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[PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check wi
From: |
Zhenzhong Duan |
Subject: |
[PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap |
Date: |
Mon, 8 Apr 2024 16:44:02 +0800 |
From: Yi Liu <yi.l.liu@intel.com>
If check fails, the host side device(either vfio or vdpa device) should not
be passed to guest.
Implementation details for different backends will be in following patches.
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
hw/i386/intel_iommu.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 4f84e2e801..a49b587c73 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -35,6 +35,7 @@
#include "sysemu/kvm.h"
#include "sysemu/dma.h"
#include "sysemu/sysemu.h"
+#include "sysemu/iommufd.h"
#include "hw/i386/apic_internal.h"
#include "kvm/kvm_i386.h"
#include "migration/vmstate.h"
@@ -3819,6 +3820,32 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s,
PCIBus *bus,
return vtd_dev_as;
}
+static int vtd_check_legacy_hdev(IntelIOMMUState *s,
+ HostIOMMUDevice *hiod,
+ Error **errp)
+{
+ return 0;
+}
+
+static int vtd_check_iommufd_hdev(IntelIOMMUState *s,
+ HostIOMMUDevice *hiod,
+ Error **errp)
+{
+ return 0;
+}
+
+static int vtd_check_hdev(IntelIOMMUState *s, VTDHostIOMMUDevice *vtd_hdev,
+ Error **errp)
+{
+ HostIOMMUDevice *hiod = vtd_hdev->dev;
+
+ if (object_dynamic_cast(OBJECT(hiod), TYPE_HIOD_IOMMUFD)) {
+ return vtd_check_iommufd_hdev(s, hiod, errp);
+ }
+
+ return vtd_check_legacy_hdev(s, hiod, errp);
+}
+
static int vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn,
HostIOMMUDevice *hiod, Error **errp)
{
@@ -3829,6 +3856,7 @@ static int vtd_dev_set_iommu_device(PCIBus *bus, void
*opaque, int devfn,
.devfn = devfn,
};
struct vtd_as_key *new_key;
+ int ret;
assert(hiod);
@@ -3848,6 +3876,13 @@ static int vtd_dev_set_iommu_device(PCIBus *bus, void
*opaque, int devfn,
vtd_hdev->iommu_state = s;
vtd_hdev->dev = hiod;
+ ret = vtd_check_hdev(s, vtd_hdev, errp);
+ if (ret) {
+ g_free(vtd_hdev);
+ vtd_iommu_unlock(s);
+ return ret;
+ }
+
new_key = g_malloc(sizeof(*new_key));
new_key->bus = bus;
new_key->devfn = devfn;
--
2.34.1
- [PATCH v2 0/5] Check host IOMMU compatilibity with vIOMMU, Zhenzhong Duan, 2024/04/08
- [PATCH v2 1/5] intel_iommu: Extract out vtd_cap_init() to initialize cap/ecap, Zhenzhong Duan, 2024/04/08
- [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap,
Zhenzhong Duan <=
- Re: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Cédric Le Goater, 2024/04/15
- RE: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Duan, Zhenzhong, 2024/04/16
- Re: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Cédric Le Goater, 2024/04/16
- RE: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Duan, Zhenzhong, 2024/04/17
- Re: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Cédric Le Goater, 2024/04/17
- RE: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Duan, Zhenzhong, 2024/04/17
- Re: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Cédric Le Goater, 2024/04/18
- RE: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Duan, Zhenzhong, 2024/04/18
- Re: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Cédric Le Goater, 2024/04/19
- RE: [PATCH v2 3/5] intel_iommu: Add a framework to do compatibility check with host IOMMU cap/ecap, Duan, Zhenzhong, 2024/04/19