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/******************************************************************************
* xc_pm.c - Libxc API for Xen Power Management (Px/Cx/Tx, etc.) statistic
*
* Copyright (c) 2008, Liu Jinsong <jinsong.liu@intel.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
#include "xc_private.h"
int xc_pm_get_max_px(int xc_handle, int cpuid, int *max_px)
{
DECLARE_SYSCTL;
int ret;
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_get_max_px;
sysctl.u.get_pmstat.cpuid = cpuid;
ret = xc_sysctl(xc_handle, &sysctl);
if ( ret )
return ret;
*max_px = sysctl.u.get_pmstat.u.getpx.total;
return ret;
}
int xc_pm_get_pxstat(int xc_handle, int cpuid, struct xc_px_stat *pxpt)
{
DECLARE_SYSCTL;
int max_px, ret;
if ( !pxpt || !(pxpt->trans_pt) || !(pxpt->pt) )
return -EINVAL;
if ( (ret = xc_pm_get_max_px(xc_handle, cpuid, &max_px)) != 0)
return ret;
if ( (ret = lock_pages(pxpt->trans_pt,
max_px * max_px * sizeof(uint64_t))) != 0 )
return ret;
if ( (ret = lock_pages(pxpt->pt,
max_px * sizeof(struct xc_px_val))) != 0 )
{
unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
return ret;
}
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_get_pxstat;
sysctl.u.get_pmstat.cpuid = cpuid;
set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.trans_pt, pxpt->trans_pt);
set_xen_guest_handle(sysctl.u.get_pmstat.u.getpx.pt,
(pm_px_val_t *)pxpt->pt);
ret = xc_sysctl(xc_handle, &sysctl);
if ( ret )
{
unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
unlock_pages(pxpt->pt, max_px * sizeof(struct xc_px_val));
return ret;
}
pxpt->total = sysctl.u.get_pmstat.u.getpx.total;
pxpt->usable = sysctl.u.get_pmstat.u.getpx.usable;
pxpt->last = sysctl.u.get_pmstat.u.getpx.last;
pxpt->cur = sysctl.u.get_pmstat.u.getpx.cur;
unlock_pages(pxpt->trans_pt, max_px * max_px * sizeof(uint64_t));
unlock_pages(pxpt->pt, max_px * sizeof(struct xc_px_val));
return ret;
}
int xc_pm_reset_pxstat(int xc_handle, int cpuid)
{
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_get_pmstat;
sysctl.u.get_pmstat.type = PMSTAT_reset_pxstat;
sysctl.u.get_pmstat.cpuid = cpuid;
return xc_sysctl(xc_handle, &sysctl);
}
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