leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

s390: add kfence region to pagetable dumper

Browse Source 
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20210728190254.3921642-5-hca@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2021-07-28 21:02:54 +02:00 committed by Heiko Carstens
parent e41ba1115a
commit d6de72cf92
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/s390/mm/dump_pagetables.c
View File

@ -4,6 +4,7 @@
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/mm.h>
#include <linux/kfence.h>
#include <linux/kasan.h>
#include <asm/ptdump.h>
#include <asm/kasan.h>
@ -21,6 +22,10 @@ enum address_markers_idx {
IDENTITY_BEFORE_END_NR,
KERNEL_START_NR,
KERNEL_END_NR,
#ifdef CONFIG_KFENCE
KFENCE_START_NR,
KFENCE_END_NR,
#endif
IDENTITY_AFTER_NR,
IDENTITY_AFTER_END_NR,
#ifdef CONFIG_KASAN
@ -40,6 +45,10 @@ static struct addr_marker address_markers[] = {
[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"},
#ifdef CONFIG_KFENCE
[KFENCE_START_NR] = {0, "KFence Pool Start"},
[KFENCE_END_NR] = {0, "KFence Pool End"},
#endif
[IDENTITY_AFTER_NR] = {(unsigned long)_end, "Identity Mapping Start"},
[IDENTITY_AFTER_END_NR] = {0, "Identity Mapping End"},
#ifdef CONFIG_KASAN
@ -248,6 +257,9 @@ static void sort_address_markers(void)
static int pt_dump_init(void)
{
#ifdef CONFIG_KFENCE
unsigned long kfence_start = (unsigned long)__kfence_pool;
#endif
/*
* Figure out the maximum virtual address being accessible with the
* kernel ASCE. We need this to keep the page table walker functions
@ -262,6 +274,10 @@ static int pt_dump_init(void)
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;
#ifdef CONFIG_KFENCE
address_markers[KFENCE_START_NR].start_address = kfence_start;
address_markers[KFENCE_END_NR].start_address = kfence_start + KFENCE_POOL_SIZE;
#endif
sort_address_markers();
#ifdef CONFIG_PTDUMP_DEBUGFS
debugfs_create_file("kernel_page_tables", 0400, NULL, NULL, &ptdump_fops);