Marc Zyngier 694556d54f KVM: arm/arm64: Clean dcache to PoC when changing PTE due to CoW ... When triggering a CoW, we unmap the RO page via an MMU notifier (invalidate_range_start), and then populate the new PTE using another one (change_pte). In the meantime, we'll have copied the old page into the new one. The problem is that the data for the new page is sitting in the cache, and should the guest have an uncached mapping to that page (or its MMU off), following accesses will bypass the cache. In a way, this is similar to what happens on a translation fault: We need to clean the page to the PoC before mapping it. So let's just do that. This fixes a KVM unit test regression observed on a HiSilicon platform, and subsequently reproduced on Seattle. Fixes: a9c0e12ebe ("KVM: arm/arm64: Only clean the dcache on translation fault") Cc: stable@vger.kernel.org # v4.16+ Reported-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>		2018-09-07 15:05:40 +02:00
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hyp	kvm/arm fixes for 4.16, take 2	2018-03-19 17:43:01 +00:00
vgic	KVM: arm/arm64: vgic: Do not use spin_lock_irqsave/restore with irq disabled	2018-08-12 12:15:18 +01:00
aarch32.c	kvm/arm: use PSR_AA32 definitions	2018-07-05 17:24:15 +01:00
arch_timer.c	KVM: arm/arm64: Fix lost IRQs from emulated physcial timer when blocked	2018-07-31 07:53:20 +01:00
arm.c	KVM/arm updates for 4.19	2018-08-22 14:07:56 +02:00
mmio.c	KVM: Fix stack-out-of-bounds read in write_mmio	2017-12-18 12:57:01 +01:00
mmu.c	KVM: arm/arm64: Clean dcache to PoC when changing PTE due to CoW	2018-09-07 15:05:40 +02:00
perf.c	KVM: arm/arm64: Move shared files to virt/kvm/arm	2017-05-04 13:57:26 +02:00
pmu.c	KVM: arm64: Rewrite system register accessors to read/write functions	2018-03-19 10:53:16 +00:00
psci.c	sched/swait: Rename to exclusive	2018-06-20 11:35:56 +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