From 84f4e1dfb243c0aaed0425a2b1c308a2fb37425d Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Sun, 24 Apr 2022 15:52:01 +0200 Subject: [PATCH] s390/boot: change initial program check handler to disabled wait psw The program check handler of the kernel image points to startup_pgm_check_handler. However an early program check which happens while loading the kernel image will jump to potentially random code, since the code of the program check handler is not yet loaded; leading to a program check loop. Therefore initialize it to a disabled wait psw and let the startup code set the proper psw when everything is in memory. Reviewed-by: Vasily Gorbik Signed-off-by: Heiko Carstens --- arch/s390/boot/head.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/boot/head.S b/arch/s390/boot/head.S index 206fca8cb81625..0b2cec40f261af 100644 --- a/arch/s390/boot/head.S +++ b/arch/s390/boot/head.S @@ -69,7 +69,7 @@ __HEAD .org __LC_EXT_NEW_PSW # 0x1b0 .quad 0x0002000180000000,0x1b0 # disabled wait .org __LC_PGM_NEW_PSW # 0x1d0 - .quad 0x0000000180000000,startup_pgm_check_handler + .quad 0x0002000180000000,0x1d0 # disabled wait .org __LC_IO_NEW_PSW # 0x1f0 .quad 0x0002000180000000,0x1f0 # disabled wait