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| author | Jagannathan Raman <jag.raman@oracle.com> | 2021-01-29 11:46:19 -0500 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2021-02-10 09:23:28 +0000 |
| commit | bd36adb8df5d62a2b4d4ded6357fb50b69a508fa (patch) | |
| tree | 6660a13fbf828e53aa204f57b3c6a46d60c87581 /hw/remote/machine.c | |
| parent | c746b74a7d881c7da4afdd7b29353a90c445a8ab (diff) | |
| download | qemu-bd36adb8df5d62a2b4d4ded6357fb50b69a508fa.zip qemu-bd36adb8df5d62a2b4d4ded6357fb50b69a508fa.tar.gz qemu-bd36adb8df5d62a2b4d4ded6357fb50b69a508fa.tar.bz2 | |
multi-process: create IOHUB object to handle irq
IOHUB object is added to manage PCI IRQs. It uses KVM_IRQFD
ioctl to create irqfd to injecting PCI interrupts to the guest.
IOHUB object forwards the irqfd to the remote process. Remote process
uses this fd to directly send interrupts to the guest, bypassing QEMU.
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 51d5c3d54e28a68b002e3875c59599c9f5a424a1.1611938319.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'hw/remote/machine.c')
| -rw-r--r-- | hw/remote/machine.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/remote/machine.c b/hw/remote/machine.c index 9519a6c..c0ab4f5 100644 --- a/hw/remote/machine.c +++ b/hw/remote/machine.c @@ -20,12 +20,15 @@ #include "exec/address-spaces.h" #include "exec/memory.h" #include "qapi/error.h" +#include "hw/pci/pci_host.h" +#include "hw/remote/iohub.h" static void remote_machine_init(MachineState *machine) { MemoryRegion *system_memory, *system_io, *pci_memory; RemoteMachineState *s = REMOTE_MACHINE(machine); RemotePCIHost *rem_host; + PCIHostState *pci_host; system_memory = get_system_memory(); system_io = get_system_io(); @@ -45,6 +48,13 @@ static void remote_machine_init(MachineState *machine) memory_region_add_subregion_overlap(system_memory, 0x0, pci_memory, -1); qdev_realize(DEVICE(rem_host), sysbus_get_default(), &error_fatal); + + pci_host = PCI_HOST_BRIDGE(rem_host); + + remote_iohub_init(&s->iohub); + + pci_bus_irqs(pci_host->bus, remote_iohub_set_irq, remote_iohub_map_irq, + &s->iohub, REMOTE_IOHUB_NB_PIRQS); } static void remote_machine_class_init(ObjectClass *oc, void *data) |