* [Qemu-devel] [PATCH v5 1/2] x86_iommu: Move machine check to x86_iommu_realize()
2017-09-19 14:51 [Qemu-devel] [PATCH v5 0/2] x86_iommu: Fix segfault when starting on non-PCI machines Mohammed Gamal
@ 2017-09-19 14:51 ` Mohammed Gamal
2017-09-19 15:00 ` Eduardo Habkost
2017-09-19 14:51 ` [Qemu-devel] [PATCH v5 2/2] x86_iommu: check if machine has PCI bus Mohammed Gamal
1 sibling, 1 reply; 5+ messages in thread
From: Mohammed Gamal @ 2017-09-19 14:51 UTC (permalink / raw)
To: qemu-devel; +Cc: ehabkost, mst, thuth, peterx, pbonzini, Mohammed Gamal
Instead of having the same error checks in vtd_realize()
and amdvi_realize(), move that over to the generic
x86_iommu_realize().
Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
---
hw/i386/amd_iommu.c | 13 ++-----------
hw/i386/intel_iommu.c | 13 ++-----------
hw/i386/x86-iommu.c | 13 +++++++++++++
3 files changed, 17 insertions(+), 22 deletions(-)
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 334938a..f2e1868 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1141,18 +1141,9 @@ static void amdvi_realize(DeviceState *dev, Error **err)
AMDVIState *s = AMD_IOMMU_DEVICE(dev);
X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
MachineState *ms = MACHINE(qdev_get_machine());
- MachineClass *mc = MACHINE_GET_CLASS(ms);
- PCMachineState *pcms =
- PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
- PCIBus *bus;
-
- if (!pcms) {
- error_setg(err, "Machine-type '%s' not supported by amd-iommu",
- mc->name);
- return;
- }
+ PCMachineState *pcms = PC_MACHINE(ms);
+ PCIBus *bus = pcms->bus;
- bus = pcms->bus;
s->iotlb = g_hash_table_new_full(amdvi_uint64_hash,
amdvi_uint64_equal, g_free, g_free);
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 3a5bb0b..0138b3b 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -3027,20 +3027,11 @@ static bool vtd_decide_config(IntelIOMMUState *s, Error **errp)
static void vtd_realize(DeviceState *dev, Error **errp)
{
MachineState *ms = MACHINE(qdev_get_machine());
- MachineClass *mc = MACHINE_GET_CLASS(ms);
- PCMachineState *pcms =
- PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
- PCIBus *bus;
+ PCMachineState *pcms = PC_MACHINE(ms);
+ PCIBus *bus = pcms->bus;
IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
- if (!pcms) {
- error_setg(errp, "Machine-type '%s' not supported by intel-iommu",
- mc->name);
- return;
- }
-
- bus = pcms->bus;
x86_iommu->type = TYPE_INTEL;
if (!vtd_decide_config(s, errp)) {
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 293caf8..51de519 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -21,6 +21,8 @@
#include "hw/sysbus.h"
#include "hw/boards.h"
#include "hw/i386/x86-iommu.h"
+#include "hw/i386/pc.h"
+#include "qapi/error.h"
#include "qemu/error-report.h"
#include "trace.h"
@@ -80,7 +82,18 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
{
X86IOMMUState *x86_iommu = X86_IOMMU_DEVICE(dev);
X86IOMMUClass *x86_class = X86_IOMMU_GET_CLASS(dev);
+ MachineState *ms = MACHINE(qdev_get_machine());
+ MachineClass *mc = MACHINE_GET_CLASS(ms);
+ PCMachineState *pcms =
+ PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
QLIST_INIT(&x86_iommu->iec_notifiers);
+
+ if (!pcms) {
+ error_setg(errp, "Machine-type '%s' not supported by IOMMU",
+ mc->name);
+ return;
+ }
+
if (x86_class->realize) {
x86_class->realize(dev, errp);
}
--
1.8.3.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [Qemu-devel] [PATCH v5 2/2] x86_iommu: check if machine has PCI bus
2017-09-19 14:51 [Qemu-devel] [PATCH v5 0/2] x86_iommu: Fix segfault when starting on non-PCI machines Mohammed Gamal
2017-09-19 14:51 ` [Qemu-devel] [PATCH v5 1/2] x86_iommu: Move machine check to x86_iommu_realize() Mohammed Gamal
@ 2017-09-19 14:51 ` Mohammed Gamal
2017-09-19 15:01 ` Eduardo Habkost
1 sibling, 1 reply; 5+ messages in thread
From: Mohammed Gamal @ 2017-09-19 14:51 UTC (permalink / raw)
To: qemu-devel; +Cc: ehabkost, mst, thuth, peterx, pbonzini, Mohammed Gamal
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 <mgamal@redhat.com>
---
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 51de519..8a01a2d 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -88,7 +88,7 @@ static void x86_iommu_realize(DeviceState *dev, Error **errp)
PC_MACHINE(object_dynamic_cast(OBJECT(ms), TYPE_PC_MACHINE));
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
^ permalink raw reply related [flat|nested] 5+ messages in thread