Messages in this thread | | | Date | Sun, 19 Jun 2011 12:49:47 +0300 | From | Avi Kivity <> | Subject | Re: [PATCH v2 2/7] KVM-HDR: KVM Steal time implementation |
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On 06/17/2011 01:20 AM, Glauber Costa wrote: > To implement steal time, we need the hypervisor to pass the guest information > about how much time was spent running other processes outside the VM. > This is per-vcpu, and using the kvmclock structure for that is an abuse > we decided not to make. > > In this patchset, I am introducing a new msr, KVM_MSR_STEAL_TIME, that > holds the memory area address containing information about steal time > > This patch contains the headers for it. I am keeping it separate to facilitate > backports to people who wants to backport the kernel part but not the > hypervisor, or the other way around. > > > index d079aed..79c12a7 100644 > --- a/Documentation/virtual/kvm/msr.txt > +++ b/Documentation/virtual/kvm/msr.txt > @@ -185,3 +185,36 @@ MSR_KVM_ASYNC_PF_EN: 0x4b564d02 > > Currently type 2 APF will be always delivered on the same vcpu as > type 1 was, but guest should not rely on that. > + > +MSR_KVM_STEAL_TIME: 0x4b564d03 > + > + data: 64-byte alignment physical address of a memory area which must be > + in guest RAM, plus an enable bit in bit 0. This memory is expected to > + hold a copy of the following structure: > + > + struct kvm_steal_time { > + __u64 steal; > + __u32 version; > + __u32 flags; > + __u32 pad[6];
Should be 12 to be a 64-byte structure, no?
-- error compiling committee.c: too many arguments to function
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