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| author |   Wanpeng Li <wanpeng.li@hotmail.com> | 2017-08-01 16:05:25 -0700 |
|---|---|---|
| committer |   Radim Krčmář <rkrcmar@redhat.com> | 2017-08-02 22:41:01 +0200 |
| commit | f4ef19108608c81769db69976999d056c070a6f0 (patch) | |
| tree | c6c8bbbe1b23473fc29deb1cb4160b1d4b163b2d /virt | |
| parent | KVM: async_pf: make rcu irq exit if not triggered from idle task (diff) | |
| download | linux-dev-f4ef19108608c81769db69976999d056c070a6f0.tar.xz linux-dev-f4ef19108608c81769db69976999d056c070a6f0.zip | |
KVM: X86: Fix loss of pending INIT due to race
When SMP VM start, AP may lost INIT because of receiving INIT between
kvm_vcpu_ioctl_x86_get/set_vcpu_events.
vcpu 0 vcpu 1
kvm_vcpu_ioctl_x86_get_vcpu_events
events->smi.latched_init = 0
send INIT to vcpu1
set vcpu1's pending_events
kvm_vcpu_ioctl_x86_set_vcpu_events
if (events->smi.latched_init == 0)
clear INIT in pending_events
This patch fixes it by just update SMM related flags if we are in SMM.
Thanks Peng Hao for the report and original commit message.
Reported-by: Peng Hao <peng.hao2@zte.com.cn>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'virt')
0 files changed, 0 insertions, 0 deletions