73 lines
2.2 KiB
Diff
73 lines
2.2 KiB
Diff
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From 6576af91f2621c24de4a8bbfa2c6681a16a5d043 Mon Sep 17 00:00:00 2001
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From: Eric Auger <eric.auger@redhat.com>
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Date: Sat, 11 Jan 2025 10:52:46 +0800
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Subject: [PATCH] vfio/pci: Allow the selection of a given iommu backend
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Now we support two types of iommu backends, let's add the capability
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to select one of them. This depends on whether an iommufd object has
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been linked with the vfio-pci device:
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If the user wants to use the legacy backend, it shall not
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link the vfio-pci device with any iommufd object:
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-device vfio-pci,host=0000:02:00.0
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This is called the legacy mode/backend.
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If the user wants to use the iommufd backend (/dev/iommu) it
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shall pass an iommufd object id in the vfio-pci device options:
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-object iommufd,id=iommufd0
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-device vfio-pci,host=0000:02:00.0,iommufd=iommufd0
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Suggested-by: Alex Williamson <alex.williamson@redhat.com>
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Signed-off-by: Eric Auger <eric.auger@redhat.com>
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Signed-off-by: Yi Liu <yi.l.liu@intel.com>
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Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
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Reviewed-by: Cédric Le Goater <clg@redhat.com>
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Tested-by: Eric Auger <eric.auger@redhat.com>
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Tested-by: Nicolin Chen <nicolinc@nvidia.com>
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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Signed-off-by: Zhou Wang <wangzhou1@hisilicon.com>
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---
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hw/vfio/pci.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
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index d00c3472c7..c5984b0598 100644
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--- a/hw/vfio/pci.c
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+++ b/hw/vfio/pci.c
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@@ -19,6 +19,7 @@
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*/
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#include "qemu/osdep.h"
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+#include CONFIG_DEVICES /* CONFIG_IOMMUFD */
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#include <linux/vfio.h>
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#include <sys/ioctl.h>
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@@ -42,6 +43,7 @@
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#include "qapi/error.h"
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#include "migration/blocker.h"
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#include "migration/qemu-file.h"
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+#include "sysemu/iommufd.h"
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#define TYPE_VFIO_PCI_NOHOTPLUG "vfio-pci-nohotplug"
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@@ -3386,6 +3388,10 @@ static Property vfio_pci_dev_properties[] = {
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* DEFINE_PROP_STRING("vfiofd", VFIOPCIDevice, vfiofd_name),
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* DEFINE_PROP_STRING("vfiogroupfd, VFIOPCIDevice, vfiogroupfd_name),
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*/
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+#ifdef CONFIG_IOMMUFD
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+ DEFINE_PROP_LINK("iommufd", VFIOPCIDevice, vbasedev.iommufd,
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+ TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *),
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+#endif
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DEFINE_PROP_END_OF_LIST(),
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};
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--
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2.41.0.windows.1
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