On 2/14/25 2:13 AM, Steven Price wrote:
If the host attempts to access granules that have been delegated for use in a realm these accesses will be caught and will trigger a Granule Protection Fault (GPF). A fault during a page walk signals a bug in the kernel and is handled by oopsing the kernel. A non-page walk fault could be caused by user space having access to a page which has been delegated to the kernel and will trigger a SIGBUS to allow debugging why user space is trying to access a delegated page. Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> Signed-off-by: Steven Price <steven.price@xxxxxxx> --- Changes since v2: * Include missing "Granule Protection Fault at level -1" --- arch/arm64/mm/fault.c | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-)
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
