6.8-stable review patch. If anyone has any objections, please let me know.
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From: Armin Wolf W_Armin@gmx.de
[ Upstream commit 6e8345f23ca37d6d41bb76be5d6a705ddf542817 ]
The code responsible for parsing the available p-states should have no problems handling more than 16 p-states.
Indicate this by setting bit 10 ("Greater Than 16 p-state support") when evaluating _OSC.
Signed-off-by: Armin Wolf W_Armin@gmx.de Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Stable-dep-of: a8a967a243d7 ("ACPI: bus: Indicate support for the Generic Event Device thru _OSC") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/bus.c | 1 + include/linux/acpi.h | 1 + 2 files changed, 2 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 9c5fc12fc13cb..aee91fa2a4596 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -321,6 +321,7 @@ static void acpi_bus_osc_negotiate_platform_control(void)
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT; + capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_OVER_16_PSTATES_SUPPORT; if (IS_ENABLED(CONFIG_ACPI_PRMT)) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PRM_SUPPORT; if (IS_ENABLED(CONFIG_ACPI_FFH)) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index e4f4fb67ab55a..7658d06b5bccf 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -574,6 +574,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context); #define OSC_SB_PCLPI_SUPPORT 0x00000080 #define OSC_SB_OSLPI_SUPPORT 0x00000100 #define OSC_SB_FAST_THERMAL_SAMPLING_SUPPORT 0x00000200 +#define OSC_SB_OVER_16_PSTATES_SUPPORT 0x00000400 #define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000 #define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000 #define OSC_SB_CPC_FLEXIBLE_ADR_SPACE 0x00004000