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authorLv Zheng <lv.zheng@intel.com>2016-12-28 15:28:49 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-01-02 23:18:41 +0100
commit0fc5e8f4e4b33ddfa1d1d673fcd420d6e13eb076 (patch)
tree98882708adde1882b7aa110832c85df4b574a307 /tools/power
parentfcfb45531d7ef71a19caaa0a983611ca57ec04fe (diff)
downloadlinux-0fc5e8f4e4b33ddfa1d1d673fcd420d6e13eb076.tar.bz2
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')
-rw-r--r--tools/power/acpi/os_specific/service_layers/osunixxf.c22
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