2 * Copyright (c) 2006 Peter Wemm
3 * Copyright (c) 2019 Leandro Lupori
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
26 * From: FreeBSD: src/lib/libkvm/kvm_minidump_riscv.c
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
41 #include "../../sys/powerpc/include/minidump.h"
42 #include "kvm_private.h"
43 #include "kvm_powerpc64.h"
47 _powerpc64_minidump_probe(kvm_t *kd)
49 return (_kvm_probe_elf_kernel(kd, ELFCLASS64, EM_PPC64) &&
50 _kvm_is_minidump(kd));
54 _powerpc64_minidump_freevtop(kvm_t *kd)
56 struct vmstate *vm = kd->vmst;
60 if (PPC64_MMU_OPS(kd))
61 PPC64_MMU_OP(kd, cleanup);
67 _powerpc64_minidump_initvtop(kvm_t *kd)
70 struct minidumphdr *hdr;
71 off_t bitmap_off, pmap_off, sparse_off;
75 vmst = _kvm_malloc(kd, sizeof(*vmst));
77 _kvm_err(kd, kd->program, "cannot allocate vm");
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");
89 if (strncmp(MINIDUMP_MAGIC, hdr->magic, sizeof(hdr->magic)) != 0) {
90 _kvm_err(kd, kd->program, "not a minidump for this platform");
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);
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);
112 vmst->kimg_start = PPC64_KERNBASE;
113 vmst->kimg_end = PPC64_KERNBASE + hdr->endkernel - hdr->startkernel;
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);
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;
136 _kvm_err(kd, kd->program, "unsupported MMU: %s", mmu_name);
139 if (PPC64_MMU_OP(kd, init) == -1)
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);
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);
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)
158 if (_kvm_pmap_init(kd, hdr->pmapsize, pmap_off) == -1)
163 _powerpc64_minidump_freevtop(kd);
168 _powerpc64_minidump_kvatop(kvm_t *kd, kvaddr_t va, off_t *pa)
171 _kvm_err(kd, 0, "%s called in live kernel!", __func__);
174 return (PPC64_MMU_OP(kd, kvatop, va, pa));
178 _powerpc64_native(kvm_t *kd __unused)
188 _powerpc64_kerndisp(kvm_t *kd)
190 return (kd->vmst->hdr.startkernel - PPC64_KERNBASE);
194 _powerpc64_minidump_walk_pages(kvm_t *kd, kvm_walk_pages_cb_t *cb, void *arg)
196 return (PPC64_MMU_OP(kd, walk_pages, cb, arg));
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,
209 KVM_ARCH(kvm_powerpc64_minidump);