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Subject[PATCH v8 1/3] x86/acpi: Introduce acpi_os_prepare_extended_sleep callback for extended sleep path
Date
Like acpi_os_prepare_sleep, register a callback for use in systems like
tboot, and xen, which have system specific requirements outside of acpica.
This mirrors the functionality in acpi_os_prepare_sleep(), called from
acpi_hw_sleep()

Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
---
drivers/acpi/acpica/hwesleep.c | 9 +++++++++
drivers/acpi/osl.c | 24 ++++++++++++++++++++++++
include/linux/acpi.h | 7 +++++++
3 files changed, 40 insertions(+)

diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
index 5e5f762..4140768 100644
--- a/drivers/acpi/acpica/hwesleep.c
+++ b/drivers/acpi/acpica/hwesleep.c
@@ -43,6 +43,7 @@
*/

#include <acpi/acpi.h>
+#include <linux/acpi.h>
#include "accommon.h"

#define _COMPONENT ACPI_HARDWARE
@@ -128,6 +129,14 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)

ACPI_FLUSH_CPU_CACHE();

+ status = acpi_os_prepare_extended_sleep(sleep_state,
+ acpi_gbl_sleep_type_a,
+ acpi_gbl_sleep_type_b);
+ if (ACPI_SKIP(status))
+ return_ACPI_STATUS(AE_OK);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
/*
* Set the SLP_TYP and SLP_EN bits.
*
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 6ab2c35..a934950 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -79,6 +79,8 @@ extern char line_buf[80];

static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
u32 pm1b_ctrl);
+static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
+ u32 val_b);

static acpi_osd_handler acpi_irq_handler;
static void *acpi_irq_context;
@@ -1779,6 +1781,28 @@ void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
__acpi_os_prepare_sleep = func;
}

+acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
+ u32 val_b)
+{
+ int rc = 0;
+ if (__acpi_os_prepare_extended_sleep)
+ rc = __acpi_os_prepare_extended_sleep(sleep_state,
+ val_a, val_b);
+ if (rc < 0)
+ return AE_ERROR;
+ else if (rc > 0)
+ return AE_CTRL_SKIP;
+
+ return AE_OK;
+}
+
+void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
+ u32 val_a, u32 val_b))
+{
+ __acpi_os_prepare_extended_sleep = func;
+}
+
+
void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context,
void (*func)(struct work_struct *work))
{
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 353ba25..a5db4ae 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -481,6 +481,13 @@ void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,

acpi_status acpi_os_prepare_sleep(u8 sleep_state,
u32 pm1a_control, u32 pm1b_control);
+
+void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
+ u32 val_a, u32 val_b));
+
+acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state,
+ u32 val_a, u32 val_b);
+
#ifdef CONFIG_X86
void arch_reserve_mem_area(acpi_physical_address addr, size_t size);
#else
--
1.7.9.5


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