On 10/07/20 11:05, Stefano Garzarella wrote:
> Hi Paolo,
>
> On Thu, Jul 09, 2020 at 01:28:01PM -0400, Paolo Bonzini wrote:
>> Commit 850448f35aaf ("KVM: nVMX: Fix VMX preemption timer migration",
>> 2020-06-01) accidentally broke nVMX live migration from older version
>> by changing the userspace ABI. Restore it and, while at it, ensure
>> that vmx->nested.has_preemption_timer_deadline is always initialized
>> according to the KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE flag.
>>
>> Cc: Makarand Sonare <[email protected]>
>> Fixes: 850448f35aaf ("KVM: nVMX: Fix VMX preemption timer migration")
>> Reviewed-by: Jim Mattson <[email protected]>
>> Signed-off-by: Paolo Bonzini <[email protected]>
>> ---
>> v1->v2: coding style [Jim]
>>
>> arch/x86/include/uapi/asm/kvm.h | 5 +++--
>> arch/x86/kvm/vmx/nested.c | 1 +
>> 2 files changed, 4 insertions(+), 2 deletions(-)
>>
>> diff --git a/arch/x86/include/uapi/asm/kvm.h
>> b/arch/x86/include/uapi/asm/kvm.h
>> index 17c5a038f42d..0780f97c1850 100644
>> --- a/arch/x86/include/uapi/asm/kvm.h
>> +++ b/arch/x86/include/uapi/asm/kvm.h
>> @@ -408,14 +408,15 @@ 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;
>> } smm;
>> +
>> + __u32 flags;
>> + __u64 preemption_timer_deadline;
>> };
>>
>
> Should we update also Documentation/virt/kvm/api.rst to be consistent?
Yes, of course. Thanks for pointing it out.
Paolo
