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| author | Paul Mackerras <paulus@samba.org> | 2014-06-30 20:51:14 +1000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-08-05 14:26:33 +0200 |
| commit | 25a2150bee00b4d996487552948b9b3ba21d0257 (patch) | |
| tree | 871ddff4f28387cd9c85ade7860c883da3660fbf /arch/powerpc/kvm/Kconfig | |
| parent | 297e21053a52f060944e9f0de4c64fad9bcd72fc (diff) | |
| download | linux-25a2150bee00b4d996487552948b9b3ba21d0257.tar.gz linux-25a2150bee00b4d996487552948b9b3ba21d0257.tar.bz2 linux-25a2150bee00b4d996487552948b9b3ba21d0257.zip | |
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/Kconfig | 2 |
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 |