mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 18:21:39 +01:00
Ian Campbell
bf8f8fdeb4
These are already arch specific, so just use the appropriate interfaces (as determined by looking at the xc_memalign backend). Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com>
122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/******************************************************************************
|
|
*
|
|
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2.1 of the License.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Split from xc_netbsd.c
|
|
*/
|
|
|
|
#include "xc_private.h"
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <malloc.h>
|
|
#include <sys/mman.h>
|
|
|
|
int osdep_xencall_open(xencall_handle *xcall)
|
|
{
|
|
int flags, saved_errno;
|
|
int fd = open("/kern/xen/privcmd", O_RDWR);
|
|
|
|
if ( fd == -1 )
|
|
{
|
|
PERROR("Could not obtain handle on privileged command interface");
|
|
return -1;
|
|
}
|
|
|
|
/* Although we return the file handle as the 'xc handle' the API
|
|
does not specify / guarentee that this integer is in fact
|
|
a file handle. Thus we must take responsiblity to ensure
|
|
it doesn't propagate (ie leak) outside the process */
|
|
if ( (flags = fcntl(fd, F_GETFD)) < 0 )
|
|
{
|
|
PERROR("Could not get file handle flags");
|
|
goto error;
|
|
}
|
|
flags |= FD_CLOEXEC;
|
|
if ( fcntl(fd, F_SETFD, flags) < 0 )
|
|
{
|
|
PERROR("Could not set file handle flags");
|
|
goto error;
|
|
}
|
|
|
|
xcall->fd = fd;
|
|
return 0;
|
|
|
|
error:
|
|
saved_errno = errno;
|
|
close(fd);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
|
|
int osdep_xencall_close(xencall_handle *xcall)
|
|
{
|
|
int fd = xcall->fd;
|
|
return close(fd);
|
|
}
|
|
|
|
void *osdep_alloc_hypercall_buffer(xencall_handle *xcall, size_t npages)
|
|
{
|
|
size_t size = npages * XC_PAGE_SIZE;
|
|
void *p;
|
|
|
|
ret = posix_memalign(&p, XC_PAGE_SIZE, size);
|
|
if ( ret != 0 || !p )
|
|
return NULL;
|
|
|
|
if ( mlock(p, size) < 0 )
|
|
{
|
|
free(p);
|
|
return NULL;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void osdep_free_hypercall_buffer(xencall_handle *xcall, void *ptr,
|
|
size_t npages)
|
|
{
|
|
(void) munlock(ptr, npages * XC_PAGE_SIZE);
|
|
free(ptr);
|
|
}
|
|
|
|
int do_xen_hypercall(xencall_handle *xcall, privcmd_hypercall_t *hypercall)
|
|
{
|
|
int fd = xcall->fd;
|
|
int error = ioctl(fd, IOCTL_PRIVCMD_HYPERCALL, hypercall);
|
|
|
|
/*
|
|
* Since NetBSD ioctl can only return 0 on success or < 0 on
|
|
* error, if we want to return a value from ioctl we should
|
|
* do so by setting hypercall->retval, to mimic Linux ioctl
|
|
* implementation.
|
|
*/
|
|
if (error < 0)
|
|
return error;
|
|
else
|
|
return hypercall->retval;
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* mode: C
|
|
* c-file-style: "BSD"
|
|
* c-basic-offset: 4
|
|
* tab-width: 4
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*/
|