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cpufreq: ACPI: Simplify MSR read on the boot CPU

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Replace the 32-bit MSR access function with a 64-bit variant to simplify
the call site, eliminating unnecessary 32-bit value manipulations.

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Link: https://patch.msgid.link/20241106182313.165297-1-chang.seok.bae@intel.com
[ rjw: Subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Chang S. Bae 2024-11-06 10:23:13 -08:00 committed by Rafael J. Wysocki
parent 70d8b6485b
commit b35ea78a47
1 changed files with 2 additions and 5 deletions
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7
drivers/cpufreq/acpi-cpufreq.c
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@ -73,20 +73,17 @@ static unsigned int acpi_pstate_strict;
static bool boost_state(unsigned int cpu)
{
u32 lo, hi;
u64 msr;
switch (boot_cpu_data.x86_vendor) {
case X86_VENDOR_INTEL:
case X86_VENDOR_CENTAUR:
case X86_VENDOR_ZHAOXIN:
rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi);
msr = lo | ((u64)hi << 32);
rdmsrl_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &msr);
return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE);
case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
msr = lo | ((u64)hi << 32);
rdmsrl_on_cpu(cpu, MSR_K7_HWCR, &msr);
return !(msr & MSR_K7_HWCR_CPB_DIS);
}
return false;