuid_scanner.h
+++ b/arch/x86/kernel/cpu/cpuid_scanner.h
@@ -95,6 +95,8 @@ struct cpuid_scan_entry {
 	SCAN_ENTRY(0x2,		0,		0x2),				\
 	SCAN_ENTRY(0x4,		0,		deterministic_cache),		\
 	SCAN_ENTRY(0x80000000,  0,              0x80000000),			\
+	SCAN_ENTRY(0x80000005,  0,              generic),			\
+	SCAN_ENTRY(0x80000006,  0,              generic),			\
 	SCAN_ENTRY(0x8000001d,  0,              deterministic_cache),		\
 
 /**
-- 
2.49.0