On 2021-03-11 11:15, Andrew Jones wrote:
On Thu, Mar 11, 2021 at 10:00:16AM +0000, Marc Zyngier wrote:
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.