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s390/mm,ptdump: add couple of additional markers

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Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
[hca@linux.ibm.com: add more markers, rename some markers]
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2020-09-11 12:51:59 +02:00
parent d411e3c674
commit e670e64af1
3 changed files with 24 additions and 5 deletions
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1
arch/s390/include/asm/pgtable.h
View file

@ -89,6 +89,7 @@ extern unsigned long VMALLOC_START;
extern unsigned long VMALLOC_END;
#define VMALLOC_DEFAULT_SIZE ((128UL << 30) - MODULES_LEN)
extern struct page *vmemmap;
extern unsigned long vmemmap_size;
#define VMEM_MAX_PHYS ((unsigned long) vmemmap)

2
arch/s390/kernel/setup.c
View file

@ -119,6 +119,7 @@ EXPORT_SYMBOL(VMALLOC_END);
struct page *vmemmap;
EXPORT_SYMBOL(vmemmap);
unsigned long vmemmap_size;
unsigned long MODULES_VADDR;
unsigned long MODULES_END;
@ -589,6 +590,7 @@ static void __init setup_memory_end(void)
memory_end = min(memory_end, KASAN_SHADOW_START);
vmemmap = max(vmemmap, (struct page *)KASAN_SHADOW_END);
#endif
vmemmap_size = SECTION_ALIGN_UP(memory_end / PAGE_SIZE) * sizeof(struct page);
max_pfn = max_low_pfn = PFN_DOWN(memory_end);
memblock_remove(memory_end, ULONG_MAX);

26
arch/s390/mm/dump_pagetables.c
View file

@ -17,29 +17,41 @@ struct addr_marker {
};
enum address_markers_idx {
IDENTITY_NR = 0,
IDENTITY_BEFORE_NR = 0,
IDENTITY_BEFORE_END_NR,
KERNEL_START_NR,
KERNEL_END_NR,
IDENTITY_AFTER_NR,
IDENTITY_AFTER_END_NR,
#ifdef CONFIG_KASAN
KASAN_SHADOW_START_NR,
KASAN_SHADOW_END_NR,
#endif
VMEMMAP_NR,
VMEMMAP_END_NR,
VMALLOC_NR,
VMALLOC_END_NR,
MODULES_NR,
MODULES_END_NR,
};
static struct addr_marker address_markers[] = {
[IDENTITY_NR] = {0, "Identity Mapping"},
[IDENTITY_BEFORE_NR] = {0, "Identity Mapping Start"},
[IDENTITY_BEFORE_END_NR] = {(unsigned long)_stext, "Identity Mapping End"},
[KERNEL_START_NR] = {(unsigned long)_stext, "Kernel Image Start"},
[KERNEL_END_NR] = {(unsigned long)_end, "Kernel Image End"},
[IDENTITY_AFTER_NR] = {(unsigned long)_end, "Identity Mapping Start"},
[IDENTITY_AFTER_END_NR] = {0, "Identity Mapping End"},
#ifdef CONFIG_KASAN
[KASAN_SHADOW_START_NR] = {KASAN_SHADOW_START, "Kasan Shadow Start"},
[KASAN_SHADOW_END_NR] = {KASAN_SHADOW_END, "Kasan Shadow End"},
#endif
[VMEMMAP_NR] = {0, "vmemmap Area"},
[VMALLOC_NR] = {0, "vmalloc Area"},
[MODULES_NR] = {0, "Modules Area"},
[VMEMMAP_NR] = {0, "vmemmap Area Start"},
[VMEMMAP_END_NR] = {0, "vmemmap Area End"},
[VMALLOC_NR] = {0, "vmalloc Area Start"},
[VMALLOC_END_NR] = {0, "vmalloc Area End"},
[MODULES_NR] = {0, "Modules Area Start"},
[MODULES_END_NR] = {0, "Modules Area End"},
{ -1, NULL }
};
@ -225,9 +237,13 @@ static int pt_dump_init(void)
*/
max_addr = (S390_lowcore.kernel_asce & _REGION_ENTRY_TYPE_MASK) >> 2;
max_addr = 1UL << (max_addr * 11 + 31);
address_markers[IDENTITY_AFTER_END_NR].start_address = memory_end;
address_markers[MODULES_NR].start_address = MODULES_VADDR;
address_markers[MODULES_END_NR].start_address = MODULES_END;
address_markers[VMEMMAP_NR].start_address = (unsigned long) vmemmap;
address_markers[VMEMMAP_END_NR].start_address = (unsigned long)vmemmap + vmemmap_size;
address_markers[VMALLOC_NR].start_address = VMALLOC_START;
address_markers[VMALLOC_END_NR].start_address = VMALLOC_END;
if (IS_ENABLED(CONFIG_PTDUMP_DEBUGFS))
debugfs_create_file("kernel_page_tables", 0400, NULL, NULL, &ptdump_fops);
return 0;