From: Mark Rutland <mark.rutland@arm.com>
To: linux-arm-kernel@lists.infradead.org, Marc Zyngier <maz@kernel.org>
Cc: mark.rutland@arm.com, tglx@linutronix.de, will.deacon@arm.com
Subject: [PATCH 0/3] irqchip/gic-v3: pseudo-NMI fixes
Date: Fri, 13 May 2022 14:30:35 +0100 [thread overview]
Message-ID: <20220513133038.226182-1-mark.rutland@arm.com> (raw)
These patches fix a couple of issues with the way GICv3 pseudo-NMIs are
handled:
* The first patch adds a barrier we missed from NMI handling due to an
oversight.
* The second patch refactors some logic around reads from ICC_IAR1_EL1
and adds commentary to explain what's going on.
* The third patch descends into madness, reworking gic_handle_irq() to
consistently manage ICC_PMR_EL1 + DAIF and avoid cases where these can
be left in an inconsistent state while softirqs are processed.
I've given these a beating in a QEMU KVM VM on a ThunderX2 host.
Note that arm64 has some orthogonal issues with lockdep which are fixed
by:
https://lore.kernel.org/linux-arm-kernel/20220511131733.4074499-1-mark.rutland@arm.com/
... so to test with lockdep enabled it is necessary to apply that
series too.
Thanks,
Mark.
Mark Rutland (3):
irqchip/gic-v3: ensure pseudo-NMIs have an ISB between ack and
handling
irqchip/gic-v3: refactor ISB + EOIR at ack time
irqchip/gic-v3: fix priority mask handling
arch/arm/include/asm/arch_gicv3.h | 7 +-
arch/arm64/include/asm/arch_gicv3.h | 6 -
drivers/irqchip/irq-gic-v3.c | 183 ++++++++++++++++++----------
3 files changed, 121 insertions(+), 75 deletions(-)
--
2.30.2
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next reply other threads:[~2022-05-13 13:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-13 13:30 Mark Rutland [this message]
2022-05-13 13:30 ` [PATCH 1/3] irqchip/gic-v3: ensure pseudo-NMIs have an ISB between ack and handling Mark Rutland
2022-05-13 13:30 ` [PATCH 2/3] irqchip/gic-v3: refactor ISB + EOIR at ack time Mark Rutland
2022-05-13 13:30 ` [PATCH 3/3] irqchip/gic-v3: fix priority mask handling Mark Rutland
2022-05-13 13:45 ` Joey Gouly
2022-05-13 14:08 ` Mark Rutland
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