# RE: \[PATCH v5 9/9\] Documentation: virtual: kvm: Support vcpu preempted check

- From: David Laight \<hidden\>
- Date: 2016-10-21 11:30:37 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2016/10/4858484
- Thread: https://ratatoskr.run/linuxppc-dev/2016/10/4857791/t.md

```text
From: Pan Xinhui
> Sent: 20 October 2016 22:28
> Commit ("x86, kvm: support vcpu preempted check") add one field "__u8
> preempted" into struct kvm_steal_time. This field tells if one vcpu is
> running or not.
>=20
> It is zero if 1) some old KVM deos not support this filed. 2) the vcpu is
> preempted. Other values means the vcpu has been preempted.
>=20
> Signed-off-by: Pan Xinhui <redacted>
> ---
>  Documentation/virtual/kvm/msr.txt | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
>=20
> diff --git a/Documentation/virtual/kvm/msr.txt b/Documentation/virtual/kv=
m/msr.txt
> index 2a71c8f..3376f13 100644
> --- a/Documentation/virtual/kvm/msr.txt
> +++ b/Documentation/virtual/kvm/msr.txt
> @@ -208,7 +208,8 @@ MSR_KVM_STEAL_TIME: 0x4b564d03
>  		__u64 steal;
>  		__u32 version;
>  		__u32 flags;
> -		__u32 pad[12];
> +		__u8  preempted;
> +		__u32 pad[11];
>  	}

I think I'd be explicit about the 3 pad bytes you've left.

	David
```