Commit bab9a3da authored by Borislav Petkov's avatar Borislav Petkov Committed by H. Peter Anvin

x86, msr: execute on the correct CPU subset

Make rdmsr_on_cpus/wrmsr_on_cpus execute on the current CPU only if it
is in the supplied bitmask.
Signed-off-by: default avatarBorislav Petkov <borislav.petkov@amd.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent d2ba8b21
...@@ -89,16 +89,13 @@ void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs) ...@@ -89,16 +89,13 @@ void rdmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
rv.msrs = msrs; rv.msrs = msrs;
rv.msr_no = msr_no; rv.msr_no = msr_no;
preempt_disable(); this_cpu = get_cpu();
/*
* FIXME: handle the CPU we're executing on separately for now until if (cpumask_test_cpu(this_cpu, mask))
* smp_call_function_many has been fixed to not skip it. __rdmsr_on_cpu(&rv);
*/
this_cpu = raw_smp_processor_id();
smp_call_function_single(this_cpu, __rdmsr_on_cpu, &rv, 1);
smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1); smp_call_function_many(mask, __rdmsr_on_cpu, &rv, 1);
preempt_enable(); put_cpu();
} }
EXPORT_SYMBOL(rdmsr_on_cpus); EXPORT_SYMBOL(rdmsr_on_cpus);
...@@ -121,16 +118,13 @@ void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs) ...@@ -121,16 +118,13 @@ void wrmsr_on_cpus(const cpumask_t *mask, u32 msr_no, struct msr *msrs)
rv.msrs = msrs; rv.msrs = msrs;
rv.msr_no = msr_no; rv.msr_no = msr_no;
preempt_disable(); this_cpu = get_cpu();
/*
* FIXME: handle the CPU we're executing on separately for now until if (cpumask_test_cpu(this_cpu, mask))
* smp_call_function_many has been fixed to not skip it. __wrmsr_on_cpu(&rv);
*/
this_cpu = raw_smp_processor_id();
smp_call_function_single(this_cpu, __wrmsr_on_cpu, &rv, 1);
smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1); smp_call_function_many(mask, __wrmsr_on_cpu, &rv, 1);
preempt_enable(); put_cpu();
} }
EXPORT_SYMBOL(wrmsr_on_cpus); EXPORT_SYMBOL(wrmsr_on_cpus);
......
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