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From: takahiro.akashi@linaro.org (AKASHI Takahiro)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v22 7/8] arm64: kdump: update a kernel doc
Date: Tue, 12 Jul 2016 14:05:13 +0900	[thread overview]
Message-ID: <20160712050514.22307-8-takahiro.akashi@linaro.org> (raw)
In-Reply-To: <20160712050514.22307-1-takahiro.akashi@linaro.org>

This patch adds arch specific descriptions about kdump usage on arm64
to kdump.txt.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
---
 Documentation/kdump/kdump.txt | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 88ff63d..c090531 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -18,7 +18,7 @@ memory image to a dump file on the local disk, or across the network to
 a remote system.
 
 Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64,
-s390x and arm architectures.
+s390x, arm and arm64 architectures.
 
 When the system kernel boots, it reserves a small section of memory for
 the dump-capture kernel. This ensures that ongoing Direct Memory Access
@@ -249,6 +249,13 @@ Dump-capture kernel config options (Arch Dependent, arm)
 
     AUTO_ZRELADDR=y
 
+Dump-capture kernel config options (Arch Dependent, arm64)
+----------------------------------------------------------
+
+- Please note that kvm of the dump-capture kernel will not be enabled
+  on non-VHE systems even if it is configured. This is because the CPU
+  cannot be reset to EL2 on panic.
+
 Extended crashkernel syntax
 ===========================
 
@@ -305,6 +312,8 @@ Boot into System Kernel
    kernel will automatically locate the crash kernel image within the
    first 512MB of RAM if X is not given.
 
+   On arm64, use "crashkernel=Y[@X]".  Note that the start address of
+   the kernel, X if explicitly specified, must be aligned to 2MiB (0x200000).
 
 Load the Dump-capture Kernel
 ============================
@@ -327,6 +336,8 @@ For s390x:
 	- Use image or bzImage
 For arm:
 	- Use zImage
+For arm64:
+	- Use vmlinux or Image
 
 If you are using a uncompressed vmlinux image then use following command
 to load dump-capture kernel.
@@ -370,6 +381,9 @@ For s390x:
 For arm:
 	"1 maxcpus=1 reset_devices"
 
+For arm64:
+	"1 maxcpus=1 reset_devices"
+
 Notes on loading the dump-capture kernel:
 
 * By default, the ELF headers are stored in ELF64 format to support
-- 
2.9.0

  parent reply	other threads:[~2016-07-12  5:05 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-12  5:05 [PATCH v22 0/8] arm64: add kdump support AKASHI Takahiro
2016-07-12  5:05 ` [PATCH v22 1/8] arm64: kdump: reserve memory for crash dump kernel AKASHI Takahiro
2016-07-13  9:12   ` Suzuki K Poulose
2016-07-13 15:42     ` AKASHI Takahiro
2016-07-19  9:39   ` Dennis Chen
2016-07-19 10:28     ` AKASHI Takahiro
2016-07-19 10:41       ` Dennis Chen
2016-07-19 12:48         ` Mark Salter
2016-07-19 13:27           ` Mark Rutland
2016-07-20  2:17             ` AKASHI Takahiro
2016-07-20  3:48             ` Dennis Chen
2016-07-19 23:34           ` AKASHI Takahiro
2016-07-12  5:05 ` [PATCH v22 2/8] arm64: limit memory regions based on DT property, usable-memory-range AKASHI Takahiro
2016-07-18 18:04   ` James Morse
2016-07-19  8:35     ` AKASHI Takahiro
2016-07-19 10:06       ` Dennis Chen
2016-07-19 11:01         ` AKASHI Takahiro
2016-07-20  3:39           ` Dennis Chen
2016-07-20  4:22             ` AKASHI Takahiro
2016-07-20  4:36               ` Dennis Chen
2016-07-21  0:57     ` AKASHI Takahiro
2016-07-22 13:55       ` James Morse
2016-07-25  5:27         ` AKASHI Takahiro
2016-08-04  6:21           ` AKASHI Takahiro
2016-08-09 16:22             ` James Morse
2016-07-12  5:05 ` [PATCH v22 3/8] arm64: kdump: implement machine_crash_shutdown() AKASHI Takahiro
2016-07-13  9:32   ` Suzuki K Poulose
2016-07-13 16:00     ` AKASHI Takahiro
2016-07-12  5:05 ` [PATCH v22 4/8] arm64: kdump: add kdump support AKASHI Takahiro
2016-07-12  5:05 ` [PATCH v22 5/8] arm64: kdump: add VMCOREINFO's for user-space coredump tools AKASHI Takahiro
2016-07-12  5:05 ` [PATCH v22 6/8] arm64: kdump: enable kdump in the arm64 defconfig AKASHI Takahiro
2016-07-12  5:05 ` AKASHI Takahiro [this message]
2016-07-12  5:05 ` [PATCH v22 8/8] Documentation: dt: chosen properties for arm64 kdump AKASHI Takahiro
2016-07-12 10:07   ` Mark Rutland
2016-07-13 15:14     ` AKASHI Takahiro

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