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Julien Thierry 17ce302f31 arm64: Fix interrupt tracing in the presence of NMIs 
In the presence of any form of instrumentation, nmi_enter() should be
done before calling any traceable code and any instrumentation code.

Currently, nmi_enter() is done in handle_domain_nmi(), which is much
too late as instrumentation code might get called before. Move the
nmi_enter/exit() calls to the arch IRQ vector handler.

On arm64, it is not possible to know if the IRQ vector handler was
called because of an NMI before acknowledging the interrupt. However, It
is possible to know whether normal interrupts could be taken in the
interrupted context (i.e. if taking an NMI in that context could
introduce a potential race condition).

When interrupting a context with IRQs disabled, call nmi_enter() as soon
as possible. In contexts with IRQs enabled, defer this to the interrupt
controller, which is in a better position to know if an interrupt taken
is an NMI.

Fixes: bc3c03ccb4 ("arm64: Enable the support of pseudo-NMIs")
Cc: <stable@vger.kernel.org> # 5.1.x-
Cc: Will Deacon <will.deacon@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2019-06-21 15:49:58 +01:00
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accessibility treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 70 2019-05-24 17:36:47 +02:00
acpi Power management fixes for 5.2-rc3 2019-05-31 10:38:35 -07:00
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base drivers: base: cacheinfo: Add variable to record max cache line size 2019-06-04 13:42:54 +01:00
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block for-linus-20190601 2019-06-02 09:27:44 -07:00
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crypto crypto: ux500 - fix license comment syntax error 2019-06-01 18:29:58 +02:00
dax libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
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firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-02 11:06:13 -07:00
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i2c Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-06-02 10:18:11 -07:00
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iio SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
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iommu drivers/iommu/intel-iommu.c: fix variable 'iommu' set but not used 2019-06-01 15:51:32 -07:00
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irqchip arm64: Fix interrupt tracing in the presence of NMIs 2019-06-21 15:49:58 +01:00
isdn SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
leds LED fix for 5.2-rc3 2019-06-02 10:14:25 -07:00
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nvdimm libnvdimm fixes v5.2-rc2 2019-05-25 10:11:23 -07:00
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pci PCI: PM: Avoid possible suspend-to-idle issue 2019-05-27 10:55:08 +02:00
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staging Staging/IIO driver fixes for 5.2-rc3 2019-05-31 08:31:45 -07:00
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thermal Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal 2019-06-02 10:16:09 -07:00
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tty vt/fbcon: deinitialize resources in visual_init() after failed memory allocation 2019-05-24 17:08:18 +02:00
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usb usbip: usbip_host: fix stub_dev lock context imbalance regression 2019-05-29 13:26:32 -07:00
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