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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"
int xc_cpupool_create(int xc_handle,
uint32_t *ppoolid,
uint32_t sched_id)
{
int err;
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_CREATE;
domctl.u.cpupool_op.cpupool_id = (*ppoolid == 0) ?
XEN_DOMCTL_CPUPOOL_PAR_ANY : *ppoolid;
domctl.u.cpupool_op.sched_id = sched_id;
if ( (err = do_domctl_save(xc_handle, &domctl)) != 0 )
return err;
*ppoolid = domctl.u.cpupool_op.cpupool_id;
return 0;
}
int xc_cpupool_destroy(int xc_handle,
uint32_t poolid)
{
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_DESTROY;
domctl.u.cpupool_op.cpupool_id = poolid;
return do_domctl_save(xc_handle, &domctl);
}
int xc_cpupool_getinfo(int xc_handle,
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_DOMCTL;
memset(info, 0, n_max * sizeof(xc_cpupoolinfo_t));
for (p = 0; p < n_max; p++)
{
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_INFO;
domctl.u.cpupool_op.cpupool_id = poolid;
set_xen_guest_handle(domctl.u.cpupool_op.cpumap.bitmap, local);
domctl.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_domctl_save(xc_handle, &domctl);
unlock_pages(local, sizeof (local));
if ( err < 0 )
break;
info->cpupool_id = domctl.u.cpupool_op.cpupool_id;
info->sched_id = domctl.u.cpupool_op.sched_id;
info->n_dom = domctl.u.cpupool_op.n_dom;
bitmap_byte_to_64(&(info->cpumap), local, sizeof(local) * 8);
poolid = domctl.u.cpupool_op.cpupool_id + 1;
info++;
}
if ( p == 0 )
return err;
return p;
}
int xc_cpupool_addcpu(int xc_handle,
uint32_t poolid,
int cpu)
{
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_ADDCPU;
domctl.u.cpupool_op.cpupool_id = poolid;
domctl.u.cpupool_op.cpu = (cpu < 0) ? XEN_DOMCTL_CPUPOOL_PAR_ANY : cpu;
return do_domctl_save(xc_handle, &domctl);
}
int xc_cpupool_removecpu(int xc_handle,
uint32_t poolid,
int cpu)
{
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_RMCPU;
domctl.u.cpupool_op.cpupool_id = poolid;
domctl.u.cpupool_op.cpu = (cpu < 0) ? XEN_DOMCTL_CPUPOOL_PAR_ANY : cpu;
return do_domctl_save(xc_handle, &domctl);
}
int xc_cpupool_movedomain(int xc_handle,
uint32_t poolid,
uint32_t domid)
{
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_MOVEDOMAIN;
domctl.u.cpupool_op.cpupool_id = poolid;
domctl.u.cpupool_op.domid = domid;
return do_domctl_save(xc_handle, &domctl);
}
int xc_cpupool_freeinfo(int xc_handle,
uint64_t *cpumap)
{
int err;
uint8_t local[sizeof (*cpumap)];
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_cpupool_op;
domctl.u.cpupool_op.op = XEN_DOMCTL_CPUPOOL_OP_FREEINFO;
set_xen_guest_handle(domctl.u.cpupool_op.cpumap.bitmap, local);
domctl.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_domctl_save(xc_handle, &domctl);
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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