# HG changeset patch
# User Hollis Blanchard <hollisb@xxxxxxxxxx>
# Node ID 22563db8938def924303f869cd150173b1cc62a4
# Parent e574e8dd4c487af78c62a7892a4978ea7db74d15
[LINUX][POWERPC] Use "inline" xencomm handles (and remove "mini" descriptors)
Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>
---
arch/powerpc/platforms/xen/Makefile | 2
arch/powerpc/platforms/xen/hcall.c | 206 +++++++++++++++--------------------
drivers/xen/core/xencomm.c | 101 ++---------------
include/xen/interface/arch-powerpc.h | 3
include/xen/interface/xencomm.h | 6 -
include/xen/xencomm.h | 24 ++--
6 files changed, 129 insertions(+), 213 deletions(-)
diff -r e574e8dd4c48 -r 22563db8938d arch/powerpc/platforms/xen/Makefile
--- a/arch/powerpc/platforms/xen/Makefile Tue Sep 12 13:10:55 2006 -0500
+++ b/arch/powerpc/platforms/xen/Makefile Tue Sep 12 13:14:59 2006 -0500
@@ -1,4 +1,4 @@ obj-y += setup.o evtchn.o hcall.o udbg_x
-obj-y += setup.o evtchn.o hcall.o udbg_xen.o xen_guest.o reboot.o
+obj-y += setup.o evtchn.o hcall.o udbg_xen.o xen_guest.o reboot.o xencomm.o
# we need the latest __XEN_INTERFACE_VERSION__ (see xen-compat.h)
CFLAGS_hcall.o += -D__XEN_TOOLS__
diff -r e574e8dd4c48 -r 22563db8938d arch/powerpc/platforms/xen/hcall.c
--- a/arch/powerpc/platforms/xen/hcall.c Tue Sep 12 13:10:55 2006 -0500
+++ b/arch/powerpc/platforms/xen/hcall.c Tue Sep 12 13:14:59 2006 -0500
@@ -1,3 +1,23 @@
+/*
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (C) IBM Corp. 2006
+ *
+ * Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
+ */
+
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
@@ -24,9 +44,9 @@
/* Xencomm notes:
*
- * Some hypercalls are made before the memory subsystem is up, so instead of
- * calling xencomm_create(), we allocate XENCOMM_MINI_AREA bytes from the stack
- * to hold the xencomm descriptor.
+ * For kernel memory, we assume that virtually contiguous pages are also
+ * physically contiguous. This allows us to avoid creating descriptors for
+ * kernel hypercalls, such as console and event channel operations.
*
* In general, we need a xencomm descriptor to cover the top-level data
* structure (e.g. the domctl op), plus another for every embedded pointer to
@@ -35,44 +55,24 @@
int HYPERVISOR_console_io(int cmd, int count, char *str)
{
- char xc_area[XENCOMM_MINI_AREA];
- struct xencomm_desc *desc;
- int rc;
-
- rc = xencomm_create_mini(xc_area, XENCOMM_MINI_AREA, str, count,
- &desc);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_console_io),
- cmd, count, __pa(desc));
-
- return rc;
+ void *desc = xencomm_create_inline(str);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_console_io),
+ cmd, count, desc);
}
EXPORT_SYMBOL(HYPERVISOR_console_io);
int HYPERVISOR_event_channel_op(int cmd, void *op)
{
- char xc_area[XENCOMM_MINI_AREA];
- struct xencomm_desc *desc;
- int rc;
-
- rc = xencomm_create_mini(xc_area, XENCOMM_MINI_AREA,
- op, sizeof(evtchn_op_t), &desc);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_event_channel_op),
- cmd, __pa(desc));
- return rc;
+ void *desc = xencomm_create_inline(op);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_event_channel_op),
+ cmd, desc);
}
EXPORT_SYMBOL(HYPERVISOR_event_channel_op);
-int HYPERVISOR_xen_version(int cmd, void *arg)
-{
- /* these calls are small and could be called before the
- * allocator is ready */
- char xc_area[XENCOMM_MINI_AREA];
+int HYPERVISOR_xen_version_userspace(int cmd, void *arg)
+{
struct xencomm_desc *desc;
const unsigned long hcall = __HYPERVISOR_xen_version;
int argsize;
@@ -107,39 +107,40 @@ int HYPERVISOR_xen_version(int cmd, void
printk(KERN_ERR "%s: unknown version cmd %d\n", __func__, cmd);
return -ENOSYS;
}
- rc = xencomm_create_mini(xc_area, XENCOMM_MINI_AREA,
- arg, argsize, &desc);
+
+ rc = xencomm_create(arg, argsize, &desc, GFP_KERNEL);
if (rc)
return rc;
- rc = plpar_hcall_norets(XEN_MARK(hcall), cmd, __pa(desc));
-
- return rc;
-}
-EXPORT_SYMBOL(HYPERVISOR_xen_version);
-
-int HYPERVISOR_physdev_op(int cmd, void *op)
-{
- struct xencomm_desc *desc;
- int rc;
-
- rc = xencomm_create(op, sizeof(physdev_op_t), &desc, GFP_ATOMIC);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_physdev_op),
- cmd, __pa(desc));
+ rc = plpar_hcall_norets(XEN_MARK(hcall), cmd, xencomm_pa(desc));
xencomm_free(desc);
return rc;
}
+EXPORT_SYMBOL(HYPERVISOR_xen_version);
+
+int HYPERVISOR_xen_version(int cmd, void *arg)
+{
+ if (is_kernel_addr((unsigned long)arg)) {
+ void *desc = xencomm_create_inline(arg);
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_xen_version),
cmd, desc);
+ }
+ return HYPERVISOR_xen_version_userspace(cmd, arg);
+}
+
+int HYPERVISOR_physdev_op(int cmd, void *op)
+{
+ void *desc = xencomm_create_inline(op);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_physdev_op),
+ cmd, desc);
+}
EXPORT_SYMBOL(HYPERVISOR_physdev_op);
int HYPERVISOR_grant_table_op(unsigned int cmd, void *op, unsigned int count)
{
- struct xencomm_desc *desc;
- struct xencomm_desc *frame_list;
- long rc;
+ void *desc;
+ void *frame_list;
int argsize;
switch (cmd) {
@@ -155,13 +156,9 @@ int HYPERVISOR_grant_table_op(unsigned i
memcpy(&setup, op, sizeof(setup));
argsize = sizeof(setup);
- rc = xencomm_create(xen_guest_handle(setup.frame_list),
- setup.nr_frames *
sizeof(*xen_guest_handle(setup.frame_list)),
- &frame_list, GFP_KERNEL);
- if (rc)
- return rc;
-
- set_xen_guest_handle(setup.frame_list, (void
*)__pa(frame_list));
+ frame_list =
xencomm_create_inline(xen_guest_handle(setup.frame_list));
+
+ set_xen_guest_handle(setup.frame_list, frame_list);
memcpy(op, &setup, sizeof(setup));
}
break;
@@ -176,24 +173,15 @@ int HYPERVISOR_grant_table_op(unsigned i
return -ENOSYS;
}
- rc = xencomm_create(op, count * argsize, &desc, GFP_KERNEL);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_grant_table_op), cmd,
- __pa(desc), count);
-
- if (cmd == GNTTABOP_setup_table)
- xencomm_free(frame_list);
- xencomm_free(desc);
-
- return rc;
+ desc = xencomm_create_inline(op);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_grant_table_op), cmd,
+ desc, count);
}
EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
int HYPERVISOR_sched_op(int cmd, void *arg)
{
- int rc;
struct xencomm_desc *desc;
ulong argsize;
@@ -205,17 +193,10 @@ int HYPERVISOR_sched_op(int cmd, void *a
break;
case SCHEDOP_shutdown: {
- /* we use a minicom area cuz we could be called from panic() */
- char xc_area[XENCOMM_MINI_AREA];
-
- rc = xencomm_create_mini(xc_area, XENCOMM_MINI_AREA,
- arg, sizeof(sched_shutdown_t), &desc);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_sched_op),
- cmd, __pa(desc));
- return rc;
+ desc = xencomm_create_inline(arg);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_sched_op),
+ cmd, desc);
}
case SCHEDOP_poll:
argsize = sizeof(sched_poll_t);
@@ -228,15 +209,10 @@ int HYPERVISOR_sched_op(int cmd, void *a
return -ENOSYS;
}
- rc = xencomm_create(arg, argsize, &desc, GFP_KERNEL);
- if (rc)
- return rc;
-
- rc = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_sched_op),
- cmd, __pa(desc));
- xencomm_free(desc);
-
- return rc;
+ desc = xencomm_create_inline(arg);
+
+ return plpar_hcall_norets(XEN_MARK(__HYPERVISOR_sched_op),
+ cmd, desc);
}
EXPORT_SYMBOL(HYPERVISOR_sched_op);
@@ -246,6 +222,9 @@ int HYPERVISOR_multicall(void *call_list
return -ENOSYS;
}
EXPORT_SYMBOL(HYPERVISOR_multicall);
+
+
+/* privcmd operations: */
static int xenppc_privcmd_domctl(privcmd_hypercall_t *hypercall)
{
@@ -278,7 +257,7 @@ static int xenppc_privcmd_domctl(privcmd
kern_op.u.getmemlist.max_pfns * sizeof(unsigned long),
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.getmemlist.buffer,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_getpageframeinfo:
break;
@@ -288,7 +267,7 @@ static int xenppc_privcmd_domctl(privcmd
kern_op.u.getpageframeinfo2.num,
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.getpageframeinfo2.array,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_shadow_op:
ret = xencomm_create(
@@ -296,7 +275,7 @@ static int xenppc_privcmd_domctl(privcmd
kern_op.u.shadow_op.pages * sizeof(unsigned long),
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.shadow_op.dirty_bitmap,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_max_mem:
break;
@@ -306,7 +285,7 @@ static int xenppc_privcmd_domctl(privcmd
sizeof(vcpu_guest_context_t),
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.vcpucontext.ctxt,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_getvcpucontext:
ret = xencomm_create(
@@ -314,7 +293,7 @@ static int xenppc_privcmd_domctl(privcmd
sizeof(vcpu_guest_context_t),
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.vcpucontext.ctxt,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_getvcpuinfo:
break;
@@ -325,7 +304,7 @@ static int xenppc_privcmd_domctl(privcmd
(kern_op.u.vcpuaffinity.cpumap.nr_cpus + 7) / 8,
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.vcpuaffinity.cpumap.bitmap,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_DOMCTL_max_vcpus:
case XEN_DOMCTL_scheduler_op:
@@ -347,13 +326,12 @@ static int xenppc_privcmd_domctl(privcmd
if (ret)
goto out; /* error mapping the nested pointer */
- ret = plpar_hcall_norets(XEN_MARK(hypercall->op), __pa(op_desc));
+ ret = plpar_hcall_norets(XEN_MARK(hypercall->op), xencomm_pa(op_desc));
if (copy_to_user(user_op, &kern_op, sizeof(xen_domctl_t)))
ret = -EFAULT;
- if (desc)
- xencomm_free(desc);
+ xencomm_free(desc);
out:
xencomm_free(op_desc);
return ret;
@@ -384,7 +362,7 @@ static int xenppc_privcmd_sysctl(privcmd
kern_op.u.readconsole.count,
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.readconsole.buffer,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
case XEN_SYSCTL_tbuf_op:
case XEN_SYSCTL_physinfo:
@@ -402,7 +380,7 @@ static int xenppc_privcmd_sysctl(privcmd
sizeof(xen_domctl_getdomaininfo_t),
&desc, GFP_KERNEL);
set_xen_guest_handle(kern_op.u.getdomaininfolist.buffer,
- (void *)__pa(desc));
+ xencomm_pa(desc));
break;
default:
printk(KERN_ERR "%s: unknown sysctl cmd %d\n", __func__,
kern_op.cmd);
@@ -412,13 +390,12 @@ static int xenppc_privcmd_sysctl(privcmd
if (ret)
goto out; /* error mapping the nested pointer */
- ret = plpar_hcall_norets(XEN_MARK(hypercall->op), __pa(op_desc));
+ ret = plpar_hcall_norets(XEN_MARK(hypercall->op), xencomm_pa(op_desc));
if (copy_to_user(user_op, &kern_op, sizeof(xen_sysctl_t)))
ret = -EFAULT;
- if (desc)
- xencomm_free(desc);
+ xencomm_free(desc);
out:
xencomm_free(op_desc);
return ret;
@@ -461,13 +438,12 @@ static int xenppc_privcmd_platform_op(pr
if (ret)
goto out; /* error mapping the nested pointer */
- ret = plpar_hcall_norets(XEN_MARK(hypercall->op), __pa(op_desc));
+ ret = plpar_hcall_norets(XEN_MARK(hypercall->op), xencomm_pa(op_desc));
if (copy_to_user(user_op, &kern_op, sizeof(xen_platform_op_t)))
ret = -EFAULT;
- if (desc)
- xencomm_free(desc);
+ xencomm_free(desc);
out:
xencomm_free(op_desc);
return ret;
@@ -502,11 +478,11 @@ int HYPERVISOR_memory_op(unsigned int cm
return ret;
set_xen_guest_handle(mop->extent_start,
- (void *)__pa(desc));
+ xencomm_pa(desc));
}
ret = plpar_hcall_norets(XEN_MARK(__HYPERVISOR_memory_op),
- cmd, __pa(op_desc));
+ cmd, xencomm_pa(op_desc));
xencomm_free(desc);
}
@@ -579,7 +555,7 @@ static int xenppc_privcmd_event_channel_
return ret;
ret = plpar_hcall_norets(XEN_MARK(hypercall->op), hypercall->arg[0],
- __pa(desc));
+ xencomm_pa(desc));
xencomm_free(desc);
return ret;
diff -r e574e8dd4c48 -r 22563db8938d drivers/xen/core/xencomm.c
--- a/drivers/xen/core/xencomm.c Tue Sep 12 13:10:55 2006 -0500
+++ b/drivers/xen/core/xencomm.c Tue Sep 12 13:14:59 2006 -0500
@@ -1,6 +1,4 @@
/*
- * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation
- *
* 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
@@ -14,6 +12,10 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (C) IBM Corp. 2006
+ *
+ * Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
*/
#include <linux/gfp.h>
@@ -21,42 +23,11 @@
#include <asm/page.h>
#include <xen/xencomm.h>
-int xencomm_debug;
-
-/* translate virtual address to physical address */
-static unsigned long xen_vaddr_to_paddr(unsigned long vaddr)
-{
- struct page *page;
- struct vm_area_struct *vma;
-
- if (vaddr > TASK_SIZE) {
- /* kernel address */
- return __pa(vaddr);
- }
-
- /* XXX double-check (lack of) locking */
- vma = find_extend_vma(current->mm, vaddr);
- if (!vma)
- return ~0UL;
-
- page = follow_page(vma, vaddr, 0);
- if (!page)
- return ~0UL;
-
- return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK);
-}
-
static int xencomm_init(struct xencomm_desc *desc,
void *buffer, unsigned long bytes)
{
unsigned long recorded = 0;
int i = 0;
-
- BUG_ON((buffer == NULL) && (bytes > 0));
-
- /* record the physical pages used */
- if (buffer == NULL)
- desc->nr_addrs = 0;
while ((recorded < bytes) && (i < desc->nr_addrs)) {
unsigned long vaddr = (unsigned long)buffer + recorded;
@@ -67,7 +38,7 @@ static int xencomm_init(struct xencomm_d
offset = vaddr % PAGE_SIZE; /* handle partial pages */
chunksz = min(PAGE_SIZE - offset, bytes - recorded);
- paddr = xen_vaddr_to_paddr(vaddr);
+ paddr = xencomm_vtop(vaddr);
if (paddr == ~0UL) {
printk("%s: couldn't translate vaddr %lx\n",
__func__, vaddr);
@@ -98,11 +69,10 @@ static struct xencomm_desc *xencomm_allo
{
struct xencomm_desc *desc;
- /* XXX could we call this from irq context? */
desc = (struct xencomm_desc *)__get_free_page(gfp_mask);
- if (desc == NULL) {
- panic("%s: page allocation failed\n", __func__);
- }
+ if (desc == NULL)
+ return NULL;
+
desc->nr_addrs = (PAGE_SIZE - sizeof(struct xencomm_desc)) /
sizeof(*desc->address);
@@ -120,13 +90,16 @@ int xencomm_create(void *buffer, unsigne
struct xencomm_desc *desc;
int rc;
- if (xencomm_debug) {
- if ((!buffer) || (bytes == 0)) {
- printk(KERN_ERR "%s: NULL buffer\n", __func__);
- return 0;
- }
- printk("%s: %p[%ld]\n", __func__, buffer, bytes);
+ pr_debug("%s: %p[%ld]\n", __func__, buffer, bytes);
+
+ if (bytes == 0) {
+ /* don't create a descriptor; Xen recognizes NULL. */
+ BUG_ON(buffer != NULL);
+ *ret = NULL;
+ return 0;
}
+
+ BUG_ON(buffer == NULL); /* 'bytes' is non-zero */
desc = xencomm_alloc(gfp_mask);
if (!desc) {
@@ -145,43 +118,3 @@ int xencomm_create(void *buffer, unsigne
return 0;
}
-/* "mini" routines, for stack-based communications: */
-
-static void *xencomm_alloc_mini(void *area, int arealen)
-{
- unsigned long base = (unsigned long)area;
- unsigned int left_in_page;
-
- left_in_page = PAGE_SIZE - base % PAGE_SIZE;
-
- /* we probably fit right at the front of area */
- if (left_in_page >= sizeof(struct xencomm_mini)) {
- return area;
- }
-
- /* if not, see if area is big enough to advance to the next page */
- if ((arealen - left_in_page) >= sizeof(struct xencomm_mini))
- return (void *)(base + left_in_page);
-
- /* area was too small */
- return NULL;
-}
-
-int xencomm_create_mini(void *area, int arealen, void *buffer,
- unsigned long bytes, struct xencomm_desc **ret)
-{
- struct xencomm_desc *desc;
- int rc;
-
- desc = xencomm_alloc_mini(area, arealen);
- if (!desc)
- return -ENOMEM;
- desc->nr_addrs = XENCOMM_MINI_ADDRS;
-
- rc = xencomm_init(desc, buffer, bytes);
- if (rc)
- return rc;
-
- *ret = desc;
- return 0;
-}
diff -r e574e8dd4c48 -r 22563db8938d include/xen/interface/arch-powerpc.h
--- a/include/xen/interface/arch-powerpc.h Tue Sep 12 13:10:55 2006 -0500
+++ b/include/xen/interface/arch-powerpc.h Tue Sep 12 13:14:59 2006 -0500
@@ -42,6 +42,7 @@
#endif
#ifndef __ASSEMBLY__
+
typedef uint64_t uint64_aligned_t;
/* Guest handles for primitive C types. */
@@ -71,6 +72,8 @@ DEFINE_XEN_GUEST_HANDLE(xen_pfn_t);
#define TRAP_INSTR "li 0,-1; sc" /* XXX just "sc"? */
#ifndef __ASSEMBLY__
+
+#define XENCOMM_INLINE_FLAG (1UL << 63)
typedef uint64_t xen_ulong_t;
diff -r e574e8dd4c48 -r 22563db8938d include/xen/interface/xencomm.h
--- a/include/xen/interface/xencomm.h Tue Sep 12 13:10:55 2006 -0500
+++ b/include/xen/interface/xencomm.h Tue Sep 12 13:14:59 2006 -0500
@@ -1,6 +1,4 @@
/*
- * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation
- *
* 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
@@ -14,6 +12,10 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (C) IBM Corp. 2006
+ *
+ * Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
*/
#ifndef _XEN_XENCOMM_H_
diff -r e574e8dd4c48 -r 22563db8938d include/xen/xencomm.h
--- a/include/xen/xencomm.h Tue Sep 12 13:10:55 2006 -0500
+++ b/include/xen/xencomm.h Tue Sep 12 13:14:59 2006 -0500
@@ -1,6 +1,4 @@
/*
- * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation
- *
* 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
@@ -14,6 +12,10 @@
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (C) IBM Corp. 2006
+ *
+ * Authors: Hollis Blanchard <hollisb@xxxxxxxxxx>
*/
#ifndef _LINUX_XENCOMM_H_
@@ -21,17 +23,17 @@
#include <xen/interface/xencomm.h>
-#define XENCOMM_MINI_ADDRS 3
-struct xencomm_mini {
- struct xencomm_desc _desc;
- uint64_t address[XENCOMM_MINI_ADDRS];
-};
-#define XENCOMM_MINI_AREA (sizeof(struct xencomm_mini) * 2)
-
extern int xencomm_create(void *buffer, unsigned long bytes,
struct xencomm_desc **desc, gfp_t type);
extern void xencomm_free(struct xencomm_desc *desc);
-extern int xencomm_create_mini(void *area, int arealen, void *buffer,
- unsigned long bytes, struct xencomm_desc **ret);
+
+/* provided by architecture code: */
+extern void *xencomm_create_inline(void *ptr);
+extern unsigned long xencomm_vtop(unsigned long vaddr);
+
+static inline void *xencomm_pa(void *ptr)
+{
+ return (void *)xencomm_vtop((unsigned long)ptr);
+}
#endif /* _LINUX_XENCOMM_H_ */
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