2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2012 NetApp, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/types.h>
37 #include <machine/vmm.h>
45 #include "spinup_ap.h"
48 spinup_ap_realmode(struct vcpu *newcpu, uint64_t rip)
53 uint32_t desc_limit, desc_access;
55 vector = rip >> PAGE_SHIFT;
58 * Update the %cs and %rip of the guest so that it starts
59 * executing real mode code at at 'vector << 12'.
61 error = vm_set_register(newcpu, VM_REG_GUEST_RIP, 0);
64 error = vm_get_desc(newcpu, VM_REG_GUEST_CS, &desc_base,
65 &desc_limit, &desc_access);
68 desc_base = vector << PAGE_SHIFT;
69 error = vm_set_desc(newcpu, VM_REG_GUEST_CS,
70 desc_base, desc_limit, desc_access);
73 cs = (vector << PAGE_SHIFT) >> 4;
74 error = vm_set_register(newcpu, VM_REG_GUEST_CS, cs);
79 spinup_ap(struct vcpu *newcpu, uint64_t rip)
83 error = vcpu_reset(newcpu);
86 spinup_ap_realmode(newcpu, rip);
88 vm_resume_cpu(newcpu);