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authorAlexander Gordeev <agordeev@linux.ibm.com>2022-07-20 08:32:13 +0200
committerAlexander Gordeev <agordeev@linux.ibm.com>2022-07-28 18:05:24 +0200
commite409b7f19172a3c154de62de4baf32a2c25a375a (patch)
treeb0dfc4c6b80a0165f5023090066016b567c97328 /arch/s390
parents390/smp: rework absolute lowcore access (diff)
downloadlinux-e409b7f19172a3c154de62de4baf32a2c25a375a.tar.xz
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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>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/mm/dump_pagetables.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index 9f9af5298dd6..393d6ef4589e 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -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;