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s390/boot: add secure boot trailer

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[ Upstream commit aa127a069ef312aca02b730d5137e1778d0c3ba7 ]

This patch enhances the kernel image adding a trailer as required for
secure boot by future firmware versions.

Cc: <stable@vger.kernel.org> # 5.2+
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Peter Oberparleiter 2022-09-16 15:01:36 +02:00 committed by Greg Kroah-Hartman
parent efc6420d65
commit 6b24d9c2ac
1 changed files with 11 additions and 2 deletions
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13
arch/s390/boot/compressed/vmlinux.lds.S
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@ -91,8 +91,17 @@ SECTIONS
_compressed_start = .;
*(.vmlinux.bin.compressed)
_compressed_end = .;
FILL(0xff);
. = ALIGN(4096);
}
#define SB_TRAILER_SIZE 32
/* Trailer needed for Secure Boot */
. += SB_TRAILER_SIZE; /* make sure .sb.trailer does not overwrite the previous section */
. = ALIGN(4096) - SB_TRAILER_SIZE;
.sb.trailer : {
QUAD(0)
QUAD(0)
QUAD(0)
QUAD(0x000000207a49504c)
}
_end = .;