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| author | Zenghui Yu <yuzenghui@huawei.com> | 2019-12-20 12:18:33 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-01-19 17:05:11 +0100 |
| commit | 5f675c56ed262103b825cbab0e96c34fe681318d (patch) | |
| tree | bd6c1d75d34d9b1ba5abda3deaa4f40e90f6b36c /virt | |
| parent | KVM: arm/arm64: vgic-its: Fix restoration of unmapped collections (diff) | |
| download | linux-5f675c56ed262103b825cbab0e96c34fe681318d.tar.xz linux-5f675c56ed262103b825cbab0e96c34fe681318d.zip | |
KVM: arm/arm64: vgic: Handle GICR_PENDBASER.PTZ filed as RAZ
Although guest will hardly read and use the PTZ (Pending Table Zero)
bit in GICR_PENDBASER, let us emulate the architecture strictly.
As per IHI 0069E 9.11.30, PTZ field is WO, and reads as 0.
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20191220111833.1422-1-yuzenghui@huawei.com
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/vgic/vgic-mmio-v3.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index 7dfd15dbb308..ebc218840fc2 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c @@ -414,8 +414,11 @@ static unsigned long vgic_mmio_read_pendbase(struct kvm_vcpu *vcpu, gpa_t addr, unsigned int len) { struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu; + u64 value = vgic_cpu->pendbaser; - return extract_bytes(vgic_cpu->pendbaser, addr & 7, len); + value &= ~GICR_PENDBASER_PTZ; + + return extract_bytes(value, addr & 7, len); } static void vgic_mmio_write_pendbase(struct kvm_vcpu *vcpu, |