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| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-06-09 14:49:55 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2017-06-15 11:45:06 +0300 |
| commit | e7f1d1eef482150a64a6e6ad8faf40f8f97eed67 (patch) | |
| tree | 775d0180010de525234429766897b116b09ef769 /virt/kvm | |
| parent | 2873b5082c5fbe2037f12e8d2abc8ad8f8d82a1b (diff) | |
| download | linux-e7f1d1eef482150a64a6e6ad8faf40f8f97eed67.tar.xz | |
KVM: arm64: Log an error if trapping a read-from-write-only GICv3 access
A read-from-write-only GICv3 access should UNDEF at EL1. But since
we're in complete paranoia-land with broken CPUs, let's assume the
worse and gracefully handle the case.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/arm/hyp/vgic-v3-sr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c index 15b557697086..b26ce58b012a 100644 --- a/virt/kvm/arm/hyp/vgic-v3-sr.c +++ b/virt/kvm/arm/hyp/vgic-v3-sr.c @@ -980,6 +980,8 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu) break; case SYS_ICC_EOIR0_EL1: case SYS_ICC_EOIR1_EL1: + if (unlikely(is_read)) + return 0; fn = __vgic_v3_write_eoir; break; case SYS_ICC_GRPEN1_EL1: @@ -1039,6 +1041,8 @@ int __hyp_text __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu) fn = __vgic_v3_write_bpr0; break; case SYS_ICC_DIR_EL1: + if (unlikely(is_read)) + return 0; fn = __vgic_v3_write_dir; break; case SYS_ICC_RPR_EL1: |