| Message ID | 20191211154206.46260-13-broonie@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: ARMv8.5-A: Branch Target Identification support | expand |
On Wed, Dec 11, 2019 at 03:42:06PM +0000, Mark Brown wrote: > v8.5-BTI introduces the GP field in stage 1 translation tables which > indicates that blocks and pages with it set are guarded pages for which > branch target identification checks should be performed. Decode this > when dumping the page tables to aid debugging. > > Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 0a920b538a89..880bd5160dc2 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -143,6 +143,11 @@ static const struct prot_bits pte_bits[] = { .val = PTE_UXN, .set = "UXN", .clear = " ", + }, { + .mask = PTE_GP, + .val = PTE_GP, + .set = "GP", + .clear = " ", }, { .mask = PTE_ATTRINDX_MASK, .val = PTE_ATTRINDX(MT_DEVICE_nGnRnE),
v8.5-BTI introduces the GP field in stage 1 translation tables which indicates that blocks and pages with it set are guarded pages for which branch target identification checks should be performed. Decode this when dumping the page tables to aid debugging. Signed-off-by: Mark Brown <broonie@kernel.org> --- arch/arm64/mm/dump.c | 5 +++++ 1 file changed, 5 insertions(+)