71 lines
2.3 KiB
Diff
71 lines
2.3 KiB
Diff
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From 5e743a2f7791f4fb3eea40806ca69f6cce1258c2 Mon Sep 17 00:00:00 2001
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From: Zhenzhong Duan <zhenzhong.duan@intel.com>
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Date: Sat, 11 Jan 2025 10:52:52 +0800
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Subject: [PATCH] vfio/ccw: 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-ccw device:
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If the user wants to use the legacy backend, it shall not
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link the vfio-ccw device with any iommufd object:
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-device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX
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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-ccw device options:
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-object iommufd,id=iommufd0
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-device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX,iommufd=iommufd0
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Suggested-by: Alex Williamson <alex.williamson@redhat.com>
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Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
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Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
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Reviewed-by: Cédric Le Goater <clg@redhat.com>
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Reviewed-by: Eric Farman <farman@linux.ibm.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/ccw.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
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index d857bb8d0f..d2d58bb677 100644
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--- a/hw/vfio/ccw.c
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+++ b/hw/vfio/ccw.c
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@@ -15,12 +15,14 @@
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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 <linux/vfio_ccw.h>
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#include <sys/ioctl.h>
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#include "qapi/error.h"
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#include "hw/vfio/vfio-common.h"
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+#include "sysemu/iommufd.h"
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#include "hw/s390x/s390-ccw.h"
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#include "hw/s390x/vfio-ccw.h"
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#include "hw/qdev-properties.h"
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@@ -677,6 +679,10 @@ static void vfio_ccw_unrealize(DeviceState *dev)
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static Property vfio_ccw_properties[] = {
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DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
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DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
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+#ifdef CONFIG_IOMMUFD
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+ DEFINE_PROP_LINK("iommufd", VFIOCCWDevice, vdev.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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