diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2014-07-31 12:42:18 +0200 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2014-07-31 15:59:40 +0200 |
| commit | fb3ec67942e92e5713e05b7691b277d0a0c0575d (patch) | |
| tree | 75d6d848aaef8d45f214013cf711d619c07d08fa /virt | |
| parent | arm64: KVM: GICv3: move system register access to msr_s/mrs_s (diff) | |
| download | linux-fb3ec67942e92e5713e05b7691b277d0a0c0575d.tar.xz linux-fb3ec67942e92e5713e05b7691b277d0a0c0575d.zip | |
KVM: arm64: GICv3: mandate page-aligned GICV region
Just like GICv2 was fixed in 63afbe7a0ac1
(kvm: arm64: vgic: fix hyp panic with 64k pages on juno platform),
mandate the GICV region to be both aligned on a page boundary and
its size to be a multiple of page size.
This prevents a guest from being able to poke at regions where we
have no idea what is sitting there.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic-v3.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic-v3.c b/virt/kvm/arm/vgic-v3.c index f01d44685720..1c2c8eef0599 100644 --- a/virt/kvm/arm/vgic-v3.c +++ b/virt/kvm/arm/vgic-v3.c @@ -215,6 +215,22 @@ int vgic_v3_probe(struct device_node *vgic_node, ret = -ENXIO; goto out; } + + if (!PAGE_ALIGNED(vcpu_res.start)) { + kvm_err("GICV physical address 0x%llx not page aligned\n", + (unsigned long long)vcpu_res.start); + ret = -ENXIO; + goto out; + } + + if (!PAGE_ALIGNED(resource_size(&vcpu_res))) { + kvm_err("GICV size 0x%llx not a multiple of page size 0x%lx\n", + (unsigned long long)resource_size(&vcpu_res), + PAGE_SIZE); + ret = -ENXIO; + goto out; + } + vgic->vcpu_base = vcpu_res.start; vgic->vctrl_base = NULL; vgic->type = VGIC_V3; |