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authorPeter Shier <pshier@google.com>2020-05-26 14:51:06 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2020-06-01 04:26:10 -0400
commit850448f35aaf45215276468d63c91ab1e230cf06 (patch)
treea47f2d1d880e70bb4fe7cf989b9dcc32aa699b42 /Documentation/virt
parentf7d31e65368aeef973fab788aa22c4f1d5a6af66 (diff)
KVM: nVMX: Fix VMX preemption timer migration
Add new field to hold preemption timer expiration deadline appended to struct kvm_vmx_nested_state_hdr. This is to prevent the first VM-Enter after migration from incorrectly restarting the timer with the full timer value instead of partially decayed timer value. KVM_SET_NESTED_STATE restarts timer using migrated state regardless of whether L1 sets VM_EXIT_SAVE_VMX_PREEMPTION_TIMER. Fixes: cf8b84f48a593 ("kvm: nVMX: Prepare for checkpointing L2 state") Signed-off-by: Peter Shier <pshier@google.com> Signed-off-by: Makarand Sonare <makarandsonare@google.com> Message-Id: <20200526215107.205814-2-makarandsonare@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/virt')
-rw-r--r--Documentation/virt/kvm/api.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index d0569db2b1e2..db22e834ce2a 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -4334,9 +4334,13 @@ Errors:
#define KVM_STATE_NESTED_VMX_SMM_GUEST_MODE 0x00000001
#define KVM_STATE_NESTED_VMX_SMM_VMXON 0x00000002
+#define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001
+
struct kvm_vmx_nested_state_hdr {
+ __u32 flags;
__u64 vmxon_pa;
__u64 vmcs12_pa;
+ __u64 preemption_timer_deadline;
struct {
__u16 flags;