Commit 50787755 authored by Alexander Gordeev's avatar Alexander Gordeev Committed by Vasily Gorbik
Browse files

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: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 4df29d2b

arch/s390/mm/dump_pagetables.c

+7 −0
Original line number Diff line number Diff line
@@ -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>
@@ -41,6 +42,8 @@ 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[] = {
@@ -66,6 +69,8 @@ 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 }

};
@@ -284,6 +289,8 @@ static int pt_dump_init(void) 
	address_markers[AMODE31_END_NR].start_address = __eamode31;

	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;