linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: Heiko Carstens <hca@linux.ibm.com>
To: Marco Elver <elver@google.com>, Alexander Potapenko <glider@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	kasan-dev@googlegroups.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH 4/4] s390: add kfence region to pagetable dumper
Date: Wed, 28 Jul 2021 21:02:54 +0200	[thread overview]
Message-ID: <20210728190254.3921642-5-hca@linux.ibm.com> (raw)
In-Reply-To: <20210728190254.3921642-1-hca@linux.ibm.com>

From: Sven Schnelle <svens@linux.ibm.com>

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/mm/dump_pagetables.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index e40a30647d99..07dcec925bf4 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -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 +22,8 @@ enum address_markers_idx {
 	IDENTITY_BEFORE_END_NR,
 	KERNEL_START_NR,
 	KERNEL_END_NR,
+	KFENCE_START_NR,
+	KFENCE_END_NR,
 	IDENTITY_AFTER_NR,
 	IDENTITY_AFTER_END_NR,
 #ifdef CONFIG_KASAN
@@ -40,6 +43,10 @@ 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 +255,9 @@ 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 +272,10 @@ 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);
-- 
2.25.1



      parent reply	other threads:[~2021-07-28 19:03 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-28 19:02 [PATCH 0/4] s390: add kfence support Heiko Carstens
2021-07-28 19:02 ` [PATCH 1/4] s390/mm: implement set_memory_4k() Heiko Carstens
2021-07-28 19:02 ` [PATCH 2/4] kfence: add function to mask address bits Heiko Carstens
2021-07-28 19:28   ` Christian Borntraeger
2021-07-29  7:48   ` Marco Elver
2021-07-29 12:25     ` Heiko Carstens
2021-07-29 12:27       ` Marco Elver
2021-07-29 12:43   ` Alexander Potapenko
2021-07-29 13:47     ` Sven Schnelle
2021-07-29 13:59       ` Alexander Potapenko
2021-07-28 19:02 ` [PATCH 3/4] s390: add support for KFENCE Heiko Carstens
2021-07-28 19:02 ` Heiko Carstens [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210728190254.3921642-5-hca@linux.ibm.com \
    --to=hca@linux.ibm.com \
    --cc=borntraeger@de.ibm.com \
    --cc=elver@google.com \
    --cc=glider@google.com \
    --cc=gor@linux.ibm.com \
    --cc=kasan-dev@googlegroups.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-s390@vger.kernel.org \
    --cc=svens@linux.ibm.com \
    --subject='Re: [PATCH 4/4] s390: add kfence region to pagetable dumper' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).