s390/boot: block uncompressed vmlinux booting attempts

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Since the plain vmlinux ELF file no longer carries all necessary parts
for starting up (like the entry point and decompressor), add a check
which would block boot process and encourage users to use bzImage or
arch/s390/boot/compressed/vmlinux instead.

The check relies on s390 linux entry point ABI definition, which is only
present in bzImage and arch/s390/boot/compressed/vmlinux.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

...

This commit is contained in:

Vasily Gorbik 2018-06-25 13:59:35 +02:00 • committed by Martin Schwidefsky

parent 9acdb3bb07

commit 627c9b6205

3 changed files with 16 additions and 3 deletions

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4

arch/s390/boot/head.S

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3

arch/s390/include/asm/setup.h

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12

arch/s390/kernel/early.c

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