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b9ae60907e6dbc686403e52a7e61a6f856401a1b
xen/tools/libxc/xc_minios.c
T
Olaf Hering 8a389b963f tools/libxc: assign positive values to errno 
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
2014-03-10 16:50:58 +00:00

551 lines
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C
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/******************************************************************************
*
* Copyright 2007-2008 Samuel Thibault <samuel.thibault@eu.citrix.com>.
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#undef NDEBUG
#include "xen-external/bsd-sys-queue.h"
#include <mini-os/types.h>
#include <mini-os/os.h>
#include <mini-os/mm.h>
#include <mini-os/lib.h>
#include <mini-os/gntmap.h>
#include <mini-os/events.h>
#include <mini-os/wait.h>
#include <sys/mman.h>
#include <xen/memory.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <assert.h>
#include <stdint.h>
#include <inttypes.h>
#include <malloc.h>
#include "xc_private.h"
void minios_interface_close_fd(int fd);
void minios_evtchn_close_fd(int fd);
void minios_gnttab_close_fd(int fd);
extern void minios_interface_close_fd(int fd);
extern void minios_evtchn_close_fd(int fd);
extern struct wait_queue_head event_queue;
static xc_osdep_handle minios_privcmd_open(xc_interface *xch)
{
int fd = alloc_fd(FTYPE_XC);
if ( fd == -1)
return XC_OSDEP_OPEN_ERROR;
return (xc_osdep_handle)fd;
}
static int minios_privcmd_close(xc_interface *xch, xc_osdep_handle h)
{
int fd = (int)h;
return close(fd);
}
void minios_interface_close_fd(int fd)
{
files[fd].type = FTYPE_NONE;
}
static void *minios_privcmd_alloc_hypercall_buffer(xc_interface *xch, xc_osdep_handle h, int npages)
{
return xc_memalign(xch, PAGE_SIZE, npages * PAGE_SIZE);
}
static void minios_privcmd_free_hypercall_buffer(xc_interface *xch, xc_osdep_handle h, void *ptr, int npages)
{
free(ptr);
}
static int minios_privcmd_hypercall(xc_interface *xch, xc_osdep_handle h, privcmd_hypercall_t *hypercall)
{
multicall_entry_t call;
int i, ret;
call.op = hypercall->op;
for (i = 0; i < sizeof(hypercall->arg) / sizeof(*hypercall->arg); i++)
call.args[i] = hypercall->arg[i];
ret = HYPERVISOR_multicall(&call, 1);
if (ret < 0) {
errno = -ret;
return -1;
}
if ((long) call.result < 0) {
errno = - (long) call.result;
return -1;
}
return call.result;
}
static void *minios_privcmd_map_foreign_bulk(xc_interface *xch, xc_osdep_handle h,
uint32_t dom, int prot,
const xen_pfn_t *arr, int *err, unsigned int num)
{
unsigned long pt_prot = 0;
if (prot & PROT_READ)
pt_prot = L1_PROT_RO;
if (prot & PROT_WRITE)
pt_prot = L1_PROT;
return map_frames_ex(arr, num, 1, 0, 1, dom, err, pt_prot);
}
static void *minios_privcmd_map_foreign_batch(xc_interface *xch, xc_osdep_handle h,
uint32_t dom, int prot,
xen_pfn_t *arr, int num)
{
unsigned long pt_prot = 0;
int err[num];
int i;
unsigned long addr;
if (prot & PROT_READ)
pt_prot = L1_PROT_RO;
if (prot & PROT_WRITE)
pt_prot = L1_PROT;
addr = (unsigned long) map_frames_ex(arr, num, 1, 0, 1, dom, err, pt_prot);
for (i = 0; i < num; i++) {
if (err[i])
arr[i] |= 0xF0000000;
}
return (void *) addr;
}
static void *minios_privcmd_map_foreign_range(xc_interface *xch, xc_osdep_handle h,
uint32_t dom,
int size, int prot,
unsigned long mfn)
{
unsigned long pt_prot = 0;
if (prot & PROT_READ)
pt_prot = L1_PROT_RO;
if (prot & PROT_WRITE)
pt_prot = L1_PROT;
assert(!(size % getpagesize()));
return map_frames_ex(&mfn, size / getpagesize(), 0, 1, 1, dom, NULL, pt_prot);
}
static void *minios_privcmd_map_foreign_ranges(xc_interface *xch, xc_osdep_handle h,
uint32_t dom,
size_t size, int prot, size_t chunksize,
privcmd_mmap_entry_t entries[], int nentries)
{
unsigned long *mfns;
int i, j, n;
unsigned long pt_prot = 0;
void *ret;
if (prot & PROT_READ)
pt_prot = L1_PROT_RO;
if (prot & PROT_WRITE)
pt_prot = L1_PROT;
mfns = malloc((size / XC_PAGE_SIZE) * sizeof(*mfns));
n = 0;
for (i = 0; i < nentries; i++)
for (j = 0; j < chunksize / XC_PAGE_SIZE; j++)
mfns[n++] = entries[i].mfn + j;
ret = map_frames_ex(mfns, n, 1, 0, 1, dom, NULL, pt_prot);
free(mfns);
return ret;
}
static struct xc_osdep_ops minios_privcmd_ops = {
.open = &minios_privcmd_open,
.close = &minios_privcmd_close,
.u.privcmd = {
.alloc_hypercall_buffer = &minios_privcmd_alloc_hypercall_buffer,
.free_hypercall_buffer = &minios_privcmd_free_hypercall_buffer,
.hypercall = &minios_privcmd_hypercall,
.map_foreign_batch = &minios_privcmd_map_foreign_batch,
.map_foreign_bulk = &minios_privcmd_map_foreign_bulk,
.map_foreign_range = &minios_privcmd_map_foreign_range,
.map_foreign_ranges = &minios_privcmd_map_foreign_ranges,
},
};
/* XXX Note: This is not threadsafe */
static struct evtchn_port_info* port_alloc(int fd) {
struct evtchn_port_info *port_info;
port_info = malloc(sizeof(struct evtchn_port_info));
if (port_info == NULL)
return NULL;
port_info->pending = 0;
port_info->port = -1;
port_info->bound = 0;
LIST_INSERT_HEAD(&files[fd].evtchn.ports, port_info, list);
return port_info;
}
static void port_dealloc(struct evtchn_port_info *port_info) {
if (port_info->bound)
unbind_evtchn(port_info->port);
LIST_REMOVE(port_info, list);
free(port_info);
}
static xc_osdep_handle minios_evtchn_open(xc_evtchn *xce)
{
int fd = alloc_fd(FTYPE_EVTCHN);
if ( fd == -1 )
return XC_OSDEP_OPEN_ERROR;
LIST_INIT(&files[fd].evtchn.ports);
printf("evtchn_open() -> %d\n", fd);
return (xc_osdep_handle)fd;
}
static int minios_evtchn_close(xc_evtchn *xce, xc_osdep_handle h)
{
int fd = (int)h;
return close(fd);
}
void minios_evtchn_close_fd(int fd)
{
struct evtchn_port_info *port_info, *tmp;
LIST_FOREACH_SAFE(port_info, &files[fd].evtchn.ports, list, tmp)
port_dealloc(port_info);
files[fd].type = FTYPE_NONE;
}
static int minios_evtchn_fd(xc_evtchn *xce, xc_osdep_handle h)
{
return (int)h;
}
static int minios_evtchn_notify(xc_evtchn *xce, xc_osdep_handle h, evtchn_port_t port)
{
int ret;
ret = notify_remote_via_evtchn(port);
if (ret < 0) {
errno = -ret;
ret = -1;
}
return ret;
}
static void evtchn_handler(evtchn_port_t port, struct pt_regs *regs, void *data)
{
int fd = (int)(intptr_t)data;
struct evtchn_port_info *port_info;
assert(files[fd].type == FTYPE_EVTCHN);
mask_evtchn(port);
LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) {
if (port_info->port == port)
goto found;
}
printk("Unknown port for handle %d\n", fd);
return;
found:
port_info->pending = 1;
files[fd].read = 1;
wake_up(&event_queue);
}
static evtchn_port_or_error_t minios_evtchn_bind_unbound_port(xc_evtchn *xce, xc_osdep_handle h, int domid)
{
int fd = (int)h;
struct evtchn_port_info *port_info;
int ret;
evtchn_port_t port;
assert(get_current() == main_thread);
port_info = port_alloc(fd);
if (port_info == NULL)
return -1;
printf("xc_evtchn_bind_unbound_port(%d)", domid);
ret = evtchn_alloc_unbound(domid, evtchn_handler, (void*)(intptr_t)fd, &port);
printf(" = %d\n", ret);
if (ret < 0) {
port_dealloc(port_info);
errno = -ret;
return -1;
}
port_info->bound = 1;
port_info->port = port;
unmask_evtchn(port);
return port;
}
static evtchn_port_or_error_t minios_evtchn_bind_interdomain(xc_evtchn *xce, xc_osdep_handle h, int domid,
evtchn_port_t remote_port)
{
int fd = (int)h;
struct evtchn_port_info *port_info;
evtchn_port_t local_port;
int ret;
assert(get_current() == main_thread);
port_info = port_alloc(fd);
if (port_info == NULL)
return -1;
printf("xc_evtchn_bind_interdomain(%d, %"PRId32")", domid, remote_port);
ret = evtchn_bind_interdomain(domid, remote_port, evtchn_handler, (void*)(intptr_t)fd, &local_port);
printf(" = %d\n", ret);
if (ret < 0) {
port_dealloc(port_info);
errno = -ret;
return -1;
}
port_info->bound = 1;
port_info->port = local_port;
unmask_evtchn(local_port);
return local_port;
}
static int minios_evtchn_unbind(xc_evtchn *xce, xc_osdep_handle h, evtchn_port_t port)
{
int fd = (int)h;
struct evtchn_port_info *port_info;
LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) {
if (port_info->port == port) {
port_dealloc(port_info);
return 0;
}
}
printf("Warning: couldn't find port %"PRId32" for xc handle %x\n", port, fd);
errno = EINVAL;
return -1;
}
static evtchn_port_or_error_t minios_evtchn_bind_virq(xc_evtchn *xce, xc_osdep_handle h, unsigned int virq)
{
int fd = (int)h;
struct evtchn_port_info *port_info;
evtchn_port_t port;
assert(get_current() == main_thread);
port_info = port_alloc(fd);
if (port_info == NULL)
return -1;
printf("xc_evtchn_bind_virq(%d)", virq);
port = bind_virq(virq, evtchn_handler, (void*)(intptr_t)fd);
if (port < 0) {
port_dealloc(port_info);
errno = -port;
return -1;
}
port_info->bound = 1;
port_info->port = port;
unmask_evtchn(port);
return port;
}
static evtchn_port_or_error_t minios_evtchn_pending(xc_evtchn *xce, xc_osdep_handle h)
{
int fd = (int)h;
struct evtchn_port_info *port_info;
unsigned long flags;
evtchn_port_t ret = -1;
local_irq_save(flags);
files[fd].read = 0;
LIST_FOREACH(port_info, &files[fd].evtchn.ports, list) {
if (port_info->port != -1 && port_info->pending) {
if (ret == -1) {
ret = port_info->port;
port_info->pending = 0;
} else {
files[fd].read = 1;
break;
}
}
}
local_irq_restore(flags);
return ret;
}
static int minios_evtchn_unmask(xc_evtchn *xce, xc_osdep_handle h, evtchn_port_t port)
{
unmask_evtchn(port);
return 0;
}
static struct xc_osdep_ops minios_evtchn_ops = {
.open = &minios_evtchn_open,
.close = &minios_evtchn_close,
.u.evtchn = {
.fd = &minios_evtchn_fd,
.notify = &minios_evtchn_notify,
.bind_unbound_port = &minios_evtchn_bind_unbound_port,
.bind_interdomain = &minios_evtchn_bind_interdomain,
.bind_virq = &minios_evtchn_bind_virq,
.unbind = &minios_evtchn_unbind,
.pending = &minios_evtchn_pending,
.unmask = &minios_evtchn_unmask,
},
};
/* Optionally flush file to disk and discard page cache */
void discard_file_cache(xc_interface *xch, int fd, int flush)
{
if (flush)
fsync(fd);
}
void *xc_memalign(xc_interface *xch, size_t alignment, size_t size)
{
return memalign(alignment, size);
}
static xc_osdep_handle minios_gnttab_open(xc_gnttab *xcg)
{
int fd = alloc_fd(FTYPE_GNTMAP);
if ( fd == -1 )
return XC_OSDEP_OPEN_ERROR;
gntmap_init(&files[fd].gntmap);
return (xc_osdep_handle)fd;
}
static int minios_gnttab_close(xc_gnttab *xcg, xc_osdep_handle h)
{
int fd = (int)h;
return close(fd);
}
void minios_gnttab_close_fd(int fd)
{
gntmap_fini(&files[fd].gntmap);
files[fd].type = FTYPE_NONE;
}
static void *minios_gnttab_grant_map(xc_gnttab *xcg, xc_osdep_handle h,
uint32_t count, int flags, int prot,
uint32_t *domids, uint32_t *refs,
uint32_t notify_offset,
evtchn_port_t notify_port)
{
int fd = (int)h;
int stride = 1;
if (flags & XC_GRANT_MAP_SINGLE_DOMAIN)
stride = 0;
if (notify_offset != -1 || notify_port != -1) {
errno = ENOSYS;
return NULL;
}
return gntmap_map_grant_refs(&files[fd].gntmap,
count, domids, stride,
refs, prot & PROT_WRITE);
}
static int minios_gnttab_munmap(xc_gnttab *xcg, xc_osdep_handle h,
void *start_address,
uint32_t count)
{
int fd = (int)h;
int ret;
ret = gntmap_munmap(&files[fd].gntmap,
(unsigned long) start_address,
count);
if (ret < 0) {
errno = -ret;
return -1;
}
return ret;
}
static int minios_gnttab_set_max_grants(xc_gnttab *xcg, xc_osdep_handle h,
uint32_t count)
{
int fd = (int)h;
int ret;
ret = gntmap_set_max_grants(&files[fd].gntmap,
count);
if (ret < 0) {
errno = -ret;
return -1;
}
return ret;
}
static struct xc_osdep_ops minios_gnttab_ops = {
.open = &minios_gnttab_open,
.close = &minios_gnttab_close,
.u.gnttab = {
.grant_map = &minios_gnttab_grant_map,
.munmap = &minios_gnttab_munmap,
.set_max_grants = &minios_gnttab_set_max_grants,
},
};
static struct xc_osdep_ops *minios_osdep_init(xc_interface *xch, enum xc_osdep_type type)
{
switch ( type )
{
case XC_OSDEP_PRIVCMD:
return &minios_privcmd_ops;
case XC_OSDEP_EVTCHN:
return &minios_evtchn_ops;
case XC_OSDEP_GNTTAB:
return &minios_gnttab_ops;
default:
return NULL;
}
}
xc_osdep_info_t xc_osdep_info = {
.name = "Minios Native OS interface",
.init = &minios_osdep_init,
.fake = 0,
};
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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