forked from Minki/linux
d8bced27be
Firmware Assisted Dump is a facility to dump kernel core with assistance from firmware. As part of this process the kernel ELF ABI version is stored in the core file. Currently fadump.h defines this to 0 if it is not already defined. This clashes with a define in elf.h which sets it based on the current task - not based on the kernel's ELF ABI version. Use the compiler-provided #define _CALL_ELF which tells us the ELF ABI version of the kernel to set e_flags, this matches what binutils does. Remove the definition in fadump.h, which becomes unused. Signed-off-by: Daniel Axtens <dja@axtens.net> Reviewed-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
214 lines
5.9 KiB
C
214 lines
5.9 KiB
C
/*
|
|
* Firmware Assisted dump header file.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright 2011 IBM Corporation
|
|
* Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
|
|
*/
|
|
|
|
#ifndef __PPC64_FA_DUMP_H__
|
|
#define __PPC64_FA_DUMP_H__
|
|
|
|
#ifdef CONFIG_FA_DUMP
|
|
|
|
/*
|
|
* The RMA region will be saved for later dumping when kernel crashes.
|
|
* RMA is Real Mode Area, the first block of logical memory address owned
|
|
* by logical partition, containing the storage that may be accessed with
|
|
* translate off.
|
|
*/
|
|
#define RMA_START 0x0
|
|
#define RMA_END (ppc64_rma_size)
|
|
|
|
/*
|
|
* On some Power systems where RMO is 128MB, it still requires minimum of
|
|
* 256MB for kernel to boot successfully. When kdump infrastructure is
|
|
* configured to save vmcore over network, we run into OOM issue while
|
|
* loading modules related to network setup. Hence we need aditional 64M
|
|
* of memory to avoid OOM issue.
|
|
*/
|
|
#define MIN_BOOT_MEM (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \
|
|
+ (0x1UL << 26))
|
|
|
|
#define memblock_num_regions(memblock_type) (memblock.memblock_type.cnt)
|
|
|
|
/* Firmware provided dump sections */
|
|
#define FADUMP_CPU_STATE_DATA 0x0001
|
|
#define FADUMP_HPTE_REGION 0x0002
|
|
#define FADUMP_REAL_MODE_REGION 0x0011
|
|
|
|
/* Dump request flag */
|
|
#define FADUMP_REQUEST_FLAG 0x00000001
|
|
|
|
/* FAD commands */
|
|
#define FADUMP_REGISTER 1
|
|
#define FADUMP_UNREGISTER 2
|
|
#define FADUMP_INVALIDATE 3
|
|
|
|
/* Dump status flag */
|
|
#define FADUMP_ERROR_FLAG 0x2000
|
|
|
|
#define FADUMP_CPU_ID_MASK ((1UL << 32) - 1)
|
|
|
|
#define CPU_UNKNOWN (~((u32)0))
|
|
|
|
/* Utility macros */
|
|
#define SKIP_TO_NEXT_CPU(reg_entry) \
|
|
({ \
|
|
while (be64_to_cpu(reg_entry->reg_id) != REG_ID("CPUEND")) \
|
|
reg_entry++; \
|
|
reg_entry++; \
|
|
})
|
|
|
|
/* Kernel Dump section info */
|
|
struct fadump_section {
|
|
__be32 request_flag;
|
|
__be16 source_data_type;
|
|
__be16 error_flags;
|
|
__be64 source_address;
|
|
__be64 source_len;
|
|
__be64 bytes_dumped;
|
|
__be64 destination_address;
|
|
};
|
|
|
|
/* ibm,configure-kernel-dump header. */
|
|
struct fadump_section_header {
|
|
__be32 dump_format_version;
|
|
__be16 dump_num_sections;
|
|
__be16 dump_status_flag;
|
|
__be32 offset_first_dump_section;
|
|
|
|
/* Fields for disk dump option. */
|
|
__be32 dd_block_size;
|
|
__be64 dd_block_offset;
|
|
__be64 dd_num_blocks;
|
|
__be32 dd_offset_disk_path;
|
|
|
|
/* Maximum time allowed to prevent an automatic dump-reboot. */
|
|
__be32 max_time_auto;
|
|
};
|
|
|
|
/*
|
|
* Firmware Assisted dump memory structure. This structure is required for
|
|
* registering future kernel dump with power firmware through rtas call.
|
|
*
|
|
* No disk dump option. Hence disk dump path string section is not included.
|
|
*/
|
|
struct fadump_mem_struct {
|
|
struct fadump_section_header header;
|
|
|
|
/* Kernel dump sections */
|
|
struct fadump_section cpu_state_data;
|
|
struct fadump_section hpte_region;
|
|
struct fadump_section rmr_region;
|
|
};
|
|
|
|
/* Firmware-assisted dump configuration details. */
|
|
struct fw_dump {
|
|
unsigned long cpu_state_data_size;
|
|
unsigned long hpte_region_size;
|
|
unsigned long boot_memory_size;
|
|
unsigned long reserve_dump_area_start;
|
|
unsigned long reserve_dump_area_size;
|
|
/* cmd line option during boot */
|
|
unsigned long reserve_bootvar;
|
|
|
|
unsigned long fadumphdr_addr;
|
|
unsigned long cpu_notes_buf;
|
|
unsigned long cpu_notes_buf_size;
|
|
|
|
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;
|
|
};
|
|
|
|
/*
|
|
* 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 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 STR_TO_HEX(x) str_to_u64(x)
|
|
#define REG_ID(x) str_to_u64(x)
|
|
|
|
#define FADUMP_CRASH_INFO_MAGIC STR_TO_HEX("FADMPINF")
|
|
#define REGSAVE_AREA_MAGIC STR_TO_HEX("REGSAVE")
|
|
|
|
/* The firmware-assisted dump format.
|
|
*
|
|
* The register save area is an area in the partition's memory used to preserve
|
|
* the register contents (CPU state data) for the active CPUs during a firmware
|
|
* assisted dump. The dump format contains register save area header followed
|
|
* by register entries. Each list of registers for a CPU starts with
|
|
* "CPUSTRT" and ends with "CPUEND".
|
|
*/
|
|
|
|
/* Register save area header. */
|
|
struct fadump_reg_save_area_header {
|
|
__be64 magic_number;
|
|
__be32 version;
|
|
__be32 num_cpu_offset;
|
|
};
|
|
|
|
/* Register entry. */
|
|
struct fadump_reg_entry {
|
|
__be64 reg_id;
|
|
__be64 reg_value;
|
|
};
|
|
|
|
/* 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;
|
|
};
|
|
|
|
/* Crash memory ranges */
|
|
#define INIT_CRASHMEM_RANGES (INIT_MEMBLOCK_REGIONS + 2)
|
|
|
|
struct fad_crash_memory_ranges {
|
|
unsigned long long base;
|
|
unsigned long long size;
|
|
};
|
|
|
|
extern int early_init_dt_scan_fw_dump(unsigned long node,
|
|
const char *uname, int depth, void *data);
|
|
extern int fadump_reserve_mem(void);
|
|
extern int setup_fadump(void);
|
|
extern int is_fadump_active(void);
|
|
extern void crash_fadump(struct pt_regs *, const char *);
|
|
extern void fadump_cleanup(void);
|
|
|
|
#else /* CONFIG_FA_DUMP */
|
|
static inline int is_fadump_active(void) { return 0; }
|
|
static inline void crash_fadump(struct pt_regs *regs, const char *str) { }
|
|
#endif
|
|
#endif
|