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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 1/5] public/xen.h: add flags field to vcpu_time_info
On 03/21/2016 11:43 AM, Andrew Cooper wrote: > On 21/03/16 11:42, Joao Martins wrote: >> >> On 03/18/2016 08:12 PM, Andrew Cooper wrote: >>> 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> >>> >> Thanks! >> >>> Has the Linux maintainers file been patched to include xen-devel, to >>> avoid them altering our ABI unnoticed in the future? >>> >> Not yet, but I had planned to do so when sending the v2 of the linux side. >> But >> perhaps you want it beforehand? > > Just so long as it doesn't get lost. It definitely won't get lost. Joao _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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