ARM: KVM: user_mem_abort: support stage 2 MMIO page mapping

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commit b88657674d upstream.

A userspace process can map device MMIO memory via VFIO or /dev/mem,
e.g., for platform device passthrough support in QEMU.

During early development, we found the PAGE_S2 memory type being used
for MMIO mappings.  This patch corrects that by using the more strongly
ordered memory type for device MMIO mappings: PAGE_S2_DEVICE.

Signed-off-by: Kim Phillips <kim.phillips@linaro.org>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Kim Phillips 2014-06-26 01:45:51 +01:00 • committed by Greg Kroah-Hartman

parent 0aa06a1a54

commit e16bb584be

1 changed files with 8 additions and 3 deletions

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arch/arm/kvm/mmu.c

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