On 2021-03-25 09:14, Shameer Kolothum wrote:
From: Marc Zyngier <[email protected]>
commit 9739f6ef053f104a997165701c6e15582c4307ee upstream.
It looks like we have broken firmware out there that wrongly advertises
a GICv2 compatibility interface, despite the CPUs not being able to
deal
with it.
To work around this, check that the CPU initialising KVM is actually
able
to switch to MMIO instead of system registers, and use that as a
precondition to enable GICv2 compatibility in KVM.
Note that the detection happens on a single CPU. If the firmware is
lying *and* that the CPUs are asymetric, all hope is lost anyway.
Cc: [email protected] #5.10
Reported-by: Shameerali Kolothum Thodi
<[email protected]>
Tested-by: Shameer Kolothum <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Signed-off-by: Shameer Kolothum <[email protected]>
Please hold on on that.
This patch causes a regression, and needs a fix that is currently queued
for 5.12 [1]. Once this hits upstream, please add the fix to the series
and post it as a whole.
Thanks,
M.
[1] https://lore.kernel.org/r/[email protected]
--
Jazz is not dead. It just smells funny...
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