linux-kernel - [PATCH v3 18/44] x86/cpuid: Rename cpuid_leaf()/cpuid

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Message-ID: <20250612234010.572636-19-darwi@linutronix.de>
Date: Fri, 13 Jun 2025 01:39:44 +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>,
	Peter Zijlstra <peterz@...radead.org>,
	Sean Christopherson <seanjc@...gle.com>,
	Sohil Mehta <sohil.mehta@...el.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	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 v3 18/44] x86/cpuid: Rename cpuid_leaf()/cpuid_subleaf() APIs

A new CPUID model will be added where its APIs will be designated as the
"official" CPUID API.  Free the cpuid_leaf() and cpuid_subleaf() function
names for that model.  Rename them accordingly to cpuid_read() and
cpuid_read_subleaf().

Note, for kernel/cpuid.c, rename its local file operations read function
from cpuid_read() to cpuid_read_f() so that it does not conflict with the
new names.

No functional change.

Signed-off-by: Ahmed S. Darwish <darwi@...utronix.de>
---
 arch/x86/include/asm/cpuid/api.h   | 6 +++---
 arch/x86/kernel/cpu/topology_amd.c | 2 +-
 arch/x86/kernel/cpu/topology_ext.c | 2 +-
 arch/x86/kernel/cpuid.c            | 5 ++---
 4 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/cpuid/api.h b/arch/x86/include/asm/cpuid/api.h
index 44fa82e1267c..2b9750cc8a75 100644
--- a/arch/x86/include/asm/cpuid/api.h
+++ b/arch/x86/include/asm/cpuid/api.h
@@ -131,12 +131,12 @@ static inline void __cpuid_read(u32 leaf, u32 subleaf, u32 *regs)
 	__cpuid(regs + CPUID_EAX, regs + CPUID_EBX, regs + CPUID_ECX, regs + CPUID_EDX);
 }
 
-#define cpuid_subleaf(leaf, subleaf, regs) {		\
+#define cpuid_read_subleaf(leaf, subleaf, regs) {	\
 	static_assert(sizeof(*(regs)) == 16);		\
 	__cpuid_read(leaf, subleaf, (u32 *)(regs));	\
 }
 
-#define cpuid_leaf(leaf, regs) {			\
+#define cpuid_read(leaf, regs) {			\
 	static_assert(sizeof(*(regs)) == 16);		\
 	__cpuid_read(leaf, 0, (u32 *)(regs));		\
 }
@@ -228,7 +228,7 @@ static inline u32 cpuid_base_hypervisor(const char *sig, u32 leaves)
  */
 static inline void cpuid_leaf_0x2(union leaf_0x2_regs *regs)
 {
-	cpuid_leaf(0x2, regs);
+	cpuid_read(0x2, regs);
 
 	/*
 	 * All Intel CPUs must report an iteration count of 1.	In case
diff --git a/arch/x86/kernel/cpu/topology_amd.c b/arch/x86/kernel/cpu/topology_amd.c
index abc6f5a7a486..c6bedae12a7e 100644
--- a/arch/x86/kernel/cpu/topology_amd.c
+++ b/arch/x86/kernel/cpu/topology_amd.c
@@ -80,7 +80,7 @@ static bool parse_8000_001e(struct topo_scan *tscan, bool has_topoext)
 	if (!boot_cpu_has(X86_FEATURE_TOPOEXT))
 		return false;
 
-	cpuid_leaf(0x8000001e, &leaf);
+	cpuid_read(0x8000001e, &leaf);
 
 	tscan->c->topo.initial_apicid = leaf.ext_apic_id;
 
diff --git a/arch/x86/kernel/cpu/topology_ext.c b/arch/x86/kernel/cpu/topology_ext.c
index eb915c73895f..60dfaa02ffd0 100644
--- a/arch/x86/kernel/cpu/topology_ext.c
+++ b/arch/x86/kernel/cpu/topology_ext.c
@@ -71,7 +71,7 @@ static inline bool topo_subleaf(struct topo_scan *tscan, u32 leaf, u32 subleaf,
 	default: return false;
 	}
 
-	cpuid_subleaf(leaf, subleaf, &sl);
+	cpuid_read_subleaf(leaf, subleaf, &sl);
 
 	if (!sl.num_processors || sl.type == INVALID_TYPE)
 		return false;
diff --git a/arch/x86/kernel/cpuid.c b/arch/x86/kernel/cpuid.c
index cbd04b677fd1..b55fe9c7359a 100644
--- a/arch/x86/kernel/cpuid.c
+++ b/arch/x86/kernel/cpuid.c
@@ -59,8 +59,7 @@ static void cpuid_smp_cpuid(void *cmd_block)
 	complete(&cmd->done);
 }
 
-static ssize_t cpuid_read(struct file *file, char __user *buf,
-			  size_t count, loff_t *ppos)
+static ssize_t cpuid_read_f(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
 	char __user *tmp = buf;
 	struct cpuid_regs_done cmd;
@@ -120,7 +119,7 @@ static int cpuid_open(struct inode *inode, struct file *file)
 static const struct file_operations cpuid_fops = {
 	.owner = THIS_MODULE,
 	.llseek = no_seek_end_llseek,
-	.read = cpuid_read,
+	.read = cpuid_read_f,
 	.open = cpuid_open,
 };
 
-- 
2.49.0