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ACPI: CPPC: enable AMD CPPC V2 support for family 17h processors
[ Upstream commita51ab63b29
] As there are some AMD processors which only support CPPC V2 firmware and BIOS implementation, the amd_pstate driver will be failed to load when system booting with below kernel warning message: [ 0.477523] amd_pstate: the _CPC object is not present in SBIOS or ACPI disabled To make the amd_pstate driver can be loaded on those TR40 processors, it needs to match x86_model from 0x30 to 0x7F for family 17H. With the change, the system can load amd_pstate driver as expected. Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Reported-by: Gino Badouri <badouri.g@gmail.com> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218171 Fixes:fbd74d1689
("ACPI: CPPC: Fix enabling CPPC on AMD systems with shared memory") Signed-off-by: Perry Yuan <perry.yuan@amd.com> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -20,7 +20,7 @@ bool cpc_supported_by_cpu(void)
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(boot_cpu_data.x86_model >= 0x20 && boot_cpu_data.x86_model <= 0x2f)))
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return true;
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else if (boot_cpu_data.x86 == 0x17 &&
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boot_cpu_data.x86_model >= 0x70 && boot_cpu_data.x86_model <= 0x7f)
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boot_cpu_data.x86_model >= 0x30 && boot_cpu_data.x86_model <= 0x7f)
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return true;
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return boot_cpu_has(X86_FEATURE_CPPC);
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}
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