Proxmox-Port/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-08-25 03:17:45 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

cpufreq: intel_pstate: Avoid SMP calls to get cpu-type

Browse Source 
Intel pstate driver relies on SMP calls to get the cpu-type of a given CPU.
Remove the SMP calls and instead use the cached value of cpu-type which is
more efficient.

[ mingo: Forward ported it. ]

Suggested-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/r/20241211-add-cpu-type-v5-2-2ae010f50370@linux.intel.com
This commit is contained in:
Pawan Gupta 2024-12-11 22:57:30 -08:00 committed by Ingo Molnar
parent 4a412c70af
commit b52aaeeadf
1 changed files with 4 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/cpufreq/intel_pstate.c
View File

@ -2200,28 +2200,20 @@ static int knl_get_turbo_pstate(int cpu)
return ret;
}
static void hybrid_get_type(void *data)
{
u8 *cpu_type = data;
*cpu_type = get_this_hybrid_cpu_type();
}
static int hwp_get_cpu_scaling(int cpu)
{
if (hybrid_scaling_factor) {
u8 cpu_type = 0;
smp_call_function_single(cpu, hybrid_get_type, &cpu_type, 1);
struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
u8 cpu_type = c->topo.intel_type;
/*
* Return the hybrid scaling factor for P-cores and use the
* default core scaling for E-cores.
*/
if (cpu_type == 0x40)
if (cpu_type == INTEL_CPU_TYPE_CORE)
return hybrid_scaling_factor;
if (cpu_type == 0x20)
if (cpu_type == INTEL_CPU_TYPE_ATOM)
return core_get_scaling();
}