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| 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 /tools/power/acpi/os_specific | |
| parent | ACPICA: Macro header: Fix some typos in comments (diff) | |
| download | linux-dev-0fc5e8f4e4b33ddfa1d1d673fcd420d6e13eb076.tar.xz linux-dev-0fc5e8f4e4b33ddfa1d1d673fcd420d6e13eb076.zip | |
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 'tools/power/acpi/os_specific')
| -rw-r--r-- | tools/power/acpi/os_specific/service_layers/osunixxf.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/osunixxf.c b/tools/power/acpi/os_specific/service_layers/osunixxf.c index 10648aaf6164..e41c2644c347 100644 --- a/tools/power/acpi/os_specific/service_layers/osunixxf.c +++ b/tools/power/acpi/os_specific/service_layers/osunixxf.c @@ -318,6 +318,28 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, /****************************************************************************** * + * FUNCTION: acpi_os_enter_sleep + * + * PARAMETERS: sleep_state - Which sleep state to enter + * rega_value - Register A value + * regb_value - Register B value + * + * RETURN: Status + * + * DESCRIPTION: A hook before writing sleep registers to enter the sleep + * state. Return AE_CTRL_TERMINATE to skip further sleep register + * writes. + * + *****************************************************************************/ + +acpi_status acpi_os_enter_sleep(u8 sleep_state, u32 rega_value, u32 regb_value) +{ + + return (AE_OK); +} + +/****************************************************************************** + * * FUNCTION: acpi_os_redirect_output * * PARAMETERS: destination - An open file handle/pointer |