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[Qemu-devel] [RFC PATCH 2/4] Xen: add a dummy vIOMMU to create/destroy v
From: |
Lan Tianyu |
Subject: |
[Qemu-devel] [RFC PATCH 2/4] Xen: add a dummy vIOMMU to create/destroy vIOMMU in Xen |
Date: |
Fri, 17 Mar 2017 19:29:15 +0800 |
From: Chao Gao <address@hidden>
Since adding a dynamic sysbus device is forbidden, so choose TYPE_DEVICE
as parent class.
Signed-off-by: Chao Gao <address@hidden>
Signed-off-by: Lan Tianyu <address@hidden>
---
hw/xen/Makefile.objs | 1 +
hw/xen/xen_viommu.c | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 117 insertions(+)
create mode 100644 hw/xen/xen_viommu.c
diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs
index d367094..e37d808 100644
--- a/hw/xen/Makefile.objs
+++ b/hw/xen/Makefile.objs
@@ -3,3 +3,4 @@ common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o
xen_devconfig.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o
xen_pt_graphics.o xen_pt_msi.o
+obj-$(CONFIG_XEN) += xen_viommu.o
diff --git a/hw/xen/xen_viommu.c b/hw/xen/xen_viommu.c
new file mode 100644
index 0000000..9bf9158
--- /dev/null
+++ b/hw/xen/xen_viommu.c
@@ -0,0 +1,116 @@
+/*
+ * Xen virtual IOMMU (virtual VT-D)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+
+#include "hw/qdev-core.h"
+#include "hw/sysbus.h"
+#include "hw/xen/xen.h"
+#include "hw/xen/xen_backend.h"
+
+#define TYPE_XEN_VIOMMU_DEVICE "xen_viommu"
+#define XEN_VIOMMU_DEVICE(obj) \
+ OBJECT_CHECK(XenVIOMMUState, (obj), TYPE_XEN_VIOMMU_DEVICE)
+
+typedef struct XenVIOMMUState XenVIOMMUState;
+
+struct XenVIOMMUState {
+ DeviceState dev;
+ uint32_t id;
+ uint64_t cap;
+ uint64_t base_addr;
+};
+
+static void xen_viommu_realize(DeviceState *dev, Error **errp)
+{
+ int rc;
+ uint64_t cap;
+ char *dom;
+ char viommu_path[1024];
+ XenVIOMMUState *s = XEN_VIOMMU_DEVICE(dev);
+
+ s->id = -1;
+
+ /* Read vIOMMU attributes from Xenstore. */
+ dom = xs_get_domain_path(xenstore, xen_domid);
+ snprintf(viommu_path, sizeof(viommu_path), "%s/viommu", dom);
+ rc = xenstore_read_uint64(viommu_path, "base_addr", &s->base_addr);
+ if (rc) {
+ error_report("Can't get base address of vIOMMU");
+ exit(1);
+ }
+
+ rc = xenstore_read_uint64(viommu_path, "cap", &s->cap);
+ if (rc) {
+ error_report("Can't get capabilities of vIOMMU");
+ exit(1);
+ }
+
+ rc = xc_viommu_query_cap(xen_xc, xen_domid, &cap);
+ if (rc) {
+ exit(1);
+ }
+
+
+ if ((cap & s->cap) != cap) {
+ error_report("xen: Unsupported capability %lx", s->cap);
+ exit(1);
+ }
+
+ rc = xc_viommu_create(xen_xc, xen_domid, s->base_addr, s->cap, &s->id);
+ if (rc) {
+ s->id = -1;
+ error_report("xen: failed(%d) to create viommu ", rc);
+ exit(1);
+ }
+}
+
+static void xen_viommu_instance_finalize(Object *o)
+{
+ int rc;
+ XenVIOMMUState *s = XEN_VIOMMU_DEVICE(o);
+
+ if (s->id != -1) {
+ rc = xc_viommu_destroy(xen_xc, xen_domid, s->id);
+ if (rc) {
+ error_report("xen: failed(%d) to destroy viommu ", rc);
+ }
+ }
+}
+
+static void xen_viommu_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->hotpluggable = false;
+ dc->realize = xen_viommu_realize;
+}
+
+static const TypeInfo xen_viommu_info = {
+ .name = TYPE_XEN_VIOMMU_DEVICE,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(XenVIOMMUState),
+ .instance_finalize = xen_viommu_instance_finalize,
+ .class_init = xen_viommu_class_init,
+};
+
+static void xen_viommu_register_types(void)
+{
+ type_register_static(&xen_viommu_info);
+}
+
+type_init(xen_viommu_register_types);
--
1.8.3.1
- [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support, Lan Tianyu, 2017/03/17
- [Qemu-devel] [RFC PATCH 1/4] I440: Allow adding sysbus devices with -device on I440, Lan Tianyu, 2017/03/17
- [Qemu-devel] [RFC PATCH 3/4] xen-pt: bind/unbind interrupt remapping format MSI, Lan Tianyu, 2017/03/17
- [Qemu-devel] [RFC PATCH 2/4] Xen: add a dummy vIOMMU to create/destroy vIOMMU in Xen,
Lan Tianyu <=
- [Qemu-devel] [RFC PATCH 4/4] msi: taking interrupt format into consideration during judging a pirq is binded with a event channel, Lan Tianyu, 2017/03/17
- Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support, no-reply, 2017/03/17
- Re: [Qemu-devel] [RFC PATCH 0/4] Qemu: Add Xen vIOMMU support, Paolo Bonzini, 2017/03/17