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/****************************************************************************
*
* File: xc_rt.c
* Author: Sisu Xi
* Meng Xu
*
* Description: XC Interface to the rtds scheduler
* Note: VCPU's parameter (period, budget) is in microsecond (us).
* All VCPUs of the same domain have same period and budget.
*
* 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/>.
*/
#include "xc_private.h"
int xc_sched_rtds_domain_set(xc_interface *xch,
uint32_t domid,
struct xen_domctl_sched_rtds *sdom)
{
int rc;
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_scheduler_op;
domctl.domain = domid;
domctl.u.scheduler_op.sched_id = XEN_SCHEDULER_RTDS;
domctl.u.scheduler_op.cmd = XEN_DOMCTL_SCHEDOP_putinfo;
domctl.u.scheduler_op.u.rtds.period = sdom->period;
domctl.u.scheduler_op.u.rtds.budget = sdom->budget;
rc = do_domctl(xch, &domctl);
return rc;
}
int xc_sched_rtds_domain_get(xc_interface *xch,
uint32_t domid,
struct xen_domctl_sched_rtds *sdom)
{
int rc;
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_scheduler_op;
domctl.domain = domid;
domctl.u.scheduler_op.sched_id = XEN_SCHEDULER_RTDS;
domctl.u.scheduler_op.cmd = XEN_DOMCTL_SCHEDOP_getinfo;
rc = do_domctl(xch, &domctl);
if ( rc == 0 )
*sdom = domctl.u.scheduler_op.u.rtds;
return rc;
}
int xc_sched_rtds_vcpu_set(xc_interface *xch,
uint32_t domid,
struct xen_domctl_schedparam_vcpu *vcpus,
uint32_t num_vcpus)
{
int rc = 0;
unsigned processed = 0;
DECLARE_DOMCTL;
DECLARE_HYPERCALL_BOUNCE(vcpus, sizeof(*vcpus) * num_vcpus,
XC_HYPERCALL_BUFFER_BOUNCE_IN);
if ( xc_hypercall_bounce_pre(xch, vcpus) )
return -1;
domctl.cmd = XEN_DOMCTL_scheduler_op;
domctl.domain = domid;
domctl.u.scheduler_op.sched_id = XEN_SCHEDULER_RTDS;
domctl.u.scheduler_op.cmd = XEN_DOMCTL_SCHEDOP_putvcpuinfo;
while ( processed < num_vcpus )
{
domctl.u.scheduler_op.u.v.nr_vcpus = num_vcpus - processed;
set_xen_guest_handle_offset(domctl.u.scheduler_op.u.v.vcpus, vcpus,
processed);
if ( (rc = do_domctl(xch, &domctl)) != 0 )
break;
processed += domctl.u.scheduler_op.u.v.nr_vcpus;
}
xc_hypercall_bounce_post(xch, vcpus);
return rc;
}
int xc_sched_rtds_vcpu_get(xc_interface *xch,
uint32_t domid,
struct xen_domctl_schedparam_vcpu *vcpus,
uint32_t num_vcpus)
{
int rc = 0;
unsigned processed = 0;
DECLARE_DOMCTL;
DECLARE_HYPERCALL_BOUNCE(vcpus, sizeof(*vcpus) * num_vcpus,
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
if ( xc_hypercall_bounce_pre(xch, vcpus) )
return -1;
domctl.cmd = XEN_DOMCTL_scheduler_op;
domctl.domain = domid;
domctl.u.scheduler_op.sched_id = XEN_SCHEDULER_RTDS;
domctl.u.scheduler_op.cmd = XEN_DOMCTL_SCHEDOP_getvcpuinfo;
while ( processed < num_vcpus )
{
domctl.u.scheduler_op.u.v.nr_vcpus = num_vcpus - processed;
set_xen_guest_handle_offset(domctl.u.scheduler_op.u.v.vcpus, vcpus,
processed);
if ( (rc = do_domctl(xch, &domctl)) != 0 )
break;
processed += domctl.u.scheduler_op.u.v.nr_vcpus;
}
xc_hypercall_bounce_post(xch, vcpus);
return rc;
}
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