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pc-bios/s390x: Fix reset psw mask

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We need to set the short psw indication bit in the reset psw, as it is
a short psw.

Exposed by "s390x: Properly fetch and test the short psw on diag308
subc 0/1".

Fixes: 9629823290 ("pc-bios/s390-ccw: do a subsystem reset before running the guest")
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Message-Id: <20191203132813.2734-5-frankja@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Janosch Frank 2019-12-03 08:28:13 -05:00 committed by Cornelia Huck
parent 5afec76fbe
commit 5c6f0d5f46
1 changed files with 7 additions and 5 deletions
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12
pc-bios/s390-ccw/jump2ipl.c
View file

@ -12,11 +12,11 @@
#define KERN_IMAGE_START 0x010000UL
#define PSW_MASK_64 0x0000000100000000ULL
#define PSW_MASK_32 0x0000000080000000ULL
#define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64)
#define PSW_MASK_SHORTPSW 0x0008000000000000ULL
#define RESET_PSW_MASK (PSW_MASK_SHORTPSW | PSW_MASK_32 | PSW_MASK_64)
typedef struct ResetInfo {
uint32_t ipl_mask;
uint32_t ipl_addr;
uint64_t ipl_psw;
uint32_t ipl_continue;
} ResetInfo;
@ -50,7 +50,9 @@ void jump_to_IPL_code(uint64_t address)
ResetInfo *current = 0;
save = *current;
current->ipl_addr = (uint32_t) (uint64_t) &jump_to_IPL_2;
current->ipl_psw = (uint64_t) &jump_to_IPL_2;
current->ipl_psw |= RESET_PSW_MASK;
current->ipl_continue = address & 0x7fffffff;
debug_print_int("set IPL addr to", current->ipl_continue);
@ -82,7 +84,7 @@ void jump_to_low_kernel(void)
}
/* Trying to get PSW at zero address */
if (*((uint64_t *)0) & IPL_PSW_MASK) {
if (*((uint64_t *)0) & RESET_PSW_MASK) {
jump_to_IPL_code((*((uint64_t *)0)) & 0x7fffffff);
}