From 15eafc2e602ff8c37c6e132eb8c63fec8fc17175 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 17 Dec 2015 17:16:08 +0100 Subject: 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 Signed-off-by: Paolo Bonzini --- target-arm/kvm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'target-arm/kvm.c') diff --git a/target-arm/kvm.c b/target-arm/kvm.c index 84974bb..eca3a00 100644 --- a/target-arm/kvm.c +++ b/target-arm/kvm.c @@ -25,6 +25,7 @@ #include "internals.h" #include "hw/arm/arm.h" #include "exec/memattrs.h" +#include "hw/boards.h" const KVMCapabilityInfo kvm_arch_required_capabilities[] = { KVM_CAP_LAST_INFO @@ -578,8 +579,13 @@ void kvm_arch_init_irq_routing(KVMState *s) { } -int kvm_arch_irqchip_create(KVMState *s) +int kvm_arch_irqchip_create(MachineState *ms, KVMState *s) { + if (machine_kernel_irqchip_split(ms)) { + perror("-machine kernel_irqchip=split is not supported on ARM."); + exit(1); + } + /* If we can create the VGIC using the newer device control API, we * let the device do this when it initializes itself, otherwise we * fall back to the old API */ -- cgit v1.1