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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2022-07-08 13:05:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-07-08 13:05:56 -0700 |
| commit | 525496a030de4ae64bb9e1d6bfc88eec6f5fe6e2 (patch) | |
| tree | cf69e3d6e74759e80e7505acaf1b2dcf1f535e70 /arch | |
| parent | Merge tag 'pm-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm (diff) | |
| parent | ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported (diff) | |
| download | wireguard-linux-525496a030de4ae64bb9e1d6bfc88eec6f5fe6e2.tar.xz wireguard-linux-525496a030de4ae64bb9e1d6bfc88eec6f5fe6e2.zip | |
Merge tag 'acpi-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix two recent regressions related to CPPC support.
Specifics:
- Prevent _CPC from being used if the platform firmware does not
confirm CPPC v2 support via _OSC (Mario Limonciello)
- Allow systems with X86_FEATURE_CPPC set to use _CPC even if CPPC
support cannot be agreed on via _OSC (Mario Limonciello)"
* tag 'acpi-5.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: CPPC: Don't require _OSC if X86_FEATURE_CPPC is supported
ACPI: CPPC: Only probe for _CPC if CPPC v2 is acked
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/acpi/cppc.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/acpi/cppc.c b/arch/x86/kernel/acpi/cppc.c index 8b8cbf22461a..734b96454896 100644 --- a/arch/x86/kernel/acpi/cppc.c +++ b/arch/x86/kernel/acpi/cppc.c @@ -11,6 +11,16 @@ /* Refer to drivers/acpi/cppc_acpi.c for the description of functions */ +bool cpc_supported_by_cpu(void) +{ + switch (boot_cpu_data.x86_vendor) { + case X86_VENDOR_AMD: + case X86_VENDOR_HYGON: + return boot_cpu_has(X86_FEATURE_CPPC); + } + return false; +} + bool cpc_ffh_supported(void) { return true; |