linux-kernel - [RFC] arm64: kexec_file

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20160701051111.GL20774@linaro.org>
Date:	Fri, 1 Jul 2016 14:11:12 +0900
From:	AKASHI Takahiro <takahiro.akashi@...aro.org>
To:	ebiederm@...ssion.com, dyoung@...hat.com, bhe@...hat.com,
	vgoyal@...hat.com
Cc:	kexec@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, catalin.marinas@....com,
	will.deacon@....com
Subject: [RFC] arm64: kexec_file_load support

Hi,

I'm not sure whether there is any demand for kexec_file_load
support on arm64, but anyhow I'm working on this and now
my early prototype code does work fine.

There is, however, one essential issue:
While arm64 kernel requires a device tree blob to be set up
correctly at boot time, the current system call API doesn't
have this parameter.
    int kexec_file_load(int kernel_fd, int initrd_fd,
                        unsigned long cmdline_len, const char *cmdline_ptr,
                        unsigned long flags);

Should we invent a new system call, like kexec_file_load2,
and, if so, what kind of interface would be desired?

Thanks,
-Takahiro AKASHI