76 lines
2.7 KiB
Diff
76 lines
2.7 KiB
Diff
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commit 2e1ec106dc5aac951ba884ebe4cca036e9a2d45f
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Author: Sven Schnelle <svens@linux.ibm.com>
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Date: Thu Dec 16 12:43:56 2021 +0100
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s390: add support for --reuse-cmdline
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--reuse-cmdline reads the command line of the currently
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running kernel from /proc/cmdline and uses that for the
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kernel that should be kexec'd.
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Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
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Reviewed-by: Alexander Egorenkov <egorenar@linux.ibm.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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diff --git a/kexec/arch/s390/include/arch/options.h b/kexec/arch/s390/include/arch/options.h
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index 76044a301ceb3cca013f70dff330a8ad343d808a..c150244996c79165cf1e83e331f728432b752652 100644
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--- a/kexec/arch/s390/include/arch/options.h
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+++ b/kexec/arch/s390/include/arch/options.h
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@@ -1,9 +1,10 @@
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#ifndef KEXEC_ARCH_S390_OPTIONS_H
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#define KEXEC_ARCH_S390_OPTIONS_H
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-#define OPT_ARCH_MAX (OPT_MAX+0)
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-#define OPT_APPEND OPT_MAX+0
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-#define OPT_RAMDISK OPT_MAX+1
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+#define OPT_ARCH_MAX (OPT_MAX+0)
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+#define OPT_APPEND (OPT_MAX+0)
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+#define OPT_RAMDISK (OPT_MAX+1)
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+#define OPT_REUSE_CMDLINE (OPT_MAX+2)
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/* Options relevant to the architecture (excluding loader-specific ones),
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* in this case none:
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@@ -31,7 +32,8 @@
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KEXEC_ARCH_OPTIONS \
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{"command-line", 1, 0, OPT_APPEND}, \
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{"append", 1, 0, OPT_APPEND}, \
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- {"initrd", 1, 0, OPT_RAMDISK},
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+ {"initrd", 1, 0, OPT_RAMDISK}, \
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+ {"reuse-cmdline", 0, 0, OPT_REUSE_CMDLINE },
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#define KEXEC_ALL_OPT_STR KEXEC_ARCH_OPT_STR
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diff --git a/kexec/arch/s390/kexec-image.c b/kexec/arch/s390/kexec-image.c
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index 209ab77ddccbd60f10989e2d9fc273324aefa76d..69aaf96812f741110bf323b4bb8d5dda155f293a 100644
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--- a/kexec/arch/s390/kexec-image.c
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+++ b/kexec/arch/s390/kexec-image.c
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@@ -71,6 +71,10 @@ int image_s390_load_file(int argc, char **argv, struct kexec_info *info)
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case OPT_RAMDISK:
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ramdisk = optarg;
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break;
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+ case OPT_REUSE_CMDLINE:
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+ free(info->command_line);
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+ info->command_line = get_command_line();
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+ break;
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}
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}
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@@ -123,6 +127,10 @@ image_s390_load(int argc, char **argv, const char *kernel_buf,
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if (command_line_add(info, optarg))
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return -1;
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break;
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+ case OPT_REUSE_CMDLINE:
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+ free(info->command_line);
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+ info->command_line = get_command_line();
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+ break;
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case OPT_RAMDISK:
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ramdisk = optarg;
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break;
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@@ -223,5 +231,6 @@ image_s390_usage(void)
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printf("--command-line=STRING Set the kernel command line to STRING.\n"
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"--append=STRING Set the kernel command line to STRING.\n"
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"--initrd=FILENAME Use the file FILENAME as a ramdisk.\n"
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+ "--reuse-cmdline Use kernel command line from running system.\n"
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);
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}
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