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/******************************************************************************
* xc_cpupool.c
*
* API for manipulating and obtaining information on cpupools.
*
* 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);
}
int xc_cpupool_getinfo(xc_interface *xch,
uint32_t first_poolid,
uint32_t n_max,
xc_cpupoolinfo_t *info)
{
int err = 0;
int p;
uint32_t poolid = first_poolid;
uint8_t local[sizeof (info->cpumap)];
DECLARE_SYSCTL;
memset(info, 0, n_max * sizeof(xc_cpupoolinfo_t));
for (p = 0; p < n_max; p++)
{
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_cpus = sizeof(info->cpumap) * 8;
if ( (err = lock_pages(local, sizeof(local))) != 0 )
{
PERROR("Could not lock memory for Xen hypercall");
break;
}
err = do_sysctl_save(xch, &sysctl);
unlock_pages(local, sizeof (local));
if ( err < 0 )
break;
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;
bitmap_byte_to_64(&(info->cpumap), local, sizeof(local) * 8);
poolid = sysctl.u.cpupool_op.cpupool_id + 1;
info++;
}
if ( p == 0 )
return err;
return p;
}
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);
}
int xc_cpupool_freeinfo(xc_interface *xch,
uint64_t *cpumap)
{
int err;
uint8_t local[sizeof (*cpumap)];
DECLARE_SYSCTL;
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_cpus = sizeof(*cpumap) * 8;
if ( (err = lock_pages(local, sizeof(local))) != 0 )
{
PERROR("Could not lock memory for Xen hypercall");
return err;
}
err = do_sysctl_save(xch, &sysctl);
unlock_pages(local, sizeof (local));
if (err < 0)
return err;
bitmap_byte_to_64(cpumap, local, sizeof(local) * 8);
return 0;
}
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