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authorPaul Mackerras <paulus@samba.org>2014-06-30 20:51:14 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2014-08-05 14:26:33 +0200
commit25a2150bee00b4d996487552948b9b3ba21d0257 (patch)
tree871ddff4f28387cd9c85ade7860c883da3660fbf /arch/powerpc/kvm/Kconfig
parent297e21053a52f060944e9f0de4c64fad9bcd72fc (diff)
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/Kconfig')
-rw-r--r--arch/powerpc/kvm/Kconfig2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index d4741dba91af..602eb51d20bc 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -170,6 +170,8 @@ config KVM_MPIC
config KVM_XICS
bool "KVM in-kernel XICS emulation"
depends on KVM_BOOK3S_64 && !KVM_MPIC
+ select HAVE_KVM_IRQCHIP
+ select HAVE_KVM_IRQFD
---help---
Include support for the XICS (eXternal Interrupt Controller
Specification) interrupt controller architecture used on