📄 features.c
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/****************************************************************************** * 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/hypervisor.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); }}
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