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authorVivek Goyal <vgoyal@redhat.com>2014-08-09 01:25:57 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 02:57:32 +0400
commitcb1052581e2bddd6096544f3f944f4e7fdad4c7f (patch)
treec802781e0c67685bfe062d9a04d09cdb4ff82aea /include/uapi/linux/kexec.h
parentf0895685c7fd8c938c91a9d8a6f7c11f22df58d2 (diff)
downloadlinux-cb1052581e2bddd6096544f3f944f4e7fdad4c7f.tar.xz
kexec: implementation of new syscall kexec_file_load
Previous patch provided the interface definition and this patch prvides implementation of new syscall. Previously segment list was prepared in user space. Now user space just passes kernel fd, initrd fd and command line and kernel will create a segment list internally. This patch contains generic part of the code. Actual segment preparation and loading is done by arch and image specific loader. Which comes in next patch. [akpm@linux-foundation.org: coding-style fixes] 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 'include/uapi/linux/kexec.h')
-rw-r--r--include/uapi/linux/kexec.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/kexec.h b/include/uapi/linux/kexec.h
index d6629d49a243..6925f5b42f89 100644
--- a/include/uapi/linux/kexec.h
+++ b/include/uapi/linux/kexec.h
@@ -13,6 +13,17 @@
#define KEXEC_PRESERVE_CONTEXT 0x00000002
#define KEXEC_ARCH_MASK 0xffff0000
+/*
+ * Kexec file load interface flags.
+ * KEXEC_FILE_UNLOAD : Unload already loaded kexec/kdump image.
+ * KEXEC_FILE_ON_CRASH : Load/unload operation belongs to kdump image.
+ * KEXEC_FILE_NO_INITRAMFS : No initramfs is being loaded. Ignore the initrd
+ * fd field.
+ */
+#define KEXEC_FILE_UNLOAD 0x00000001
+#define KEXEC_FILE_ON_CRASH 0x00000002
+#define KEXEC_FILE_NO_INITRAMFS 0x00000004
+
/* These values match the ELF architecture values.
* Unless there is a good reason that should continue to be the case.
*/