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Groups > linux.kernel > #1620470
| From | Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4.9 099/152] ACPI / sysfs: Provide quirk mechanism to prevent GPE flooding |
| Date | 2017-04-10 19:40 +0200 |
| Message-ID | <tuLsd-3QQ-3@gated-at.bofh.it> (permalink) |
| References | <tuKFP-3ds-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lv Zheng <lv.zheng@intel.com>
[ Upstream commit 9c4aa1eecb48cfac18ed5e3aca9d9ae58fbafc11 ]
Sometimes, the users may require a quirk to be provided from ACPI subsystem
core to prevent a GPE from flooding.
Normally, if a GPE cannot be dispatched, ACPICA core automatically prevents
the GPE from firing. But there are cases the GPE is dispatched by _Lxx/_Exx
provided via AML table, and OSPM is lacking of the knowledge to get
_Lxx/_Exx correctly executed to handle the GPE, thus the GPE flooding may
still occur.
The existing quirk mechanism can be enabled/disabled using the following
commands to prevent such kind of GPE flooding during runtime:
# echo mask > /sys/firmware/acpi/interrupts/gpe00
# echo unmask > /sys/firmware/acpi/interrupts/gpe00
To avoid GPE flooding during boot, we need a boot stage mechanism.
This patch provides such a boot stage quirk mechanism to stop this kind of
GPE flooding. This patch doesn't fix any feature gap but since the new
feature gaps could be found in the future endlessly, and can disappear if
the feature gaps are filled, providing a boot parameter rather than a DMI
table should suffice.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=53071
Link: https://bugzilla.kernel.org/show_bug.cgi?id=117481
Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
Documentation/kernel-parameters.txt | 10 ++++++
drivers/acpi/internal.h | 1
drivers/acpi/scan.c | 1
drivers/acpi/sysfs.c | 56 ++++++++++++++++++++++++++++++++++++
4 files changed, 68 insertions(+)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -305,6 +305,16 @@ bytes respectively. Such letter suffixes
use by PCI
Format: <irq>,<irq>...
+ acpi_mask_gpe= [HW,ACPI]
+ Due to the existence of _Lxx/_Exx, some GPEs triggered
+ by unsupported hardware/firmware features can result in
+ GPE floodings that cannot be automatically disabled by
+ the GPE dispatcher.
+ This facility can be used to prevent such uncontrolled
+ GPE floodings.
+ Format: <int>
+ Support masking of GPEs numbered from 0x00 to 0x7f.
+
acpi_no_auto_serialize [HW,ACPI]
Disable auto-serialization of AML methods
AML control methods that contain the opcodes to create
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -37,6 +37,7 @@ void acpi_amba_init(void);
static inline void acpi_amba_init(void) {}
#endif
int acpi_sysfs_init(void);
+void acpi_gpe_apply_masked_gpes(void);
void acpi_container_init(void);
void acpi_memory_hotplug_init(void);
#ifdef CONFIG_ACPI_HOTPLUG_IOAPIC
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2044,6 +2044,7 @@ int __init acpi_scan_init(void)
}
}
+ acpi_gpe_apply_masked_gpes();
acpi_update_all_gpes();
acpi_ec_ecdt_start();
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -708,6 +708,62 @@ end:
return result ? result : size;
}
+/*
+ * A Quirk Mechanism for GPE Flooding Prevention:
+ *
+ * Quirks may be needed to prevent GPE flooding on a specific GPE. The
+ * flooding typically cannot be detected and automatically prevented by
+ * ACPI_GPE_DISPATCH_NONE check because there is a _Lxx/_Exx prepared in
+ * the AML tables. This normally indicates a feature gap in Linux, thus
+ * instead of providing endless quirk tables, we provide a boot parameter
+ * for those who want this quirk. For example, if the users want to prevent
+ * the GPE flooding for GPE 00, they need to specify the following boot
+ * parameter:
+ * acpi_mask_gpe=0x00
+ * The masking status can be modified by the following runtime controlling
+ * interface:
+ * echo unmask > /sys/firmware/acpi/interrupts/gpe00
+ */
+
+/*
+ * Currently, the GPE flooding prevention only supports to mask the GPEs
+ * numbered from 00 to 7f.
+ */
+#define ACPI_MASKABLE_GPE_MAX 0x80
+
+static u64 __initdata acpi_masked_gpes;
+
+static int __init acpi_gpe_set_masked_gpes(char *val)
+{
+ u8 gpe;
+
+ if (kstrtou8(val, 0, &gpe) || gpe > ACPI_MASKABLE_GPE_MAX)
+ return -EINVAL;
+ acpi_masked_gpes |= ((u64)1<<gpe);
+
+ return 1;
+}
+__setup("acpi_mask_gpe=", acpi_gpe_set_masked_gpes);
+
+void __init acpi_gpe_apply_masked_gpes(void)
+{
+ acpi_handle handle;
+ acpi_status status;
+ u8 gpe;
+
+ for (gpe = 0;
+ gpe < min_t(u8, ACPI_MASKABLE_GPE_MAX, acpi_current_gpe_count);
+ gpe++) {
+ if (acpi_masked_gpes & ((u64)1<<gpe)) {
+ status = acpi_get_gpe_device(gpe, &handle);
+ if (ACPI_SUCCESS(status)) {
+ pr_info("Masking GPE 0x%x.\n", gpe);
+ (void)acpi_mask_gpe(handle, gpe, TRUE);
+ }
+ }
+ }
+}
+
void acpi_irq_stats_init(void)
{
acpi_status status;
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[PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 18:50 +0200
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[PATCH 4.9 115/152] ARM: davinci: add skeleton for pdata-quirks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
Re: [PATCH 4.9 115/152] ARM: davinci: add skeleton for pdata-quirks Sekhar Nori <nsekhar@ti.com> - 2017-04-11 08:50 +0200
Re: [PATCH 4.9 115/152] ARM: davinci: add skeleton for pdata-quirks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 16:40 +0200
Re: [PATCH 4.9 115/152] ARM: davinci: add skeleton for pdata-quirks Sekhar Nori <nsekhar@ti.com> - 2017-04-11 16:50 +0200
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[PATCH 4.9 112/152] Input: gpio_keys - add support for GPIO descriptors Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
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[PATCH 4.9 129/152] ASoC: Intel: cht_bsw_rt5645: harden ACPI device detection Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
[PATCH 4.9 123/152] [media] rx51: broken build Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
[PATCH 4.9 144/152] watchdog: s3c2410: Fix infinite interrupt in soft mode Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
[PATCH 4.9 135/152] arm: kernel: Add SMC structure parameter Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
[PATCH 4.9 130/152] ASoC: Intel: cht_bsw_rt5645: add Baytrail MCLK support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:30 +0200
[PATCH 4.9 028/152] brcmfmac: use local iftype avoiding use-after-free of virtual interface Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 099/152] ACPI / sysfs: Provide quirk mechanism to prevent GPE flooding Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 027/152] mac80211: unconditionally start new netdev queues with iTXQ support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 081/152] PCI/ACPI: Check for platform-specific MCFG quirks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 030/152] metag/usercopy: Fix alignment error checking Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 104/152] drm/i915: more .is_mobile cleanups for BDW Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 029/152] metag/usercopy: Drop unused macros Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 067/152] clocksource/drivers/arm_arch_timer: Dont assume clock runs in suspend Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 069/152] HID: sensor-hub add quirk for Microsoft Surface 3 Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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[PATCH 4.9 102/152] drm/edid: constify edid quirk list Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 094/152] HID: asus: Add i2c touchpad support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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[PATCH 4.9 082/152] PCI: Add MCFG quirks for Qualcomm QDF2432 host controller Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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[PATCH 4.9 096/152] HID: microsoft: Add Surface 4 type cover pro 4 not JP versions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
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[PATCH 4.9 085/152] PCI: Add MCFG quirks for Cavium ThunderX pass2.x host controller Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 089/152] scsi: ufs: add quirk to increase host PA_SaveConfigTime Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 072/152] HID: multitouch: do not retrieve all reports for all devices Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 095/152] HID: asus: Fix keyboard support Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 097/152] HID: multitouch: enable the Surface 4 Type Cover Pro (JP) to report multitouch data Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 076/152] x86/intel_idle: Add CPU model 0x4a (Atom Z34xx series) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 103/152] drm/i915: fix INTEL_BDW_IDS definition Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 031/152] metag/usercopy: Add early abort to copy_to_user Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 090/152] ALSA: usb-audio: add implicit fb quirk for Axe-Fx II Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 098/152] nvme: simplify stripe quirk Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 066/152] net/mlx4_core: Use device ID defines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 105/152] drm/i915: actually drive the BDW reserved IDs Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 065/152] arm64: dts: hisi: fix hip06 sas am-max-trans quirk Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 084/152] PCI: thunder-pem: Factor out resource lookup Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:40 +0200
[PATCH 4.9 034/152] metag/usercopy: Fix src fixup in from user rapf loops Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 046/152] MIPS: Force o32 fp64 support on 32bit MIPS64r6 kernels Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 057/152] drm/sun4i: tcon: Move SoC specific quirks to a DT matched data structure Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 039/152] powerpc: Dont try to fix up misaligned load-with-reservation instructions Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 045/152] s390/uaccess: get_user() should zero on failure (again) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 062/152] HID: i2c-hid: add a simple quirk to fix device defects Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 049/152] MIPS: Lantiq: fix missing xbar kernel panic Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 052/152] MIPS: Flush wrong invalid FTLB entry for huge page Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 037/152] powerpc/mm: Add missing global TLB invalidate if cxl is active Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 036/152] powerpc: Disable HFSCR[TM] if TM is not supported Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 038/152] powerpc/64: Fix flush_(d|i)cache_range() called from modules Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 058/152] drm/sun4i: Add compatible strings for A31/A31s display pipelines Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 044/152] s390/decompressor: fix initrd corruption caused by bss clear Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 054/152] Documentation: stable-kernel-rules: fix stable-tag format Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 059/152] drm/sun4i: Add compatible string for A31/A31s TCON (timing controller) Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 043/152] xtensa: make __pa work with uncached KSEG addresses Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 053/152] MIPS: c-r4k: Fix Loongson-3s vcache/scache waysize calculation Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 025/152] xfs: Honor FALLOC_FL_KEEP_SIZE when punching ends of files Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 056/152] random: use chacha20 for get_random_int/long Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 032/152] metag/usercopy: Zero rest of buffer from copy_from_user Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 042/152] nios2: reserve boot memory for device tree Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 008/152] drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 19:50 +0200
[PATCH 4.9 015/152] arm64: mm: unaligned access by user-land should be received as SIGBUS Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 012/152] arm/arm64: KVM: Take mmap_sem in kvm_arch_prepare_memory_region Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 005/152] drm/vmwgfx: avoid calling vzalloc with a 0 size in vmw_get_cap_3d_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 014/152] iio: bmg160: reset chip when probing Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 021/152] dm verity fec: fix bufio leaks Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 010/152] staging: android: ashmem: lseek failed due to no FMODE_LSEEK. Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 013/152] kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 009/152] sysfs: be careful of error returns from ops->show() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 011/152] arm/arm64: KVM: Take mmap_sem in stage2_unmap_vm Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 004/152] drm/vmwgfx: NULL pointer dereference in vmw_surface_define_ioctl() Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 016/152] cfg80211: check rdev resume callback only for registered wiphy Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 017/152] Reset TreeId to zero on SMB2 TREE_CONNECT Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 020/152] dm verity fec: limit error correction recursion Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 019/152] ptrace: fix PTRACE_LISTEN race corrupting task->state Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
[PATCH 4.9 001/152] ppdev: check before attaching port Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-10 20:00 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Shuah Khan <shuahkh@osg.samsung.com> - 2017-04-10 22:40 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 01:00 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 06:40 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 05:10 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 06:50 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Tony Lindgren <tony@atomide.com> - 2017-04-11 17:20 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-12 03:50 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-12 08:30 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 07:10 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Guenter Roeck <linux@roeck-us.net> - 2017-04-11 14:50 +0200
Re: [PATCH 4.9 000/152] 4.9.22-stable review Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2017-04-11 16:40 +0200
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