On 9 December 2014 at 12:26, Christoffer Dall
<christoffer.dall@xxxxxxxxxx> wrote:
> From: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
>
> Instead of using kvm_is_mmio_pfn() to decide whether a host region
> should be stage 2 mapped with device attributes, add a new static
> function kvm_is_device_pfn() that disregards RAM pages with the
> reserved bit set, as those should usually not be mapped as device
> memory.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
As I mentioned last week, this patch (and the next one) are already in
3.18 so unless there is some policy I am unaware of, these do not have
to be submitted again.
--
Ard.
> ---
> arch/arm/kvm/mmu.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
> index 57a403a..b007438 100644
> --- a/arch/arm/kvm/mmu.c
> +++ b/arch/arm/kvm/mmu.c
> @@ -834,6 +834,11 @@ static bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
> return kvm_vcpu_dabt_iswrite(vcpu);
> }
>
> +static bool kvm_is_device_pfn(unsigned long pfn)
> +{
> + return !pfn_valid(pfn);
> +}
> +
> static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
> struct kvm_memory_slot *memslot, unsigned long hva,
> unsigned long fault_status)
> @@ -904,7 +909,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
> if (is_error_pfn(pfn))
> return -EFAULT;
>
> - if (kvm_is_mmio_pfn(pfn))
> + if (kvm_is_device_pfn(pfn))
> mem_type = PAGE_S2_DEVICE;
>
> spin_lock(&kvm->mmu_lock);
> --
> 2.1.2.330.g565301e.dirty
>
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