From 6054565c248742d297ff090e2de1543fcc6b7604 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Thu, 18 Aug 2016 03:00:49 +0200 Subject: [PATCH 31/37] intel_iommu: disallow kernel-irqchip=on with IR RH-Author: Peter Xu Message-id: <1471489253-2811-31-git-send-email-peterx@redhat.com> Patchwork-id: 72015 O-Subject: [RHEL-7.3 qemu-kvm-rhev v2 30/34] intel_iommu: disallow kernel-irqchip=on with IR Bugzilla: 1358653 RH-Acked-by: Marcel Apfelbaum RH-Acked-by: Paolo Bonzini RH-Acked-by: Radim Krcmar When user specify "intremap=on" with "-M kernel-irqchip=on", throw error and then quit. Signed-off-by: Peter Xu Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin (cherry picked from commit 4684a2041005b598ecc92fbaf36463d2fd12b5de) Signed-off-by: Peter Xu Signed-off-by: Miroslav Rezanina --- 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 df2678b..0e139d1 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 @@ -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) -- 1.8.3.1