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authorPaul Mackerras <paulus@samba.org>2014-06-30 14:51:14 +0400
committerPaolo Bonzini <pbonzini@redhat.com>2014-08-05 16:26:33 +0400
commit25a2150bee00b4d996487552948b9b3ba21d0257 (patch)
tree871ddff4f28387cd9c85ade7860c883da3660fbf /arch/powerpc/kvm/book3s_hv_rm_xics.c
parent297e21053a52f060944e9f0de4c64fad9bcd72fc (diff)
downloadlinux-25a2150bee00b4d996487552948b9b3ba21d0257.tar.xz
KVM: PPC: Enable IRQFD support for the XICS interrupt controller
This makes it possible to use IRQFDs on platforms that use the XICS interrupt controller. To do this we implement kvm_irq_map_gsi() and kvm_irq_map_chip_pin() in book3s_xics.c, so as to provide a 1-1 mapping between global interrupt numbers and XICS interrupt source numbers. For now, all interrupts are mapped as "IRQCHIP" interrupts, and no MSI support is provided. This means that kvm_set_irq can now get called with level == 0 or 1 as well as the powerpc-specific values KVM_INTERRUPT_SET, KVM_INTERRUPT_UNSET and KVM_INTERRUPT_SET_LEVEL. We change ics_deliver_irq() to accept all those values, and remove its report_status argument, as it is always false, given that we don't support KVM_IRQ_LINE_STATUS. This also adds support for interrupt ack notifiers to the XICS code so that the IRQFD resampler functionality can be supported. Signed-off-by: Paul Mackerras <paulus@samba.org> Tested-by: Eric Auger <eric.auger@linaro.org> Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rm_xics.c')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rm_xics.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_xics.c b/arch/powerpc/kvm/book3s_hv_rm_xics.c
index b4b0082f761c..3ee38e6e884f 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_xics.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_xics.c
@@ -401,6 +401,11 @@ int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr)
icp->rm_action |= XICS_RM_REJECT;
icp->rm_reject = irq;
}
+
+ if (!hlist_empty(&vcpu->kvm->irq_ack_notifier_list)) {
+ icp->rm_action |= XICS_RM_NOTIFY_EOI;
+ icp->rm_eoied_irq = irq;
+ }
bail:
return check_too_hard(xics, icp);
}