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KVM: PPC: Book3S HV P9: Inject pending xive interrupts at guest entry

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If there is a pending xive interrupt, inject it at guest entry (if
MSR[EE] is enabled) rather than take another interrupt when the guest
is entered. If xive is enabled then LPCR[LPES] is set so this behaviour
should be expected.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220303053315.1056880-3-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin 2022-03-03 15:33:11 +10:00 • committed by Michael Ellerman
parent f104df7d51
commit 026728dc5d
1 changed files with 7 additions and 2 deletions
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9
arch/powerpc/kvm/book3s_hv.c
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@ -4519,9 +4519,14 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
if (!nested) {
kvmppc_core_prepare_to_enter(vcpu);
if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
&vcpu->arch.pending_exceptions))
if (vcpu->arch.shregs.msr & MSR_EE) {
if (xive_interrupt_pending(vcpu))
kvmppc_inject_interrupt_hv(vcpu,
BOOK3S_INTERRUPT_EXTERNAL, 0);
} else if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
&vcpu->arch.pending_exceptions)) {
lpcr |= LPCR_MER;
}
} else if (vcpu->arch.pending_exceptions ||
vcpu->arch.doorbell_request ||
xive_interrupt_pending(vcpu)) {