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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2014-11-10 08:33:55 +0000
committerLuis Henriques <luis.henriques@canonical.com>2015-05-20 13:25:49 +0100
commit8cd08171f09ddf116f9d9bfa56678cb5a52f2a6f (patch)
treef9ab891f832ca8a533883fa84b95bd569d66419b /arch/arm/kvm/mmu.c
parenta9a7b0e863951e237ebae32bc18050545ad14c6c (diff)
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arm/arm64: kvm: drop inappropriate use of kvm_is_mmio_pfn()
commit 07a9748c78cfc39b54f06125a216b67b9c8f09ed upstream. 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: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'arch/arm/kvm/mmu.c')
-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 222e59918d28..8cfb491776a9 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -755,6 +755,11 @@ 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 fault_status)
@@ -825,7 +830,7 @@ 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);