Re: [PATCH 0/8] Relax sanity checking for mismatched AArch32 EL1

From: Sai Prakash Ranjan
Date: Thu Apr 16 2020 - 07:46:54 EST


On 2020-04-16 14:09, Sai Prakash Ranjan wrote:
On 2020-04-15 03:01, Will Deacon wrote:
Hi all,

For better or worse, there are SoCs in production where some, but not
all of the CPUs, support AArch32 at EL1 and above. Right now, that
results in "SANITY CHECK" warnings during boot and an unconditional
kernel taint.

This patch series tries to do a bit better: the only time we care about
AArch32 at EL1 is for KVM, so rather than throw our toys out of the
pram, we can instead just disable support for 32-bit guests on these
systems. In the unlikely scenario of a late CPU hotplug being the first
time we notice that AArch32 is not available, then we fail the hotplug
(right now we let the thing come online, which leads to hilarious
results for any pre-existing 32-bit guests).

Feedback welcome,

Will


Thanks Will, tested this series on QCOM SC7180 and SM8150 SoCs.

For the entire series,

Tested-by: saiprakash.ranjan@xxxxxxxxxxxxxx


Urgh sorry, it should be

Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>

-Sai
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