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s390/mm,ptdump: add real memory copy page markers 

Add "Real Memory Copy Area Start" and "Real Memory Copy Area End"
markers that fence the page used for real memory copying.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Alexander Gordeev 2022-09-04 10:32:32 +02:00 committed by Vasily Gorbik
parent 2f0e8aae26
commit c0ceb94403
1 changed files with 7 additions and 0 deletions
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7
arch/s390/mm/dump_pagetables.c
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@ -11,6 +11,7 @@
#include <asm/abs_lowcore.h>
#include <asm/nospec-branch.h>
#include <asm/sections.h>
#include <asm/maccess.h>
static unsigned long max_addr;
@ -44,6 +45,8 @@ enum address_markers_idx {
MODULES_END_NR,
ABS_LOWCORE_NR,
ABS_LOWCORE_END_NR,
MEMCPY_REAL_NR,
MEMCPY_REAL_END_NR,
};
static struct addr_marker address_markers[] = {
@ -71,6 +74,8 @@ static struct addr_marker address_markers[] = {
[MODULES_END_NR] = {0, "Modules Area End"},
[ABS_LOWCORE_NR] = {0, "Lowcore Area Start"},
[ABS_LOWCORE_END_NR] = {0, "Lowcore Area End"},
[MEMCPY_REAL_NR] = {0, "Real Memory Copy Area Start"},
[MEMCPY_REAL_END_NR] = {0, "Real Memory Copy Area End"},
{ -1, NULL }
};
@ -291,6 +296,8 @@ static int pt_dump_init(void)
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[MEMCPY_REAL_NR].start_address = __memcpy_real_area;
address_markers[MEMCPY_REAL_END_NR].start_address = __memcpy_real_area + PAGE_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;