mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 01:46:46 +07:00
1227daa43b
When ramoops reserved a memory region in the kernel, it had an unhelpful label of "persistent_memory". When reading /proc/iomem, it would be repeated many times, did not hint that it was ramoops in particular, and didn't clarify very much about what each was used for: 400000000-407ffffff : Persistent Memory (legacy) 400000000-400000fff : persistent_memory 400001000-400001fff : persistent_memory ... 4000ff000-4000fffff : persistent_memory Instead, this adds meaningful labels for how the various regions are being used: 400000000-407ffffff : Persistent Memory (legacy) 400000000-400000fff : ramoops:dump(0/252) 400001000-400001fff : ramoops:dump(1/252) ... 4000fc000-4000fcfff : ramoops:dump(252/252) 4000fd000-4000fdfff : ramoops:console 4000fe000-4000fe3ff : ramoops:ftrace(0/3) 4000fe400-4000fe7ff : ramoops:ftrace(1/3) 4000fe800-4000febff : ramoops:ftrace(2/3) 4000fec00-4000fefff : ramoops:ftrace(3/3) 4000ff000-4000fffff : ramoops:pmsg Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Tested-by: Guenter Roeck <groeck@chromium.org>
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
|
|
* Copyright (C) 2011 Kees Cook <keescook@chromium.org>
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#ifndef __LINUX_PSTORE_RAM_H__
|
|
#define __LINUX_PSTORE_RAM_H__
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
|
|
/*
|
|
* Choose whether access to the RAM zone requires locking or not. If a zone
|
|
* can be written to from different CPUs like with ftrace for example, then
|
|
* PRZ_FLAG_NO_LOCK is used. For all other cases, locking is required.
|
|
*/
|
|
#define PRZ_FLAG_NO_LOCK BIT(0)
|
|
|
|
struct persistent_ram_buffer;
|
|
struct rs_control;
|
|
|
|
struct persistent_ram_ecc_info {
|
|
int block_size;
|
|
int ecc_size;
|
|
int symsize;
|
|
int poly;
|
|
uint16_t *par;
|
|
};
|
|
|
|
struct persistent_ram_zone {
|
|
phys_addr_t paddr;
|
|
size_t size;
|
|
void *vaddr;
|
|
char *label;
|
|
struct persistent_ram_buffer *buffer;
|
|
size_t buffer_size;
|
|
u32 flags;
|
|
raw_spinlock_t buffer_lock;
|
|
|
|
/* ECC correction */
|
|
char *par_buffer;
|
|
char *par_header;
|
|
struct rs_control *rs_decoder;
|
|
int corrected_bytes;
|
|
int bad_blocks;
|
|
struct persistent_ram_ecc_info ecc_info;
|
|
|
|
char *old_log;
|
|
size_t old_log_size;
|
|
};
|
|
|
|
struct persistent_ram_zone *persistent_ram_new(phys_addr_t start, size_t size,
|
|
u32 sig, struct persistent_ram_ecc_info *ecc_info,
|
|
unsigned int memtype, u32 flags, char *label);
|
|
void persistent_ram_free(struct persistent_ram_zone *prz);
|
|
void persistent_ram_zap(struct persistent_ram_zone *prz);
|
|
|
|
int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,
|
|
unsigned int count);
|
|
int persistent_ram_write_user(struct persistent_ram_zone *prz,
|
|
const void __user *s, unsigned int count);
|
|
|
|
void persistent_ram_save_old(struct persistent_ram_zone *prz);
|
|
size_t persistent_ram_old_size(struct persistent_ram_zone *prz);
|
|
void *persistent_ram_old(struct persistent_ram_zone *prz);
|
|
void persistent_ram_free_old(struct persistent_ram_zone *prz);
|
|
ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz,
|
|
char *str, size_t len);
|
|
|
|
/*
|
|
* Ramoops platform data
|
|
* @mem_size memory size for ramoops
|
|
* @mem_address physical memory address to contain ramoops
|
|
*/
|
|
|
|
#define RAMOOPS_FLAG_FTRACE_PER_CPU BIT(0)
|
|
|
|
struct ramoops_platform_data {
|
|
unsigned long mem_size;
|
|
phys_addr_t mem_address;
|
|
unsigned int mem_type;
|
|
unsigned long record_size;
|
|
unsigned long console_size;
|
|
unsigned long ftrace_size;
|
|
unsigned long pmsg_size;
|
|
int dump_oops;
|
|
u32 flags;
|
|
struct persistent_ram_ecc_info ecc_info;
|
|
};
|
|
|
|
#endif
|