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[S390] ipl: Reboot from alternate device does not work when booting from file

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During startup we check if diag308 works using diag 308 subcode 6,
which stores the actual ipl information. This fails with rc = 0x102, if
the system has been ipled from the HMC using load from CD or load from file.
In the case of rc = 0x102 we have to assume that diag 308 is working,
since it still can be used to ipl from an alternative device.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2008-08-01 16:39:10 +02:00 committed by Martin Schwidefsky
parent 4abb08c24b
commit 3a95e8eb34
2 changed files with 6 additions and 2 deletions
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5
arch/s390/kernel/ipl.c
View file

@ -1705,7 +1705,10 @@ void __init setup_ipl(void)
void __init ipl_update_parameters(void)
{
if (diag308(DIAG308_STORE, &ipl_block) == DIAG308_RC_OK)
int rc;
rc = diag308(DIAG308_STORE, &ipl_block);
if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
diag308_set_works = 1;
}

3
include/asm-s390/ipl.h
View file

@ -159,7 +159,8 @@ enum diag308_vm_flags {
};
enum diag308_rc {
DIAG308_RC_OK = 1,
DIAG308_RC_OK = 0x0001,
DIAG308_RC_NOCONFIG = 0x0102,
};
extern int diag308(unsigned long subcode, void *addr);