You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
2.7 KiB
80 lines
2.7 KiB
From 732115c80eb0dd672925a0737e09643d8a889abd Mon Sep 17 00:00:00 2001
|
|
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
|
|
Date: Tue, 21 Nov 2023 16:44:15 +0800
|
|
Subject: [PATCH 036/101] vfio/ccw: Allow the selection of a given iommu
|
|
backend
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Eric Auger <eric.auger@redhat.com>
|
|
RH-MergeRequest: 211: IOMMUFD backend backport
|
|
RH-Jira: RHEL-19302 RHEL-21057
|
|
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
|
|
RH-Acked-by: Sebastian Ott <sebott@redhat.com>
|
|
RH-Commit: [35/67] 1701de023a9f3b3f0420689bf851e11aee88800d (eauger1/centos-qemu-kvm)
|
|
|
|
Now we support two types of iommu backends, let's add the capability
|
|
to select one of them. This depends on whether an iommufd object has
|
|
been linked with the vfio-ccw device:
|
|
|
|
If the user wants to use the legacy backend, it shall not
|
|
link the vfio-ccw device with any iommufd object:
|
|
|
|
-device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX
|
|
|
|
This is called the legacy mode/backend.
|
|
|
|
If the user wants to use the iommufd backend (/dev/iommu) it
|
|
shall pass an iommufd object id in the vfio-ccw device options:
|
|
|
|
-object iommufd,id=iommufd0
|
|
-device vfio-ccw,sysfsdev=/sys/bus/mdev/devices/XXX,iommufd=iommufd0
|
|
|
|
Suggested-by: Alex Williamson <alex.williamson@redhat.com>
|
|
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
|
|
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
|
|
Reviewed-by: Cédric Le Goater <clg@redhat.com>
|
|
Reviewed-by: Eric Farman <farman@linux.ibm.com>
|
|
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
|
|
Signed-off-by: Cédric Le Goater <clg@redhat.com>
|
|
(cherry picked from commit e70f971a6c1230138843d7ab82267e4a5aaf6bda)
|
|
Signed-off-by: Eric Auger <eric.auger@redhat.com>
|
|
---
|
|
hw/vfio/ccw.c | 6 ++++++
|
|
1 file changed, 6 insertions(+)
|
|
|
|
diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c
|
|
index d857bb8d0f..d2d58bb677 100644
|
|
--- a/hw/vfio/ccw.c
|
|
+++ b/hw/vfio/ccw.c
|
|
@@ -15,12 +15,14 @@
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
+#include CONFIG_DEVICES /* CONFIG_IOMMUFD */
|
|
#include <linux/vfio.h>
|
|
#include <linux/vfio_ccw.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "qapi/error.h"
|
|
#include "hw/vfio/vfio-common.h"
|
|
+#include "sysemu/iommufd.h"
|
|
#include "hw/s390x/s390-ccw.h"
|
|
#include "hw/s390x/vfio-ccw.h"
|
|
#include "hw/qdev-properties.h"
|
|
@@ -677,6 +679,10 @@ static void vfio_ccw_unrealize(DeviceState *dev)
|
|
static Property vfio_ccw_properties[] = {
|
|
DEFINE_PROP_STRING("sysfsdev", VFIOCCWDevice, vdev.sysfsdev),
|
|
DEFINE_PROP_BOOL("force-orb-pfch", VFIOCCWDevice, force_orb_pfch, false),
|
|
+#ifdef CONFIG_IOMMUFD
|
|
+ DEFINE_PROP_LINK("iommufd", VFIOCCWDevice, vdev.iommufd,
|
|
+ TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *),
|
|
+#endif
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
--
|
|
2.39.3
|
|
|