forked from rpms/qemu-kvm
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.
76 lines
2.5 KiB
76 lines
2.5 KiB
9 months ago
|
From 57bdfc821d6f4b4f9c6b1ff05bf0114e5cabc77e Mon Sep 17 00:00:00 2001
|
||
|
|
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
|
||
|
|
Date: Tue, 21 Nov 2023 16:44:13 +0800
|
||
|
|
Subject: [PATCH 034/101] vfio/ap: 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: [33/67] a12bb86e5b627ccf246fb9ce60820595589ff8e5 (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-ap device:
|
||
|
|
|
||
|
|
if the user wants to use the legacy backend, it shall not
|
||
|
|
link the vfio-ap device with any iommufd object:
|
||
|
|
|
||
|
|
-device vfio-ap,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-ap device options:
|
||
|
|
|
||
|
|
-object iommufd,id=iommufd0
|
||
|
|
-device vfio-ap,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>
|
||
|
|
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
|
||
|
|
Signed-off-by: Cédric Le Goater <clg@redhat.com>
|
||
|
|
(cherry picked from commit 336f308958d598f3db351bb7d94cc57b4b2d448d)
|
||
|
|
Signed-off-by: Eric Auger <eric.auger@redhat.com>
|
||
|
|
---
|
||
|
|
hw/vfio/ap.c | 6 ++++++
|
||
|
|
1 file changed, 6 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/hw/vfio/ap.c b/hw/vfio/ap.c
|
||
|
|
index bbf69ff55a..80629609ae 100644
|
||
|
|
--- a/hw/vfio/ap.c
|
||
|
|
+++ b/hw/vfio/ap.c
|
||
|
|
@@ -11,10 +11,12 @@
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "qemu/osdep.h"
|
||
|
|
+#include CONFIG_DEVICES /* CONFIG_IOMMUFD */
|
||
|
|
#include <linux/vfio.h>
|
||
|
|
#include <sys/ioctl.h>
|
||
|
|
#include "qapi/error.h"
|
||
|
|
#include "hw/vfio/vfio-common.h"
|
||
|
|
+#include "sysemu/iommufd.h"
|
||
|
|
#include "hw/s390x/ap-device.h"
|
||
|
|
#include "qemu/error-report.h"
|
||
|
|
#include "qemu/event_notifier.h"
|
||
|
|
@@ -204,6 +206,10 @@ static void vfio_ap_unrealize(DeviceState *dev)
|
||
|
|
|
||
|
|
static Property vfio_ap_properties[] = {
|
||
|
|
DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev),
|
||
|
|
+#ifdef CONFIG_IOMMUFD
|
||
|
|
+ DEFINE_PROP_LINK("iommufd", VFIOAPDevice, vdev.iommufd,
|
||
|
|
+ TYPE_IOMMUFD_BACKEND, IOMMUFDBackend *),
|
||
|
|
+#endif
|
||
|
|
DEFINE_PROP_END_OF_LIST(),
|
||
|
|
};
|
||
|
|
|
||
|
|
--
|
||
|
|
2.39.3
|
||
|
|
|