diff options
Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 068f8465c4ee..c9ffe0025197 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -252,7 +252,7 @@ static noinline __init void setup_lowcore_early(void) { psw_t psw; - psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY; + psw.mask = PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA; psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_ext_handler; S390_lowcore.external_new_psw = psw; psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; @@ -390,23 +390,27 @@ static __init void detect_machine_facilities(void) S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS; if (test_facility(40)) S390_lowcore.machine_flags |= MACHINE_FLAG_SPP; + if (test_facility(25)) + S390_lowcore.machine_flags |= MACHINE_FLAG_STCKF; #endif } static __init void rescue_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD + unsigned long min_initrd_addr = (unsigned long) _end + (4UL << 20); /* - * Move the initrd right behind the bss section in case it starts - * within the bss section. So we don't overwrite it when the bss - * section gets cleared. + * Just like in case of IPL from VM reader we make sure there is a + * gap of 4MB between end of kernel and start of initrd. + * That way we can also be sure that saving an NSS will succeed, + * which however only requires different segments. */ if (!INITRD_START || !INITRD_SIZE) return; - if (INITRD_START >= (unsigned long) __bss_stop) + if (INITRD_START >= min_initrd_addr) return; - memmove(__bss_stop, (void *) INITRD_START, INITRD_SIZE); - INITRD_START = (unsigned long) __bss_stop; + memmove((void *) min_initrd_addr, (void *) INITRD_START, INITRD_SIZE); + INITRD_START = min_initrd_addr; #endif } |