[PATCH v5 9/9] Documentation: virtual: kvm: Support vcpu preempted check
xinhui.pan at linux.vnet.ibm.com
Fri Oct 21 08:27:54 AEDT 2016
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.
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.
Signed-off-by: Pan Xinhui <xinhui.pan at linux.vnet.ibm.com>
Documentation/virtual/kvm/msr.txt | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/Documentation/virtual/kvm/msr.txt b/Documentation/virtual/kvm/msr.txt
index 2a71c8f..3376f13 100644
@@ -208,7 +208,8 @@ MSR_KVM_STEAL_TIME: 0x4b564d03
- __u32 pad;
+ __u8 preempted;
+ __u32 pad;
whose data will be filled in by the hypervisor periodically. Only one
@@ -232,6 +233,11 @@ MSR_KVM_STEAL_TIME: 0x4b564d03
nanoseconds. Time during which the vcpu is idle, will not be
reported as steal time.
+ preempted: indicate the VCPU who owns this struct is running or
+ not. Non-zero values mean the VCPU has been preempted. Zero
+ means the VCPU is not preempted. NOTE, it is always zero if the
+ the hypervisor doesn't support this field.
data: Bit 0 is 1 when PV end of interrupt is enabled on the vcpu; 0
when disabled. Bit 1 is reserved and must be zero. When PV end of
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