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| author | Wanpeng Li <wanpengli@tencent.com> | 2020-04-02 16:20:26 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-07 08:34:16 -0400 |
| commit | 4064a4c6a1f90d169f36259647be3a8ddb91fa96 (patch) | |
| tree | f12ef5487f82c5aafb71cffce181590eeb2dc558 /arch/x86/kvm/x86.c | |
| parent | 1b0c58a34b4c4e0b010621b21fc38ac2929aa3cb (diff) | |
| download | lwn-4064a4c6a1f90d169f36259647be3a8ddb91fa96.tar.gz lwn-4064a4c6a1f90d169f36259647be3a8ddb91fa96.zip | |
KVM: X86: Filter out the broadcast dest for IPI fastpath
Except destination shorthand, a destination value 0xffffffff is used to
broadcast interrupts, let's also filter out this for single target IPI
fastpath.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1585815626-28370-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b8124b562dea..027dfd278a97 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1586,7 +1586,8 @@ static int handle_fastpath_set_x2apic_icr_irqoff(struct kvm_vcpu *vcpu, u64 data if (((data & APIC_SHORT_MASK) == APIC_DEST_NOSHORT) && ((data & APIC_DEST_MASK) == APIC_DEST_PHYSICAL) && - ((data & APIC_MODE_MASK) == APIC_DM_FIXED)) { + ((data & APIC_MODE_MASK) == APIC_DM_FIXED) && + ((u32)(data >> 32) != X2APIC_BROADCAST)) { data &= ~(1 << 12); kvm_apic_send_ipi(vcpu->arch.apic, (u32)data, (u32)(data >> 32)); |