* [PATCH] x86/cpu/amd: remove the CPU model ID to get correct highest perf
@ 2022-10-03 15:55 Perry Yuan
0 siblings, 0 replies; only message in thread
From: Perry Yuan @ 2022-10-03 15:55 UTC (permalink / raw)
To: rafael.j.wysocki, ray.huang, viresh.kumar
Cc: Deepak.Sharma, Mario.Limonciello, Nathan.Fontenot,
Alexander.Deucher, Shimmer.Huang, Xiaojian.Du, Li.Meng, linux-pm,
linux-kernel, Perry Yuan, stable
The AMD Rome CPU model IDs(30h-3Fh) do not need to get the highest
perf value from the amd_get_highest_perf() function, the correct
highest perf will be queried from the cppc_acpi interface.
Fixes: 3743d55b2 (x86, sched: Fix the AMD CPPC maximum performance value on certain AMD Ryzen generations)
Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
Cc: stable@vger.kernel.org
---
arch/x86/kernel/cpu/amd.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 48276c0e479d..1734cc5aa7ff 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1183,8 +1183,7 @@ u32 amd_get_highest_perf(void)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
- if (c->x86 == 0x17 && ((c->x86_model >= 0x30 && c->x86_model < 0x40) ||
- (c->x86_model >= 0x70 && c->x86_model < 0x80)))
+ if (c->x86 == 0x17 && (c->x86_model >= 0x70 && c->x86_model < 0x80))
return 166;
if (c->x86 == 0x19 && ((c->x86_model >= 0x20 && c->x86_model < 0x30) ||
--
2.34.1
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