forked from luck/tmp_suning_uos_patched
x86: msr-on-cpu: remove unnecessary level of abstraction
Remove an unnecessary level of abstraction in the msr-on-cpu library. Although this duplicates some code, the duplicated code is less than the additional code, and this way should be faster. Additionally, change the order of the functions to make the regular structure of this file more obvious. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
parent
94d4ac2f4a
commit
bdd314616f
|
@ -16,37 +16,46 @@ static void __rdmsr_on_cpu(void *info)
|
|||
rdmsr(rv->msr_no, rv->l, rv->h);
|
||||
}
|
||||
|
||||
static void __rdmsr_safe_on_cpu(void *info)
|
||||
static void __wrmsr_on_cpu(void *info)
|
||||
{
|
||||
struct msr_info *rv = info;
|
||||
|
||||
rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h);
|
||||
wrmsr(rv->msr_no, rv->l, rv->h);
|
||||
}
|
||||
|
||||
static int _rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h, int safe)
|
||||
int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
|
||||
{
|
||||
int err = 0;
|
||||
int err;
|
||||
struct msr_info rv;
|
||||
|
||||
rv.msr_no = msr_no;
|
||||
if (safe) {
|
||||
err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu,
|
||||
&rv, 1);
|
||||
err = err ? err : rv.err;
|
||||
} else {
|
||||
err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
|
||||
}
|
||||
err = smp_call_function_single(cpu, __rdmsr_on_cpu, &rv, 1);
|
||||
*l = rv.l;
|
||||
*h = rv.h;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __wrmsr_on_cpu(void *info)
|
||||
int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
|
||||
{
|
||||
int err;
|
||||
struct msr_info rv;
|
||||
|
||||
rv.msr_no = msr_no;
|
||||
rv.l = l;
|
||||
rv.h = h;
|
||||
err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/* These "safe" variants are slower and should be used when the target MSR
|
||||
may not actually exist. */
|
||||
static void __rdmsr_safe_on_cpu(void *info)
|
||||
{
|
||||
struct msr_info *rv = info;
|
||||
|
||||
wrmsr(rv->msr_no, rv->l, rv->h);
|
||||
rv->err = rdmsr_safe(rv->msr_no, &rv->l, &rv->h);
|
||||
}
|
||||
|
||||
static void __wrmsr_safe_on_cpu(void *info)
|
||||
|
@ -56,45 +65,30 @@ static void __wrmsr_safe_on_cpu(void *info)
|
|||
rv->err = wrmsr_safe(rv->msr_no, rv->l, rv->h);
|
||||
}
|
||||
|
||||
static int _wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h, int safe)
|
||||
int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
|
||||
{
|
||||
int err = 0;
|
||||
int err;
|
||||
struct msr_info rv;
|
||||
|
||||
rv.msr_no = msr_no;
|
||||
err = smp_call_function_single(cpu, __rdmsr_safe_on_cpu, &rv, 1);
|
||||
*l = rv.l;
|
||||
*h = rv.h;
|
||||
|
||||
return err ? err : rv.err;
|
||||
}
|
||||
|
||||
int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
|
||||
{
|
||||
int err;
|
||||
struct msr_info rv;
|
||||
|
||||
rv.msr_no = msr_no;
|
||||
rv.l = l;
|
||||
rv.h = h;
|
||||
if (safe) {
|
||||
err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu,
|
||||
&rv, 1);
|
||||
err = err ? err : rv.err;
|
||||
} else {
|
||||
err = smp_call_function_single(cpu, __wrmsr_on_cpu, &rv, 1);
|
||||
}
|
||||
err = smp_call_function_single(cpu, __wrmsr_safe_on_cpu, &rv, 1);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
int wrmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
|
||||
{
|
||||
return _wrmsr_on_cpu(cpu, msr_no, l, h, 0);
|
||||
}
|
||||
|
||||
int rdmsr_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
|
||||
{
|
||||
return _rdmsr_on_cpu(cpu, msr_no, l, h, 0);
|
||||
}
|
||||
|
||||
/* These "safe" variants are slower and should be used when the target MSR
|
||||
may not actually exist. */
|
||||
int wrmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 l, u32 h)
|
||||
{
|
||||
return _wrmsr_on_cpu(cpu, msr_no, l, h, 1);
|
||||
}
|
||||
|
||||
int rdmsr_safe_on_cpu(unsigned int cpu, u32 msr_no, u32 *l, u32 *h)
|
||||
{
|
||||
return _rdmsr_on_cpu(cpu, msr_no, l, h, 1);
|
||||
return err ? err : rv.err;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(rdmsr_on_cpu);
|
||||
|
|
Loading…
Reference in New Issue
Block a user