From 2af52c2bd20c50e80b121e15cd50a579e364485a Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Thu, 4 Aug 2016 16:43:39 +0800 Subject: 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 Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpica/acevents.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/acpi/acpica/acevents.h') diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h index 77af91cf46d4..92fa47c6498c 100644 --- a/drivers/acpi/acpica/acevents.h +++ b/drivers/acpi/acpica/acevents.h @@ -85,6 +85,9 @@ acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info); acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info); +acpi_status +acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked); + acpi_status acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info); -- cgit v1.2.3