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jian.hu
398e006c67
PD#SWPL-181650 Problem: 1.set linux,iotrace status as disabled BUG: Bad mage state in process insmod pfn:04f00 page:(ptrval) refcount:1 mapcount:129 mapping:00000000 index:0x0 pfn:0x4f00 anon flags: 0x80014(uptodate|lru|swapbacked|zone=0) raw: 00080014 00000100 00000122 c1e9c1f9 00000000 00000000 00000080 00000001 page dumped because: PAGE_FLAGS_CHECK_AT_PREP flag(s) set CPU: 1 PID: 177 Comm: insmod Not tainted 5.15.153-android14-11-00133-gc9b6039dc794 #1 Hardware name: Generic DT based system [bc0a9928+ 12][<c030df1c>] show_stack+0x28/0x2c [bc0a9958+ 44][<c103b9a4>] dump_stack_lvl+0x48/0x54 [bc0a9958+ 28][<c0566fec>] bad_page+0x11c/0x120 [bc0a99f8+ 156][<c0567ff8>] get_populated_pcp_list+0xbe4/0xf2c [bc0a9af0+ 244][<c055fd08>] __rmqueue_pcplist+0x84/0x1270 [bc0a9bc8+ 212][<c05615b0>] get_page_from_freelist+0x268/0x1508 [bc0a9c18+ 76][<c0561154>] __alloc_pages+0xf4/0x2e8 [bc0a9c60+ 68][<c0558ec8>] __vmalloc_node_range+0x26c/0x420 [bc0a9c98+ 52][<c030f090>] module_alloc+0x58/0xac [bc0a9d10+ 116][<c04083b4>] load_module+0x1388/0x1f54 [bc0a9d98+ 132][<c0405510>] sys_init_module+0x1bc/0x1ec [0010062a+1141205134][<c0300060>] ret_fast_syscall+0x0/0x48 Solution: do nothing if linux,iotrace status is disabled in free_iotrace_reserved_memory Verify: t6d br301 Change-Id: I6b5cf5b8ef9b2bce056c2a5d9fd91df9185c73ef Signed-off-by: jian.hu <jian.hu@amlogic.com>
118 lines
2.8 KiB
C
118 lines
2.8 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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*/
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//#define DEBUG
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/types.h>
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#include <linux/moduleparam.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/kasan.h>
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#include <linux/amlogic/module_merge.h>
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#include "main.h"
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#include <linux/amlogic/aml_free_reserved.h>
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unsigned long aml_free_reserved_area(void *start, void *end, int poison, const char *s)
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{
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void *pos;
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unsigned long pages = 0;
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start = (void *)PAGE_ALIGN((unsigned long)start);
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end = (void *)((unsigned long)end & PAGE_MASK);
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for (pos = start; pos < end; pos += PAGE_SIZE, pages++) {
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struct page *page = virt_to_page(pos);
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void *direct_map_addr;
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/*
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* 'direct_map_addr' might be different from 'pos'
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* because some architectures' virt_to_page()
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* work with aliases. Getting the direct map
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* address ensures that we get a _writeable_
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* alias for the memset().
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*/
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direct_map_addr = page_address(page);
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/*
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* Perform a kasan-unchecked memset() since this memory
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* has not been initialized.
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*/
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direct_map_addr = kasan_reset_tag(direct_map_addr);
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if ((unsigned int)poison <= 0xFF)
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memset(direct_map_addr, poison, PAGE_SIZE);
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free_reserved_page(page);
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}
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if (pages && s)
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pr_info("Freeing %s memory: %ldK\n",
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s, pages << (PAGE_SHIFT - 10));
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return pages;
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}
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EXPORT_SYMBOL(aml_free_reserved_area);
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#if IS_ENABLED(CONFIG_AMLOGIC_DEBUG_IOTRACE)
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#include <linux/of_address.h>
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#include <linux/of.h>
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#include <linux/amlogic/aml_iotrace.h>
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void free_iotrace_reserved_memory(void)
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{
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int ret;
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struct resource res;
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struct device_node *node = NULL;
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node = of_find_node_by_path("/reserved-memory/linux,iotrace");
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if (!node)
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return;
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/* Do nothing if linux,iotrace status is disabled */
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if (!of_device_is_available(node))
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return;
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ret = of_address_to_resource(node, 0, &res);
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if (ret)
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return;
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// free reserved-memory if no need
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if (!ramoops_ftrace_en) {
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aml_free_reserved_area(__va(res.start), __va(PAGE_ALIGN(res.end)), 0,
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"free_reserved");
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pr_debug("free iotrace reserved_memory\n");
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}
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}
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#endif
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static int __init memory_main_init(void)
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{
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pr_debug("### %s() start\n", __func__);
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call_sub_init(filecache_module_init);
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call_sub_init(aml_watch_pint_init);
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call_sub_init(aml_reg_init);
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call_sub_init(ddr_tool_init);
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call_sub_init(ramdump_init);
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#if IS_ENABLED(CONFIG_AMLOGIC_DEBUG_IOTRACE)
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free_iotrace_reserved_memory();
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#endif
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pr_debug("### %s() end\n", __func__);
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return 0;
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}
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static void __exit memory_main_exit(void)
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{
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ramdump_uninit();
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ddr_tool_exit();
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aml_reg_exit();
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aml_watch_point_uninit();
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filecache_module_exit();
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}
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module_init(memory_main_init);
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module_exit(memory_main_exit);
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MODULE_LICENSE("GPL v2");
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