diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2016-12-28 15:28:49 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-01-02 23:18:41 +0100 |
| commit | 0fc5e8f4e4b33ddfa1d1d673fcd420d6e13eb076 (patch) | |
| tree | 98882708adde1882b7aa110832c85df4b574a307 /drivers/acpi/acpica/hwesleep.c | |
| parent | fcfb45531d7ef71a19caaa0a983611ca57ec04fe (diff) | |
ACPICA: Hardware: Add sleep register hooks
ACPICA commit ba665dc8e20d9f7730466a659564dd6c557a6cbc
In Linux, para-virtualization implmentation hooks critical register
writes to prevent real hardware operations. This increases divergences
when the sleep registers are cracked in Linux resident ACPICA.
This patch tries to introduce a single OSL to reduce the divergences.
Link: https://github.com/acpica/acpica/commit/ba665dc8
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/hwesleep.c')
| -rw-r--r-- | drivers/acpi/acpica/hwesleep.c | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c index 3f2fb4b31fdc..9023a1b87a54 100644 --- a/drivers/acpi/acpica/hwesleep.c +++ b/drivers/acpi/acpica/hwesleep.c @@ -43,7 +43,6 @@ */ #include <acpi/acpi.h> -#include <linux/acpi.h> #include "accommon.h" #define _COMPONENT ACPI_HARDWARE @@ -103,7 +102,7 @@ void acpi_hw_execute_sleep_method(char *method_pathname, u32 integer_argument) acpi_status acpi_hw_extended_sleep(u8 sleep_state) { acpi_status status; - u8 sleep_type_value; + u8 sleep_control; u64 sleep_status; ACPI_FUNCTION_TRACE(hw_extended_sleep); @@ -125,18 +124,6 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state) acpi_gbl_system_awake_and_running = FALSE; - /* Flush caches, as per ACPI specification */ - - 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. * @@ -146,12 +133,22 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state) ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Entering sleep state [S%u]\n", sleep_state)); - sleep_type_value = - ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & - ACPI_X_SLEEP_TYPE_MASK); + sleep_control = ((acpi_gbl_sleep_type_a << ACPI_X_SLEEP_TYPE_POSITION) & + ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE; + + /* Flush caches, as per ACPI specification */ + + ACPI_FLUSH_CPU_CACHE(); + + status = acpi_os_enter_sleep(sleep_state, sleep_control, 0); + if (status == AE_CTRL_TERMINATE) { + return_ACPI_STATUS(AE_OK); + } + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - status = acpi_write((u64)(sleep_type_value | ACPI_X_SLEEP_ENABLE), - &acpi_gbl_FADT.sleep_control); + status = acpi_write((u64)sleep_control, &acpi_gbl_FADT.sleep_control); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } |