]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - lib/libkvm/kvm_minidump_powerpc64.c
MFV: r360512
[FreeBSD/FreeBSD.git] / lib / libkvm / kvm_minidump_powerpc64.c
1 /*-
2  * Copyright (c) 2006 Peter Wemm
3  * Copyright (c) 2019 Leandro Lupori
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * From: FreeBSD: src/lib/libkvm/kvm_minidump_riscv.c
27  */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include <sys/param.h>
33
34 #include <kvm.h>
35
36 #include <limits.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include "../../sys/powerpc/include/minidump.h"
42 #include "kvm_private.h"
43 #include "kvm_powerpc64.h"
44
45
46 static int
47 _powerpc64_minidump_probe(kvm_t *kd)
48 {
49         return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_PPC64) &&
50             _kvm_is_minidump(kd));
51 }
52
53 static void
54 _powerpc64_minidump_freevtop(kvm_t *kd)
55 {
56         struct vmstate *vm = kd->vmst;
57
58         if (vm == NULL)
59                 return;
60         if (PPC64_MMU_OPS(kd))
61                 PPC64_MMU_OP(kd, cleanup);
62         free(vm);
63         kd->vmst = NULL;
64 }
65
66 static int
67 _powerpc64_minidump_initvtop(kvm_t *kd)
68 {
69         struct vmstate *vmst;
70         struct minidumphdr *hdr;
71         off_t bitmap_off, pmap_off, sparse_off;
72         const char *mmu_name;
73
74         /* Alloc VM */
75         vmst = _kvm_malloc(kd, sizeof(*vmst));
76         if (vmst == NULL) {
77                 _kvm_err(kd, kd->program, "cannot allocate vm");
78                 return (-1);
79         }
80         hdr = &vmst->hdr;
81         kd->vmst = vmst;
82         PPC64_MMU_OPS(kd) = NULL;
83         /* Read minidump header */
84         if (pread(kd->pmfd, hdr, sizeof(*hdr), 0) != sizeof(*hdr)) {
85                 _kvm_err(kd, kd->program, "cannot read minidump header");
86                 goto failed;
87         }
88         /* Check magic */
89         if (strncmp(MINIDUMP_MAGIC, hdr->magic, sizeof(hdr->magic)) != 0) {
90                 _kvm_err(kd, kd->program, "not a minidump for this platform");
91                 goto failed;
92         }
93         /* Check version */
94         hdr->version = be32toh(hdr->version);
95         if (hdr->version != MINIDUMP_VERSION) {
96                 _kvm_err(kd, kd->program, "wrong minidump version. "
97                     "Expected %d got %d", MINIDUMP_VERSION, hdr->version);
98                 goto failed;
99         }
100         /* Convert header fields to host endian */
101         hdr->msgbufsize         = be32toh(hdr->msgbufsize);
102         hdr->bitmapsize         = be32toh(hdr->bitmapsize);
103         hdr->pmapsize           = be32toh(hdr->pmapsize);
104         hdr->kernbase           = be64toh(hdr->kernbase);
105         hdr->kernend            = be64toh(hdr->kernend);
106         hdr->dmapbase           = be64toh(hdr->dmapbase);
107         hdr->dmapend            = be64toh(hdr->dmapend);
108         hdr->hw_direct_map      = be32toh(hdr->hw_direct_map);
109         hdr->startkernel        = be64toh(hdr->startkernel);
110         hdr->endkernel          = be64toh(hdr->endkernel);
111
112         vmst->kimg_start = PPC64_KERNBASE;
113         vmst->kimg_end = PPC64_KERNBASE + hdr->endkernel - hdr->startkernel;
114
115         /* dump header */
116         dprintf("%s: mmu_name=%s,\n\t"
117             "msgbufsize=0x%jx, bitmapsize=0x%jx, pmapsize=0x%jx, "
118             "kernbase=0x%jx, kernend=0x%jx,\n\t"
119             "dmapbase=0x%jx, dmapend=0x%jx, hw_direct_map=%d, "
120             "startkernel=0x%jx, endkernel=0x%jx\n\t"
121             "kimg_start=0x%jx, kimg_end=0x%jx\n",
122             __func__, hdr->mmu_name,
123             (uintmax_t)hdr->msgbufsize,
124             (uintmax_t)hdr->bitmapsize, (uintmax_t)hdr->pmapsize,
125             (uintmax_t)hdr->kernbase, (uintmax_t)hdr->kernend,
126             (uintmax_t)hdr->dmapbase, (uintmax_t)hdr->dmapend,
127             hdr->hw_direct_map, hdr->startkernel, hdr->endkernel,
128             (uintmax_t)vmst->kimg_start, (uintmax_t)vmst->kimg_end);
129
130         /* Detect and initialize MMU */
131         mmu_name = hdr->mmu_name;
132         if (strcmp(mmu_name, PPC64_MMU_G5) == 0 ||
133             strcmp(mmu_name, PPC64_MMU_PHYP) == 0)
134                 PPC64_MMU_OPS(kd) = ppc64_mmu_ops_hpt;
135         else {
136                 _kvm_err(kd, kd->program, "unsupported MMU: %s", mmu_name);
137                 goto failed;
138         }
139         if (PPC64_MMU_OP(kd, init) == -1)
140                 goto failed;
141
142         /* Get dump parts' offsets */
143         bitmap_off      = PPC64_PAGE_SIZE + ppc64_round_page(hdr->msgbufsize);
144         pmap_off        = bitmap_off + ppc64_round_page(hdr->bitmapsize);
145         sparse_off      = pmap_off + ppc64_round_page(hdr->pmapsize);
146
147         /* dump offsets */
148         dprintf("%s: msgbuf_off=0x%jx, bitmap_off=0x%jx, pmap_off=0x%jx, "
149             "sparse_off=0x%jx\n",
150             __func__, (uintmax_t)PPC64_PAGE_SIZE, (uintmax_t)bitmap_off,
151             (uintmax_t)pmap_off, (uintmax_t)sparse_off);
152
153         /* build physical address lookup table for sparse pages */
154         if (_kvm_pt_init(kd, hdr->bitmapsize, bitmap_off, sparse_off,
155             PPC64_PAGE_SIZE, sizeof(uint64_t)) == -1)
156                 goto failed;
157
158         if (_kvm_pmap_init(kd, hdr->pmapsize, pmap_off) == -1)
159                 goto failed;
160         return (0);
161
162 failed:
163         _powerpc64_minidump_freevtop(kd);
164         return (-1);
165 }
166
167 static int
168 _powerpc64_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
169 {
170         if (ISALIVE(kd)) {
171                 _kvm_err(kd, 0, "%s called in live kernel!", __func__);
172                 return (0);
173         }
174         return (PPC64_MMU_OP(kd, kvatop, va, pa));
175 }
176
177 static int
178 _powerpc64_native(kvm_t *kd __unused)
179 {
180 #ifdef __powerpc64__
181         return (1);
182 #else
183         return (0);
184 #endif
185 }
186
187 static kssize_t
188 _powerpc64_kerndisp(kvm_t *kd)
189 {
190         return (kd->vmst->hdr.startkernel - PPC64_KERNBASE);
191 }
192
193 static int
194 _powerpc64_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
195 {
196         return (PPC64_MMU_OP(kd, walk_pages, cb, arg));
197 }
198
199 static struct kvm_arch kvm_powerpc64_minidump = {
200         .ka_probe       = _powerpc64_minidump_probe,
201         .ka_initvtop    = _powerpc64_minidump_initvtop,
202         .ka_freevtop    = _powerpc64_minidump_freevtop,
203         .ka_kvatop      = _powerpc64_minidump_kvatop,
204         .ka_walk_pages  = _powerpc64_minidump_walk_pages,
205         .ka_native      = _powerpc64_native,
206         .ka_kerndisp    = _powerpc64_kerndisp,
207 };
208
209 KVM_ARCH(kvm_powerpc64_minidump);