mirror of
https://github.com/hardkernel/kernel_common_drivers.git
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Jianxiong Pan
2e3b0ba666
PD#SWPL-188508 Problem: add pagetrace debug tool Solution: track page alloc and free info. Verify: sc2. Change-Id: I7efc3d90fc1fbfe8df1b5c2a051623ae3354d0f1 Signed-off-by: Jianxiong Pan <jianxiong.pan@amlogic.com>
138 lines
3.6 KiB
C
138 lines
3.6 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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#ifndef __PAGE_TRACE_H__
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#define __PAGE_TRACE_H__
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#include <asm/memory.h>
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#include <asm/stacktrace.h>
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#include <asm/sections.h>
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#include <linux/page-flags.h>
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/*
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* bit map lay out for _ret_ip table
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*
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* 31 28 27 26 24 23 0
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* +------+---+----------------------+
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* | | | | |
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* +------+---+----------------------+
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* | | | |
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* | | | +-------- offset of ip in base address
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* | | +------------------ MIGRATE_TYPE
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* | +------------------------ base address select
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* | 0: ip base is in kernel address
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* | 1: ip base is in module address
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* +----------------------------- allocate order
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*
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* Note:
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* offset in ip address is Logical shift right by 2 bits,
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* because kernel code are always compiled by ARM instruction
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* set, so pc is aligned by 2. There are 24 bytes used for store
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* offset in kernel/module, plus these 2 shift bits, You must
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* make sure your kernel image size is not larger than 2^26 = 64MB
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*/
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#define IP_ORDER_MASK (0xf0000000)
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#define IP_MODULE_BIT BIT(27)
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#define IP_MIGRATE_MASK (0x07000000)
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#define IP_RANGE_MASK (0x00ffffff)
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/* max order usually should not be 15 */
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#define IP_INVALID (0xf)
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struct page;
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#ifdef CONFIG_ARM64
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struct page_trace {
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union {
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struct {
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unsigned long ret_ip :56;
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unsigned long migrate_type : 3;
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unsigned long module_flag : 1;
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unsigned long order : 4;
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};
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unsigned long ip_data;
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};
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};
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#else
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/* this struct should not larger than 32 bit */
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struct page_trace {
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union {
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struct {
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unsigned long ret_ip :24;
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unsigned long migrate_type : 3;
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unsigned long module_flag : 1;
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unsigned long order : 4;
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};
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unsigned long ip_data;
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};
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};
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#endif
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#if IS_BUILTIN(CONFIG_AMLOGIC_PAGE_TRACE)
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extern struct page_trace *trace_buffer;
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extern unsigned int trace_step;
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#endif
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#if IS_ENABLED(CONFIG_AMLOGIC_PAGE_TRACE)
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u64 get_iow_time(u64 *cpu);
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unsigned long unpack_ip(struct page_trace *trace);
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unsigned long pack_ip(unsigned long ip, unsigned int order, gfp_t flag);
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void set_page_trace(struct page *page, unsigned int order,
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gfp_t gfp_flags, void *func);
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void replace_page_trace(struct page *new, struct page *old);
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void reset_page_trace(struct page *page, unsigned int order);
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void page_trace_mem_init(void);
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struct page_trace *find_page_base(struct page *page);
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unsigned long find_back_trace(void);
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unsigned long get_page_trace(struct page *page);
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#else
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static inline u64 get_iow_time(u64 *cpu)
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{
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return 0;
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}
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static inline unsigned long unpack_ip(struct page_trace *trace)
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{
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return 0;
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}
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static inline void set_page_trace(struct page *page, unsigned int order, gfp_t gfp_flags)
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{
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}
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static inline void reset_page_trace(struct page *page, unsigned int order)
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{
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}
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static inline void page_trace_mem_init(void)
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{
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}
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static inline struct page_trace *find_page_base(struct page *page)
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{
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return NULL;
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}
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static inline unsigned long find_back_trace(void)
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{
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return 0;
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}
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static inline unsigned long get_page_trace(struct page *page)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_KALLSYMS
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extern const unsigned long kallsyms_addresses[] __weak;
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extern const int kallsyms_offsets[] __weak;
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extern const u8 kallsyms_names[] __weak;
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extern const unsigned long kallsyms_num_syms __weak __section(".rodata");
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extern const unsigned long kallsyms_relative_base __weak __section(".rodata");
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extern const u8 kallsyms_token_table[] __weak;
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extern const u16 kallsyms_token_index[] __weak;
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#endif /* CONFIG_KALLSYMS */
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#endif /* __PAGE_TRACE_H__ */
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