[PATCH v2] x86/cpu/amd: fix the highest perf query for new AMD processors

Perry Yuan
2022-06-14T08:54:05Z

In order to get the corrent highest perf for some new AMD processors,
the amd_get_highest_perf() call will check the CPU model and
return correct highest perf value.

Signed-off-by: Perry Yuan <Perry.Yuan@amd.com>
---
arch/x86/kernel/cpu/amd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 0c0b09796ced..ff2075f26ef4 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1152,7 +1152,8 @@ 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)))
+ (c->x86_model >= 0x70 && c->x86_model < 0x80) ||
+ (c->x86_model >= 0xa0 && c->x86_model < 0xb0)))
return 166;

if (c->x86 == 0x19 && ((c->x86_model >= 0x20 && c->x86_model < 0x30) ||
--
2.25.1