diff options
Diffstat (limited to 'arch/s390/kernel/early.c')
| -rw-r--r-- | arch/s390/kernel/early.c | 83 |
1 files changed, 50 insertions, 33 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 6684fff1755..0dff972a169 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -1,6 +1,4 @@ /* - * arch/s390/kernel/early.c - * * Copyright IBM Corp. 2007, 2009 * Author(s): Hongjie Yang <hongjie@us.ibm.com>, * Heiko Carstens <heiko.carstens@de.ibm.com> @@ -49,10 +47,10 @@ static void __init reset_tod_clock(void) { u64 time; - if (store_clock(&time) == 0) + if (store_tod_clock(&time) == 0) return; /* TOD clock not running. Set the clock to Unix Epoch. */ - if (set_clock(TOD_UNIX_EPOCH) != 0 || store_clock(&time) != 0) + if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0) disabled_wait(0); sched_clock_base_cc = TOD_UNIX_EPOCH; @@ -175,7 +173,7 @@ static noinline __init void create_kernel_nss(void) } /* re-initialize cputime accounting. */ - sched_clock_base_cc = get_clock(); + sched_clock_base_cc = get_tod_clock(); S390_lowcore.last_update_clock = sched_clock_base_cc; S390_lowcore.last_update_timer = 0x7fffffffffffffffULL; S390_lowcore.user_timer = 0; @@ -208,6 +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)); @@ -215,38 +214,63 @@ 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 struct sysinfo_3_2_2 vmms __aligned(PAGE_SIZE); +static __initdata char sysinfo_page[PAGE_SIZE] __aligned(PAGE_SIZE); static noinline __init void detect_machine_type(void) { + struct sysinfo_3_2_2 *vmms = (struct sysinfo_3_2_2 *)&sysinfo_page; + /* Check current-configuration-level */ - if ((stsi(NULL, 0, 0, 0) >> 28) <= 2) { + if (stsi(NULL, 0, 0, 0) <= 2) { S390_lowcore.machine_flags |= MACHINE_FLAG_LPAR; return; } /* Get virtual-machine cpu information. */ - if (stsi(&vmms, 3, 2, 2) == -ENOSYS || !vmms.count) + if (stsi(vmms, 3, 2, 2) || !vmms->count) return; /* Running under KVM? If not we assume z/VM */ - if (!memcmp(vmms.vm[0].cpi, "\xd2\xe5\xd4", 3)) + if (!memcmp(vmms->vm[0].cpi, "\xd2\xe5\xd4", 3)) S390_lowcore.machine_flags |= MACHINE_FLAG_KVM; else S390_lowcore.machine_flags |= MACHINE_FLAG_VM; } +static __init void setup_topology(void) +{ +#ifdef CONFIG_64BIT + int max_mnest; + + if (!test_facility(11)) + return; + S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY; + for (max_mnest = 6; max_mnest > 1; max_mnest--) { + if (stsi(&sysinfo_page, 15, 1, max_mnest) == 0) + break; + } + topology_max_mnest = max_mnest; +#endif +} + static void early_pgm_check_handler(void) { - unsigned long addr; 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); - S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE; + /* 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) @@ -267,16 +291,6 @@ static noinline __init void setup_facility_list(void) ARRAY_SIZE(S390_lowcore.stfle_fac_list)); } -static noinline __init void setup_hpage(void) -{ -#ifndef CONFIG_DEBUG_PAGEALLOC - if (!test_facility(2) || !test_facility(8)) - return; - S390_lowcore.machine_flags |= MACHINE_FLAG_HPAGE; - __ctl_set_bit(0, 23); -#endif -} - static __init void detect_mvpg(void) { #ifndef CONFIG_64BIT @@ -364,16 +378,22 @@ static __init void detect_diag44(void) static __init void detect_machine_facilities(void) { #ifdef CONFIG_64BIT + if (test_facility(8)) { + S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT1; + __ctl_set_bit(0, 23); + } + if (test_facility(78)) + S390_lowcore.machine_flags |= MACHINE_FLAG_EDAT2; if (test_facility(3)) S390_lowcore.machine_flags |= MACHINE_FLAG_IDTE; - if (test_facility(8)) - S390_lowcore.machine_flags |= MACHINE_FLAG_PFMF; - if (test_facility(11)) - S390_lowcore.machine_flags |= MACHINE_FLAG_TOPOLOGY; - if (test_facility(27)) - S390_lowcore.machine_flags |= MACHINE_FLAG_MVCOS; if (test_facility(40)) - S390_lowcore.machine_flags |= MACHINE_FLAG_SPP; + 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 } @@ -443,7 +463,6 @@ static void __init setup_boot_command_line(void) append_to_cmdline(append_ipl_scpdata); } - /* * Save ipl parameters, clear bss memory, initialize storage keys * and create a kernel NSS at startup if the SAVESYS= parm is defined @@ -457,7 +476,6 @@ void __init startup_init(void) init_kernel_storage_key(); lockdep_init(); lockdep_off(); - sort_main_extable(); setup_lowcore_early(); setup_facility_list(); detect_machine_type(); @@ -470,9 +488,8 @@ void __init startup_init(void) detect_diag9c(); detect_diag44(); detect_machine_facilities(); - setup_hpage(); - sclp_facilities_detect(); - detect_memory_layout(memory_chunk); + setup_topology(); + sclp_early_detect(); #ifdef CONFIG_DYNAMIC_FTRACE S390_lowcore.ftrace_func = (unsigned long)ftrace_caller; #endif |