x86/msr: Add missing __percpu annotations

Sparse rightfully complains about using a plain pointer for per CPU
accessors:

  msr-smp.c:15:23: sparse: warning: incorrect type in initializer (different address spaces)
  msr-smp.c:15:23: sparse:    expected void const [noderef] __percpu *__vpp_verify
  msr-smp.c:15:23: sparse:    got struct msr *

Add __percpu annotations to the related datastructure and function
arguments to cure this. This also cures the related sparse warnings at the
callsites in drivers/edac/amd64_edac.c.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20240304005104.513181735@linutronix.de

1 files changed, 14 insertions, 12 deletions

diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 65ec1965cd28..4621e083af7b 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -12,11 +12,13 @@
 #include <uapi/asm/msr.h>
 #include <asm/shared/msr.h>
 
+#include <linux/percpu.h>
+
 struct msr_info {
-	u32 msr_no;
-	struct msr reg;
-	struct msr *msrs;
-	int err;
+	u32			msr_no;
+	struct msr		reg;
+	struct msr __percpu	*msrs;
+	int			err;
 };
 
 struct msr_regs_info {
@@ -305,8 +307,8 @@ static inline int wrmsrl_safe(u32 msr, u64 val)
 	return wrmsr_safe(msr, (u32)val,  (u32)(val >> 32));
 }
 
-struct msr *msrs_alloc(void);
-void msrs_free(struct msr *msrs);
+struct msr __percpu *msrs_alloc(void);
+void msrs_free(struct msr __percpu *msrs);
 int msr_set_bit(u32 msr, u8 bit);
 int msr_clear_bit(u32 msr, u8 bit);
 
@@ -315,8 +317,8 @@ int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
 int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
 int rdmsrl_on_cpu(unsigned int cpu, u32 msr_no, u64 *q);
 int wrmsrl_on_cpu(unsigned int cpu, u32 msr_no, u64 q);
-void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs);
-void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr *msrs);
+void rdmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr __percpu *msrs);
+void wrmsr_on_cpus(const struct cpumask *mask, u32 msr_no, struct msr __percpu *msrs);
 int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h);
 int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h);
 int rdmsrl_safe_on_cpu(unsigned int cpu, u32 msr_no, u64 *q);
@@ -345,14 +347,14 @@ static inline int wrmsrl_on_cpu(unsigned int cpu, u32 msr_no, u64 q)
 	return 0;
 }
 static inline void rdmsr_on_cpus(const struct cpumask *m, u32 msr_no,
-				struct msr *msrs)
+				struct msr __percpu *msrs)
 {
-	rdmsr_on_cpu(0, msr_no, &(msrs[0].l), &(msrs[0].h));
+	rdmsr_on_cpu(0, msr_no, raw_cpu_ptr(&msrs->l), raw_cpu_ptr(&msrs->h));
 }
 static inline void wrmsr_on_cpus(const struct cpumask *m, u32 msr_no,
-				struct msr *msrs)
+				struct msr __percpu *msrs)
 {
-	wrmsr_on_cpu(0, msr_no, msrs[0].l, msrs[0].h);
+	wrmsr_on_cpu(0, msr_no, raw_cpu_read(msrs->l), raw_cpu_read(msrs->h));
 }
 static inline int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no,
 				    u32 *l, u32 *h)