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| author | Marc Zyngier <marc.zyngier@arm.com> | 2012-12-12 14:42:09 +0000 |
|---|---|---|
| committer | Christoffer Dall <cdall@cs.columbia.edu> | 2013-03-06 15:48:44 -0800 |
| commit | cfe3950c2a19c1e1ad85b9dd2622617e309d2845 (patch) | |
| tree | bcdc30a0d28f61026663d10e9f8b7d9b0e97cd53 /arch/arm/kvm | |
| parent | 728d577d357c9caf83f75d0a38f318f343999cc2 (diff) | |
| download | linux-cfe3950c2a19c1e1ad85b9dd2622617e309d2845.tar.gz linux-cfe3950c2a19c1e1ad85b9dd2622617e309d2845.tar.bz2 linux-cfe3950c2a19c1e1ad85b9dd2622617e309d2845.zip | |
ARM: KVM: fix fault_ipa computing
The ARM ARM says that HPFAR reports bits [39:12] of the faulting
IPA, and we need to complement it with the bottom 12 bits of the
faulting VA.
This is always 12 bits, irrespective of the page size. Makes it
clearer in the code.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm')
| -rw-r--r-- | arch/arm/kvm/mmu.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index ec14269a791c..efded4f1a11b 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -606,8 +606,13 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run) goto out_unlock; } - /* Adjust page offset */ - fault_ipa |= kvm_vcpu_get_hfar(vcpu) & ~PAGE_MASK; + /* + * The IPA is reported as [MAX:12], so we need to + * complement it with the bottom 12 bits from the + * faulting VA. This is always 12 bits, irrespective + * of the page size. + */ + fault_ipa |= kvm_vcpu_get_hfar(vcpu) & ((1 << 12) - 1); ret = io_mem_abort(vcpu, run, fault_ipa); goto out_unlock; } |