Commit ca986d7f authored by Hari Bathini's avatar Hari Bathini Committed by Michael Ellerman
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powerpc/fadump: move internal macros/definitions to a new header 



Though asm/fadump.h is meant to be used by other components dealing
with FADump, it also has macros/definitions internal to FADump code.
Move them to a new header file used within FADump code. This also
makes way for refactoring platform specific FADump code.

Signed-off-by: default avatarHari Bathini <hbathini@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/156821313134.5656.6597770626574392140.stgit@hbathini.in.ibm.com
parent 1fdfa4c6

arch/powerpc/include/asm/fadump-internal.h

0 → 100644
+86 −0
Original line number Diff line number Diff line 
/* 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



/*

 * 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 additional 64M

 * of memory to avoid OOM issue.

 */

#define MIN_BOOT_MEM	(((RMA_END < (0x1UL << 28)) ? (0x1UL << 28) : RMA_END) \

			+ (0x1UL << 26))



/* 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



#define FADUMP_CRASH_INFO_MAGIC		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 fad_crash_memory_ranges {

	unsigned long long	base;

	unsigned long long	size;

};



/* 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;

	unsigned long	hpte_region_size;

	unsigned long	boot_memory_size;



	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;

	unsigned long	nocma:1;

};



#endif /* _ASM_POWERPC_FADUMP_INTERNAL_H */

arch/powerpc/include/asm/fadump.h

+0 −71
Original line number Diff line number Diff line
@@ -11,34 +11,6 @@ 


#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))



/* 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)



/* Alignement per CMA requirement. */

#define FADUMP_CMA_ALIGNMENT	(PAGE_SIZE <<				\

			max_t(unsigned long, MAX_ORDER - 1, pageblock_order))



/* Firmware provided dump sections */

#define FADUMP_CPU_STATE_DATA	0x0001

#define FADUMP_HPTE_REGION	0x0002
@@ -47,11 +19,6 @@ 
/* 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
@@ -112,29 +79,6 @@ struct fadump_mem_struct { 
	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;

	unsigned long	nocma:1;

};



/*

 * Copy the ascii values for first 8 characters from a string into u64

 * variable at their respective indexes.
@@ -153,7 +97,6 @@ static inline u64 str_to_u64(const char *str) 
#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.
@@ -178,20 +121,6 @@ struct fadump_reg_entry { 
	__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;

};



struct fad_crash_memory_ranges {

	unsigned long long	base;

	unsigned long long	size;

};



extern int is_fadump_memory_area(u64 addr, ulong size);

extern int early_init_dt_scan_fw_dump(unsigned long node,

		const char *uname, int depth, void *data);

arch/powerpc/kernel/fadump.c

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 
#include <asm/prom.h>

#include <asm/rtas.h>

#include <asm/fadump.h>

#include <asm/fadump-internal.h>

#include <asm/setup.h>



static struct fw_dump fw_dump;

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