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s390/mm: use correct address space when enabling DAT 

Right now the kernel uses the primary address space until finally the
switch to the correct home address space will be done when the idle
PSW will be loaded within psw_idle().

Correct this and simply use the home address space when DAT is enabled
for the first time.

This doesn't really fix a bug, but fixes odd behavior.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2017-06-01 11:04:04 +02:00 committed by Martin Schwidefsky
parent 36f6237ebf
commit 60c497014e
1 changed files with 5 additions and 1 deletions
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6
arch/s390/mm/init.c
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@ -81,6 +81,7 @@ void __init paging_init(void)
{
unsigned long max_zone_pfns[MAX_NR_ZONES];
unsigned long pgd_type, asce_bits;
psw_t psw;
init_mm.pgd = swapper_pg_dir;
if (VMALLOC_END > (1UL << 42)) {
@ -100,7 +101,10 @@ void __init paging_init(void)
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
__ctl_load(S390_lowcore.kernel_asce, 7, 7);
__ctl_load(S390_lowcore.kernel_asce, 13, 13);
__arch_local_irq_stosm(0x04);
psw.mask = __extract_psw();
psw_bits(psw).t = 1;
psw_bits(psw).as = PSW_AS_HOME;
__load_psw_mask(psw.mask);
sparse_memory_present_with_active_regions(MAX_NUMNODES);
sparse_init();