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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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af711cda4f
ia64/xen also uses it too. Move it into common place so that ia64/xen can share the code. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
30 lines
695 B
C
30 lines
695 B
C
/******************************************************************************
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* features.c
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*
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* Xen feature flags.
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*
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* Copyright (c) 2006, Ian Campbell, XenSource Inc.
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*/
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#include <linux/types.h>
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#include <linux/cache.h>
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#include <linux/module.h>
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#include <asm/xen/hypervisor.h>
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#include <xen/features.h>
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u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly;
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EXPORT_SYMBOL_GPL(xen_features);
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void xen_setup_features(void)
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{
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struct xen_feature_info fi;
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int i, j;
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for (i = 0; i < XENFEAT_NR_SUBMAPS; i++) {
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fi.submap_idx = i;
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if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
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break;
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for (j = 0; j < 32; j++)
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xen_features[i * 32 + j] = !!(fi.submap & 1<<j);
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}
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}
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