# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 6df0bdcf8c9de75280cf40d8bf9583d343a6b41a
# Parent ec68212e72c117392d6388fef266e5aaee4294a6
Add a new config option for all backend drivers. This has two benefits:
1. All backend drivers can be disabled or modularised via
one config option.
2. Backend helper routines that are not specific to any particular driver
can be disabled or modularised based on this config option. In
particular this may allow backend drivers plus the service module
to be upgraded separate from the kernel core as and when the backend
interfaces change (and they will).
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen0_ia64
--- a/buildconfigs/linux-defconfig_xen0_ia64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen0_ia64 Mon Apr 10 17:30:07 2006
@@ -95,6 +95,7 @@
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen0_x86_32
--- a/buildconfigs/linux-defconfig_xen0_x86_32 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen0_x86_32 Mon Apr 10 17:30:07 2006
@@ -1316,6 +1316,7 @@
#
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen0_x86_64
--- a/buildconfigs/linux-defconfig_xen0_x86_64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen0_x86_64 Mon Apr 10 17:30:07 2006
@@ -1246,6 +1246,7 @@
#
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xenU_ia64
--- a/buildconfigs/linux-defconfig_xenU_ia64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xenU_ia64 Mon Apr 10 17:30:07 2006
@@ -92,6 +92,7 @@
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xenU_x86_32
--- a/buildconfigs/linux-defconfig_xenU_x86_32 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xenU_x86_32 Mon Apr 10 17:30:07 2006
@@ -859,13 +859,9 @@
#
# 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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xenU_x86_64
--- a/buildconfigs/linux-defconfig_xenU_x86_64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xenU_x86_64 Mon Apr 10 17:30:07 2006
@@ -1135,13 +1135,9 @@
#
# 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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen_ia64
--- a/buildconfigs/linux-defconfig_xen_ia64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen_ia64 Mon Apr 10 17:30:07 2006
@@ -95,6 +95,7 @@
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen_x86_32
--- a/buildconfigs/linux-defconfig_xen_x86_32 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen_x86_32 Mon Apr 10 17:30:07 2006
@@ -2979,6 +2979,7 @@
#
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d buildconfigs/linux-defconfig_xen_x86_64
--- a/buildconfigs/linux-defconfig_xen_x86_64 Mon Apr 10 17:18:03 2006
+++ b/buildconfigs/linux-defconfig_xen_x86_64 Mon Apr 10 17:30:07 2006
@@ -2656,6 +2656,7 @@
#
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d linux-2.6-xen-sparse/arch/ia64/Kconfig
--- a/linux-2.6-xen-sparse/arch/ia64/Kconfig Mon Apr 10 17:18:03 2006
+++ b/linux-2.6-xen-sparse/arch/ia64/Kconfig Mon Apr 10 17:30:07 2006
@@ -79,8 +79,13 @@
bool
default y
+config XEN_BACKEND
+ depends on XEN
+ bool
+ default y
+
config XEN_BLKDEV_BACKEND
- depends on XEN
+ depends on XEN && XEN_BACKEND
bool
default y
diff -r ec68212e72c1 -r 6df0bdcf8c9d linux-2.6-xen-sparse/drivers/xen/Kconfig
--- a/linux-2.6-xen-sparse/drivers/xen/Kconfig Mon Apr 10 17:18:03 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/Kconfig Mon Apr 10 17:30:07 2006
@@ -28,9 +28,16 @@
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
@@ -70,6 +77,7 @@
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
@@ -91,6 +99,7 @@
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
@@ -120,6 +129,7 @@
config XEN_TPMDEV_BACKEND
tristate "TPM-device backend driver"
+ depends on XEN_BACKEND
default n
help
The TPM-device backend driver
@@ -155,6 +165,7 @@
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d
linux-2.6-xen-sparse/drivers/xen/xenbus/Makefile
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/Makefile Mon Apr 10 17:18:03 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/Makefile Mon Apr 10 17:30:07 2006
@@ -1,4 +1,8 @@
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
diff -r ec68212e72c1 -r 6df0bdcf8c9d
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c Mon Apr 10
17:18:03 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_client.c Mon Apr 10
17:30:07 2006
@@ -259,134 +259,6 @@
xenbus_dev_error(dev, err, "freeing event channel %d", port);
return err;
}
-
-
-/* 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)
diff -r ec68212e72c1 -r 6df0bdcf8c9d
linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_backend_client.c
--- /dev/null Mon Apr 10 17:18:03 2006
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_backend_client.c Mon Apr
10 17:30:07 2006
@@ -0,0 +1,173 @@
+/******************************************************************************
+ * 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:
+ */
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