From e3d9c92507df61608896a579b5b0d7c218d5353e Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 14 Jul 2016 13:56:27 +0800 Subject: [PATCH] ioapic: register IOMMU IEC notifier for ioapic Let IOAPIC the first consumer of x86 IOMMU IEC invalidation notifiers. This is only used for split irqchip case, when vIOMMU receives IR invalidation requests, IOAPIC will be notified to update kernel irq routes. For simplicity, we just update all IOAPIC routes, even if the invalidated entries are not IOAPIC ones. Since now we are creating IOMMUs using "-device" parameter, IOMMU device will be created after IOAPIC. We need to do the registration after machine done by leveraging machine_done notifier. Signed-off-by: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/intc/ioapic.c | 31 +++++++++++++++++++++++++++++++ include/hw/i386/ioapic_internal.h | 2 ++ 2 files changed, 33 insertions(+) diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c index cfc7b7b9586..2d3282a864c 100644 --- a/hw/intc/ioapic.c +++ b/hw/intc/ioapic.c @@ -31,6 +31,7 @@ #include "sysemu/kvm.h" #include "target-i386/cpu.h" #include "hw/i386/apic-msidef.h" +#include "hw/i386/x86-iommu.h" //#define DEBUG_IOAPIC @@ -198,6 +199,16 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s) #endif } +#ifdef CONFIG_KVM +static void ioapic_iec_notifier(void *private, bool global, + uint32_t index, uint32_t mask) +{ + IOAPICCommonState *s = (IOAPICCommonState *)private; + /* For simplicity, we just update all the routes */ + ioapic_update_kvm_routes(s); +} +#endif + void ioapic_eoi_broadcast(int vector) { IOAPICCommonState *s; @@ -354,6 +365,24 @@ static const MemoryRegionOps ioapic_io_ops = { .endianness = DEVICE_NATIVE_ENDIAN, }; +static void ioapic_machine_done_notify(Notifier *notifier, void *data) +{ +#ifdef CONFIG_KVM + IOAPICCommonState *s = container_of(notifier, IOAPICCommonState, + machine_done); + + if (kvm_irqchip_is_split()) { + X86IOMMUState *iommu = x86_iommu_get_default(); + if (iommu) { + /* Register this IOAPIC with IOMMU IEC notifier, so that + * when there are IR invalidates, we can be notified to + * update kernel IR cache. */ + x86_iommu_iec_register_notifier(iommu, ioapic_iec_notifier, s); + } + } +#endif +} + static void ioapic_realize(DeviceState *dev, Error **errp) { IOAPICCommonState *s = IOAPIC_COMMON(dev); @@ -364,6 +393,8 @@ static void ioapic_realize(DeviceState *dev, Error **errp) qdev_init_gpio_in(dev, ioapic_set_irq, IOAPIC_NUM_PINS); ioapics[ioapic_no] = s; + s->machine_done.notify = ioapic_machine_done_notify; + qemu_add_machine_init_done_notifier(&s->machine_done); } static void ioapic_class_init(ObjectClass *klass, void *data) diff --git a/include/hw/i386/ioapic_internal.h b/include/hw/i386/ioapic_internal.h index 5c901ae78f3..d89ea1b63bf 100644 --- a/include/hw/i386/ioapic_internal.h +++ b/include/hw/i386/ioapic_internal.h @@ -25,6 +25,7 @@ #include "hw/hw.h" #include "exec/memory.h" #include "hw/sysbus.h" +#include "qemu/notify.h" #define MAX_IOAPICS 1 @@ -107,6 +108,7 @@ struct IOAPICCommonState { uint8_t ioregsel; uint32_t irr; uint64_t ioredtbl[IOAPIC_NUM_PINS]; + Notifier machine_done; }; void ioapic_reset_common(DeviceState *dev); -- 2.39.5