170 lines
4.3 KiB
C
170 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Firmware-Assisted Dump internal code.
|
|
*
|
|
* Copyright 2011, Mahesh Salgaonkar, IBM Corporation.
|
|
* Copyright 2019, Hari Bathini, IBM Corporation.
|
|
*/
|
|
|
|
#ifndef _ASM_POWERPC_FADUMP_INTERNAL_H
|
|
#define _ASM_POWERPC_FADUMP_INTERNAL_H
|
|
|
|
/* Maximum number of memory regions kernel supports */
|
|
#define FADUMP_MAX_MEM_REGS 128
|
|
|
|
#ifndef CONFIG_PRESERVE_FA_DUMP
|
|
|
|
/* The upper limit percentage for user specified boot memory size (25%) */
|
|
#define MAX_BOOT_MEM_RATIO 4
|
|
|
|
#define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt)
|
|
|
|
/* Alignment per CMA requirement. */
|
|
#define FADUMP_CMA_ALIGNMENT (PAGE_SIZE << \
|
|
max_t(unsigned long, MAX_ORDER - 1, \
|
|
pageblock_order))
|
|
|
|
/* FAD commands */
|
|
#define FADUMP_REGISTER 1
|
|
#define FADUMP_UNREGISTER 2
|
|
#define FADUMP_INVALIDATE 3
|
|
|
|
/*
|
|
* Copy the ascii values for first 8 characters from a string into u64
|
|
* variable at their respective indexes.
|
|
* e.g.
|
|
* The string "FADMPINF" will be converted into 0x4641444d50494e46
|
|
*/
|
|
static inline u64 fadump_str_to_u64(const char *str)
|
|
{
|
|
u64 val = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(val); i++)
|
|
val = (*str) ? (val << 8) | *str++ : val << 8;
|
|
return val;
|
|
}
|
|
|
|
#define FADUMP_CPU_UNKNOWN (~((u32)0))
|
|
|
|
#define FADUMP_CRASH_INFO_MAGIC fadump_str_to_u64("FADMPINF")
|
|
|
|
/* fadump crash info structure */
|
|
struct fadump_crash_info_header {
|
|
u64 magic_number;
|
|
u64 elfcorehdr_addr;
|
|
u32 crashing_cpu;
|
|
struct pt_regs regs;
|
|
struct cpumask online_mask;
|
|
};
|
|
|
|
struct fadump_memory_range {
|
|
u64 base;
|
|
u64 size;
|
|
};
|
|
|
|
/* fadump memory ranges info */
|
|
struct fadump_mrange_info {
|
|
char name[16];
|
|
struct fadump_memory_range *mem_ranges;
|
|
u32 mem_ranges_sz;
|
|
u32 mem_range_cnt;
|
|
u32 max_mem_ranges;
|
|
};
|
|
|
|
/* Platform specific callback functions */
|
|
struct fadump_ops;
|
|
|
|
/* Firmware-assisted dump configuration details. */
|
|
struct fw_dump {
|
|
unsigned long reserve_dump_area_start;
|
|
unsigned long reserve_dump_area_size;
|
|
/* cmd line option during boot */
|
|
unsigned long reserve_bootvar;
|
|
|
|
unsigned long cpu_state_data_size;
|
|
u64 cpu_state_dest_vaddr;
|
|
u32 cpu_state_data_version;
|
|
u32 cpu_state_entry_size;
|
|
|
|
unsigned long hpte_region_size;
|
|
|
|
unsigned long boot_memory_size;
|
|
u64 boot_mem_dest_addr;
|
|
u64 boot_mem_addr[FADUMP_MAX_MEM_REGS];
|
|
u64 boot_mem_sz[FADUMP_MAX_MEM_REGS];
|
|
u64 boot_mem_top;
|
|
u64 boot_mem_regs_cnt;
|
|
|
|
unsigned long fadumphdr_addr;
|
|
unsigned long cpu_notes_buf_vaddr;
|
|
unsigned long cpu_notes_buf_size;
|
|
|
|
/*
|
|
* Maximum size supported by firmware to copy from source to
|
|
* destination address per entry.
|
|
*/
|
|
u64 max_copy_size;
|
|
u64 kernel_metadata;
|
|
|
|
int ibm_configure_kernel_dump;
|
|
|
|
unsigned long fadump_enabled:1;
|
|
unsigned long fadump_supported:1;
|
|
unsigned long dump_active:1;
|
|
unsigned long dump_registered:1;
|
|
unsigned long nocma:1;
|
|
|
|
struct fadump_ops *ops;
|
|
};
|
|
|
|
struct fadump_ops {
|
|
u64 (*fadump_init_mem_struct)(struct fw_dump *fadump_conf);
|
|
u64 (*fadump_get_metadata_size)(void);
|
|
int (*fadump_setup_metadata)(struct fw_dump *fadump_conf);
|
|
u64 (*fadump_get_bootmem_min)(void);
|
|
int (*fadump_register)(struct fw_dump *fadump_conf);
|
|
int (*fadump_unregister)(struct fw_dump *fadump_conf);
|
|
int (*fadump_invalidate)(struct fw_dump *fadump_conf);
|
|
void (*fadump_cleanup)(struct fw_dump *fadump_conf);
|
|
int (*fadump_process)(struct fw_dump *fadump_conf);
|
|
void (*fadump_region_show)(struct fw_dump *fadump_conf,
|
|
struct seq_file *m);
|
|
void (*fadump_trigger)(struct fadump_crash_info_header *fdh,
|
|
const char *msg);
|
|
};
|
|
|
|
/* Helper functions */
|
|
s32 fadump_setup_cpu_notes_buf(u32 num_cpus);
|
|
void fadump_free_cpu_notes_buf(void);
|
|
u32 *fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs);
|
|
void fadump_update_elfcore_header(char *bufp);
|
|
bool is_fadump_boot_mem_contiguous(void);
|
|
bool is_fadump_reserved_mem_contiguous(void);
|
|
|
|
#else /* !CONFIG_PRESERVE_FA_DUMP */
|
|
|
|
/* Firmware-assisted dump configuration details. */
|
|
struct fw_dump {
|
|
u64 boot_mem_top;
|
|
u64 dump_active;
|
|
};
|
|
|
|
#endif /* CONFIG_PRESERVE_FA_DUMP */
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
extern void rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
|
|
#else
|
|
static inline void
|
|
rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
extern void opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node);
|
|
#else
|
|
static inline void
|
|
opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) { }
|
|
#endif
|
|
|
|
#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */
|