All of lore.kernel.org
 help / color / mirror / Atom feed
From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
To: akpm@linux-foundation.org
Cc: linux-s390@vger.kernel.org, mahesh@linux.vnet.ibm.com,
	heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org,
	ebiederm@xmission.com, schwidefsky@de.ibm.com,
	kexec@lists.infradead.org, vgoyal@redhat.com
Subject: [patch 2/2] s390: Export vmcoreinfo note
Date: Tue, 20 Sep 2011 16:34:02 +0200	[thread overview]
Message-ID: <20110920143436.224880681@linux.vnet.ibm.com> (raw)
In-Reply-To: 20110920143400.776127689@linux.vnet.ibm.com

[-- Attachment #1: s390-kdump-arch-vmcoreinfo.patch --]
[-- Type: text/plain, Size: 1596 bytes --]

From: Michael Holzheu <holzheu@linux.vnet.ibm.com>

This patch defines for s390 an ABI defined pointer to the vmcoreinfo note at
a well known address. With this patch tools are able to find this information
in dumps created by stand-alone or hypervisor dump tools.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
---
 arch/s390/include/asm/lowcore.h |    3 ++-
 arch/s390/kernel/setup.c        |    8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -287,7 +287,8 @@ struct _lowcore {
 	 */
 	__u64	ipib;				/* 0x0e00 */
 	__u32	ipib_checksum;			/* 0x0e08 */
-	__u8	pad_0x0e0c[0x0f00-0x0e0c];	/* 0x0e0c */
+	__u64	vmcore_info;			/* 0x0e0c */
+	__u8	pad_0x0e14[0x0f00-0x0e14];	/* 0x0e14 */
 
 	/* Extended facility list */
 	__u64	stfle_fac_list[32];		/* 0x0f00 */
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -559,6 +559,13 @@ static void __init setup_restart_psw(voi
 	copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
 }
 
+static void __init setup_vmcoreinfo(void)
+{
+	unsigned long ptr = paddr_vmcoreinfo_note();
+
+	copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr));
+}
+
 #ifdef CONFIG_CRASH_DUMP
 
 /*
@@ -1019,6 +1026,7 @@ setup_arch(char **cmdline_p)
 	reserve_crashkernel();
 	setup_memory();
 	setup_resources();
+	setup_vmcoreinfo();
 	setup_restart_psw();
 	setup_lowcore();
 


_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
To: akpm@linux-foundation.org
Cc: vgoyal@redhat.com, ebiederm@xmission.com,
	mahesh@linux.vnet.ibm.com, schwidefsky@de.ibm.com,
	heiko.carstens@de.ibm.com, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [patch 2/2] s390: Export vmcoreinfo note
Date: Tue, 20 Sep 2011 16:34:02 +0200	[thread overview]
Message-ID: <20110920143436.224880681@linux.vnet.ibm.com> (raw)
In-Reply-To: 20110920143400.776127689@linux.vnet.ibm.com

[-- Attachment #1: s390-kdump-arch-vmcoreinfo.patch --]
[-- Type: text/plain, Size: 1451 bytes --]

From: Michael Holzheu <holzheu@linux.vnet.ibm.com>

This patch defines for s390 an ABI defined pointer to the vmcoreinfo note at
a well known address. With this patch tools are able to find this information
in dumps created by stand-alone or hypervisor dump tools.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
---
 arch/s390/include/asm/lowcore.h |    3 ++-
 arch/s390/kernel/setup.c        |    8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -287,7 +287,8 @@ struct _lowcore {
 	 */
 	__u64	ipib;				/* 0x0e00 */
 	__u32	ipib_checksum;			/* 0x0e08 */
-	__u8	pad_0x0e0c[0x0f00-0x0e0c];	/* 0x0e0c */
+	__u64	vmcore_info;			/* 0x0e0c */
+	__u8	pad_0x0e14[0x0f00-0x0e14];	/* 0x0e14 */
 
 	/* Extended facility list */
 	__u64	stfle_fac_list[32];		/* 0x0f00 */
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -559,6 +559,13 @@ static void __init setup_restart_psw(voi
 	copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
 }
 
+static void __init setup_vmcoreinfo(void)
+{
+	unsigned long ptr = paddr_vmcoreinfo_note();
+
+	copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr));
+}
+
 #ifdef CONFIG_CRASH_DUMP
 
 /*
@@ -1019,6 +1026,7 @@ setup_arch(char **cmdline_p)
 	reserve_crashkernel();
 	setup_memory();
 	setup_resources();
+	setup_vmcoreinfo();
 	setup_restart_psw();
 	setup_lowcore();
 

  parent reply	other threads:[~2011-09-20 14:34 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-20 14:34 [patch 0/2] kdump: Initialize vmcoreinfo note at startup Michael Holzheu
2011-09-20 14:34 ` Michael Holzheu
2011-09-20 14:34 ` [patch 1/2] " Michael Holzheu
2011-09-20 14:34   ` Michael Holzheu
2011-09-20 22:59   ` Andrew Morton
2011-09-20 22:59     ` Andrew Morton
2011-09-21  8:49     ` Michael Holzheu
2011-09-21  8:49       ` Michael Holzheu
2011-09-20 14:34 ` Michael Holzheu [this message]
2011-09-20 14:34   ` [patch 2/2] s390: Export vmcoreinfo note Michael Holzheu
2011-09-20 23:00 ` [patch 0/2] kdump: Initialize vmcoreinfo note at startup Andrew Morton
2011-09-20 23:00   ` Andrew Morton
  -- strict thread matches above, loose matches on Subject: below --
2011-09-09 10:26 Michael Holzheu
2011-09-09 10:27 ` [patch 2/2] s390: Export vmcoreinfo note Michael Holzheu
2011-09-09 10:27   ` Michael Holzheu

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=20110920143436.224880681@linux.vnet.ibm.com \
    --to=holzheu@linux.vnet.ibm.com \
    --cc=akpm@linux-foundation.org \
    --cc=ebiederm@xmission.com \
    --cc=heiko.carstens@de.ibm.com \
    --cc=kexec@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-s390@vger.kernel.org \
    --cc=mahesh@linux.vnet.ibm.com \
    --cc=schwidefsky@de.ibm.com \
    --cc=vgoyal@redhat.com \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.