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authorGavin Shan <gshan@redhat.com>2023-01-27 07:54:50 +0800
committerMarc Zyngier <maz@kernel.org>2023-01-29 18:46:11 +0000
commit2f8b1ad2228a7f1f1e2458864f4bfc1cbdf511ed (patch)
treea9c7d79283e80e7b610cc5d143c827ad89d113ce /Documentation
parenta23eaf9368aafa4defcc8904b20391b6ea07bb1e (diff)
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
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/virt/kvm/api.rst8
1 files changed, 5 insertions, 3 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
--------------------