On 2021-03-11 11:15, Andrew Jones wrote:

On Thu, Mar 11, 2021 at 10:00:16AM +0000, Marc Zyngier wrote:

quoted

When registering a memslot, we check the size and location of that
memslot against the IPA size to ensure that we can provide guest
access to the whole of the memory.

Unfortunately, this check rejects memslot that end-up at the exact
limit of the addressing capability for a given IPA size. For example,
it refuses the creation of a 2GB memslot at 0x8000000 with a 32bit
IPA space.

Fix it by relaxing the check to accept a memslot reaching the
limit of the IPA space.

Fixes: e55cac5bf2a9 ("kvm: arm/arm64: Prepare for VM specific stage2 
translations")

Isn't this actually fixing commit c3058d5da222 ("arm/arm64: KVM: Ensure
memslots are within KVM_PHYS_SIZE") ?

Ah, yes, that's indeed better (more backport work... ;-)

Thanks,

         M.
-- 
Jazz is not dead. It just smells funny...

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