3ccc00a7e0
On 2012-02-20 11:02:51 Mon, Paul Mackerras wrote: > On Thu, Feb 16, 2012 at 04:44:30PM +0530, Mahesh J Salgaonkar wrote: > > If I have read the code correctly, we are going to get this printk on > non-pSeries machines or on older pSeries machines, even if the user > has not put the fadump=on option on the kernel command line. The > printk will be annoying since there is no actual error condition. It > seems to me that the condition for the printk should include > fw_dump.fadump_enabled. In other words you should probably add > > if (!fw_dump.fadump_enabled) > return 0; > > at the beginning of the function. Hi Paul, Thanks for pointing it out. Please find the updated patch below. The existing patches above this (4/10 through 10/10) cleanly applies on this update. Thanks, -Mahesh. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* Firmware Assisted dump header file.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright 2011 IBM Corporation
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* Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
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*/
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#ifndef __PPC64_FA_DUMP_H__
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#define __PPC64_FA_DUMP_H__
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#ifdef CONFIG_FA_DUMP
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/*
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* The RMA region will be saved for later dumping when kernel crashes.
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* RMA is Real Mode Area, the first block of logical memory address owned
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* by logical partition, containing the storage that may be accessed with
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* translate off.
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*/
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#define RMA_START 0x0
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#define RMA_END (ppc64_rma_size)
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/*
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* On some Power systems where RMO is 128MB, it still requires minimum of
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* 256MB for kernel to boot successfully. When kdump infrastructure is
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* configured to save vmcore over network, we run into OOM issue while
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* loading modules related to network setup. Hence we need aditional 64M
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* of memory to avoid OOM issue.
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*/
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#define MIN_BOOT_MEM (((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \
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+ (0x1UL << 26))
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/* Firmware provided dump sections */
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#define FADUMP_CPU_STATE_DATA 0x0001
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#define FADUMP_HPTE_REGION 0x0002
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#define FADUMP_REAL_MODE_REGION 0x0011
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/* Dump request flag */
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#define FADUMP_REQUEST_FLAG 0x00000001
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/* FAD commands */
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#define FADUMP_REGISTER 1
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#define FADUMP_UNREGISTER 2
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#define FADUMP_INVALIDATE 3
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/* Kernel Dump section info */
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struct fadump_section {
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u32 request_flag;
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u16 source_data_type;
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u16 error_flags;
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u64 source_address;
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u64 source_len;
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u64 bytes_dumped;
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u64 destination_address;
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};
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/* ibm,configure-kernel-dump header. */
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struct fadump_section_header {
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u32 dump_format_version;
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u16 dump_num_sections;
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u16 dump_status_flag;
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u32 offset_first_dump_section;
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/* Fields for disk dump option. */
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u32 dd_block_size;
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u64 dd_block_offset;
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u64 dd_num_blocks;
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u32 dd_offset_disk_path;
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/* Maximum time allowed to prevent an automatic dump-reboot. */
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u32 max_time_auto;
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};
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/*
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* Firmware Assisted dump memory structure. This structure is required for
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* registering future kernel dump with power firmware through rtas call.
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*
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* No disk dump option. Hence disk dump path string section is not included.
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*/
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struct fadump_mem_struct {
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struct fadump_section_header header;
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/* Kernel dump sections */
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struct fadump_section cpu_state_data;
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struct fadump_section hpte_region;
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struct fadump_section rmr_region;
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};
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/* Firmware-assisted dump configuration details. */
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struct fw_dump {
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unsigned long cpu_state_data_size;
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unsigned long hpte_region_size;
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unsigned long boot_memory_size;
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unsigned long reserve_dump_area_start;
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unsigned long reserve_dump_area_size;
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/* cmd line option during boot */
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unsigned long reserve_bootvar;
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int ibm_configure_kernel_dump;
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unsigned long fadump_enabled:1;
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unsigned long fadump_supported:1;
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unsigned long dump_active:1;
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unsigned long dump_registered:1;
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};
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extern int early_init_dt_scan_fw_dump(unsigned long node,
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const char *uname, int depth, void *data);
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extern int fadump_reserve_mem(void);
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extern int setup_fadump(void);
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extern int is_fadump_active(void);
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#else /* CONFIG_FA_DUMP */
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static inline int is_fadump_active(void) { return 0; }
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#endif
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#endif
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