[PATCH] KVM: arm64: Fix definition of PAGE_HYP_DEVICE

[Marc Zyngier]

On 2020-07-08 17:25, Will Deacon wrote:
> PAGE_HYP_DEVICE is intended to encode attribute bits for an EL2 stage-1
> pte mapping a device. Unfortunately, it includes PROT_DEVICE_nGnRE 
> which
> encodes attributes for EL1 stage-1 mappings such as UXN and nG, which 
> are
> RES0 for EL2, and DBM which is meaningless as TCR_EL2.HD is not set.
> 
> Fix the definition of PAGE_HYP_DEVICE so that it doesn't set RES0 bits
> at EL2.
> 
> Cc: Marc Zyngier <maz at kernel.org>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: James Morse <james.morse at arm.com>
> Cc: <stable at vger.kernel.org>
> Signed-off-by: Will Deacon <will at kernel.org>
> ---
> Marc -- I'm happy to take this as a fix via arm64 with your Ack.
> Please just let me know.
> 
>  arch/arm64/include/asm/pgtable-prot.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Acked-by: Marc Zyngier <maz at kernel.org>

Thanks for fixing this!

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