Re: [Xen-devel] [PATCH 1/5] public/xen.h: add flags field to vcpu_time_info

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 17/03/16 16:12, Joao Martins wrote:
> This field has two possible flags (as of latest pvclock ABI
> shared with KVM).
>
> flags: bits in this field indicate extended capabilities
> coordinated between the guest and the hypervisor.  Specifically
> on KVM, availability of specific flags has to be checked in
> 0x40000001 cpuid leaf. On Xen, we don't have that but we can
> still check some of the flags after registering the time info
> page since a force_update_vcpu_system_time is performed.
>
> Current flags are:
>
>  flag bit   | cpuid bit    | meaning
> -------------------------------------------------------------
>             |              | time measures taken across
>      0      |      24      | multiple cpus are guaranteed to
>             |              | be monotonic
> -------------------------------------------------------------
>             |              | guest vcpu has been paused by
>      1      |     N/A      | the host
>             |              |
> -------------------------------------------------------------
>
> Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

Has the Linux maintainers file been patched to include xen-devel, to
avoid them altering our ABI unnoticed in the future?

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