From: Armin Wolf Date: Sat, 9 Mar 2024 20:13:07 +0000 (+0100) Subject: ACPI: bus: Indicate support for more than 16 p-states thru _OSC X-Git-Tag: v6.8.12~314 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a441cf1b7017951e9e0cba04e490c18323a681bb;p=thirdparty%2Fkernel%2Fstable.git ACPI: bus: Indicate support for more than 16 p-states thru _OSC [ 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 Signed-off-by: Rafael J. Wysocki Stable-dep-of: a8a967a243d7 ("ACPI: bus: Indicate support for the Generic Event Device thru _OSC") Signed-off-by: Sasha Levin --- 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