2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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
10 * 1. Redistributions of source code must retain the above copyright
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14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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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 vmctx *ctx, int newcpu, uint64_t *rip)
53 uint32_t desc_limit, desc_access;
55 vector = *rip >> PAGE_SHIFT;
59 * Update the %cs and %rip of the guest so that it starts
60 * executing real mode code at at 'vector << 12'.
62 error = vm_set_register(ctx, newcpu, VM_REG_GUEST_RIP, *rip);
65 error = vm_get_desc(ctx, newcpu, VM_REG_GUEST_CS, &desc_base,
66 &desc_limit, &desc_access);
69 desc_base = vector << PAGE_SHIFT;
70 error = vm_set_desc(ctx, newcpu, VM_REG_GUEST_CS,
71 desc_base, desc_limit, desc_access);
74 cs = (vector << PAGE_SHIFT) >> 4;
75 error = vm_set_register(ctx, newcpu, VM_REG_GUEST_CS, cs);
80 spinup_ap(struct vmctx *ctx, int vcpu, int newcpu, uint64_t rip)
85 assert(newcpu < guest_ncpus);
87 error = vcpu_reset(ctx, newcpu);
90 fbsdrun_set_capabilities(ctx, newcpu);
93 * Enable the 'unrestricted guest' mode for 'newcpu'.
95 * Set up the processor state in power-on 16-bit mode, with the CS:IP
96 * init'd to the specified low-mem 4K page.
98 error = vm_set_capability(ctx, newcpu, VM_CAP_UNRESTRICTED_GUEST, 1);
101 spinup_ap_realmode(ctx, newcpu, &rip);
103 fbsdrun_addcpu(ctx, vcpu, newcpu, rip);