34 lines
762 B
C
34 lines
762 B
C
|
/******************************************************************************
|
||
|
|
* features.c
|
||
|
|
*
|
||
|
|
* Xen feature flags.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2006, Ian Campbell, XenSource Inc.
|
||
|
|
*/
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/cache.h>
|
||
|
|
#include <linux/export.h>
|
||
|
|
|
||
|
|
#include <asm/xen/hypercall.h>
|
||
|
|
|
||
|
|
#include <xen/interface/xen.h>
|
||
|
|
#include <xen/interface/version.h>
|
||
|
|
#include <xen/features.h>
|
||
|
|
|
||
|
|
u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
|
||
|
|
EXPORT_SYMBOL_GPL(xen_features);
|
||
|
|
|
||
|
|
void xen_setup_features(void)
|
||
|
|
{
|
||
|
|
struct xen_feature_info fi;
|
||
|
|
int i, j;
|
||
|
|
|
||
|
|
for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
|
||
|
|
fi.submap_idx = i;
|
||
|
|
if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
|
||
|
|
break;
|
||
|
|
for (j = 0; j < 32; j++)
|
||
|
|
xen_features[i * 32 + j] = !!(fi.submap & 1<<j);
|
||
|
|
}
|
||
|
|
}
|