The patch titled
Subject: powerpc/kexec: enable kexec_file_load() syscall
has been added to the -mm tree. Its filename is
powerpc-kexec-enable-kexec_file_load-syscall.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-kexec-enable-kexec_file_load-syscall.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-kexec-enable-kexec_file_load-syscall.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx>
Subject: powerpc/kexec: enable kexec_file_load() syscall
Define the Kconfig symbol so that the kexec_file_load() code can be
built, and wire up the syscall so that it can be called.
Link: http://lkml.kernel.org/r/1480423554-6411-8-git-send-email-mpe@xxxxxxxxxxxxxx
Signed-off-by: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Josh Sklar <sklar@xxxxxxxxxxxxxxxxxx>
Cc: Balbir Singh <bsingharora@xxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Stewart Smith <stewart@xxxxxxxxxxxxxxxxxx>
Cc: Mimi Zohar <zohar@xxxxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/Kconfig | 13 +++++++++++++
arch/powerpc/include/asm/systbl.h | 1 +
arch/powerpc/include/asm/unistd.h | 2 +-
arch/powerpc/include/uapi/asm/unistd.h | 1 +
4 files changed, 16 insertions(+), 1 deletion(-)
diff -puN arch/powerpc/Kconfig~powerpc-kexec-enable-kexec_file_load-syscall arch/powerpc/Kconfig
--- a/arch/powerpc/Kconfig~powerpc-kexec-enable-kexec_file_load-syscall
+++ a/arch/powerpc/Kconfig
@@ -455,6 +455,19 @@ config KEXEC
interface is strongly in flux, so no good recommendation can be
made.
+config KEXEC_FILE
+ bool "kexec file based system call"
+ select KEXEC_CORE
+ select BUILD_BIN2C
+ depends on PPC64
+ depends on CRYPTO=y
+ depends on CRYPTO_SHA256=y
+ help
+ This is a new version of the kexec system call. This call is
+ file based and takes in file descriptors as system call arguments
+ for kernel and initramfs as opposed to a list of segments as is the
+ case for the older kexec call.
+
config RELOCATABLE
bool "Build a relocatable kernel"
depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
diff -puN arch/powerpc/include/asm/systbl.h~powerpc-kexec-enable-kexec_file_load-syscall arch/powerpc/include/asm/systbl.h
--- a/arch/powerpc/include/asm/systbl.h~powerpc-kexec-enable-kexec_file_load-syscall
+++ a/arch/powerpc/include/asm/systbl.h
@@ -386,3 +386,4 @@ SYSCALL(mlock2)
SYSCALL(copy_file_range)
COMPAT_SYS_SPU(preadv2)
COMPAT_SYS_SPU(pwritev2)
+SYSCALL(kexec_file_load)
diff -puN arch/powerpc/include/asm/unistd.h~powerpc-kexec-enable-kexec_file_load-syscall arch/powerpc/include/asm/unistd.h
--- a/arch/powerpc/include/asm/unistd.h~powerpc-kexec-enable-kexec_file_load-syscall
+++ a/arch/powerpc/include/asm/unistd.h
@@ -12,7 +12,7 @@
#include <uapi/asm/unistd.h>
-#define NR_syscalls 382
+#define NR_syscalls 383
#define __NR__exit __NR_exit
diff -puN arch/powerpc/include/uapi/asm/unistd.h~powerpc-kexec-enable-kexec_file_load-syscall arch/powerpc/include/uapi/asm/unistd.h
--- a/arch/powerpc/include/uapi/asm/unistd.h~powerpc-kexec-enable-kexec_file_load-syscall
+++ a/arch/powerpc/include/uapi/asm/unistd.h
@@ -392,5 +392,6 @@
#define __NR_copy_file_range 379
#define __NR_preadv2 380
#define __NR_pwritev2 381
+#define __NR_kexec_file_load 382
#endif /* _UAPI_ASM_POWERPC_UNISTD_H_ */
_
Patches currently in -mm which might be from bauerman@xxxxxxxxxxxxxxxxxx are
kexec_file-allow-arch-specific-memory-walking-for-kexec_add_buffer.patch
kexec_file-change-kexec_add_buffer-to-take-kexec_buf-as-argument.patch
kexec_file-factor-out-kexec_locate_mem_hole-from-kexec_add_buffer.patch
powerpc-change-places-using-config_kexec-to-use-config_kexec_core-instead.patch
powerpc-add-support-code-for-kexec_file_load.patch
powerpc-add-purgatory-for-kexec_file_load-implementation.patch
powerpc-kexec-enable-kexec_file_load-syscall.patch
powerpc-enable-config_kexec_file-in-powerpc-server-defconfigs.patch
powerpc-ima-get-the-kexec-buffer-passed-by-the-previous-kernel.patch
powerpc-ima-send-the-kexec-buffer-to-the-next-kernel.patch
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