Commit-ID: 3dd3e0ce7989b645eee0174b17f5095e187c7f28
Gitweb: http://git.kernel.org/tip/3dd3e0ce7989b645eee0174b17f5095e187c7f28
Author: Pan Xinhui <[email protected]>
AuthorDate: Wed, 2 Nov 2016 05:08:38 -0400
Committer: Ingo Molnar <[email protected]>
CommitDate: Tue, 22 Nov 2016 12:48:09 +0100
Documentation/virtual/kvm: Support the vCPU preemption check
Commit ("x86/kvm: support vCPU preemption check") added a new
struct kvm_steal_time::preempted field. This field tells us if
a vCPU is running or not.
It is zero if some old KVM does not support this field or if the vCPU
is not preempted. Other values means the vCPU has been preempted.
Signed-off-by: Pan Xinhui <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Radim Krčmář <[email protected]>
Acked-by: Paolo Bonzini <[email protected]>
Cc: [email protected]
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link:
http://lkml.kernel.org/r/[email protected]
[ Various typo fixes. ]
Signed-off-by: Ingo Molnar <[email protected]>
---
Documentation/virtual/kvm/msr.txt | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/virtual/kvm/msr.txt
b/Documentation/virtual/kvm/msr.txt
index 2a71c8f..0a9ea51 100644
--- a/Documentation/virtual/kvm/msr.txt
+++ b/Documentation/virtual/kvm/msr.txt
@@ -208,7 +208,9 @@ MSR_KVM_STEAL_TIME: 0x4b564d03
__u64 steal;
__u32 version;
__u32 flags;
- __u32 pad[12];
+ __u8 preempted;
+ __u8 u8_pad[3];
+ __u32 pad[11];
}
whose data will be filled in by the hypervisor periodically. Only one
@@ -232,6 +234,11 @@ 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.
+
MSR_KVM_EOI_EN: 0x4b564d04
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
