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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-12-17 17:16:08 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-12-17 17:33:47 +0100 |
| commit | 15eafc2e602ff8c37c6e132eb8c63fec8fc17175 (patch) | |
| tree | e37c79eac125c083389e8bde03b8d3e048c22b0a /include/hw/i386/pc.h | |
| parent | 32c18a2dbaf79c241eddabd19a3b410bab5bf0cc (diff) | |
| download | focaccia-qemu-15eafc2e602ff8c37c6e132eb8c63fec8fc17175.tar.gz focaccia-qemu-15eafc2e602ff8c37c6e132eb8c63fec8fc17175.zip | |
kvm: x86: add support for KVM_CAP_SPLIT_IRQCHIP
This patch adds support for split IRQ chip mode. When
KVM_CAP_SPLIT_IRQCHIP is enabled:
1.) The PIC, PIT, and IOAPIC are implemented in userspace while
the LAPIC is implemented by KVM.
2.) The software IOAPIC delivers interrupts to the KVM LAPIC via
kvm_set_irq. Interrupt delivery is configured via the MSI routing
table, for which routes are reserved in target-i386/kvm.c then
configured in hw/intc/ioapic.c
3.) KVM delivers IOAPIC EOIs via a new exit KVM_EXIT_IOAPIC_EOI,
which is handled in target-i386/kvm.c and relayed to the software
IOAPIC via ioapic_eoi_broadcast.
Signed-off-by: Matt Gingell <gingell@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/hw/i386/pc.h')
| -rw-r--r-- | include/hw/i386/pc.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 854c330b66..4bf4faf050 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -20,6 +20,19 @@ #define HPET_INTCAP "hpet-intcap" +#ifdef CONFIG_KVM +#define kvm_pit_in_kernel() \ + (kvm_irqchip_in_kernel() && !kvm_irqchip_is_split()) +#define kvm_pic_in_kernel() \ + (kvm_irqchip_in_kernel() && !kvm_irqchip_is_split()) +#define kvm_ioapic_in_kernel() \ + (kvm_irqchip_in_kernel() && !kvm_irqchip_is_split()) +#else +#define kvm_pit_in_kernel() 0 +#define kvm_pic_in_kernel() 0 +#define kvm_ioapic_in_kernel() 0 +#endif + /** * PCMachineState: * @acpi_dev: link to ACPI PM device that performs ACPI hotplug handling |