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s390/smp,ptdump: add absolute lowcore markers 

Add "Lowcore Area Start" and "Lowcore Area End" markers
that fence pages where absolute lowcore resides.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-07-20 08:32:13 +02:00
parent 7d06fed77b
commit e409b7f191
1 changed files with 7 additions and 0 deletions
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7
arch/s390/mm/dump_pagetables.c
View File

@ -8,6 +8,7 @@
#include <linux/kasan.h>
#include <asm/ptdump.h>
#include <asm/kasan.h>
#include <asm/abs_lowcore.h>
#include <asm/nospec-branch.h>
#include <asm/sections.h>
@ -39,6 +40,8 @@ enum address_markers_idx {
VMALLOC_END_NR,
MODULES_NR,
MODULES_END_NR,
ABS_LOWCORE_NR,
ABS_LOWCORE_END_NR,
};
static struct addr_marker address_markers[] = {
@ -62,6 +65,8 @@ static struct addr_marker address_markers[] = {
[VMALLOC_END_NR] = {0, "vmalloc Area End"},
[MODULES_NR] = {0, "Modules Area Start"},
[MODULES_END_NR] = {0, "Modules Area End"},
[ABS_LOWCORE_NR] = {0, "Lowcore Area Start"},
[ABS_LOWCORE_END_NR] = {0, "Lowcore Area End"},
{ -1, NULL }
};
@ -278,6 +283,8 @@ static int pt_dump_init(void)
address_markers[IDENTITY_AFTER_END_NR].start_address = ident_map_size;
address_markers[MODULES_NR].start_address = MODULES_VADDR;
address_markers[MODULES_END_NR].start_address = MODULES_END;
address_markers[ABS_LOWCORE_NR].start_address = __abs_lowcore;
address_markers[ABS_LOWCORE_END_NR].start_address = __abs_lowcore + ABS_LOWCORE_MAP_SIZE;
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;