mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-11 16:26:46 +07:00
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>
65 lines
1.4 KiB
C
65 lines
1.4 KiB
C
#ifndef __PSTORE_INTERNAL_H__
|
|
#define __PSTORE_INTERNAL_H__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/time.h>
|
|
#include <linux/pstore.h>
|
|
|
|
#if NR_CPUS <= 2 && defined(CONFIG_ARM_THUMB)
|
|
#define PSTORE_CPU_IN_IP 0x1
|
|
#elif NR_CPUS <= 4 && defined(CONFIG_ARM)
|
|
#define PSTORE_CPU_IN_IP 0x3
|
|
#endif
|
|
|
|
struct pstore_ftrace_record {
|
|
unsigned long ip;
|
|
unsigned long parent_ip;
|
|
#ifndef PSTORE_CPU_IN_IP
|
|
unsigned int cpu;
|
|
#endif
|
|
};
|
|
|
|
static inline void
|
|
pstore_ftrace_encode_cpu(struct pstore_ftrace_record *rec, unsigned int cpu)
|
|
{
|
|
#ifndef PSTORE_CPU_IN_IP
|
|
rec->cpu = cpu;
|
|
#else
|
|
rec->ip |= cpu;
|
|
#endif
|
|
}
|
|
|
|
static inline unsigned int
|
|
pstore_ftrace_decode_cpu(struct pstore_ftrace_record *rec)
|
|
{
|
|
#ifndef PSTORE_CPU_IN_IP
|
|
return rec->cpu;
|
|
#else
|
|
return rec->ip & PSTORE_CPU_IN_IP;
|
|
#endif
|
|
}
|
|
|
|
#ifdef CONFIG_PSTORE_FTRACE
|
|
extern void pstore_register_ftrace(void);
|
|
#else
|
|
static inline void pstore_register_ftrace(void) {}
|
|
#endif
|
|
|
|
#ifdef CONFIG_PSTORE_PMSG
|
|
extern void pstore_register_pmsg(void);
|
|
#else
|
|
static inline void pstore_register_pmsg(void) {}
|
|
#endif
|
|
|
|
extern struct pstore_info *psinfo;
|
|
|
|
extern void pstore_set_kmsg_bytes(int);
|
|
extern void pstore_get_records(int);
|
|
extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
|
|
int count, char *data, bool compressed,
|
|
size_t size, struct timespec time,
|
|
struct pstore_info *psi);
|
|
extern int pstore_is_mounted(void);
|
|
|
|
#endif
|