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

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Date:   Tue, 14 Jun 2022 04:52:54 -0400
From:   Perry Yuan <Perry.Yuan@....com>
To:     <Ray.Huang@....com>, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, <x86@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>, Perry Yuan <Perry.Yuan@....com>,
        Kim Phillips <kim.phillips@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Tony Luck <tony.luck@...el.com>,
        Jane Malalane <jane.malalane@...rix.com>,
        "Mario Limonciello" <mario.limonciello@....com>,
        <linux-kernel@...r.kernel.org>
CC:     <Jinzhou.Su@....com>, <Li.Meng@....com>, <linux-pm@...r.kernel.org>
Subject: [PATCH v2] x86/cpu/amd: fix the highest perf query for new AMD processors

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@....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