diff options
Diffstat (limited to 'drivers/s390/char/sclp_early_core.c')
| -rw-r--r-- | drivers/s390/char/sclp_early_core.c | 34 |
1 files changed, 24 insertions, 10 deletions
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c index dbd5c53d8edf..55e50d428aab 100644 --- a/drivers/s390/char/sclp_early_core.c +++ b/drivers/s390/char/sclp_early_core.c @@ -7,11 +7,13 @@ #include <linux/kernel.h> #include <asm/processor.h> #include <asm/lowcore.h> +#include <asm/ctlreg.h> #include <asm/ebcdic.h> #include <asm/irq.h> #include <asm/sections.h> #include <asm/physmem_info.h> #include <asm/facility.h> +#include <asm/machine.h> #include "sclp.h" #include "sclp_rw.h" @@ -31,17 +33,17 @@ void sclp_early_wait_irq(void) psw_t psw_ext_save, psw_wait; union ctlreg0 cr0, cr0_new; - __ctl_store(cr0.val, 0, 0); + local_ctl_store(0, &cr0.reg); cr0_new.val = cr0.val & ~CR0_IRQ_SUBCLASS_MASK; cr0_new.lap = 0; cr0_new.sssm = 1; - __ctl_load(cr0_new.val, 0, 0); + local_ctl_load(0, &cr0_new.reg); - psw_ext_save = S390_lowcore.external_new_psw; + psw_ext_save = get_lowcore()->external_new_psw; psw_mask = __extract_psw(); - S390_lowcore.external_new_psw.mask = psw_mask; + get_lowcore()->external_new_psw.mask = psw_mask; psw_wait.mask = psw_mask | PSW_MASK_EXT | PSW_MASK_WAIT; - S390_lowcore.ext_int_code = 0; + get_lowcore()->ext_int_code = 0; do { asm volatile( @@ -49,16 +51,16 @@ void sclp_early_wait_irq(void) " stg %[addr],%[psw_wait_addr]\n" " stg %[addr],%[psw_ext_addr]\n" " lpswe %[psw_wait]\n" - "0:\n" + "0:" : [addr] "=&d" (addr), [psw_wait_addr] "=Q" (psw_wait.addr), - [psw_ext_addr] "=Q" (S390_lowcore.external_new_psw.addr) + [psw_ext_addr] "=Q" (get_lowcore()->external_new_psw.addr) : [psw_wait] "Q" (psw_wait) : "cc", "memory"); - } while (S390_lowcore.ext_int_code != EXT_IRQ_SERVICE_SIG); + } while (get_lowcore()->ext_int_code != EXT_IRQ_SERVICE_SIG); - S390_lowcore.external_new_psw = psw_ext_save; - __ctl_load(cr0.val, 0, 0); + get_lowcore()->external_new_psw = psw_ext_save; + local_ctl_load(0, &cr0.reg); } int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb) @@ -334,6 +336,18 @@ int __init sclp_early_get_hsa_size(unsigned long *hsa_size) return 0; } +void __init sclp_early_detect_machine_features(void) +{ + struct read_info_sccb *sccb = &sclp_info_sccb; + + if (!sclp_info_sccb_valid) + return; + if (sccb->fac85 & 0x02) + set_machine_feature(MFEATURE_ESOP); + if (sccb->fac91 & 0x40) + set_machine_feature(MFEATURE_TLB_GUEST); +} + #define SCLP_STORAGE_INFO_FACILITY 0x0000400000000000UL void __weak __init add_physmem_online_range(u64 start, u64 end) {} |