diff options
Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index dc8770d7173..0dff972a169 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -206,6 +206,7 @@ static noinline __init void clear_bss_section(void) */ static noinline __init void init_kernel_storage_key(void) { +#if PAGE_DEFAULT_KEY unsigned long end_pfn, init_pfn; end_pfn = PFN_UP(__pa(&_end)); @@ -213,6 +214,7 @@ static noinline __init void init_kernel_storage_key(void) for (init_pfn = 0 ; init_pfn < end_pfn; init_pfn++) page_set_storage_key(init_pfn << PAGE_SHIFT, PAGE_DEFAULT_KEY, 0); +#endif } static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE); @@ -256,13 +258,19 @@ static __init void setup_topology(void) static void early_pgm_check_handler(void) { const struct exception_table_entry *fixup; + unsigned long cr0, cr0_new; unsigned long addr; addr = S390_lowcore.program_old_psw.addr; fixup = search_exception_tables(addr & PSW_ADDR_INSN); if (!fixup) disabled_wait(0); + /* Disable low address protection before storing into lowcore. */ + __ctl_store(cr0, 0, 0); + cr0_new = cr0 & ~(1UL << 28); + __ctl_load(cr0_new, 0, 0); S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE; + __ctl_load(cr0, 0, 0); } static noinline __init void setup_lowcore_early(void) @@ -378,14 +386,14 @@ static __init void detect_machine_facilities(void) S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2; if (test_facility(3)) S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE; - if (test_facility(27)) - S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS; if (test_facility(40)) S390_lowcore.machine_flags |= MACHINE_FLAG_LPP; if (test_facility(50) && test_facility(73)) S390_lowcore.machine_flags |= MACHINE_FLAG_TE; if (test_facility(66)) S390_lowcore.machine_flags |= MACHINE_FLAG_RRBM; + if (test_facility(51)) + S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_LC; #endif } @@ -481,7 +489,7 @@ void __init startup_init(void) detect_diag44(); detect_machine_facilities(); setup_topology(); - sclp_facilities_detect(); + sclp_early_detect(); #ifdef CONFIG_DYNAMIC_FTRACE S390_lowcore.ftrace_func = (unsigned long)ftrace_caller; #endif |