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x86/cpu: Remove write_tsc() and write_rdtscp_aux() wrappers

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Drop write_tsc() and write_rdtscp_aux(); the former has no users, and the
latter has only a single user and is slightly misleading since the only
in-kernel consumer of MSR_TSC_AUX is RDPID, not RDTSCP.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210504225632.1532621-3-seanjc@google.com
This commit is contained in:
Sean Christopherson 2021-05-04 15:56:32 -07:00 committed by Thomas Gleixner
parent b6b4fbd90b
commit fc48a6d1fa
2 changed files with 1 additions and 5 deletions
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4
arch/x86/include/asm/msr.h
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@ -324,10 +324,6 @@ static inline int wrmsrl_safe(u32 msr, u64 val)
return wrmsr_safe(msr, (u32)val, (u32)(val >> 32));
}
#define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high))
#define write_rdtscp_aux(val) wrmsr(MSR_TSC_AUX, (val), 0)
struct msr *msrs_alloc(void);
void msrs_free(struct msr *msrs);
int msr_set_bit(u32 msr, u8 bit);

2
arch/x86/kernel/cpu/common.c
View File

@ -1852,7 +1852,7 @@ static inline void setup_getcpu(int cpu)
struct desc_struct d = { };
if (boot_cpu_has(X86_FEATURE_RDTSCP) || boot_cpu_has(X86_FEATURE_RDPID))
write_rdtscp_aux(cpudata);
wrmsr(MSR_TSC_AUX, cpudata, 0);
/* Store CPU and node number in limit. */
d.limit0 = cpudata;