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authorVivek Goyal <vgoyal@redhat.com>2014-08-08 23:26:04 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 00:57:32 +0200
commit12db5562e0352986a265841638482b84f3a6899b (patch)
tree533100da8331131037128616b3f9d501c07a6def /arch/mips
parentpurgatory: core purgatory functionality (diff)
downloadlinux-12db5562e0352986a265841638482b84f3a6899b.tar.xz
linux-12db5562e0352986a265841638482b84f3a6899b.zip
kexec: load and relocate purgatory at kernel load time
Load purgatory code in RAM and relocate it based on the location. Relocation code has been inspired by module relocation code and purgatory relocation code in kexec-tools. Also compute the checksums of loaded kexec segments and store them in purgatory. Arch independent code provides this functionality so that arch dependent bootloaders can make use of it. Helper functions are provided to get/set symbol values in purgatory which are used by bootloaders later to set things like stack and entry point of second kernel etc. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Dave Young <dyoung@redhat.com> Cc: WANG Chao <chaowang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/Kconfig2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 900c7e5333b6..df51e78a72cc 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2396,6 +2396,8 @@ source "kernel/Kconfig.preempt"
config KEXEC
bool "Kexec system call"
+ select CRYPTO
+ select CRYPTO_SHA256
help
kexec is a system call that implements the ability to shutdown your
current kernel, and to start another kernel. It is like a reboot