On Mon, Mar 15, 2021 at 11:46:46AM +0000, Marc Zyngier wrote:
> Commit 262b003d059c6671601a19057e9fe1a5e7f23722 upstream.
>
> 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: c3058d5da222 ("arm/arm64: KVM: Ensure memslots are within KVM_PHYS_SIZE")
> Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
> Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # 4.4, 4.9
> Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
> Link: https://lore.kernel.org/r/20210311100016.3830038-3-maz@xxxxxxxxxx
> ---
> arch/arm/kvm/mmu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
That worked, now queued up, thanks!
greg k-h
