commit 13ddc12768ca98d36ec03bfa21a30b3ebc91673d openeuler.
The period of the secure timer is set to 3s by BIOS. That means the
secure timer interrupt will trigger every 3 seconds. To further decrease
the NMI watchdog's effect on performance, this patch set the period of
the secure timer base on 'watchdog_thresh'. This variable is initiallized
to 10s. We can also set the period at runtime by modifying
'/proc/sys/kernel/watchdog_thresh'
Signed-off-by: huwentao <huwentao19@h-partners.com>
commit 75ac7be96da43f12bad247de69137500e02fd37f openeuler.
When we panic in hardlockup, the secure timer interrupt remains activate
because firmware clear eoi after dispatch is completed. This will cause
arm_arch_timer interrupt failed to trigger in the second kernel.
This patch add a new SMC helper to clear eoi of a certain interrupt and
clear eoi of the secure timer before booting the second kernel.
Signed-off-by: huwentao <huwentao19@h-partners.com>
commit cfaccce945988392d70ad42924e76f330c25ab9a openeuler.
NMI Watchdog need to enable the event for each core individually. But the
existing public api 'sdei_event_enable' enable events for all cores when
the event type is private.
Signed-off-by: huwentao <huwentao19@h-partners.com>
commit 860744b94a10a159562fc491fd7f3ea1388965c1 openeuler.
This patch add a interrupt binding api function which returns the binded
event number.
Signed-off-by: huwentao <huwentao19@h-partners.com>
If the GHES notification type is SDEI, register the provided event
using the SDEI-GHES helper.
SDEI may be one of two types of event, normal and critical. Critical
events can interrupt normal events, so these must have separate
fixmap slots and locks in case both event types are in use.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
APEI's Generic Hardware Error Source structures do not describe
whether the SDEI event is shared or private, as this information is
discoverable via the API.
GHES needs to know whether an event is normal or critical to avoid
sharing locks or fixmap entries, but GHES shouldn't have to know about
the SDEI API.
Add a helper to register the GHES using the appropriate normal or
critical callback.
Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The Software Delegated Exception Interface (SDEI) is an ARM standard
for registering callbacks from the platform firmware into the OS.
This is typically used to implement firmware notifications (such as
firmware-first RAS) or promote an IRQ that has been promoted to a
firmware-assisted NMI.
Add the code for detecting the SDEI version and the framework for
registering and unregistering events. Subsequent patches will add the
arch-specific backend code and the necessary power management hooks.
Only shared events are supported, power management, private events and
discovery for ACPI systems will be added by later patches.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Xiongfeng Wang