[linux.git] / drivers / xen / features.c

/******************************************************************************
 * features.c
 *
 * Xen feature flags.
 *
 * Copyright (c) 2006, Ian Campbell, XenSource Inc.
 */
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/module.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);
	}
}
Commit	Line	Data
5ead97c8 JF	1	/******************************************************************************
	2	* features.c
	3	*
	4	* Xen feature flags.
	5	*
	6	* Copyright (c) 2006, Ian Campbell, XenSource Inc.
	7	*/
	8	#include <linux/types.h>
	9	#include <linux/cache.h>
	10	#include <linux/module.h>
ecbf29cd JF	11
	12	#include <asm/xen/hypercall.h>
	13
	14	#include <xen/interface/xen.h>
	15	#include <xen/interface/version.h>
5ead97c8 JF	16	#include <xen/features.h>
	17
	18	u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
	19	EXPORT_SYMBOL_GPL(xen_features);
	20
	21	void xen_setup_features(void)
	22	{
	23	struct xen_feature_info fi;
	24	int i, j;
	25
	26	for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
	27	fi.submap_idx = i;
	28	if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
	29	break;
	30	for (j = 0; j < 32; j++)
	31	xen_features[i * 32 + j] = !!(fi.submap & 1<<j);
	32	}
	33	}