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intel_iommu: disallow kernel-irqchip=on with IR 

When user specify "intremap=on" with "-M kernel-irqchip=on", throw error
and then quit.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Peter Xu 2016-07-14 13:56:36 +08:00 committed by Michael S. Tsirkin
parent 54a6c11b20
commit 4684a20410
1 changed files with 11 additions and 0 deletions
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11
hw/i386/intel_iommu.c
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@ -20,6 +20,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "hw/sysbus.h"
#include "exec/address-spaces.h"
#include "intel_iommu_internal.h"
@ -29,6 +30,7 @@
#include "hw/boards.h"
#include "hw/i386/x86-iommu.h"
#include "hw/pci-host/q35.h"
#include "sysemu/kvm.h"
/*#define DEBUG_INTEL_IOMMU*/
#ifdef DEBUG_INTEL_IOMMU
@ -2448,6 +2450,7 @@ static void vtd_realize(DeviceState *dev, Error **errp)
PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
PCIBus *bus = pcms->bus;
IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
VTD_DPRINTF(GENERAL, "");
memset(s->vtd_as_by_bus_num, 0, sizeof(s->vtd_as_by_bus_num));
@ -2464,6 +2467,14 @@ static void vtd_realize(DeviceState *dev, Error **errp)
pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
/* Pseudo address space under root PCI bus. */
pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
/* Currently Intel IOMMU IR only support "kernel-irqchip={off|split}" */
if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() &&
!kvm_irqchip_is_split()) {
error_report("Intel Interrupt Remapping cannot work with "
"kernel-irqchip=on, please use 'split|off'.");
exit(1);
}
}
static void vtd_class_init(ObjectClass *klass, void *data)