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Subject[PATCH 3/3] ACPI: Let ACPI know we support Generic Initiator Affinity Structures
Date
Until we tell ACPI that we support generic initiators, it will have
to operate in fall back domain mode and all _PXM entries should
be on existing non GI domains.

This patch sets the relevant OSC bit to make that happen.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---

Note that this will need platform guards unless we make generic initiators
work on all ACPI platforms from the start.

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 5c093ce01bcd..461fb393346a 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -315,6 +315,7 @@ static void acpi_bus_osc_support(void)

capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
+ capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_GENERIC_INITIATOR_SUPPORT;

#ifdef CONFIG_X86
if (boot_cpu_has(X86_FEATURE_HWP)) {
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 87715f20b69a..760c6f3d57f0 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -498,6 +498,7 @@ 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_CPC_DIVERSE_HIGH_SUPPORT 0x00001000
+#define OSC_SB_GENERIC_INITIATOR_SUPPORT 0x00002000

extern bool osc_sb_apei_support_acked;
extern bool osc_pc_lpi_support_confirmed;
--
2.18.0

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