1 /* $NetBSD: rump_x86_cpu.c,v 1.5 2022/08/21 10:18:11 riastradh Exp $ */
2
3 /*
4 * Copyright (c) 2008 Antti Kantee. All Rights Reserved.
5 *
6 * Development of this software was supported by the
7 * Finnish Cultural Foundation.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __KERNEL_RCSID(0, "$NetBSD: rump_x86_cpu.c,v 1.5 2022/08/21 10:18:11 riastradh Exp $");
33
34 #include <sys/param.h>
35 #include <sys/kmem.h>
36
37 #include <machine/cpu.h>
38
39 #include <x86/cpufunc.h>
40
41 #include <rump-sys/kern.h>
42
43 #include "rump_curlwp.h"
44
45 struct cpu_info *cpu_info_list;
46
47 void
rump_cpu_attach(struct cpu_info * ci)48 rump_cpu_attach(struct cpu_info *ci)
49 {
50
51 if (cpu_info_list == NULL)
52 ci->ci_flags |= CPUF_PRIMARY;
53
54 /* XXX: wrong order, but ... */
55 ci->ci_next = cpu_info_list;
56 cpu_info_list = ci;
57
58 kcpuset_set(kcpuset_attached, cpu_index(ci));
59 kcpuset_set(kcpuset_running, cpu_index(ci));
60 }
61
62 struct cpu_info *
x86_curcpu()63 x86_curcpu()
64 {
65
66 return curlwp->l_cpu;
67 }
68
69 struct lwp *
x86_curlwp()70 x86_curlwp()
71 {
72
73 return rump_curlwp_fast();
74 }
75
76 void
wbinvd(void)77 wbinvd(void)
78 {
79
80 /*
81 * Used by kobj_machdep().
82 *
83 * But, we Best not execute this since we're not Ring0 *.
84 * Honestly, I don't know why it's required even in the kernel.
85 */
86 }
87
88 struct clockframe *
rump_cpu_makeclockframe(void)89 rump_cpu_makeclockframe(void)
90 {
91
92 return kmem_zalloc(sizeof(struct clockframe), KM_SLEEP);
93 }
94