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@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
---
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@xxxxxxxxxx>
Thanks for fixing this!
M.
--
Jazz is not dead. It just smells funny...
