[PATCH v2 0/2] KVM: arm64: vgic-v3: Missing check for redist region above the VM IPA size

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KVM doesn't check for redist regions that extend partially above the
VM-specified IPA (phys_size).  This can happen when using the
KVM_VGIC_V3_ADDR_TYPE_REDIST or KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION attribute
to set a new region that extends partially above phys_size (with the base below
phys_size).  The issue is that vcpus can potentially run into a situation where
some redistributors are addressable and others are not.

Patch 1 adds the missing checks, and patch 2 adds a test into aarch64/vgic_init.

Changes:
v2: adding a test for KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, and returning E2BIG
    instead of EINVAL (thanks Alexandru and Eric).

Ricardo Koller (2):
  KVM: arm64: vgic: check redist region is not above the VM IPA size
  KVM: arm64: selftests: tests for vgic redist regions above the VM IPA
    size

 arch/arm64/kvm/vgic/vgic-mmio-v3.c            |  7 ++-
 arch/arm64/kvm/vgic/vgic-v3.c                 |  4 ++
 .../testing/selftests/kvm/aarch64/vgic_init.c | 52 +++++++++++++++++++
 3 files changed, 62 insertions(+), 1 deletion(-)

-- 
2.33.0.309.g3052b89438-goog




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