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    SubjectRe: [PATCHv7 5/8] kvm: eoi msi documentation
    On 06/14/2012 04:53 PM, Michael S. Tsirkin wrote:
    > Document the new EOI MSR. Couldn't decide whether this change belongs
    > conceptually on guest or host side, so a separate patch.
    >
    > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
    > ---
    > Documentation/virtual/kvm/msr.txt | 32 ++++++++++++++++++++++++++++++++
    > 1 file changed, 32 insertions(+)
    >
    > diff --git a/Documentation/virtual/kvm/msr.txt b/Documentation/virtual/kvm/msr.txt
    > index 96b41bd..6ae5a85 100644
    > --- a/Documentation/virtual/kvm/msr.txt
    > +++ b/Documentation/virtual/kvm/msr.txt
    > @@ -223,3 +223,35 @@ MSR_KVM_STEAL_TIME: 0x4b564d03
    > steal: the amount of time in which this vCPU did not run, in
    > nanoseconds. Time during which the vcpu is idle, will not be
    > reported as steal time.
    > +
    > +MSR_KVM_EOI_EN: 0x4b564d04
    > + data: Bit 0 is 1 when PV end of interrupt is enabled on the vcpu; 0
    > + when disabled. When enabled, bits 63-1 hold 2-byte aligned physical address
    > + of a 2 byte memory area which must be in guest RAM and must be zeroed.

    2 byte aligned means we must never access it on the host with a >2 byte
    instruction, or we risk touching unmapped memory.


    --
    error compiling committee.c: too many arguments to function




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