Subject: [PATCH 2/2 v2] ARM: KVM: user_mem_abort: support stage 2 MMIO page mapping

From: [email-masked] (Will Deacon)
Date: Thu, 26 Jun 2014 09:46:26 +0100

On Thu, Jun 26, 2014 at 01:45:51AM +0100, Kim Phillips wrote:
> From: Kim Phillips <[email-masked]>
> 
> 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 <[email-masked]>
> Acked-by: Christoffer Dall <[email-masked]>
> ---
> Hi, here's a v2, upon request:
> 
> - rebased onto today's mainline ToT
> - mmu.o-build tested only (ToT build doesn't complete)
> - made commit text less terse
> - added Christoffer's ack

Thanks for reposting this so quickly!

  Acked-by: Will Deacon <[email-masked]>

Will