CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_BLKDEV_GRANT=y
CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_SYSFS=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
#
CONFIG_XEN_PRIVILEGED_GUEST=y
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND=y
# CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
#
CONFIG_XEN_PRIVILEGED_GUEST=y
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND=y
# CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_BLKDEV_GRANT=y
CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_SYSFS=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
#
# CONFIG_XEN_PRIVILEGED_GUEST is not set
CONFIG_XEN_UNPRIVILEGED_GUEST=y
-# CONFIG_XEN_PCIDEV_BACKEND is not set
-# CONFIG_XEN_BLKDEV_BACKEND is not set
-# CONFIG_XEN_NETDEV_BACKEND is not set
-# CONFIG_XEN_TPMDEV_BACKEND is not set
+# CONFIG_XEN_BACKEND is not set
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y
-# CONFIG_XEN_BLKDEV_TAP is not set
# CONFIG_XEN_TPMDEV_FRONTEND is not set
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DISABLE_SERIAL=y
#
# CONFIG_XEN_PRIVILEGED_GUEST is not set
CONFIG_XEN_UNPRIVILEGED_GUEST=y
-# CONFIG_XEN_PCIDEV_BACKEND is not set
-# CONFIG_XEN_BLKDEV_BACKEND is not set
-# CONFIG_XEN_NETDEV_BACKEND is not set
-# CONFIG_XEN_TPMDEV_BACKEND is not set
+# CONFIG_XEN_BACKEND is not set
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y
-# CONFIG_XEN_BLKDEV_TAP is not set
# CONFIG_XEN_TPMDEV_FRONTEND is not set
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DISABLE_SERIAL=y
CONFIG_XEN_PRIVILEGED_GUEST=y
CONFIG_XEN_BLKDEV_GRANT=y
CONFIG_XEN_BLKDEV_FRONTEND=y
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_SYSFS=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
#
CONFIG_XEN_PRIVILEGED_GUEST=y
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND=y
# CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
#
CONFIG_XEN_PRIVILEGED_GUEST=y
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
+CONFIG_XEN_BACKEND=y
CONFIG_XEN_PCIDEV_BACKEND=y
# CONFIG_XEN_PCIDEV_BACKEND_VPCI is not set
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
bool
default y
-config XEN_BLKDEV_BACKEND
+config XEN_BACKEND
depends on XEN
bool
default y
+config XEN_BLKDEV_BACKEND
+ depends on XEN && XEN_BACKEND
+ bool
+ default y
+
config XEN_SYSFS
bool "Export Xen attributes in sysfs"
depends on XEN && SYSFS
bool
default !XEN_PRIVILEGED_GUEST
+config XEN_BACKEND
+ tristate "Backend driver support"
+ default y
+ help
+ Support for backend device drivers that provide I/O services
+ to other virtual machines.
+
config XEN_PCIDEV_BACKEND
tristate "PCI device backend driver"
- depends PCI
+ depends on PCI && XEN_BACKEND
default XEN_PRIVILEGED_GUEST
help
The PCI device backend driver allows the kernel to export arbitrary
config XEN_BLKDEV_BACKEND
tristate "Block-device backend driver"
+ depends on XEN_BACKEND
default y
help
The block-device backend driver allows the kernel to export its
config XEN_NETDEV_BACKEND
tristate "Network-device backend driver"
+ depends on XEN_BACKEND
default y
help
The network-device backend driver allows the kernel to export its
config XEN_TPMDEV_BACKEND
tristate "TPM-device backend driver"
+ depends on XEN_BACKEND
default n
help
The TPM-device backend driver
config XEN_BLKDEV_TAP
tristate "Block device tap driver"
+ depends on XEN_BACKEND
default n
help
This driver allows a VM to interact on block device channels
obj-y += xenbus.o
+obj-$(CONFIG_XEN_BACKEND) += xenbus_be.o
+
+xenbus_be-objs =
+xenbus_be-objs += xenbus_backend_client.o
xenbus-objs =
xenbus-objs += xenbus_client.o
--- /dev/null
+/******************************************************************************
+ * Backend-client-facing interface for the Xenbus driver. In other words, the
+ * interface between the Xenbus and the device-specific code in the backend
+ * driver.
+ *
+ * Copyright (C) 2005-2006 XenSource Ltd
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include <xen/gnttab.h>
+#include <xen/xenbus.h>
+#include <xen/driver_util.h>
+
+/* Based on Rusty Russell's skeleton driver's map_page */
+int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
+{
+ struct gnttab_map_grant_ref op = {
+ .flags = GNTMAP_host_map,
+ .ref = gnt_ref,
+ .dom = dev->otherend_id,
+ };
+ struct vm_struct *area;
+
+ *vaddr = NULL;
+
+ area = alloc_vm_area(PAGE_SIZE);
+ if (!area)
+ return -ENOMEM;
+
+ op.host_addr = (unsigned long)area->addr;
+
+ lock_vm_area(area);
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
+ unlock_vm_area(area);
+
+ if (op.status != GNTST_okay) {
+ free_vm_area(area);
+ xenbus_dev_fatal(dev, op.status,
+ "mapping in shared page %d from domain %d",
+ gnt_ref, dev->otherend_id);
+ return op.status;
+ }
+
+ /* Stuff the handle in an unused field */
+ area->phys_addr = (unsigned long)op.handle;
+
+ *vaddr = area->addr;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
+
+
+int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
+ grant_handle_t *handle, void *vaddr)
+{
+ struct gnttab_map_grant_ref op = {
+ .host_addr = (unsigned long)vaddr,
+ .flags = GNTMAP_host_map,
+ .ref = gnt_ref,
+ .dom = dev->otherend_id,
+ };
+
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
+
+ if (op.status != GNTST_okay) {
+ xenbus_dev_fatal(dev, op.status,
+ "mapping in shared page %d from domain %d",
+ gnt_ref, dev->otherend_id);
+ } else
+ *handle = op.handle;
+
+ return op.status;
+}
+EXPORT_SYMBOL_GPL(xenbus_map_ring);
+
+
+/* Based on Rusty Russell's skeleton driver's unmap_page */
+int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
+{
+ struct vm_struct *area;
+ struct gnttab_unmap_grant_ref op = {
+ .host_addr = (unsigned long)vaddr,
+ };
+
+ /* It'd be nice if linux/vmalloc.h provided a find_vm_area(void *addr)
+ * method so that we don't have to muck with vmalloc internals here.
+ * We could force the user to hang on to their struct vm_struct from
+ * xenbus_map_ring_valloc, but these 6 lines considerably simplify
+ * this API.
+ */
+ read_lock(&vmlist_lock);
+ for (area = vmlist; area != NULL; area = area->next) {
+ if (area->addr == vaddr)
+ break;
+ }
+ read_unlock(&vmlist_lock);
+
+ if (!area) {
+ xenbus_dev_error(dev, -ENOENT,
+ "can't find mapped virtual address %p", vaddr);
+ return GNTST_bad_virt_addr;
+ }
+
+ op.handle = (grant_handle_t)area->phys_addr;
+
+ lock_vm_area(area);
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
+ unlock_vm_area(area);
+
+ if (op.status == GNTST_okay)
+ free_vm_area(area);
+ else
+ xenbus_dev_error(dev, op.status,
+ "unmapping page at handle %d error %d",
+ (int16_t)area->phys_addr, op.status);
+
+ return op.status;
+}
+EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
+
+
+int xenbus_unmap_ring(struct xenbus_device *dev,
+ grant_handle_t handle, void *vaddr)
+{
+ struct gnttab_unmap_grant_ref op = {
+ .host_addr = (unsigned long)vaddr,
+ .handle = handle,
+ };
+
+ BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
+
+ if (op.status != GNTST_okay)
+ xenbus_dev_error(dev, op.status,
+ "unmapping page at handle %d error %d",
+ handle, op.status);
+
+ return op.status;
+}
+EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
+
+
+/*
+ * Local variables:
+ * c-file-style: "linux"
+ * indent-tabs-mode: t
+ * c-indent-level: 8
+ * c-basic-offset: 8
+ * tab-width: 8
+ * End:
+ */
}
-/* Based on Rusty Russell's skeleton driver's map_page */
-int xenbus_map_ring_valloc(struct xenbus_device *dev, int gnt_ref, void **vaddr)
-{
- struct gnttab_map_grant_ref op = {
- .flags = GNTMAP_host_map,
- .ref = gnt_ref,
- .dom = dev->otherend_id,
- };
- struct vm_struct *area;
-
- *vaddr = NULL;
-
- area = alloc_vm_area(PAGE_SIZE);
- if (!area)
- return -ENOMEM;
-
- op.host_addr = (unsigned long)area->addr;
-
- lock_vm_area(area);
- BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
- unlock_vm_area(area);
-
- if (op.status != GNTST_okay) {
- free_vm_area(area);
- xenbus_dev_fatal(dev, op.status,
- "mapping in shared page %d from domain %d",
- gnt_ref, dev->otherend_id);
- return op.status;
- }
-
- /* Stuff the handle in an unused field */
- area->phys_addr = (unsigned long)op.handle;
-
- *vaddr = area->addr;
- return 0;
-}
-EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);
-
-
-int xenbus_map_ring(struct xenbus_device *dev, int gnt_ref,
- grant_handle_t *handle, void *vaddr)
-{
- struct gnttab_map_grant_ref op = {
- .host_addr = (unsigned long)vaddr,
- .flags = GNTMAP_host_map,
- .ref = gnt_ref,
- .dom = dev->otherend_id,
- };
-
- BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, &op, 1));
-
- if (op.status != GNTST_okay) {
- xenbus_dev_fatal(dev, op.status,
- "mapping in shared page %d from domain %d",
- gnt_ref, dev->otherend_id);
- } else
- *handle = op.handle;
-
- return op.status;
-}
-EXPORT_SYMBOL_GPL(xenbus_map_ring);
-
-
-/* Based on Rusty Russell's skeleton driver's unmap_page */
-int xenbus_unmap_ring_vfree(struct xenbus_device *dev, void *vaddr)
-{
- struct vm_struct *area;
- struct gnttab_unmap_grant_ref op = {
- .host_addr = (unsigned long)vaddr,
- };
-
- /* It'd be nice if linux/vmalloc.h provided a find_vm_area(void *addr)
- * method so that we don't have to muck with vmalloc internals here.
- * We could force the user to hang on to their struct vm_struct from
- * xenbus_map_ring_valloc, but these 6 lines considerably simplify
- * this API.
- */
- read_lock(&vmlist_lock);
- for (area = vmlist; area != NULL; area = area->next) {
- if (area->addr == vaddr)
- break;
- }
- read_unlock(&vmlist_lock);
-
- if (!area) {
- xenbus_dev_error(dev, -ENOENT,
- "can't find mapped virtual address %p", vaddr);
- return GNTST_bad_virt_addr;
- }
-
- op.handle = (grant_handle_t)area->phys_addr;
-
- lock_vm_area(area);
- BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
- unlock_vm_area(area);
-
- if (op.status == GNTST_okay)
- free_vm_area(area);
- else
- xenbus_dev_error(dev, op.status,
- "unmapping page at handle %d error %d",
- (int16_t)area->phys_addr, op.status);
-
- return op.status;
-}
-EXPORT_SYMBOL_GPL(xenbus_unmap_ring_vfree);
-
-
-int xenbus_unmap_ring(struct xenbus_device *dev,
- grant_handle_t handle, void *vaddr)
-{
- struct gnttab_unmap_grant_ref op = {
- .host_addr = (unsigned long)vaddr,
- .handle = handle,
- };
-
- BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1));
-
- if (op.status != GNTST_okay)
- xenbus_dev_error(dev, op.status,
- "unmapping page at handle %d error %d",
- handle, op.status);
-
- return op.status;
-}
-EXPORT_SYMBOL_GPL(xenbus_unmap_ring);
-
-
XenbusState xenbus_read_driver_state(const char *path)
{
XenbusState result;
projects / people / vhanquez / xen.git / commitdiff