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ACPICA: Hardware: Add sleep register hooks

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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>
This commit is contained in:
Lv Zheng
2016-12-28 15:28:49 +08:00
committed by Rafael J. Wysocki
parent fcfb45531d
commit 0fc5e8f4e4
6 changed files with 76 additions and 32 deletions
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drivers/acpi/osl.c
+25 -2
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@@ -1686,7 +1686,7 @@ acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
if (rc < 0)
return AE_ERROR;
else if (rc > 0)
return AE_CTRL_SKIP;
return AE_CTRL_TERMINATE;
return AE_OK;
}
@@ -1697,6 +1697,7 @@ void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
__acpi_os_prepare_sleep = func;
}
#if (ACPI_REDUCED_HARDWARE)
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
u32 val_b)
{
@@ -1707,13 +1708,35 @@ acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
if (rc < 0)
return AE_ERROR;
else if (rc > 0)
return AE_CTRL_SKIP;
return AE_CTRL_TERMINATE;
return AE_OK;
}
#else
acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
u32 val_b)
{
return AE_OK;
}
#endif
void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
u32 val_a, u32 val_b))
{
__acpi_os_prepare_extended_sleep = func;
}
acpi_status acpi_os_enter_sleep(u8 sleep_state,
u32 reg_a_value, u32 reg_b_value)
{
acpi_status status;
if (acpi_gbl_reduced_hardware)
status = acpi_os_prepare_extended_sleep(sleep_state,
reg_a_value,
reg_b_value);
else
status = acpi_os_prepare_sleep(sleep_state,
reg_a_value, reg_b_value);
return status;
}