From 6333e93c772f78baf26a5c97c1a67ffa7cd76068 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= Date: Mon, 10 Oct 2016 17:28:45 +0200 Subject: [PATCH] intel_iommu: redo configuraton check in realize MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * there no point in configuring the device if realization is going to fail, so move the check to the beginning, * create a separate function for the check, * use error_setg() instead error_report(). Reviewed-by: Igor Mammedov Reviewed-by: Peter Xu Signed-off-by: Radim Krčmář Signed-off-by: Eduardo Habkost --- hw/i386/intel_iommu.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index d22a51c488..29cd2ae51d 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -21,6 +21,7 @@ #include "qemu/osdep.h" #include "qemu/error-report.h" +#include "qapi/error.h" #include "hw/sysbus.h" #include "exec/address-spaces.h" #include "intel_iommu_internal.h" @@ -2460,6 +2461,18 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn) return &vtd_as->as; } +static bool vtd_check_config(X86IOMMUState *x86_iommu, Error **errp) +{ + /* Currently Intel IOMMU IR only support "kernel-irqchip={off|split}" */ + if (x86_iommu->intr_supported && kvm_irqchip_in_kernel() && + !kvm_irqchip_is_split()) { + error_setg(errp, "Intel Interrupt Remapping cannot work with " + "kernel-irqchip=on, please use 'split|off'."); + return false; + } + return true; +} + static void vtd_realize(DeviceState *dev, Error **errp) { PCMachineState *pcms = PC_MACHINE(qdev_get_machine()); @@ -2469,6 +2482,11 @@ static void vtd_realize(DeviceState *dev, Error **errp) VTD_DPRINTF(GENERAL, ""); x86_iommu->type = TYPE_INTEL; + + if (!vtd_check_config(x86_iommu, errp)) { + return; + } + memset(s->vtd_as_by_bus_num, 0, sizeof(s->vtd_as_by_bus_num)); memory_region_init_io(&s->csrmem, OBJECT(s), &vtd_mem_ops, s, "intel_iommu", DMAR_REG_SIZE); @@ -2483,14 +2501,6 @@ 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)