Commit 8572f525 authored by Alexander Gordeev's avatar Alexander Gordeev
Browse files

s390/os_info: Store virtual memory layout 



This is a preparatory rework to allow uncoupling virtual
and physical addresses spaces.

The virtual memory layout will be read out by makedumpfile,
crash and other user tools for virtual address translation.

Acked-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
parent 88702793

arch/s390/include/asm/os_info.h

+8 −2
Original line number Diff line number Diff line
@@ -18,6 +18,12 @@ 
#define OS_INFO_REIPL_BLOCK	1

#define OS_INFO_FLAGS_ENTRY	2

#define OS_INFO_RESERVED	3

#define OS_INFO_IDENTITY_BASE	4

#define OS_INFO_KASLR_OFFSET	5

#define OS_INFO_KASLR_OFF_PHYS	6

#define OS_INFO_VMEMMAP		7

#define OS_INFO_AMODE31_START	8

#define OS_INFO_AMODE31_END	9



#define OS_INFO_FLAG_REIPL_CLEAR	(1UL << 0)
@@ -37,8 +43,8 @@ struct os_info { 
	u16	version_minor;

	u64	crashkernel_addr;

	u64	crashkernel_size;

	struct os_info_entry entry[4];

	u8	reserved[3984];

	struct os_info_entry entry[10];

	u8	reserved[3864];

} __packed;



void os_info_init(void);

arch/s390/kernel/os_info.c

+7 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <asm/checksum.h>

#include <asm/abs_lowcore.h>

#include <asm/os_info.h>

#include <asm/physmem_info.h>

#include <asm/maccess.h>

#include <asm/asm-offsets.h>
@@ -74,6 +75,12 @@ void __init os_info_init(void) 
	os_info.version_major = OS_INFO_VERSION_MAJOR;

	os_info.version_minor = OS_INFO_VERSION_MINOR;

	os_info.magic = OS_INFO_MAGIC;

	os_info_entry_add_val(OS_INFO_IDENTITY_BASE, __identity_base);

	os_info_entry_add_val(OS_INFO_KASLR_OFFSET, kaslr_offset());

	os_info_entry_add_val(OS_INFO_KASLR_OFF_PHYS, __kaslr_offset_phys);

	os_info_entry_add_val(OS_INFO_VMEMMAP, (unsigned long)vmemmap);

	os_info_entry_add_val(OS_INFO_AMODE31_START, AMODE31_START);

	os_info_entry_add_val(OS_INFO_AMODE31_END, AMODE31_END);

	os_info.csum = os_info_csum(&os_info);

	abs_lc = get_abs_lowcore();

	abs_lc->os_info = __pa(&os_info);