Marc Zyngier 9408013caa KVM: arm/arm64: Properly handle faulting of device mappings ... commit 6d674e28f6 upstream. A device mapping is normally always mapped at Stage-2, since there is very little gain in having it faulted in. Nonetheless, it is possible to end-up in a situation where the device mapping has been removed from Stage-2 (userspace munmaped the VFIO region, and the MMU notifier did its job), but present in a userspace mapping (userpace has mapped it back at the same address). In such a situation, the device mapping will be demand-paged as the guest performs memory accesses. This requires to be careful when dealing with mapping size, cache management, and to handle potential execution of a device mapping. Reported-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Tested-by: Alexandru Elisei <alexandru.elisei@arm.com> Reviewed-by: James Morse <james.morse@arm.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191211165651.7889-2-maz@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-12-31 16:46:24 +01:00
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hyp	KVM: arm: vgic-v3: Mark expected switch fall-through	2019-07-26 15:37:11 +01:00
vgic	KVM: arm/arm64: vgic: Don't rely on the wrong pending table	2019-12-13 08:43:00 +01:00
aarch32.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
arch_timer.c	KVM: arm64: Migrate _elx sysreg accessors to msr_s/mrs_s	2019-07-05 13:57:25 +01:00
arm.c	KVM: arm/arm64: vgic: Allow more than 256 vcpus for KVM_IRQ_LINE	2019-09-09 12:29:09 +01:00
mmio.c	KVM: arm/arm64: Only skip MMIO insn once	2019-08-22 13:19:56 +01:00
mmu.c	KVM: arm/arm64: Properly handle faulting of device mappings	2019-12-31 16:46:24 +01:00
perf.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
pmu.c	KVM: arm64: pmu: Reset sample period on overflow handling	2019-10-20 10:47:07 +01:00
psci.c	KVM: arm/arm64: Add save/restore support for firmware workaround state	2019-07-05 13:56:27 +01:00
trace.h	KVM: arm/arm64: Fix TRACE_INCLUDE_PATH	2019-02-19 21:05:51 +00:00