diff options
| author | Peter Shier <pshier@google.com> | 2020-05-26 14:51:06 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-06-01 04:26:10 -0400 |
| commit | 850448f35aaf45215276468d63c91ab1e230cf06 (patch) | |
| tree | a47f2d1d880e70bb4fe7cf989b9dcc32aa699b42 /arch/x86/include/uapi | |
| parent | f7d31e65368aeef973fab788aa22c4f1d5a6af66 (diff) | |
| download | linux-850448f35aaf45215276468d63c91ab1e230cf06.tar.bz2 | |
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 'arch/x86/include/uapi')
| -rw-r--r-- | arch/x86/include/uapi/asm/kvm.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h index 12075a9de1c1..17c5a038f42d 100644 --- a/arch/x86/include/uapi/asm/kvm.h +++ b/arch/x86/include/uapi/asm/kvm.h @@ -400,6 +400,7 @@ struct kvm_sync_regs { #define KVM_STATE_NESTED_SVM_VMCB_SIZE 0x1000 +#define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001 struct kvm_vmx_nested_state_data { __u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; @@ -407,8 +408,10 @@ struct kvm_vmx_nested_state_data { }; struct kvm_vmx_nested_state_hdr { + __u32 flags; __u64 vmxon_pa; __u64 vmcs12_pa; + __u64 preemption_timer_deadline; struct { __u16 flags; |