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| author | Gavin Shan <gshan@redhat.com> | 2023-01-27 02:54:50 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2023-01-29 21:46:11 +0300 |
| commit | 2f8b1ad2228a7f1f1e2458864f4bfc1cbdf511ed (patch) | |
| tree | a9c7d79283e80e7b610cc5d143c827ad89d113ce | |
| parent | a23eaf9368aafa4defcc8904b20391b6ea07bb1e (diff) | |
| download | linux-2f8b1ad2228a7f1f1e2458864f4bfc1cbdf511ed.tar.xz | |
KVM: arm64: Allow no running vcpu on restoring vgic3 LPI pending status
We don't have a running VCPU context to restore vgic3 LPI pending status
due to command KVM_DEV_ARM_{VGIC_GRP_CTRL, ITS_RESTORE_TABLES} on KVM
device "kvm-arm-vgic-its".
Use vgic_write_guest_lock() to restore vgic3 LPI pending status.
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230126235451.469087-4-gshan@redhat.com
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 8 | ||||
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic-v3.c | 2 |
2 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index dbed78a9c31b..25e9095596af 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -8070,9 +8070,11 @@ considering the state as complete. VMM needs to ensure that the dirty state is final and avoid missing dirty pages from another ioctl ordered after the bitmap collection. -NOTE: One example of using the backup bitmap is saving arm64 vgic/its -tables through KVM_DEV_ARM_{VGIC_GRP_CTRL, ITS_SAVE_TABLES} command on -KVM device "kvm-arm-vgic-its" when dirty ring is enabled. +NOTE: Multiple examples of using the backup bitmap: (1) save vgic/its +tables through command KVM_DEV_ARM_{VGIC_GRP_CTRL, ITS_SAVE_TABLES} on +KVM device "kvm-arm-vgic-its". (2) restore vgic/its tables through +command KVM_DEV_ARM_{VGIC_GRP_CTRL, ITS_RESTORE_TABLES} on KVM device +"kvm-arm-vgic-its". VGICv3 LPI pending status is restored. 8.30 KVM_CAP_XEN_HVM -------------------- diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c index 2624963cb95b..3dab286ed23f 100644 --- a/arch/arm64/kvm/vgic/vgic-v3.c +++ b/arch/arm64/kvm/vgic/vgic-v3.c @@ -339,7 +339,7 @@ retry: if (status) { /* clear consumed data */ val &= ~(1 << bit_nr); - ret = kvm_write_guest_lock(kvm, ptr, &val, 1); + ret = vgic_write_guest_lock(kvm, ptr, &val, 1); if (ret) return ret; } |