Messages in this thread | | | Date | Wed, 15 Apr 2020 09:55:57 +0100 | From | Marc Zyngier <> | Subject | Re: [PATCH 3/8] arm64: cpufeature: Add CPU capability for AArch32 EL1 support |
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Hi Will,
On 2020-04-14 22:31, Will Deacon wrote: > Although we emit a "SANITY CHECK" warning and taint the kernel if we > detect a CPU mismatch for AArch32 support at EL1, we still online the > CPU with disastrous consequences for any running 32-bit VMs. > > Introduce a capability for AArch32 support at EL1 so that late onlining > of incompatible CPUs is forbidden. > > Signed-off-by: Will Deacon <will@kernel.org>
Definitely an improvement over the current situation, as the direct read of ID_AA64PFR0 was always a bit dodgy. Given that I'm pretty sure these new braindead SoCs are going to run an older version of the kernel, should we Cc stable for this?
Otherwise:
Acked-by: Marc Zyngier <maz@kernel.org>
M. -- Jazz is not dead. It just smells funny...
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