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From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
	dyoung@redhat.com, stewart@linux.vnet.ibm.com,
	bauerman@linux.vnet.ibm.com
Subject: [PATCH v11 7/8] powerpc/kexec: Enable kexec_file_load() syscall
Date: Tue, 29 Nov 2016 23:45:53 +1100	[thread overview]
Message-ID: <1480423554-6411-8-git-send-email-mpe@ellerman.id.au> (raw)
In-Reply-To: <1480423554-6411-1-git-send-email-mpe@ellerman.id.au>

From: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>

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.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 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 --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 6cb59c6e5ba4..897d0f14447d 100644
--- a/arch/powerpc/Kconfig
+++ b/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 --git a/arch/powerpc/include/asm/systbl.h b/arch/powerpc/include/asm/systbl.h
index 2fc5d4db503c..4b369d83fe9c 100644
--- a/arch/powerpc/include/asm/systbl.h
+++ b/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 --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h
index e8cdfec8d512..eb1acee91a20 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/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 --git a/arch/powerpc/include/uapi/asm/unistd.h b/arch/powerpc/include/uapi/asm/unistd.h
index e9f5f41aa55a..2f26335a3c42 100644
--- a/arch/powerpc/include/uapi/asm/unistd.h
+++ b/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_ */
-- 
2.7.4

  parent reply	other threads:[~2016-11-29 12:46 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-29 12:45 [PATCH v11 0/8] powerpc: Implement kexec_file_load() Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 1/8] kexec_file: Allow arch-specific memory walking for kexec_add_buffer Michael Ellerman
2016-11-30 19:51   ` [v11, " Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 2/8] kexec_file: Change kexec_add_buffer to take kexec_buf as argument Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 3/8] kexec_file: Factor out kexec_locate_mem_hole from kexec_add_buffer Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 4/8] powerpc: Change places using CONFIG_KEXEC to use CONFIG_KEXEC_CORE instead Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 5/8] powerpc: Add support code for kexec_file_load() Michael Ellerman
2016-11-29 12:45 ` [PATCH v11 6/8] powerpc: Add purgatory for kexec_file_load() implementation Michael Ellerman
2016-11-29 12:45 ` Michael Ellerman [this message]
2016-11-29 12:45 ` [PATCH v11 8/8] powerpc: Enable CONFIG_KEXEC_FILE in powerpc server defconfigs Michael Ellerman
2016-11-29 21:45 ` [PATCH v11 0/8] powerpc: Implement kexec_file_load() Andrew Morton
2016-11-29 22:17   ` Thiago Jung Bauermann
2016-11-30  4:52   ` Michael Ellerman
2016-11-30 13:03     ` Mimi Zohar
2016-12-01  1:14       ` Mimi Zohar

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