110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
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/*
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* Common hypervisor code
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*
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* Copyright (C) 2008, VMware, Inc.
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* Author : Alok N Kataria <akataria@vmware.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <asm/processor.h>
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#include <asm/hypervisor.h>
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static const __initconst struct hypervisor_x86 * const hypervisors[] =
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{
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#ifdef CONFIG_XEN_PV
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&x86_hyper_xen_pv,
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#endif
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#ifdef CONFIG_XEN_PVHVM
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&x86_hyper_xen_hvm,
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#endif
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&x86_hyper_vmware,
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&x86_hyper_ms_hyperv,
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#ifdef CONFIG_KVM_GUEST
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&x86_hyper_kvm,
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#endif
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#ifdef CONFIG_JAILHOUSE_GUEST
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&x86_hyper_jailhouse,
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#endif
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#ifdef CONFIG_ACRN_GUEST
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&x86_hyper_acrn,
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#endif
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};
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enum x86_hypervisor_type x86_hyper_type;
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EXPORT_SYMBOL(x86_hyper_type);
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bool __initdata nopv;
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static __init int parse_nopv(char *arg)
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{
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nopv = true;
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return 0;
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}
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early_param("nopv", parse_nopv);
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static inline const struct hypervisor_x86 * __init
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detect_hypervisor_vendor(void)
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{
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const struct hypervisor_x86 *h = NULL, * const *p;
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uint32_t pri, max_pri = 0;
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for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) {
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if (unlikely(nopv) && !(*p)->ignore_nopv)
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continue;
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pri = (*p)->detect();
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if (pri > max_pri) {
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max_pri = pri;
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h = *p;
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}
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}
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if (h)
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pr_info("Hypervisor detected: %s\n", h->name);
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return h;
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}
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static void __init copy_array(const void *src, void *target, unsigned int size)
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{
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unsigned int i, n = size / sizeof(void *);
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const void * const *from = (const void * const *)src;
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const void **to = (const void **)target;
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for (i = 0; i < n; i++)
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if (from[i])
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to[i] = from[i];
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}
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void __init init_hypervisor_platform(void)
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{
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const struct hypervisor_x86 *h;
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h = detect_hypervisor_vendor();
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if (!h)
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return;
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copy_array(&h->init, &x86_init.hyper, sizeof(h->init));
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copy_array(&h->runtime, &x86_platform.hyper, sizeof(h->runtime));
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x86_hyper_type = h->type;
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x86_init.hyper.init_platform();
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}
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