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| author | Lv Zheng <lv.zheng@intel.com> | 2016-08-04 10:43:39 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-08-13 03:09:33 +0200 |
| commit | 2af52c2bd20c50e80b121e15cd50a579e364485a (patch) | |
| tree | 3bc9e680c4c65462569794ce2ce5c269d2767c38 /include/acpi/acpixf.h | |
| parent | ACPICA: Use os_allocate_zeroed (diff) | |
| download | linux-2af52c2bd20c50e80b121e15cd50a579e364485a.tar.xz linux-2af52c2bd20c50e80b121e15cd50a579e364485a.zip | |
ACPICA: Events: Introduce acpi_mask_gpe() to implement GPE masking mechanism
ACPICA commit 23a417ca406a527e7ae1710893e59a8b6db30e14
There is a facility in Linux, developers can control the enabling/disabling
of a GPE via /sys/firmware/acpi/interrupts/gpexx. This is mainly for
debugging purposes.
But many users expect to use this facility to implement quirks to mask a
specific GPE when there is a gap in Linux causing this GPE to flood. This
is not working correctly because currently this facility invokes
enabling/disabling counting based GPE driver APIs:
acpi_enable_gpe()/acpi_disable_gpe()
and the GPE drivers can still affect the count to mess up the GPE
masking purposes.
However, most of the IRQ chip designs allow masking/unmasking IRQs via a
masking bit which is different from the enabled bit to achieve the same
purpose. But the GPE hardware doesn't contain such a feature, this brings
the trouble.
In this patch, we introduce a software mechanism to implement the GPE
masking feature, and acpi_mask_gpe() are provided to the OSPMs to
mask/unmask GPEs in the above mentioned situation instead of
acpi_enable_gpe()/acpi_disable_gpe(). ACPICA BZ 1102. Lv Zheng.
Link: https://github.com/acpica/acpica/commit/23a417ca
Link: https://bugs.acpica.org/show_bug.cgi?id=1102
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 'include/acpi/acpixf.h')
| -rw-r--r-- | include/acpi/acpixf.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 875964dea539..c2d4b9c9f8a4 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -736,6 +736,10 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status u32 gpe_number)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status + acpi_mask_gpe(acpi_handle gpe_device, + u32 gpe_number, u8 is_masked)) + +ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)) |