[PATCH v2] s390x: add kdump sysconfig option to use the kexec_file_load() syscall

[Lianbo Jiang]

Currently, kernel has supported the kexec_file_load() syscall on s390x,
so I follow this commit:
6a20bd54473e ("kdump-lib: switch to the kexec_file_load() syscall on
x86_64 by default")

And also enable the kexec_file_load() syscall for kdump on s390x by
default.

Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt;
---
Changes since v1:
[1] Remove the change for arm64 because fedora kernel doesn't support
the file load.

 kdump.sysconfig.s390x | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
index abd45a2f332d..75ff2a25f37b 100644
--- a/kdump.sysconfig.s390x
+++ b/kdump.sysconfig.s390x
@@ -41,3 +41,9 @@ KDUMP_IMG="vmlinuz"
 
 #What is the images extension.  Relocatable kernels don't have one
 KDUMP_IMG_EXT=""
+
+# Using kexec file based syscall by default
+#
+# Here, the "on" is the only valid value to enable the kexec file load and
+# anything else is equal to the "off"(disable).
+KDUMP_FILE_LOAD="on"
-- 
2.17.1

[Kairui Song]

On Thu, Apr 9, 2020 at 4:25 PM Lianbo Jiang <lijiang(a)redhat.com&gt; wrote:
>  Currently, kernel has supported the kexec_file_load() syscall on s390x,
>  so I follow this commit:
>  6a20bd54473e ("kdump-lib: switch to the kexec_file_load() syscall on
>  x86_64 by default")
>
>  And also enable the kexec_file_load() syscall for kdump on s390x by
>  default.
>
>  Signed-off-by: Lianbo Jiang <lijiang(a)redhat.com&gt;
>  ---
>  Changes since v1:
>  [1] Remove the change for arm64 because fedora kernel doesn't support
>  the file load.
>
>   kdump.sysconfig.s390x | 6 ++++++
>   1 file changed, 6 insertions(+)
>
>  diff --git a/kdump.sysconfig.s390x b/kdump.sysconfig.s390x
>  index abd45a2f332d..75ff2a25f37b 100644
>  --- a/kdump.sysconfig.s390x
>  +++ b/kdump.sysconfig.s390x
>  @@ -41,3 +41,9 @@ KDUMP_IMG="vmlinuz"
>
>   #What is the images extension.  Relocatable kernels don't have one
>   KDUMP_IMG_EXT=""
>  +
>  +# Using kexec file based syscall by default
>  +#
>  +# Here, the "on" is the only valid value to enable the kexec file load and
>  +# anything else is equal to the "off"(disable).
>  +KDUMP_FILE_LOAD="on"
>  --
>  2.17.1 
Assume it's tested:
Acked-by: Kairui Song <kasong(a)redhat.com&gt;

-- 
Best Regards,
Kairui Song