Messages in this thread | | | Date | Wed, 17 Mar 2021 14:04:36 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH v3 1/1] irqchip/gic-v4.1: Disable vSGI upon (GIC CPUIF < v4.1) detection |
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Hi Lorenzo,
Wed, 17 Mar 2021 10:07:19 +0000, Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> wrote: > > 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>
Does it need to go in as a fix? or can it just be pushed into 5.13? Given that there is no such HW in the wild just yet, I'm inclined to do the latter...
Thanks,
M.
-- Without deviation from the norm, progress is not possible.
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