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/******************************************************************************
* xc_cpupool.c
*
* API for manipulating and obtaining information on cpupools.
*
* 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
*
* Copyright (c) 2009, J Gross.
*/
#include <stdarg.h>
#include "xc_private.h"
static int do_sysctl_save(xc_interface *xch, struct xen_sysctl *sysctl)
{
int ret;
do {
ret = do_sysctl(xch, sysctl);
} while ( (ret < 0) && (errno == EAGAIN) );
return ret;
}
int xc_cpupool_create(xc_interface *xch,
uint32_t *ppoolid,
uint32_t sched_id)
{
int err;
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_CREATE;
sysctl.u.cpupool_op.cpupool_id = (*ppoolid == 0) ?
XEN_SYSCTL_CPUPOOL_PAR_ANY : *ppoolid;
sysctl.u.cpupool_op.sched_id = sched_id;
if ( (err = do_sysctl_save(xch, &sysctl)) != 0 )
return err;
*ppoolid = sysctl.u.cpupool_op.cpupool_id;
return 0;
}
int xc_cpupool_destroy(xc_interface *xch,
uint32_t poolid)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_DESTROY;
sysctl.u.cpupool_op.cpupool_id = poolid;
return do_sysctl_save(xch, &sysctl);
}
xc_cpupoolinfo_t *xc_cpupool_getinfo(xc_interface *xch,
uint32_t poolid)
{
int err = 0;
xc_cpupoolinfo_t *info = NULL;
int local_size;
DECLARE_SYSCTL;
DECLARE_HYPERCALL_BUFFER(uint8_t, local);
local_size = xc_get_cpumap_size(xch);
if (!local_size)
{
PERROR("Could not get number of cpus");
return NULL;
}
local = xc_hypercall_buffer_alloc(xch, local, local_size);
if ( local == NULL ) {
PERROR("Could not allocate locked memory for xc_cpupool_getinfo");
return NULL;
}
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_INFO;
sysctl.u.cpupool_op.cpupool_id = poolid;
set_xen_guest_handle(sysctl.u.cpupool_op.cpumap.bitmap, local);
sysctl.u.cpupool_op.cpumap.nr_bits = local_size * 8;
err = do_sysctl_save(xch, &sysctl);
if ( err < 0 )
goto out;
info = calloc(1, sizeof(xc_cpupoolinfo_t));
if ( !info )
goto out;
info->cpumap = xc_cpumap_alloc(xch);
if (!info->cpumap) {
free(info);
goto out;
}
info->cpupool_id = sysctl.u.cpupool_op.cpupool_id;
info->sched_id = sysctl.u.cpupool_op.sched_id;
info->n_dom = sysctl.u.cpupool_op.n_dom;
memcpy(info->cpumap, local, local_size);
out:
xc_hypercall_buffer_free(xch, local);
return info;
}
void xc_cpupool_infofree(xc_interface *xch,
xc_cpupoolinfo_t *info)
{
free(info->cpumap);
free(info);
}
int xc_cpupool_addcpu(xc_interface *xch,
uint32_t poolid,
int cpu)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_ADDCPU;
sysctl.u.cpupool_op.cpupool_id = poolid;
sysctl.u.cpupool_op.cpu = (cpu < 0) ? XEN_SYSCTL_CPUPOOL_PAR_ANY : cpu;
return do_sysctl_save(xch, &sysctl);
}
int xc_cpupool_removecpu(xc_interface *xch,
uint32_t poolid,
int cpu)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_RMCPU;
sysctl.u.cpupool_op.cpupool_id = poolid;
sysctl.u.cpupool_op.cpu = (cpu < 0) ? XEN_SYSCTL_CPUPOOL_PAR_ANY : cpu;
return do_sysctl_save(xch, &sysctl);
}
int xc_cpupool_movedomain(xc_interface *xch,
uint32_t poolid,
uint32_t domid)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_MOVEDOMAIN;
sysctl.u.cpupool_op.cpupool_id = poolid;
sysctl.u.cpupool_op.domid = domid;
return do_sysctl_save(xch, &sysctl);
}
xc_cpumap_t xc_cpupool_freeinfo(xc_interface *xch)
{
int err = -1;
xc_cpumap_t cpumap = NULL;
int mapsize;
DECLARE_SYSCTL;
DECLARE_HYPERCALL_BUFFER(uint8_t, local);
mapsize = xc_get_cpumap_size(xch);
if (mapsize == 0)
return NULL;
local = xc_hypercall_buffer_alloc(xch, local, mapsize);
if ( local == NULL ) {
PERROR("Could not allocate locked memory for xc_cpupool_freeinfo");
return NULL;
}
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_FREEINFO;
set_xen_guest_handle(sysctl.u.cpupool_op.cpumap.bitmap, local);
sysctl.u.cpupool_op.cpumap.nr_bits = mapsize * 8;
err = do_sysctl_save(xch, &sysctl);
if ( err < 0 )
goto out;
cpumap = xc_cpumap_alloc(xch);
if (cpumap == NULL)
goto out;
memcpy(cpumap, local, mapsize);
out:
xc_hypercall_buffer_free(xch, local);
return cpumap;
}
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