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Diffstat (limited to 'arch/x86/kernel/cpu/hypervisor.c')
| -rw-r--r-- | arch/x86/kernel/cpu/hypervisor.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c new file mode 100644 index 000000000..553bfbfc3 --- /dev/null +++ b/arch/x86/kernel/cpu/hypervisor.c @@ -0,0 +1,109 @@ +/* + * Common hypervisor code + * + * Copyright (C) 2008, VMware, Inc. + * Author : Alok N Kataria <akataria@vmware.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + */ + +#include <linux/init.h> +#include <linux/export.h> +#include <asm/processor.h> +#include <asm/hypervisor.h> + +static const __initconst struct hypervisor_x86 * const hypervisors[] = +{ +#ifdef CONFIG_XEN_PV + &x86_hyper_xen_pv, +#endif +#ifdef CONFIG_XEN_PVHVM + &x86_hyper_xen_hvm, +#endif + &x86_hyper_vmware, + &x86_hyper_ms_hyperv, +#ifdef CONFIG_KVM_GUEST + &x86_hyper_kvm, +#endif +#ifdef CONFIG_JAILHOUSE_GUEST + &x86_hyper_jailhouse, +#endif +#ifdef CONFIG_ACRN_GUEST + &x86_hyper_acrn, +#endif +}; + +enum x86_hypervisor_type x86_hyper_type; +EXPORT_SYMBOL(x86_hyper_type); + +bool __initdata nopv; +static __init int parse_nopv(char *arg) +{ + nopv = true; + return 0; +} +early_param("nopv", parse_nopv); + +static inline const struct hypervisor_x86 * __init +detect_hypervisor_vendor(void) +{ + const struct hypervisor_x86 *h = NULL, * const *p; + uint32_t pri, max_pri = 0; + + for (p = hypervisors; p < hypervisors + ARRAY_SIZE(hypervisors); p++) { + if (unlikely(nopv) && !(*p)->ignore_nopv) + continue; + + pri = (*p)->detect(); + if (pri > max_pri) { + max_pri = pri; + h = *p; + } + } + + if (h) + pr_info("Hypervisor detected: %s\n", h->name); + + return h; +} + +static void __init copy_array(const void *src, void *target, unsigned int size) +{ + unsigned int i, n = size / sizeof(void *); + const void * const *from = (const void * const *)src; + const void **to = (const void **)target; + + for (i = 0; i < n; i++) + if (from[i]) + to[i] = from[i]; +} + +void __init init_hypervisor_platform(void) +{ + const struct hypervisor_x86 *h; + + h = detect_hypervisor_vendor(); + + if (!h) + return; + + copy_array(&h->init, &x86_init.hyper, sizeof(h->init)); + copy_array(&h->runtime, &x86_platform.hyper, sizeof(h->runtime)); + + x86_hyper_type = h->type; + x86_init.hyper.init_platform(); +} |