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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2014-11-10 11:33:55 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2014-11-26 16:40:45 +0300
commitbb55e9b131d70ab9e30d73ab1342ad4907f9e0de (patch)
treee916db821effc07fd1da1bf20c28048d5987c743 /arch
parent6b50f54064a02b77a7b990032b80234fee59bcd6 (diff)
downloadlinux-bb55e9b131d70ab9e30d73ab1342ad4907f9e0de.tar.xz
arm/arm64: kvm: drop inappropriate use of kvm_is_mmio_pfn()
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@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kvm/mmu.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 79d3fbfb5b0e..8664ff17cbbe 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -835,6 +835,11 @@ 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)
@@ -905,7 +910,7 @@ 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);