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| author |   Sean Christopherson <seanjc@google.com> | 2022-02-04 21:41:59 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-03-01 08:50:46 -0500 |
| commit | b51818afdc1d3c7cc269e295953685558d3af71c (patch) | |
| tree | af7dc8fcf64e7e84c37f05064196d4cec9c3f235 /arch/x86/kvm/lapic.c | |
| parent | KVM: SVM: Use common kvm_apic_write_nodecode() for AVIC write traps (diff) | |
| download | linux-dev-b51818afdc1d3c7cc269e295953685558d3af71c.tar.xz linux-dev-b51818afdc1d3c7cc269e295953685558d3af71c.zip | |
KVM: SVM: Don't rewrite guest ICR on AVIC IPI virtualization failure
Don't bother rewriting the ICR value into the vAPIC page on an AVIC IPI
virtualization failure, the access is a trap, i.e. the value has already
been written to the vAPIC page. The one caveat is if hardware left the
BUSY flag set (which appears to happen somewhat arbitrarily), in which
case go through the "nodecode" APIC-write path in order to clear the BUSY
flag.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220204214205.3306634-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 307f81635b6c..2b5db464c7aa 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1291,6 +1291,7 @@ void kvm_apic_send_ipi(struct kvm_lapic *apic, u32 icr_low, u32 icr_high) kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL); } +EXPORT_SYMBOL_GPL(kvm_apic_send_ipi); static u32 apic_get_tmcct(struct kvm_lapic *apic) { |