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Bug-fix:

Browse Source 
- Fix ARM and Xen FIFO not working.
  - Remove more Xen ia64 vestigates.
  - Fix UAPI missing Xen files.
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Merge tag 'stable/for-linus-3.14-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull Xen bugfixes from Konrad Rzeszutek Wilk:
 "This has an healthy amount of code being removed - which we do not use
  anymore (the only user of it was ia64 Xen which had been removed
  already).  The other bug-fixes are to make Xen ARM be able to use the
  new event channel mechanism and proper export of header files to
  user-space.

  Summary:
   - Fix ARM and Xen FIFO not working.
   - Remove more Xen ia64 vestigates.
   - Fix UAPI missing Xen files"

* tag 'stable/for-linus-3.14-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  ia64/xen: Remove Xen support for ia64 even more
  xen: install xen/gntdev.h and xen/gntalloc.h
  xen/events: bind all new interdomain events to VCPU0
This commit is contained in:
Linus Torvalds 2014-02-12 12:28:05 -08:00
commit 4675348e78
8 changed files with 4 additions and 338 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/xen/Makefile
View File

@ -16,7 +16,6 @@ xen-pad-$(CONFIG_X86) += xen-acpi-pad.o
dom0-$(CONFIG_X86) += pcpu.o
obj-$(CONFIG_XEN_DOM0) += $(dom0-y)
obj-$(CONFIG_BLOCK) += biomerge.o
obj-$(CONFIG_XEN_XENCOMM) += xencomm.o
obj-$(CONFIG_XEN_BALLOON) += xen-balloon.o
obj-$(CONFIG_XEN_SELFBALLOONING) += xen-selfballoon.o
obj-$(CONFIG_XEN_DEV_EVTCHN) += xen-evtchn.o

2
drivers/xen/events/events_base.c
View File

@ -862,6 +862,8 @@ int bind_evtchn_to_irq(unsigned int evtchn)
irq = ret;
goto out;
}
/* New interdomain events are bound to VCPU 0. */
bind_evtchn_to_cpu(evtchn, 0);
} else {
struct irq_info *info = info_for_irq(irq);
WARN_ON(info == NULL || info->type != IRQT_EVTCHN);

219
drivers/xen/xencomm.c
View File

@ -1,219 +0,0 @@
/*
* 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@us.ibm.com>
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/mm.h>
#include <linux/slab.h>
#include <asm/page.h>
#include <xen/xencomm.h>
#include <xen/interface/xen.h>
#include <asm/xen/xencomm.h> /* for xencomm_is_phys_contiguous() */
static int xencomm_init(struct xencomm_desc *desc,
void *buffer, unsigned long bytes)
{
unsigned long recorded = 0;
int i = 0;
while ((recorded < bytes) && (i < desc->nr_addrs)) {
unsigned long vaddr = (unsigned long)buffer + recorded;
unsigned long paddr;
int offset;
int chunksz;
offset = vaddr % PAGE_SIZE; /* handle partial pages */
chunksz = min(PAGE_SIZE - offset, bytes - recorded);
paddr = xencomm_vtop(vaddr);
if (paddr == ~0UL) {
printk(KERN_DEBUG "%s: couldn't translate vaddr %lx\n",
__func__, vaddr);
return -EINVAL;
}
desc->address[i++] = paddr;
recorded += chunksz;
}
if (recorded < bytes) {
printk(KERN_DEBUG
"%s: could only translate %ld of %ld bytes\n",
__func__, recorded, bytes);
return -ENOSPC;
}
/* mark remaining addresses invalid (just for safety) */
while (i < desc->nr_addrs)
desc->address[i++] = XENCOMM_INVALID;
desc->magic = XENCOMM_MAGIC;
return 0;
}
static struct xencomm_desc *xencomm_alloc(gfp_t gfp_mask,
void *buffer, unsigned long bytes)
{
struct xencomm_desc *desc;
unsigned long buffer_ulong = (unsigned long)buffer;
unsigned long start = buffer_ulong & PAGE_MASK;
unsigned long end = (buffer_ulong + bytes) | ~PAGE_MASK;
unsigned long nr_addrs = (end - start + 1) >> PAGE_SHIFT;
unsigned long size = sizeof(*desc) +
sizeof(desc->address[0]) * nr_addrs;
/*
* slab allocator returns at least sizeof(void*) aligned pointer.
* When sizeof(*desc) > sizeof(void*), struct xencomm_desc might
* cross page boundary.
*/
if (sizeof(*desc) > sizeof(void *)) {
unsigned long order = get_order(size);
desc = (struct xencomm_desc *)__get_free_pages(gfp_mask,
order);
if (desc == NULL)
return NULL;
desc->nr_addrs =
((PAGE_SIZE << order) - sizeof(struct xencomm_desc)) /
sizeof(*desc->address);
} else {
desc = kmalloc(size, gfp_mask);
if (desc == NULL)
return NULL;
desc->nr_addrs = nr_addrs;
}
return desc;
}
void xencomm_free(struct xencomm_handle *desc)
{
if (desc && !((ulong)desc & XENCOMM_INLINE_FLAG)) {
struct xencomm_desc *desc__ = (struct xencomm_desc *)desc;
if (sizeof(*desc__) > sizeof(void *)) {
unsigned long size = sizeof(*desc__) +
sizeof(desc__->address[0]) * desc__->nr_addrs;
unsigned long order = get_order(size);
free_pages((unsigned long)__va(desc), order);
} else
kfree(__va(desc));
}
}
static int xencomm_create(void *buffer, unsigned long bytes,
struct xencomm_desc **ret, gfp_t gfp_mask)
{
struct xencomm_desc *desc;
int rc;
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, buffer, bytes);
if (!desc) {
printk(KERN_DEBUG "%s failure\n", "xencomm_alloc");
return -ENOMEM;
}
rc = xencomm_init(desc, buffer, bytes);
if (rc) {
printk(KERN_DEBUG "%s failure: %d\n", "xencomm_init", rc);
xencomm_free((struct xencomm_handle *)__pa(desc));
return rc;
}
*ret = desc;
return 0;
}
static struct xencomm_handle *xencomm_create_inline(void *ptr)
{
unsigned long paddr;
BUG_ON(!xencomm_is_phys_contiguous((unsigned long)ptr));
paddr = (unsigned long)xencomm_pa(ptr);
BUG_ON(paddr & XENCOMM_INLINE_FLAG);
return (struct xencomm_handle *)(paddr | XENCOMM_INLINE_FLAG);
}
/* "mini" routine, for stack-based communications: */
static int xencomm_create_mini(void *buffer,
unsigned long bytes, struct xencomm_mini *xc_desc,
struct xencomm_desc **ret)
{
int rc = 0;
struct xencomm_desc *desc;
BUG_ON(((unsigned long)xc_desc) % sizeof(*xc_desc) != 0);
desc = (void *)xc_desc;
desc->nr_addrs = XENCOMM_MINI_ADDRS;
rc = xencomm_init(desc, buffer, bytes);
if (!rc)
*ret = desc;
return rc;
}
struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes)
{
int rc;
struct xencomm_desc *desc;
if (xencomm_is_phys_contiguous((unsigned long)ptr))
return xencomm_create_inline(ptr);
rc = xencomm_create(ptr, bytes, &desc, GFP_KERNEL);
if (rc || desc == NULL)
return NULL;
return xencomm_pa(desc);
}
struct xencomm_handle *__xencomm_map_no_alloc(void *ptr, unsigned long bytes,
struct xencomm_mini *xc_desc)
{
int rc;
struct xencomm_desc *desc = NULL;
if (xencomm_is_phys_contiguous((unsigned long)ptr))
return xencomm_create_inline(ptr);
rc = xencomm_create_mini(ptr, bytes, xc_desc,
&desc);
if (rc)
return NULL;
return xencomm_pa(desc);
}

2
include/uapi/xen/Kbuild
View File

@ -1,3 +1,5 @@
# UAPI Header export list
header-y += evtchn.h
header-y += gntalloc.h
header-y += gntdev.h
header-y += privcmd.h

0
include/xen/gntalloc.h → include/uapi/xen/gntalloc.h
View File

0
include/xen/gntdev.h → include/uapi/xen/gntdev.h
View File

41
include/xen/interface/xencomm.h
View File

@ -1,41 +0,0 @@
/*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (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.
*
* Copyright (C) IBM Corp. 2006
*/
#ifndef _XEN_XENCOMM_H_
#define _XEN_XENCOMM_H_
/* A xencomm descriptor is a scatter/gather list containing physical
* addresses corresponding to a virtually contiguous memory area. The
* hypervisor translates these physical addresses to machine addresses to copy
* to and from the virtually contiguous area.
*/
#define XENCOMM_MAGIC 0x58434F4D /* 'XCOM' */
#define XENCOMM_INVALID (~0UL)
struct xencomm_desc {
uint32_t magic;
uint32_t nr_addrs; /* the number of entries in address[] */
uint64_t address[0];
};
#endif /* _XEN_XENCOMM_H_ */

77
include/xen/xencomm.h
View File

@ -1,77 +0,0 @@
/*
* 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@us.ibm.com>
* Jerone Young <jyoung5@us.ibm.com>
*/
#ifndef _LINUX_XENCOMM_H_
#define _LINUX_XENCOMM_H_
#include <xen/interface/xencomm.h>
#define XENCOMM_MINI_ADDRS 3
struct xencomm_mini {
struct xencomm_desc _desc;
uint64_t address[XENCOMM_MINI_ADDRS];
};
/* To avoid additionnal virt to phys conversion, an opaque structure is
presented. */
struct xencomm_handle;
extern void xencomm_free(struct xencomm_handle *desc);
extern struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes);
extern struct xencomm_handle *__xencomm_map_no_alloc(void *ptr,
unsigned long bytes, struct xencomm_mini *xc_area);
#if 0
#define XENCOMM_MINI_ALIGNED(xc_desc, n) \
struct xencomm_mini xc_desc ## _base[(n)] \
__attribute__((__aligned__(sizeof(struct xencomm_mini)))); \
struct xencomm_mini *xc_desc = &xc_desc ## _base[0];
#else
/*
* gcc bug workaround:
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
* gcc doesn't handle properly stack variable with
* __attribute__((__align__(sizeof(struct xencomm_mini))))
*/
#define XENCOMM_MINI_ALIGNED(xc_desc, n) \
unsigned char xc_desc ## _base[((n) + 1 ) * \
sizeof(struct xencomm_mini)]; \
struct xencomm_mini *xc_desc = (struct xencomm_mini *) \
((unsigned long)xc_desc ## _base + \
(sizeof(struct xencomm_mini) - \
((unsigned long)xc_desc ## _base) % \
sizeof(struct xencomm_mini)));
#endif
#define xencomm_map_no_alloc(ptr, bytes) \
({ XENCOMM_MINI_ALIGNED(xc_desc, 1); \
__xencomm_map_no_alloc(ptr, bytes, xc_desc); })
/* provided by architecture code: */
extern unsigned long xencomm_vtop(unsigned long vaddr);
static inline void *xencomm_pa(void *ptr)
{
return (void *)xencomm_vtop((unsigned long)ptr);
}
#define xen_guest_handle(hnd) ((hnd).p)
#endif /* _LINUX_XENCOMM_H_ */