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[Qemu-devel] [PULL 35/55] intel_iommu: disallow kernel-irqchip=on with I
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] [PULL 35/55] intel_iommu: disallow kernel-irqchip=on with IR |
Date: |
Tue, 19 Jul 2016 01:46:23 +0300 |
From: Peter Xu <address@hidden>
When user specify "intremap=on" with "-M kernel-irqchip=on", throw error
and then quit.
Signed-off-by: Peter Xu <address@hidden>
Signed-off-by: Peter Xu <address@hidden>
---
hw/i386/intel_iommu.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 00e6682..06cc94f 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -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
@@ -2450,6 +2452,7 @@ 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));
@@ -2466,6 +2469,14 @@ 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)
--
MST
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