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authorLorenzo Pieralisi <lorenzo.pieralisi@arm.com>2021-03-17 10:07:19 +0000
committerMarc Zyngier <maz@kernel.org>2021-04-22 15:55:21 +0100
commit46135d6f878ab00261d4a2082d620bfb41019aab (patch)
tree8eaa3ebe27414bcf3116aab3143b415ae0d2b6c8 /arch/arm/mach-pxa/pxa_cplds_irqs.c
parenta6992bbe9774e044d3d0f973593d655c53efe089 (diff)
irqchip/gic-v4.1: Disable vSGI upon (GIC CPUIF < v4.1) detection
GIC CPU interfaces versions predating GIC v4.1 were not built to accommodate vINTID within the vSGI range; as reported in the GIC specifications (8.2 "Changes to the CPU interface"), it is CONSTRAINED UNPREDICTABLE to deliver a vSGI to a PE with ID_AA64PFR0_EL1.GIC < b0011. Check the GIC CPUIF version by reading the SYS_ID_AA64_PFR0_EL1. Disable vSGIs if a CPUIF version < 4.1 is detected to prevent using vSGIs on systems where they may misbehave. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Marc Zyngier <maz@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210317100719.3331-2-lorenzo.pieralisi@arm.com
Diffstat (limited to 'arch/arm/mach-pxa/pxa_cplds_irqs.c')
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