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/******************************************************************************
* cpu_idle.c -- adapt x86/acpi/cpu_idle.c to compat guest.
*
* Copyright (C) 2007, 2008 Intel Corporation
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#define __XEN_TOOLS__ /* for using get_xen_guest_handle macro */
#include <xen/config.h>
#include <xen/types.h>
#include <xen/xmalloc.h>
#include <xen/guest_access.h>
#include <xen/pmstat.h>
#include <compat/platform.h>
CHECK_processor_csd;
DEFINE_XEN_GUEST_HANDLE(compat_processor_csd_t);
DEFINE_XEN_GUEST_HANDLE(compat_processor_cx_t);
void *xlat_malloc(unsigned long *xlat_page_current, size_t size)
{
void *ret;
/* normalize size to be 64 * n */
size = (size + 0x3fUL) & ~0x3fUL;
if ( unlikely(size > xlat_page_left_size(*xlat_page_current)) )
return NULL;
ret = (void *) *xlat_page_current;
*xlat_page_current += size;
return ret;
}
static int copy_from_compat_state(xen_processor_cx_t *xen_state,
compat_processor_cx_t *state)
{
#define XLAT_processor_cx_HNDL_dp(_d_, _s_) do { \
XEN_GUEST_HANDLE(compat_processor_csd_t) dps; \
XEN_GUEST_HANDLE_PARAM(xen_processor_csd_t) dps_param; \
if ( unlikely(!compat_handle_okay((_s_)->dp, (_s_)->dpcnt)) ) \
return -EFAULT; \
guest_from_compat_handle(dps, (_s_)->dp); \
dps_param = guest_handle_cast(dps, xen_processor_csd_t); \
(_d_)->dp = guest_handle_from_param(dps_param, xen_processor_csd_t); \
} while (0)
XLAT_processor_cx(xen_state, state);
#undef XLAT_processor_cx_HNDL_dp
return 0;
}
long compat_set_cx_pminfo(uint32_t cpu, struct compat_processor_power *power)
{
struct xen_processor_power *xen_power;
unsigned long xlat_page_current;
xlat_malloc_init(xlat_page_current);
xen_power = xlat_malloc_array(xlat_page_current,
struct xen_processor_power, 1);
if ( unlikely(xen_power == NULL) )
return -EFAULT;
#define XLAT_processor_power_HNDL_states(_d_, _s_) do { \
xen_processor_cx_t *xen_states = NULL; \
\
if ( likely((_s_)->count > 0) ) \
{ \
XEN_GUEST_HANDLE(compat_processor_cx_t) states; \
compat_processor_cx_t state; \
int i; \
\
xen_states = xlat_malloc_array(xlat_page_current, \
xen_processor_cx_t, (_s_)->count); \
if ( unlikely(xen_states == NULL) ) \
return -EFAULT; \
\
if ( unlikely(!compat_handle_okay((_s_)->states, (_s_)->count)) ) \
return -EFAULT; \
guest_from_compat_handle(states, (_s_)->states); \
\
for ( i = 0; i < _s_->count; i++ ) \
{ \
if ( unlikely(copy_from_guest_offset(&state, states, i, 1)) ) \
return -EFAULT; \
if ( unlikely(copy_from_compat_state(&xen_states[i], &state)) ) \
return -EFAULT; \
} \
} \
\
set_xen_guest_handle((_d_)->states, xen_states); \
} while (0)
XLAT_processor_power(xen_power, power);
#undef XLAT_processor_power_HNDL_states
return set_cx_pminfo(cpu, xen_power);
}
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