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@kernel.org Cc: Catalin Marinas catalin.marinas@arm.com Cc: James Morse james.morse@arm.com Cc: stable@vger.kernel.org Signed-off-by: Will Deacon will@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@kernel.org
Thanks for fixing this!
M.