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s390/protvirt: block kernel command line alteration

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Disallow kernel command line alteration via ipl parameter block if
running in protected virtualization environment.

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 2019-04-01 19:11:08 +02:00 committed by Martin Schwidefsky
parent db9492cef4
commit 093ddccb55
1 changed files with 1 additions and 1 deletions
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2
arch/s390/boot/ipl_parm.c
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@ -144,7 +144,7 @@ void setup_boot_command_line(void)
strcpy(early_command_line, strim(COMMAND_LINE));
/* append IPL PARM data to the boot command line */
if (ipl_block_valid)
if (!is_prot_virt_guest() && ipl_block_valid)
append_ipl_block_parm();
}