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From: Michal Suchanek <msuchanek@suse.de>
To: kexec@lists.infradead.org
Cc: Tony Jones <tonyj@suse.com>, Dave Young <dyoung@redhat.com>,
	Michal Suchanek <msuchanek@suse.de>,
	Petr Tesarik <ptesarik@suse.cz>,
	horms@verge.net.au
Subject: [PATCH v4 5/5] kexec: document -s, -c and -a options.
Date: Tue,  6 Mar 2018 14:15:56 +0100	[thread overview]
Message-ID: <6a8aa85dbaa781348890362aa2d8589c91b8b458.1520342150.git.msuchanek@suse.de> (raw)
In-Reply-To: <e810acd57d9fc2d7ba3b0e95d470c20de9948462.1520342150.git.msuchanek@suse.de>
In-Reply-To: <20180302091706.GA15374@dhcp-128-65.nay.redhat.com>

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
---
 kexec/kexec.8 | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/kexec/kexec.8 b/kexec/kexec.8
index e0131b4ea827..b3543db3f413 100644
--- a/kexec/kexec.8
+++ b/kexec/kexec.8
@@ -144,6 +144,21 @@ Load the new kernel for use on panic.
 Specify that the new kernel is of this
 .I type.
 .TP
+.BI \-s\ (\-\-kexec-file-syscall)
+Specify that the new KEXEC_FILE_LOAD syscall should be used exclusively.
+.TP
+.BI \-c\ (\-\-kexec-syscall)
+Specify that the old KEXEC_LOAD syscall should be used exclusively (the default).
+.TP
+.BI \-a\ (\-\-kexec-syscall-auto)
+Try the new simpler KEXEC_FILE_LOAD syscall first and if it is not supported
+fall back to the old KEXEC_LOAD interface.
+
+There is no one single interface that always works. KEXEC_FILE_LOAD is required
+on systems that use locked-down secure boot to verify the kernel signature.
+KEXEC_LOAD is required for some kernel image formats and on architectures that
+do not support KEXEC_FILE_LOAD.
+.TP
 .B \-u\ (\-\-unload)
 Unload the current
 .B kexec
-- 
2.13.6


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  parent reply	other threads:[~2018-03-06 13:16 UTC|newest]

Thread overview: 85+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-26 12:00 [PATCH 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Michal Suchanek
2018-02-26 12:00 ` [PATCH 2/5] kexec: do not special-case the -s option Michal Suchanek
2018-03-02 12:36   ` Simon Horman
2018-03-02 13:38     ` Michal Suchánek
2018-03-05  6:38       ` Simon Horman
2018-02-26 12:00 ` [PATCH 3/5] kexec: add option to revert -s Michal Suchanek
2018-02-26 12:00 ` [PATCH 4/5] kexec: fallback to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Michal Suchanek
2018-02-28 13:05   ` Michal Suchánek
2018-03-02  9:17   ` Dave Young
2018-03-05 17:49     ` Michal Suchánek
2018-03-06 13:15     ` [PATCH v4 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Michal Suchanek
2018-03-06 13:15     ` [PATCH v4 2/5] kexec: do not special-case the -s option Michal Suchanek
2018-03-15 10:38       ` Simon Horman
2018-03-15 11:13         ` Michal Suchánek
2018-03-16 11:20           ` Simon Horman
2018-03-16 11:38             ` Michal Suchánek
2018-03-16 11:47               ` Simon Horman
2018-03-06 13:15     ` [PATCH v4 3/5] kexec: add option to revert -s Michal Suchanek
2018-03-06 13:15     ` [PATCH v4 4/5] kexec: add option to fall back to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Michal Suchanek
2018-03-13 17:30       ` Tony Jones
2018-03-14  3:44         ` Dave Young
2018-03-14  3:21       ` Dave Young
2018-03-15 11:06         ` Michal Suchánek
2018-03-16  6:45           ` Dave Young
2018-03-16 11:44             ` Michal Suchánek
2018-03-14  3:22       ` Dave Young
2018-03-14  7:23         ` Michal Suchánek
2018-03-14  7:48           ` Dave Young
2018-03-06 13:15     ` Michal Suchanek [this message]
2018-03-14  3:41       ` [PATCH v4 5/5] kexec: document -s, -c and -a options Dave Young
2018-03-14  7:25         ` Michal Suchánek
2018-03-14  7:50           ` Dave Young
2018-03-15 11:44             ` Michal Suchánek
2018-03-16  6:51               ` Dave Young
2018-03-16 16:01                 ` Michal Suchánek
2018-03-14  3:43       ` Dave Young
2018-03-15 11:18         ` Michal Suchánek
2018-03-20 15:56     ` [PATCH v5 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Michal Suchanek
2018-03-26  7:25       ` Simon Horman
2018-03-26  7:53         ` Dave Young
2018-03-26 18:17           ` Michal Suchánek
2018-03-27  9:39             ` Dave Young
2018-03-20 15:56     ` [PATCH v5 2/5] kexec: Fix option checks to take KEXEC_FILE_LOAD into account Michal Suchanek
2018-03-20 15:56     ` [PATCH v5 3/5] kexec: Do not special-case the -s option Michal Suchanek
2018-03-20 15:56     ` [PATCH v5 4/5] kexec: Add option to fall back to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Michal Suchanek
2018-03-26  9:08       ` Dave Young
2018-03-26  9:12         ` Dave Young
2018-03-26 17:38           ` Michal Suchánek
2018-03-26 18:52             ` Thiago Jung Bauermann
2018-03-26 19:07               ` Michal Suchánek
2018-03-27  9:59               ` Dave Young
2018-03-28 13:15                 ` [PATCH v6 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Michal Suchanek
2018-03-28 13:15                   ` [PATCH v6 2/5] kexec: Fix option checks to take KEXEC_FILE_LOAD into account Michal Suchanek
2018-03-28 13:15                   ` [PATCH v6 3/5] kexec: Do not special-case the -s option Michal Suchanek
2018-04-05 11:05                     ` Petr Tesarik
2018-04-09  8:38                       ` Bhupesh Sharma
2018-03-28 13:15                   ` [PATCH v6 4/5] kexec: Add option to revert -s Michal Suchanek
2018-03-28 13:15                   ` [PATCH v6 5/5] kexec: Add option to fall back to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Michal Suchanek
2018-03-28 13:15                   ` [PATCH 6/6] kexec: Document -s, -c and -a options in the man page Michal Suchanek
2018-03-30  6:29                   ` [PATCH v6 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Simon Horman
2018-03-30  8:00                     ` Dave Young
2018-03-30  8:46                       ` Simon Horman
2018-03-27 10:06             ` [PATCH v5 4/5] kexec: Add option to fall back to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Dave Young
2018-03-27 11:01               ` Michal Suchánek
2018-03-27 11:10                 ` Petr Tesarik
2018-03-28  0:53                 ` Dave Young
2018-03-28  7:42                   ` Simon Horman
2018-03-20 15:56     ` [PATCH v5 5/5] kexec: Document -s, -c and -a options Michal Suchanek
2018-03-02  9:24   ` [PATCH 4/5] kexec: fallback to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Dave Young
2018-03-02 12:32     ` Michal Suchánek
2018-03-02 12:46       ` Simon Horman
2018-03-02 13:28         ` Michal Suchánek
2018-03-02 13:32         ` [PATCH v3 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Michal Suchanek
2018-03-02 13:33         ` [PATCH v3 2/5] kexec: do not special-case the -s option Michal Suchanek
2018-03-02 13:33         ` [PATCH v3 3/5] kexec: add option to revert -s Michal Suchanek
2018-03-02 13:33         ` [PATCH v3 4/5] kexec: fallback to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Michal Suchanek
2018-03-02 13:55           ` Michal Suchánek
2018-03-05 12:52           ` [PATCH] kexec: add option to fall back " Michal Suchanek
2018-03-02 13:33         ` [PATCH v3 5/5] kexec: document -s, -c and -a options Michal Suchanek
2018-03-05  1:51         ` [PATCH 4/5] kexec: fallback to KEXEC_LOAD when KEXEC_FILE_LOAD is not supported Dave Young
2018-03-02 12:44   ` Simon Horman
2018-03-13 20:43     ` Michal Suchánek
2018-02-26 12:00 ` [PATCH 5/5] kexec: document -s and -c options Michal Suchanek
2018-03-02 12:34 ` [PATCH 1/5] kexec: Return -ENOSYS when kexec does not know how to call KEXEC_FILE_LOAD Simon Horman
2018-03-02 13:44   ` Michal Suchánek

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