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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

Browse Source 
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
parent 9398a10cd9 d8320b2d2e
commit 4675348e78
8 changed files with 4 additions and 338 deletions
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82
include/xen/gntalloc.h
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@@ -1,82 +0,0 @@
/******************************************************************************
* gntalloc.h
*
* Interface to /dev/xen/gntalloc.
*
* Author: Daniel De Graaf <dgdegra@tycho.nsa.gov>
*
* This file is in the public domain.
*/
#ifndef __LINUX_PUBLIC_GNTALLOC_H__
#define __LINUX_PUBLIC_GNTALLOC_H__
/*
* Allocates a new page and creates a new grant reference.
*/
#define IOCTL_GNTALLOC_ALLOC_GREF \
_IOC(_IOC_NONE, 'G', 5, sizeof(struct ioctl_gntalloc_alloc_gref))
struct ioctl_gntalloc_alloc_gref {
/* IN parameters */
/* The ID of the domain to be given access to the grants. */
uint16_t domid;
/* Flags for this mapping */
uint16_t flags;
/* Number of pages to map */
uint32_t count;
/* OUT parameters */
/* The offset to be used on a subsequent call to mmap(). */
uint64_t index;
/* The grant references of the newly created grant, one per page */
/* Variable size, depending on count */
uint32_t gref_ids[1];
};
#define GNTALLOC_FLAG_WRITABLE 1
/*
* Deallocates the grant reference, allowing the associated page to be freed if
* no other domains are using it.
*/
#define IOCTL_GNTALLOC_DEALLOC_GREF \
_IOC(_IOC_NONE, 'G', 6, sizeof(struct ioctl_gntalloc_dealloc_gref))
struct ioctl_gntalloc_dealloc_gref {
/* IN parameters */
/* The offset returned in the map operation */
uint64_t index;
/* Number of references to unmap */
uint32_t count;
};
/*
* Sets up an unmap notification within the page, so that the other side can do
* cleanup if this side crashes. Required to implement cross-domain robust
* mutexes or close notification on communication channels.
*
* Each mapped page only supports one notification; multiple calls referring to
* the same page overwrite the previous notification. You must clear the
* notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it
* to occur.
*/
#define IOCTL_GNTALLOC_SET_UNMAP_NOTIFY \
_IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntalloc_unmap_notify))
struct ioctl_gntalloc_unmap_notify {
/* IN parameters */
/* Offset in the file descriptor for a byte within the page (same as
* used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to
* be cleared. Otherwise, it can be any byte in the page whose
* notification we are adjusting.
*/
uint64_t index;
/* Action(s) to take on unmap */
uint32_t action;
/* Event channel to notify */
uint32_t event_channel_port;
};
/* Clear (set to zero) the byte specified by index */
#define UNMAP_NOTIFY_CLEAR_BYTE 0x1
/* Send an interrupt on the indicated event channel */
#define UNMAP_NOTIFY_SEND_EVENT 0x2
#endif /* __LINUX_PUBLIC_GNTALLOC_H__ */

150
include/xen/gntdev.h
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@@ -1,150 +0,0 @@
/******************************************************************************
* gntdev.h
*
* Interface to /dev/xen/gntdev.
*
* Copyright (c) 2007, D G Murray
*
* 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.
*/
#ifndef __LINUX_PUBLIC_GNTDEV_H__
#define __LINUX_PUBLIC_GNTDEV_H__
struct ioctl_gntdev_grant_ref {
/* The domain ID of the grant to be mapped. */
uint32_t domid;
/* The grant reference of the grant to be mapped. */
uint32_t ref;
};
/*
* Inserts the grant references into the mapping table of an instance
* of gntdev. N.B. This does not perform the mapping, which is deferred
* until mmap() is called with @index as the offset.
*/
#define IOCTL_GNTDEV_MAP_GRANT_REF \
_IOC(_IOC_NONE, 'G', 0, sizeof(struct ioctl_gntdev_map_grant_ref))
struct ioctl_gntdev_map_grant_ref {
/* IN parameters */
/* The number of grants to be mapped. */
uint32_t count;
uint32_t pad;
/* OUT parameters */
/* The offset to be used on a subsequent call to mmap(). */
uint64_t index;
/* Variable IN parameter. */
/* Array of grant references, of size @count. */
struct ioctl_gntdev_grant_ref refs[1];
};
/*
* Removes the grant references from the mapping table of an instance of
* of gntdev. N.B. munmap() must be called on the relevant virtual address(es)
* before this ioctl is called, or an error will result.
*/
#define IOCTL_GNTDEV_UNMAP_GRANT_REF \
_IOC(_IOC_NONE, 'G', 1, sizeof(struct ioctl_gntdev_unmap_grant_ref))
struct ioctl_gntdev_unmap_grant_ref {
/* IN parameters */
/* The offset was returned by the corresponding map operation. */
uint64_t index;
/* The number of pages to be unmapped. */
uint32_t count;
uint32_t pad;
};
/*
* Returns the offset in the driver's address space that corresponds
* to @vaddr. This can be used to perform a munmap(), followed by an
* UNMAP_GRANT_REF ioctl, where no state about the offset is retained by
* the caller. The number of pages that were allocated at the same time as
* @vaddr is returned in @count.
*
* N.B. Where more than one page has been mapped into a contiguous range, the
* supplied @vaddr must correspond to the start of the range; otherwise
* an error will result. It is only possible to munmap() the entire
* contiguously-allocated range at once, and not any subrange thereof.
*/
#define IOCTL_GNTDEV_GET_OFFSET_FOR_VADDR \
_IOC(_IOC_NONE, 'G', 2, sizeof(struct ioctl_gntdev_get_offset_for_vaddr))
struct ioctl_gntdev_get_offset_for_vaddr {
/* IN parameters */
/* The virtual address of the first mapped page in a range. */
uint64_t vaddr;
/* OUT parameters */
/* The offset that was used in the initial mmap() operation. */
uint64_t offset;
/* The number of pages mapped in the VM area that begins at @vaddr. */
uint32_t count;
uint32_t pad;
};
/*
* Sets the maximum number of grants that may mapped at once by this gntdev
* instance.
*
* N.B. This must be called before any other ioctl is performed on the device.
*/
#define IOCTL_GNTDEV_SET_MAX_GRANTS \
_IOC(_IOC_NONE, 'G', 3, sizeof(struct ioctl_gntdev_set_max_grants))
struct ioctl_gntdev_set_max_grants {
/* IN parameter */
/* The maximum number of grants that may be mapped at once. */
uint32_t count;
};
/*
* Sets up an unmap notification within the page, so that the other side can do
* cleanup if this side crashes. Required to implement cross-domain robust
* mutexes or close notification on communication channels.
*
* Each mapped page only supports one notification; multiple calls referring to
* the same page overwrite the previous notification. You must clear the
* notification prior to the IOCTL_GNTALLOC_DEALLOC_GREF if you do not want it
* to occur.
*/
#define IOCTL_GNTDEV_SET_UNMAP_NOTIFY \
_IOC(_IOC_NONE, 'G', 7, sizeof(struct ioctl_gntdev_unmap_notify))
struct ioctl_gntdev_unmap_notify {
/* IN parameters */
/* Offset in the file descriptor for a byte within the page (same as
* used in mmap). If using UNMAP_NOTIFY_CLEAR_BYTE, this is the byte to
* be cleared. Otherwise, it can be any byte in the page whose
* notification we are adjusting.
*/
uint64_t index;
/* Action(s) to take on unmap */
uint32_t action;
/* Event channel to notify */
uint32_t event_channel_port;
};
/* Clear (set to zero) the byte specified by index */
#define UNMAP_NOTIFY_CLEAR_BYTE 0x1
/* Send an interrupt on the indicated event channel */
#define UNMAP_NOTIFY_SEND_EVENT 0x2
#endif /* __LINUX_PUBLIC_GNTDEV_H__ */

41
include/xen/interface/xencomm.h
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/*
* 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
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@@ -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_ */