On Mon, Aug 19, 2024 at 10:17:52AM +0100, Catalin Marinas wrote:
> On Thu, Aug 01, 2024 at 01:06:45PM +0100, Mark Brown wrote:
> > +static bool is_invalid_gcs_access(struct vm_area_struct *vma, u64 esr)
> > +{
> > + if (unlikely(is_gcs_fault(esr))) {
> > + /* GCS accesses must be perf
On Thu, Aug 01, 2024 at 01:06:45PM +0100, Mark Brown wrote:
> diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
> index 451ba7cbd5ad..0973dd09f11a 100644
> --- a/arch/arm64/mm/fault.c
> +++ b/arch/arm64/mm/fault.c
> @@ -486,6 +486,14 @@ static void do_bad_area(unsigned long far, unsigned l
All GCS operations at EL0 must happen on a page which is marked as
having UnprivGCS access, including read operations. If a GCS operation
attempts to access a page without this then it will generate a data
abort with the GCS bit set in ESR_EL1.ISS2.
EL0 may validly generate such faults, for examp
