// SPDX-License-Identifier: GPL-2.0-only /****************************************************************************** * 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); } }