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| author | Wanpeng Li <wanpengli@tencent.com> | 2019-06-11 20:23:48 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-02 18:56:01 +0200 |
| commit | f85f6e7bc9682a6d8b342c010cd6aa58521fdeec (patch) | |
| tree | 5ca2f323769a35386e2a24b4c21d4c099778e950 /arch/x86/include | |
| parent | 11e349143e3289ab99f1b4858649f60703b7bf35 (diff) | |
| download | linux-f85f6e7bc9682a6d8b342c010cd6aa58521fdeec.tar.gz linux-f85f6e7bc9682a6d8b342c010cd6aa58521fdeec.tar.bz2 linux-f85f6e7bc9682a6d8b342c010cd6aa58521fdeec.zip | |
KVM: X86: Yield to IPI target if necessary
When sending a call-function IPI-many to vCPUs, yield if any of
the IPI target vCPUs was preempted, we just select the first
preempted target vCPU which we found since the state of target
vCPUs can change underneath and to avoid race conditions.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/uapi/asm/kvm_para.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/kvm_para.h b/arch/x86/include/uapi/asm/kvm_para.h index 21d5f0240595..2a8e0b6b9805 100644 --- a/arch/x86/include/uapi/asm/kvm_para.h +++ b/arch/x86/include/uapi/asm/kvm_para.h @@ -30,6 +30,7 @@ #define KVM_FEATURE_ASYNC_PF_VMEXIT 10 #define KVM_FEATURE_PV_SEND_IPI 11 #define KVM_FEATURE_POLL_CONTROL 12 +#define KVM_FEATURE_PV_SCHED_YIELD 13 #define KVM_HINTS_REALTIME 0 |