1c048ddf8SAnshuman Khandual // SPDX-License-Identifier: GPL-2.0-only
2c048ddf8SAnshuman Khandual /*
3c048ddf8SAnshuman Khandual * Copyright (c) 2014, The Linux Foundation. All rights reserved.
4c048ddf8SAnshuman Khandual * Debug helper to dump the current kernel pagetables of the system
5c048ddf8SAnshuman Khandual * so that we can see what the various memory ranges are set to.
6c048ddf8SAnshuman Khandual *
7c048ddf8SAnshuman Khandual * Derived from x86 and arm implementation:
8c048ddf8SAnshuman Khandual * (C) Copyright 2008 Intel Corporation
9c048ddf8SAnshuman Khandual *
10c048ddf8SAnshuman Khandual * Author: Arjan van de Ven <arjan@linux.intel.com>
11c048ddf8SAnshuman Khandual */
12c048ddf8SAnshuman Khandual #include <linux/debugfs.h>
13c048ddf8SAnshuman Khandual #include <linux/errno.h>
14c048ddf8SAnshuman Khandual #include <linux/fs.h>
15c048ddf8SAnshuman Khandual #include <linux/io.h>
16c048ddf8SAnshuman Khandual #include <linux/init.h>
17c048ddf8SAnshuman Khandual #include <linux/mm.h>
18c048ddf8SAnshuman Khandual #include <linux/ptdump.h>
19c048ddf8SAnshuman Khandual #include <linux/sched.h>
20c048ddf8SAnshuman Khandual #include <linux/seq_file.h>
21c048ddf8SAnshuman Khandual
22c048ddf8SAnshuman Khandual #include <asm/fixmap.h>
23c048ddf8SAnshuman Khandual #include <asm/kasan.h>
24c048ddf8SAnshuman Khandual #include <asm/memory.h>
25c048ddf8SAnshuman Khandual #include <asm/pgtable-hwdef.h>
26c048ddf8SAnshuman Khandual #include <asm/ptdump.h>
27c048ddf8SAnshuman Khandual
28c048ddf8SAnshuman Khandual
29c048ddf8SAnshuman Khandual enum address_markers_idx {
30c048ddf8SAnshuman Khandual PAGE_OFFSET_NR = 0,
31c048ddf8SAnshuman Khandual PAGE_END_NR,
320fea6e9aSAndrey Konovalov #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
33c048ddf8SAnshuman Khandual KASAN_START_NR,
34c048ddf8SAnshuman Khandual #endif
35c048ddf8SAnshuman Khandual };
36c048ddf8SAnshuman Khandual
37c048ddf8SAnshuman Khandual static struct addr_marker address_markers[] = {
38c048ddf8SAnshuman Khandual { PAGE_OFFSET, "Linear Mapping start" },
39c048ddf8SAnshuman Khandual { 0 /* PAGE_END */, "Linear Mapping end" },
400fea6e9aSAndrey Konovalov #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
41c048ddf8SAnshuman Khandual { 0 /* KASAN_SHADOW_START */, "Kasan shadow start" },
42c048ddf8SAnshuman Khandual { KASAN_SHADOW_END, "Kasan shadow end" },
43c048ddf8SAnshuman Khandual #endif
44c048ddf8SAnshuman Khandual { MODULES_VADDR, "Modules start" },
45c048ddf8SAnshuman Khandual { MODULES_END, "Modules end" },
46c048ddf8SAnshuman Khandual { VMALLOC_START, "vmalloc() area" },
47c048ddf8SAnshuman Khandual { VMALLOC_END, "vmalloc() end" },
48*32f5b699SMark Rutland { FIXADDR_TOT_START, "Fixmap start" },
49c048ddf8SAnshuman Khandual { FIXADDR_TOP, "Fixmap end" },
50c048ddf8SAnshuman Khandual { PCI_IO_START, "PCI I/O start" },
51c048ddf8SAnshuman Khandual { PCI_IO_END, "PCI I/O end" },
52c048ddf8SAnshuman Khandual { VMEMMAP_START, "vmemmap start" },
53c048ddf8SAnshuman Khandual { VMEMMAP_START + VMEMMAP_SIZE, "vmemmap end" },
54c048ddf8SAnshuman Khandual { -1, NULL },
55c048ddf8SAnshuman Khandual };
56c048ddf8SAnshuman Khandual
57c048ddf8SAnshuman Khandual #define pt_dump_seq_printf(m, fmt, args...) \
58c048ddf8SAnshuman Khandual ({ \
59c048ddf8SAnshuman Khandual if (m) \
60c048ddf8SAnshuman Khandual seq_printf(m, fmt, ##args); \
61c048ddf8SAnshuman Khandual })
62c048ddf8SAnshuman Khandual
63c048ddf8SAnshuman Khandual #define pt_dump_seq_puts(m, fmt) \
64c048ddf8SAnshuman Khandual ({ \
65c048ddf8SAnshuman Khandual if (m) \
66c048ddf8SAnshuman Khandual seq_printf(m, fmt); \
67c048ddf8SAnshuman Khandual })
68c048ddf8SAnshuman Khandual
69c048ddf8SAnshuman Khandual /*
70c048ddf8SAnshuman Khandual * The page dumper groups page table entries of the same type into a single
71c048ddf8SAnshuman Khandual * description. It uses pg_state to track the range information while
72c048ddf8SAnshuman Khandual * iterating over the pte entries. When the continuity is broken it then
73c048ddf8SAnshuman Khandual * dumps out a description of the range.
74c048ddf8SAnshuman Khandual */
75c048ddf8SAnshuman Khandual struct pg_state {
76c048ddf8SAnshuman Khandual struct ptdump_state ptdump;
77c048ddf8SAnshuman Khandual struct seq_file *seq;
78c048ddf8SAnshuman Khandual const struct addr_marker *marker;
79c048ddf8SAnshuman Khandual unsigned long start_address;
80c048ddf8SAnshuman Khandual int level;
81c048ddf8SAnshuman Khandual u64 current_prot;
82c048ddf8SAnshuman Khandual bool check_wx;
83c048ddf8SAnshuman Khandual unsigned long wx_pages;
84c048ddf8SAnshuman Khandual unsigned long uxn_pages;
85c048ddf8SAnshuman Khandual };
86c048ddf8SAnshuman Khandual
87c048ddf8SAnshuman Khandual struct prot_bits {
88c048ddf8SAnshuman Khandual u64 mask;
89c048ddf8SAnshuman Khandual u64 val;
90c048ddf8SAnshuman Khandual const char *set;
91c048ddf8SAnshuman Khandual const char *clear;
92c048ddf8SAnshuman Khandual };
93c048ddf8SAnshuman Khandual
94c048ddf8SAnshuman Khandual static const struct prot_bits pte_bits[] = {
95c048ddf8SAnshuman Khandual {
96c048ddf8SAnshuman Khandual .mask = PTE_VALID,
97c048ddf8SAnshuman Khandual .val = PTE_VALID,
98c048ddf8SAnshuman Khandual .set = " ",
99c048ddf8SAnshuman Khandual .clear = "F",
100c048ddf8SAnshuman Khandual }, {
101c048ddf8SAnshuman Khandual .mask = PTE_USER,
102c048ddf8SAnshuman Khandual .val = PTE_USER,
103c048ddf8SAnshuman Khandual .set = "USR",
104c048ddf8SAnshuman Khandual .clear = " ",
105c048ddf8SAnshuman Khandual }, {
106c048ddf8SAnshuman Khandual .mask = PTE_RDONLY,
107c048ddf8SAnshuman Khandual .val = PTE_RDONLY,
108c048ddf8SAnshuman Khandual .set = "ro",
109c048ddf8SAnshuman Khandual .clear = "RW",
110c048ddf8SAnshuman Khandual }, {
111c048ddf8SAnshuman Khandual .mask = PTE_PXN,
112c048ddf8SAnshuman Khandual .val = PTE_PXN,
113c048ddf8SAnshuman Khandual .set = "NX",
114c048ddf8SAnshuman Khandual .clear = "x ",
115c048ddf8SAnshuman Khandual }, {
116c048ddf8SAnshuman Khandual .mask = PTE_SHARED,
117c048ddf8SAnshuman Khandual .val = PTE_SHARED,
118c048ddf8SAnshuman Khandual .set = "SHD",
119c048ddf8SAnshuman Khandual .clear = " ",
120c048ddf8SAnshuman Khandual }, {
121c048ddf8SAnshuman Khandual .mask = PTE_AF,
122c048ddf8SAnshuman Khandual .val = PTE_AF,
123c048ddf8SAnshuman Khandual .set = "AF",
124c048ddf8SAnshuman Khandual .clear = " ",
125c048ddf8SAnshuman Khandual }, {
126c048ddf8SAnshuman Khandual .mask = PTE_NG,
127c048ddf8SAnshuman Khandual .val = PTE_NG,
128c048ddf8SAnshuman Khandual .set = "NG",
129c048ddf8SAnshuman Khandual .clear = " ",
130c048ddf8SAnshuman Khandual }, {
131c048ddf8SAnshuman Khandual .mask = PTE_CONT,
132c048ddf8SAnshuman Khandual .val = PTE_CONT,
133c048ddf8SAnshuman Khandual .set = "CON",
134c048ddf8SAnshuman Khandual .clear = " ",
135c048ddf8SAnshuman Khandual }, {
136c048ddf8SAnshuman Khandual .mask = PTE_TABLE_BIT,
137c048ddf8SAnshuman Khandual .val = PTE_TABLE_BIT,
138c048ddf8SAnshuman Khandual .set = " ",
139c048ddf8SAnshuman Khandual .clear = "BLK",
140c048ddf8SAnshuman Khandual }, {
141c048ddf8SAnshuman Khandual .mask = PTE_UXN,
142c048ddf8SAnshuman Khandual .val = PTE_UXN,
143c048ddf8SAnshuman Khandual .set = "UXN",
144c048ddf8SAnshuman Khandual .clear = " ",
145c048ddf8SAnshuman Khandual }, {
146c048ddf8SAnshuman Khandual .mask = PTE_GP,
147c048ddf8SAnshuman Khandual .val = PTE_GP,
148c048ddf8SAnshuman Khandual .set = "GP",
149c048ddf8SAnshuman Khandual .clear = " ",
150c048ddf8SAnshuman Khandual }, {
151c048ddf8SAnshuman Khandual .mask = PTE_ATTRINDX_MASK,
152c048ddf8SAnshuman Khandual .val = PTE_ATTRINDX(MT_DEVICE_nGnRnE),
153c048ddf8SAnshuman Khandual .set = "DEVICE/nGnRnE",
154c048ddf8SAnshuman Khandual }, {
155c048ddf8SAnshuman Khandual .mask = PTE_ATTRINDX_MASK,
156c048ddf8SAnshuman Khandual .val = PTE_ATTRINDX(MT_DEVICE_nGnRE),
157c048ddf8SAnshuman Khandual .set = "DEVICE/nGnRE",
158c048ddf8SAnshuman Khandual }, {
159c048ddf8SAnshuman Khandual .mask = PTE_ATTRINDX_MASK,
160c048ddf8SAnshuman Khandual .val = PTE_ATTRINDX(MT_NORMAL_NC),
161c048ddf8SAnshuman Khandual .set = "MEM/NORMAL-NC",
162c048ddf8SAnshuman Khandual }, {
163c048ddf8SAnshuman Khandual .mask = PTE_ATTRINDX_MASK,
164c048ddf8SAnshuman Khandual .val = PTE_ATTRINDX(MT_NORMAL),
165c048ddf8SAnshuman Khandual .set = "MEM/NORMAL",
166baab8532SWill Deacon }, {
167baab8532SWill Deacon .mask = PTE_ATTRINDX_MASK,
168baab8532SWill Deacon .val = PTE_ATTRINDX(MT_NORMAL_TAGGED),
169baab8532SWill Deacon .set = "MEM/NORMAL-TAGGED",
170c048ddf8SAnshuman Khandual }
171c048ddf8SAnshuman Khandual };
172c048ddf8SAnshuman Khandual
173c048ddf8SAnshuman Khandual struct pg_level {
174c048ddf8SAnshuman Khandual const struct prot_bits *bits;
175c048ddf8SAnshuman Khandual const char *name;
176c048ddf8SAnshuman Khandual size_t num;
177c048ddf8SAnshuman Khandual u64 mask;
178c048ddf8SAnshuman Khandual };
179c048ddf8SAnshuman Khandual
180c048ddf8SAnshuman Khandual static struct pg_level pg_level[] = {
181c048ddf8SAnshuman Khandual { /* pgd */
182c048ddf8SAnshuman Khandual .name = "PGD",
183c048ddf8SAnshuman Khandual .bits = pte_bits,
184c048ddf8SAnshuman Khandual .num = ARRAY_SIZE(pte_bits),
185c048ddf8SAnshuman Khandual }, { /* p4d */
186c048ddf8SAnshuman Khandual .name = "P4D",
187c048ddf8SAnshuman Khandual .bits = pte_bits,
188c048ddf8SAnshuman Khandual .num = ARRAY_SIZE(pte_bits),
189c048ddf8SAnshuman Khandual }, { /* pud */
190c048ddf8SAnshuman Khandual .name = (CONFIG_PGTABLE_LEVELS > 3) ? "PUD" : "PGD",
191c048ddf8SAnshuman Khandual .bits = pte_bits,
192c048ddf8SAnshuman Khandual .num = ARRAY_SIZE(pte_bits),
193c048ddf8SAnshuman Khandual }, { /* pmd */
194c048ddf8SAnshuman Khandual .name = (CONFIG_PGTABLE_LEVELS > 2) ? "PMD" : "PGD",
195c048ddf8SAnshuman Khandual .bits = pte_bits,
196c048ddf8SAnshuman Khandual .num = ARRAY_SIZE(pte_bits),
197c048ddf8SAnshuman Khandual }, { /* pte */
198c048ddf8SAnshuman Khandual .name = "PTE",
199c048ddf8SAnshuman Khandual .bits = pte_bits,
200c048ddf8SAnshuman Khandual .num = ARRAY_SIZE(pte_bits),
201c048ddf8SAnshuman Khandual },
202c048ddf8SAnshuman Khandual };
203c048ddf8SAnshuman Khandual
dump_prot(struct pg_state * st,const struct prot_bits * bits,size_t num)204c048ddf8SAnshuman Khandual static void dump_prot(struct pg_state *st, const struct prot_bits *bits,
205c048ddf8SAnshuman Khandual size_t num)
206c048ddf8SAnshuman Khandual {
207c048ddf8SAnshuman Khandual unsigned i;
208c048ddf8SAnshuman Khandual
209c048ddf8SAnshuman Khandual for (i = 0; i < num; i++, bits++) {
210c048ddf8SAnshuman Khandual const char *s;
211c048ddf8SAnshuman Khandual
212c048ddf8SAnshuman Khandual if ((st->current_prot & bits->mask) == bits->val)
213c048ddf8SAnshuman Khandual s = bits->set;
214c048ddf8SAnshuman Khandual else
215c048ddf8SAnshuman Khandual s = bits->clear;
216c048ddf8SAnshuman Khandual
217c048ddf8SAnshuman Khandual if (s)
218c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, " %s", s);
219c048ddf8SAnshuman Khandual }
220c048ddf8SAnshuman Khandual }
221c048ddf8SAnshuman Khandual
note_prot_uxn(struct pg_state * st,unsigned long addr)222c048ddf8SAnshuman Khandual static void note_prot_uxn(struct pg_state *st, unsigned long addr)
223c048ddf8SAnshuman Khandual {
224c048ddf8SAnshuman Khandual if (!st->check_wx)
225c048ddf8SAnshuman Khandual return;
226c048ddf8SAnshuman Khandual
227c048ddf8SAnshuman Khandual if ((st->current_prot & PTE_UXN) == PTE_UXN)
228c048ddf8SAnshuman Khandual return;
229c048ddf8SAnshuman Khandual
230c048ddf8SAnshuman Khandual WARN_ONCE(1, "arm64/mm: Found non-UXN mapping at address %p/%pS\n",
231c048ddf8SAnshuman Khandual (void *)st->start_address, (void *)st->start_address);
232c048ddf8SAnshuman Khandual
233c048ddf8SAnshuman Khandual st->uxn_pages += (addr - st->start_address) / PAGE_SIZE;
234c048ddf8SAnshuman Khandual }
235c048ddf8SAnshuman Khandual
note_prot_wx(struct pg_state * st,unsigned long addr)236c048ddf8SAnshuman Khandual static void note_prot_wx(struct pg_state *st, unsigned long addr)
237c048ddf8SAnshuman Khandual {
238c048ddf8SAnshuman Khandual if (!st->check_wx)
239c048ddf8SAnshuman Khandual return;
240c048ddf8SAnshuman Khandual if ((st->current_prot & PTE_RDONLY) == PTE_RDONLY)
241c048ddf8SAnshuman Khandual return;
242c048ddf8SAnshuman Khandual if ((st->current_prot & PTE_PXN) == PTE_PXN)
243c048ddf8SAnshuman Khandual return;
244c048ddf8SAnshuman Khandual
245c048ddf8SAnshuman Khandual WARN_ONCE(1, "arm64/mm: Found insecure W+X mapping at address %p/%pS\n",
246c048ddf8SAnshuman Khandual (void *)st->start_address, (void *)st->start_address);
247c048ddf8SAnshuman Khandual
248c048ddf8SAnshuman Khandual st->wx_pages += (addr - st->start_address) / PAGE_SIZE;
249c048ddf8SAnshuman Khandual }
250c048ddf8SAnshuman Khandual
note_page(struct ptdump_state * pt_st,unsigned long addr,int level,u64 val)251c048ddf8SAnshuman Khandual static void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
252c048ddf8SAnshuman Khandual u64 val)
253c048ddf8SAnshuman Khandual {
254c048ddf8SAnshuman Khandual struct pg_state *st = container_of(pt_st, struct pg_state, ptdump);
255c048ddf8SAnshuman Khandual static const char units[] = "KMGTPE";
256c048ddf8SAnshuman Khandual u64 prot = 0;
257c048ddf8SAnshuman Khandual
258c048ddf8SAnshuman Khandual if (level >= 0)
259c048ddf8SAnshuman Khandual prot = val & pg_level[level].mask;
260c048ddf8SAnshuman Khandual
261c048ddf8SAnshuman Khandual if (st->level == -1) {
262c048ddf8SAnshuman Khandual st->level = level;
263c048ddf8SAnshuman Khandual st->current_prot = prot;
264c048ddf8SAnshuman Khandual st->start_address = addr;
265c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
266c048ddf8SAnshuman Khandual } else if (prot != st->current_prot || level != st->level ||
267c048ddf8SAnshuman Khandual addr >= st->marker[1].start_address) {
268c048ddf8SAnshuman Khandual const char *unit = units;
269c048ddf8SAnshuman Khandual unsigned long delta;
270c048ddf8SAnshuman Khandual
271c048ddf8SAnshuman Khandual if (st->current_prot) {
272c048ddf8SAnshuman Khandual note_prot_uxn(st, addr);
273c048ddf8SAnshuman Khandual note_prot_wx(st, addr);
274c048ddf8SAnshuman Khandual }
275c048ddf8SAnshuman Khandual
276c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, "0x%016lx-0x%016lx ",
277c048ddf8SAnshuman Khandual st->start_address, addr);
278c048ddf8SAnshuman Khandual
279c048ddf8SAnshuman Khandual delta = (addr - st->start_address) >> 10;
280c048ddf8SAnshuman Khandual while (!(delta & 1023) && unit[1]) {
281c048ddf8SAnshuman Khandual delta >>= 10;
282c048ddf8SAnshuman Khandual unit++;
283c048ddf8SAnshuman Khandual }
284c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, "%9lu%c %s", delta, *unit,
285c048ddf8SAnshuman Khandual pg_level[st->level].name);
286c048ddf8SAnshuman Khandual if (st->current_prot && pg_level[st->level].bits)
287c048ddf8SAnshuman Khandual dump_prot(st, pg_level[st->level].bits,
288c048ddf8SAnshuman Khandual pg_level[st->level].num);
289c048ddf8SAnshuman Khandual pt_dump_seq_puts(st->seq, "\n");
290c048ddf8SAnshuman Khandual
291c048ddf8SAnshuman Khandual if (addr >= st->marker[1].start_address) {
292c048ddf8SAnshuman Khandual st->marker++;
293c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
294c048ddf8SAnshuman Khandual }
295c048ddf8SAnshuman Khandual
296c048ddf8SAnshuman Khandual st->start_address = addr;
297c048ddf8SAnshuman Khandual st->current_prot = prot;
298c048ddf8SAnshuman Khandual st->level = level;
299c048ddf8SAnshuman Khandual }
300c048ddf8SAnshuman Khandual
301c048ddf8SAnshuman Khandual if (addr >= st->marker[1].start_address) {
302c048ddf8SAnshuman Khandual st->marker++;
303c048ddf8SAnshuman Khandual pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
304c048ddf8SAnshuman Khandual }
305c048ddf8SAnshuman Khandual
306c048ddf8SAnshuman Khandual }
307c048ddf8SAnshuman Khandual
ptdump_walk(struct seq_file * s,struct ptdump_info * info)308c048ddf8SAnshuman Khandual void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
309c048ddf8SAnshuman Khandual {
310c048ddf8SAnshuman Khandual unsigned long end = ~0UL;
311c048ddf8SAnshuman Khandual struct pg_state st;
312c048ddf8SAnshuman Khandual
313c048ddf8SAnshuman Khandual if (info->base_addr < TASK_SIZE_64)
314c048ddf8SAnshuman Khandual end = TASK_SIZE_64;
315c048ddf8SAnshuman Khandual
316c048ddf8SAnshuman Khandual st = (struct pg_state){
317c048ddf8SAnshuman Khandual .seq = s,
318c048ddf8SAnshuman Khandual .marker = info->markers,
319b9ba6809SHailong Liu .level = -1,
320c048ddf8SAnshuman Khandual .ptdump = {
321c048ddf8SAnshuman Khandual .note_page = note_page,
322c048ddf8SAnshuman Khandual .range = (struct ptdump_range[]){
323c048ddf8SAnshuman Khandual {info->base_addr, end},
324c048ddf8SAnshuman Khandual {0, 0}
325c048ddf8SAnshuman Khandual }
326c048ddf8SAnshuman Khandual }
327c048ddf8SAnshuman Khandual };
328c048ddf8SAnshuman Khandual
329c048ddf8SAnshuman Khandual ptdump_walk_pgd(&st.ptdump, info->mm, NULL);
330c048ddf8SAnshuman Khandual }
331c048ddf8SAnshuman Khandual
ptdump_initialize(void)332a7dcf58aSJisheng Zhang static void __init ptdump_initialize(void)
333c048ddf8SAnshuman Khandual {
334c048ddf8SAnshuman Khandual unsigned i, j;
335c048ddf8SAnshuman Khandual
336c048ddf8SAnshuman Khandual for (i = 0; i < ARRAY_SIZE(pg_level); i++)
337c048ddf8SAnshuman Khandual if (pg_level[i].bits)
338c048ddf8SAnshuman Khandual for (j = 0; j < pg_level[i].num; j++)
339c048ddf8SAnshuman Khandual pg_level[i].mask |= pg_level[i].bits[j].mask;
340c048ddf8SAnshuman Khandual }
341c048ddf8SAnshuman Khandual
342c048ddf8SAnshuman Khandual static struct ptdump_info kernel_ptdump_info = {
343c048ddf8SAnshuman Khandual .mm = &init_mm,
344c048ddf8SAnshuman Khandual .markers = address_markers,
345c048ddf8SAnshuman Khandual .base_addr = PAGE_OFFSET,
346c048ddf8SAnshuman Khandual };
347c048ddf8SAnshuman Khandual
ptdump_check_wx(void)348c048ddf8SAnshuman Khandual void ptdump_check_wx(void)
349c048ddf8SAnshuman Khandual {
350c048ddf8SAnshuman Khandual struct pg_state st = {
351c048ddf8SAnshuman Khandual .seq = NULL,
352c048ddf8SAnshuman Khandual .marker = (struct addr_marker[]) {
353c048ddf8SAnshuman Khandual { 0, NULL},
354c048ddf8SAnshuman Khandual { -1, NULL},
355c048ddf8SAnshuman Khandual },
356c048ddf8SAnshuman Khandual .level = -1,
357c048ddf8SAnshuman Khandual .check_wx = true,
358c048ddf8SAnshuman Khandual .ptdump = {
359c048ddf8SAnshuman Khandual .note_page = note_page,
360c048ddf8SAnshuman Khandual .range = (struct ptdump_range[]) {
361c048ddf8SAnshuman Khandual {PAGE_OFFSET, ~0UL},
362c048ddf8SAnshuman Khandual {0, 0}
363c048ddf8SAnshuman Khandual }
364c048ddf8SAnshuman Khandual }
365c048ddf8SAnshuman Khandual };
366c048ddf8SAnshuman Khandual
367c048ddf8SAnshuman Khandual ptdump_walk_pgd(&st.ptdump, &init_mm, NULL);
368c048ddf8SAnshuman Khandual
369c048ddf8SAnshuman Khandual if (st.wx_pages || st.uxn_pages)
370c048ddf8SAnshuman Khandual pr_warn("Checked W+X mappings: FAILED, %lu W+X pages found, %lu non-UXN pages found\n",
371c048ddf8SAnshuman Khandual st.wx_pages, st.uxn_pages);
372c048ddf8SAnshuman Khandual else
373c048ddf8SAnshuman Khandual pr_info("Checked W+X mappings: passed, no W+X pages found\n");
374c048ddf8SAnshuman Khandual }
375c048ddf8SAnshuman Khandual
ptdump_init(void)376a7dcf58aSJisheng Zhang static int __init ptdump_init(void)
377c048ddf8SAnshuman Khandual {
378c048ddf8SAnshuman Khandual address_markers[PAGE_END_NR].start_address = PAGE_END;
3790fea6e9aSAndrey Konovalov #if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
380c048ddf8SAnshuman Khandual address_markers[KASAN_START_NR].start_address = KASAN_SHADOW_START;
381c048ddf8SAnshuman Khandual #endif
382c048ddf8SAnshuman Khandual ptdump_initialize();
383c048ddf8SAnshuman Khandual ptdump_debugfs_register(&kernel_ptdump_info, "kernel_page_tables");
384c048ddf8SAnshuman Khandual return 0;
385c048ddf8SAnshuman Khandual }
386c048ddf8SAnshuman Khandual device_initcall(ptdump_init);
387