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Subject[PATCH 1/4] ACPI: Set hotplug _OST support bit to _OSC
Date
Added macro definitions of _OST source event and status codes.
Also renamed OSC_SB_CPUHP_OST_SUPPORT to OSC_SB_HOTPLUG_OST_SUPPORT
since this _OSC bit is not specific to CPU hotplug. This bit is
defined in table 6-147 of ACPI 5.0 as follows.

Bits: 3
Field Name: Insertion / Ejection _OST Processing Support
Definition: This bit is set if OSPM will evaluate the _OST
object defined under a device when processing
insertion and ejection source event codes.

This patch sets OSC_SB_HOTPLUG_OST_SUPPORT to the platform-wide
OSPM capabilities when CONFIG option of ACPI CPU hotplug or memory
hotplug is enabled.

Signed-off-by: Toshi Kani <toshi.kani@hp.com>
---
drivers/acpi/bus.c | 5 +++++
include/linux/acpi.h | 26 +++++++++++++++++++++++++-
2 files changed, 30 insertions(+), 1 deletions(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 3263b68..a492d64 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -544,6 +544,11 @@ static void acpi_bus_osc_support(void)
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
#endif

+#if defined(CONFIG_ACPI_HOTPLUG_CPU) || defined(CONFIG_ACPI_HOTPLUG_MEMORY) ||\
+ defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE)
+ capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
+#endif
+
if (!ghes_disable)
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index f421dd8..4127df8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -277,7 +277,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
#define OSC_SB_PAD_SUPPORT 1
#define OSC_SB_PPC_OST_SUPPORT 2
#define OSC_SB_PR3_SUPPORT 4
-#define OSC_SB_CPUHP_OST_SUPPORT 8
+#define OSC_SB_HOTPLUG_OST_SUPPORT 8
#define OSC_SB_APEI_SUPPORT 16

extern bool osc_sb_apei_support_acked;
@@ -309,6 +309,30 @@ extern bool osc_sb_apei_support_acked;

extern acpi_status acpi_pci_osc_control_set(acpi_handle handle,
u32 *mask, u32 req);
+
+/* _OST General Processing Status Code */
+#define ACPI_OST_SC_SUCCESS 0x0
+#define ACPI_OST_SC_NON_SPECIFIC_FAILURE 0x1
+#define ACPI_OST_SC_UNRECOGNIZED_NOTIFY 0x2
+
+/* _OST OS Shutdown Processing (0x100) Status Code */
+#define ACPI_OST_SC_OS_SHUTDOWN_DENIED 0x80
+#define ACPI_OST_SC_OS_SHUTDOWN_IN_PROGRESS 0x81
+#define ACPI_OST_SC_OS_SHUTDOWN_COMPLETED 0x82
+#define ACPI_OST_SC_OS_SHUTDOWN_NOT_SUPPORTED 0x83
+
+/* _OST Ejection Request (0x3, 0x103) Status Code */
+#define ACPI_OST_SC_EJECT_NOT_SUPPORTED 0x80
+#define ACPI_OST_SC_DEVICE_IN_USE 0x81
+#define ACPI_OST_SC_DEVICE_BUSY 0x82
+#define ACPI_OST_SC_EJECT_DEPENDENCY_BUSY 0x83
+#define ACPI_OST_SC_EJECT_IN_PROGRESS 0x84
+
+/* _OST Insertion Request (0x200) Status Code */
+#define ACPI_OST_SC_INSERT_IN_PROGRESS 0x80
+#define ACPI_OST_SC_DRIVER_LOAD_FAILURE 0x81
+#define ACPI_OST_SC_INSERT_NOT_SUPPORTED 0x82
+
extern void acpi_early_init(void);

extern int acpi_nvs_register(__u64 start, __u64 size);
--
1.7.7.6


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