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[Qemu-devel] [PATCH v3 2/2] x86_iommu: check if machine has PCI bus
From: |
Mohammed Gamal |
Subject: |
[Qemu-devel] [PATCH v3 2/2] x86_iommu: check if machine has PCI bus |
Date: |
Mon, 18 Sep 2017 12:14:09 +0200 |
Starting qemu with
qemu-system-x86_64 -S -M isapc -device {amd|intel}-iommu
leads to a segfault. The code assume PCI bus is present and
tries to access the bus structure without checking.
Since Intel VT-d and AMDVI should only work with PCI, add a
check for PCI bus and return error if not present.
Signed-off-by: Mohammed Gamal <address@hidden>
---
hw/i386/x86-iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index d43b08a..00f70bb 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -87,7 +87,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
PCMachineState *pcms = PC_MACHINE(ms);
QLIST_INIT(&x86_iommu->iec_notifiers);
- if (!pcms) {
+ if (!pcms || !pcms->bus) {
error_setg(errp, "Machine-type '%s' not supported by IOMMU",
mc->name);
return;
--
1.8.3.1