2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2025-01-02 10:43:57 +08:00
linux-next/arch/arm/include
Marc Zyngier 7a3796d2ef KVM: arm/arm64: Preserve Exec permission across R/W permission faults
So far, we loose the Exec property whenever we take permission
faults, as we always reconstruct the PTE/PMD from scratch. This
can be counter productive as we can end-up with the following
fault sequence:

	X -> RO -> ROX -> RW -> RWX

Instead, we can lookup the existing PTE/PMD and clear the XN bit in the
new entry if it was already cleared in the old one, leadig to a much
nicer fault sequence:

	X -> ROX -> RWX

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2018-01-08 15:20:46 +01:00
..
asm KVM: arm/arm64: Preserve Exec permission across R/W permission faults 2018-01-08 15:20:46 +01:00
debug ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
uapi/asm bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00