linux/virt/kvm/arm
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
..
hyp KVM: arm/arm64: Detangle kvm_mmu.h from kvm_hyp.h 2018-01-08 15:20:43 +01:00
vgic KVM: arm/arm64: Support VGIC dist pend/active changes for mapped IRQs 2018-01-02 10:05:46 +01:00
aarch32.c KVM: arm/arm64: Unify 32bit fault injection 2017-11-06 16:23:20 +01:00
arch_timer.c KVM: arm/arm64: Avoid work when userspace iqchips are not used 2018-01-02 10:05:46 +01:00
arm.c KVM: arm/arm64: Avoid work when userspace iqchips are not used 2018-01-02 10:05:46 +01:00
mmio.c KVM: arm/arm64: Move shared files to virt/kvm/arm 2017-05-04 13:57:26 +02:00
mmu.c KVM: arm/arm64: Preserve Exec permission across R/W permission faults 2018-01-08 15:20:46 +01:00
perf.c KVM: arm/arm64: Move shared files to virt/kvm/arm 2017-05-04 13:57:26 +02:00
pmu.c KVM: arm/arm64: PMU: Fix overflow interrupt injection 2017-07-25 14:18:01 +01:00
psci.c KVM: arm/arm64: change exit request to sleep request 2017-06-04 16:53:55 +02:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00