mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-18 18:23:53 +08:00
9d5438f462
A secured user-space accessible pstore object. Writes to /dev/pmsg0 are appended to the buffer, on reboot the persistent contents are available in /sys/fs/pstore/pmsg-ramoops-[ID]. One possible use is syslogd, or other daemon, can write messages, then on reboot provides a means to triage user-space activities leading up to a panic as a companion to the pstore dmesg or console logs. Signed-off-by: Mark Salyzyn <salyzyn@android.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
90 lines
2.4 KiB
C
90 lines
2.4 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/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/list.h>
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
|
|
struct persistent_ram_buffer;
|
|
struct rs_control;
|
|
|
|
struct persistent_ram_ecc_info {
|
|
int block_size;
|
|
int ecc_size;
|
|
int symsize;
|
|
int poly;
|
|
};
|
|
|
|
struct persistent_ram_zone {
|
|
phys_addr_t paddr;
|
|
size_t size;
|
|
void *vaddr;
|
|
struct persistent_ram_buffer *buffer;
|
|
size_t buffer_size;
|
|
|
|
/* 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);
|
|
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);
|
|
|
|
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
|
|
*/
|
|
|
|
struct ramoops_platform_data {
|
|
unsigned long mem_size;
|
|
unsigned long 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;
|
|
struct persistent_ram_ecc_info ecc_info;
|
|
};
|
|
|
|
#endif
|