Home | History | Annotate | Line # | Download | only in x86 
      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
     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 *
     63 x86_curcpu()
     64 {
     65 
     66 	return curlwp->l_cpu;
     67 }
     68 
     69 struct lwp *
     70 x86_curlwp()
     71 {
     72 
     73 	return rump_curlwp_fast();
     74 }
     75 
     76 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 *
     89 rump_cpu_makeclockframe(void)
     90 {
     91 
     92 	return kmem_zalloc(sizeof(struct clockframe), KM_SLEEP);
     93 }
     94