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      1 /*	$NetBSD: msan.h,v 1.2 2020/09/09 16:29:59 maxv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2019-2020 Maxime Villard, m00nbsd.net
      5  * All rights reserved.
      6  *
      7  * This code is part of the KMSAN subsystem of the NetBSD kernel.
      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 OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26  * 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 #ifndef _SYS_MSAN_H_
     32 #define _SYS_MSAN_H_
     33 
     34 #ifdef _KERNEL_OPT
     35 #include "opt_kmsan.h"
     36 #endif
     37 
     38 #ifdef KMSAN
     39 #include <sys/types.h>
     40 #include <sys/bus.h>
     41 
     42 #define KMSAN_STATE_UNINIT	0xFF
     43 #define KMSAN_STATE_INITED	0x00
     44 
     45 #define KMSAN_TYPE_STACK	0
     46 #define KMSAN_TYPE_KMEM		1
     47 #define KMSAN_TYPE_MALLOC	2
     48 #define KMSAN_TYPE_POOL		3
     49 #define KMSAN_TYPE_UVM		4
     50 
     51 #define KMSAN_DMA_LINEAR	1
     52 #define KMSAN_DMA_MBUF		2
     53 #define KMSAN_DMA_UIO		3
     54 #define KMSAN_DMA_RAW		4
     55 
     56 #define __RET_ADDR		(uintptr_t)__builtin_return_address(0)
     57 
     58 void kmsan_init(void *);
     59 void kmsan_shadow_map(void *, size_t);
     60 
     61 void kmsan_lwp_alloc(struct lwp *);
     62 void kmsan_lwp_free(struct lwp *);
     63 
     64 void kmsan_dma_sync(bus_dmamap_t, bus_addr_t, bus_size_t, int);
     65 void kmsan_dma_load(bus_dmamap_t, void *, bus_size_t, int);
     66 
     67 void kmsan_orig(void *, size_t, int, uintptr_t);
     68 void kmsan_mark(void *, size_t, uint8_t);
     69 void kmsan_check_mbuf(void *);
     70 void kmsan_check_buf(void *);
     71 #else
     72 #define kmsan_init(u)			__nothing
     73 #define kmsan_shadow_map(a, s)		__nothing
     74 #define kmsan_lwp_alloc(l)		__nothing
     75 #define kmsan_lwp_free(l)		__nothing
     76 #define kmsan_dma_sync(m, a, s, o)	__nothing
     77 #define kmsan_dma_load(m, b, s, o)	__nothing
     78 #define kmsan_orig(p, l, c, a)		__nothing
     79 #define kmsan_mark(p, l, c)		__nothing
     80 #define kmsan_check_mbuf(m)		__nothing
     81 #define kmsan_check_buf(b)		__nothing
     82 #endif
     83 
     84 #endif /* !_SYS_MSAN_H_ */
     85