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109 lines
2.6 KiB
109 lines
2.6 KiB
/* |
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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 <[email protected]> |
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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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