X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fsetup.c;h=fe14beb338e5cdef26299862d38b46a98c3ca8a8;hb=8596e589b787732c8346f0482919e83cc9362db1;hp=ff0f9e8389162799e3453e348dc95402c5e04973;hpb=9b49ceb8545b8eca68c03388a07ecca7caa5d9c1;p=linux-2.6-microblaze.git diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index ff0f9e838916..fe14beb338e5 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -89,27 +89,71 @@ EXPORT_SYMBOL(console_devno); unsigned int console_irq = -1; EXPORT_SYMBOL(console_irq); -unsigned long elf_hwcap __read_mostly = 0; -char elf_platform[ELF_PLATFORM_SIZE]; +/* + * Some code and data needs to stay below 2 GB, even when the kernel would be + * relocated above 2 GB, because it has to use 31 bit addresses. + * Such code and data is part of the .amode31 section. + */ +unsigned long __amode31_ref __samode31 = __pa(&_samode31); +unsigned long __amode31_ref __eamode31 = __pa(&_eamode31); +unsigned long __amode31_ref __stext_amode31 = __pa(&_stext_amode31); +unsigned long __amode31_ref __etext_amode31 = __pa(&_etext_amode31); +struct exception_table_entry __amode31_ref *__start_amode31_ex_table = _start_amode31_ex_table; +struct exception_table_entry __amode31_ref *__stop_amode31_ex_table = _stop_amode31_ex_table; + +/* + * Control registers CR2, CR5 and CR15 are initialized with addresses + * of tables that must be placed below 2G which is handled by the AMODE31 + * sections. + * Because the AMODE31 sections are relocated below 2G at startup, + * the content of control registers CR2, CR5 and CR15 must be updated + * with new addresses after the relocation. The initial initialization of + * control registers occurs in head64.S and then gets updated again after AMODE31 + * relocation. We must access the relevant AMODE31 tables indirectly via + * pointers placed in the .amode31.refs linker section. Those pointers get + * updated automatically during AMODE31 relocation and always contain a valid + * address within AMODE31 sections. + */ + +static __amode31_data u32 __ctl_duct_amode31[16] __aligned(64); + +static __amode31_data u64 __ctl_aste_amode31[8] __aligned(64) = { + [1] = 0xffffffffffffffff +}; + +static __amode31_data u32 __ctl_duald_amode31[32] __aligned(128) = { + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0, + 0x80000000, 0, 0, 0 +}; + +static __amode31_data u32 __ctl_linkage_stack_amode31[8] __aligned(64) = { + 0, 0, 0x89000000, 0, + 0, 0, 0x8a000000, 0 +}; -unsigned long int_hwcap = 0; +static u64 __amode31_ref *__ctl_aste = __ctl_aste_amode31; +static u32 __amode31_ref *__ctl_duald = __ctl_duald_amode31; +static u32 __amode31_ref *__ctl_linkage_stack = __ctl_linkage_stack_amode31; +static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31; int __bootdata(noexec_disabled); unsigned long __bootdata(ident_map_size); struct mem_detect_info __bootdata(mem_detect); +struct initrd_data __bootdata(initrd_data); -struct exception_table_entry *__bootdata_preserved(__start_dma_ex_table); -struct exception_table_entry *__bootdata_preserved(__stop_dma_ex_table); -unsigned long __bootdata_preserved(__stext_dma); -unsigned long __bootdata_preserved(__etext_dma); -unsigned long __bootdata_preserved(__sdma); -unsigned long __bootdata_preserved(__edma); unsigned long __bootdata_preserved(__kaslr_offset); unsigned int __bootdata_preserved(zlib_dfltcc_support); EXPORT_SYMBOL(zlib_dfltcc_support); u64 __bootdata_preserved(stfle_fac_list[16]); EXPORT_SYMBOL(stfle_fac_list); u64 __bootdata_preserved(alt_stfle_fac_list[16]); +struct oldmem_data __bootdata_preserved(oldmem_data); unsigned long VMALLOC_START; EXPORT_SYMBOL(VMALLOC_START); @@ -254,7 +298,7 @@ static void __init setup_zfcpdump(void) { if (!is_ipl_type_dump()) return; - if (OLDMEM_BASE) + if (oldmem_data.start) return; strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev"); console_loglevel = 2; @@ -421,7 +465,7 @@ static void __init setup_lowcore_dat_off(void) lc->restart_stack = (unsigned long) restart_stack; lc->restart_fn = (unsigned long) do_restart; lc->restart_data = 0; - lc->restart_source = -1UL; + lc->restart_source = -1U; mcck_stack = (unsigned long)memblock_alloc(THREAD_SIZE, THREAD_SIZE); if (!mcck_stack) @@ -450,12 +494,19 @@ static void __init setup_lowcore_dat_off(void) static void __init setup_lowcore_dat_on(void) { + struct lowcore *lc = lowcore_ptr[0]; + __ctl_clear_bit(0, 28); S390_lowcore.external_new_psw.mask |= PSW_MASK_DAT; S390_lowcore.svc_new_psw.mask |= PSW_MASK_DAT; S390_lowcore.program_new_psw.mask |= PSW_MASK_DAT; S390_lowcore.io_new_psw.mask |= PSW_MASK_DAT; + __ctl_store(S390_lowcore.cregs_save_area, 0, 15); __ctl_set_bit(0, 28); + mem_assign_absolute(S390_lowcore.restart_flags, RESTART_FLAG_CTLREGS); + mem_assign_absolute(S390_lowcore.program_new_psw, lc->program_new_psw); + memcpy_absolute(&S390_lowcore.cregs_save_area, lc->cregs_save_area, + sizeof(S390_lowcore.cregs_save_area)); } static struct resource code_resource = { @@ -610,9 +661,9 @@ static void __init reserve_crashkernel(void) return; } - low = crash_base ?: OLDMEM_BASE; + low = crash_base ?: oldmem_data.start; high = low + crash_size; - if (low >= OLDMEM_BASE && high <= OLDMEM_BASE + OLDMEM_SIZE) { + if (low >= oldmem_data.start && high <= oldmem_data.start + oldmem_data.size) { /* The crashkernel fits into OLDMEM, reuse OLDMEM */ crash_base = low; } else { @@ -639,7 +690,7 @@ static void __init reserve_crashkernel(void) if (register_memory_notifier(&kdump_mem_nb)) return; - if (!OLDMEM_BASE && MACHINE_IS_VM) + if (!oldmem_data.start && MACHINE_IS_VM) diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size)); crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; @@ -658,11 +709,11 @@ static void __init reserve_crashkernel(void) static void __init reserve_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD - if (!INITRD_START || !INITRD_SIZE) + if (!initrd_data.start || !initrd_data.size) return; - initrd_start = INITRD_START; - initrd_end = initrd_start + INITRD_SIZE; - memblock_reserve(INITRD_START, INITRD_SIZE); + initrd_start = initrd_data.start; + initrd_end = initrd_start + initrd_data.size; + memblock_reserve(initrd_data.start, initrd_data.size); #endif } @@ -732,10 +783,10 @@ static void __init memblock_add_mem_detect_info(void) static void __init check_initrd(void) { #ifdef CONFIG_BLK_DEV_INITRD - if (INITRD_START && INITRD_SIZE && - !memblock_is_region_memory(INITRD_START, INITRD_SIZE)) { + if (initrd_data.start && initrd_data.size && + !memblock_is_region_memory(initrd_data.start, initrd_data.size)) { pr_err("The initial RAM disk does not fit into the memory\n"); - memblock_free(INITRD_START, INITRD_SIZE); + memblock_free(initrd_data.start, initrd_data.size); initrd_start = initrd_end = 0; } #endif @@ -748,10 +799,10 @@ static void __init reserve_kernel(void) { unsigned long start_pfn = PFN_UP(__pa(_end)); - memblock_reserve(0, HEAD_END); + memblock_reserve(0, STARTUP_NORMAL_OFFSET); + memblock_reserve((unsigned long)sclp_early_sccb, EXT_SCCB_READ_SCP); memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn) - (unsigned long)_stext); - memblock_reserve(__sdma, __edma - __sdma); } static void __init setup_memory(void) @@ -771,152 +822,52 @@ static void __init setup_memory(void) memblock_enforce_memory_limit(memblock_end_of_DRAM()); } -/* - * Setup hardware capabilities. - */ -static int __init setup_hwcaps(void) +static void __init relocate_amode31_section(void) { - static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 }; - struct cpuid cpu_id; - int i; - - /* - * The store facility list bits numbers as found in the principles - * of operation are numbered with bit 1UL<<31 as number 0 to - * bit 1UL<<0 as number 31. - * Bit 0: instructions named N3, "backported" to esa-mode - * Bit 2: z/Architecture mode is active - * Bit 7: the store-facility-list-extended facility is installed - * Bit 17: the message-security assist is installed - * Bit 19: the long-displacement facility is installed - * Bit 21: the extended-immediate facility is installed - * Bit 22: extended-translation facility 3 is installed - * Bit 30: extended-translation facility 3 enhancement facility - * These get translated to: - * HWCAP_S390_ESAN3 bit 0, HWCAP_S390_ZARCH bit 1, - * HWCAP_S390_STFLE bit 2, HWCAP_S390_MSA bit 3, - * HWCAP_S390_LDISP bit 4, HWCAP_S390_EIMM bit 5 and - * HWCAP_S390_ETF3EH bit 8 (22 && 30). - */ - for (i = 0; i < 6; i++) - if (test_facility(stfl_bits[i])) - elf_hwcap |= 1UL << i; - - if (test_facility(22) && test_facility(30)) - elf_hwcap |= HWCAP_S390_ETF3EH; - - /* - * Check for additional facilities with store-facility-list-extended. - * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0 - * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information - * as stored by stfl, bits 32-xxx contain additional facilities. - * How many facility words are stored depends on the number of - * doublewords passed to the instruction. The additional facilities - * are: - * Bit 42: decimal floating point facility is installed - * Bit 44: perform floating point operation facility is installed - * translated to: - * HWCAP_S390_DFP bit 6 (42 && 44). - */ - if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44)) - elf_hwcap |= HWCAP_S390_DFP; - - /* - * Huge page support HWCAP_S390_HPAGE is bit 7. - */ - if (MACHINE_HAS_EDAT1) - elf_hwcap |= HWCAP_S390_HPAGE; - - /* - * 64-bit register support for 31-bit processes - * HWCAP_S390_HIGH_GPRS is bit 9. - */ - elf_hwcap |= HWCAP_S390_HIGH_GPRS; - - /* - * Transactional execution support HWCAP_S390_TE is bit 10. - */ - if (MACHINE_HAS_TE) - elf_hwcap |= HWCAP_S390_TE; - - /* - * Vector extension HWCAP_S390_VXRS is bit 11. The Vector extension - * can be disabled with the "novx" parameter. Use MACHINE_HAS_VX - * instead of facility bit 129. - */ - if (MACHINE_HAS_VX) { - elf_hwcap |= HWCAP_S390_VXRS; - if (test_facility(134)) - elf_hwcap |= HWCAP_S390_VXRS_BCD; - if (test_facility(135)) - elf_hwcap |= HWCAP_S390_VXRS_EXT; - if (test_facility(148)) - elf_hwcap |= HWCAP_S390_VXRS_EXT2; - if (test_facility(152)) - elf_hwcap |= HWCAP_S390_VXRS_PDE; - } - if (test_facility(150)) - elf_hwcap |= HWCAP_S390_SORT; - if (test_facility(151)) - elf_hwcap |= HWCAP_S390_DFLT; - - /* - * Guarded storage support HWCAP_S390_GS is bit 12. - */ - if (MACHINE_HAS_GS) - elf_hwcap |= HWCAP_S390_GS; - - get_cpu_id(&cpu_id); - add_device_randomness(&cpu_id, sizeof(cpu_id)); - switch (cpu_id.machine) { - case 0x2064: - case 0x2066: - default: /* Use "z900" as default for 64 bit kernels. */ - strcpy(elf_platform, "z900"); - break; - case 0x2084: - case 0x2086: - strcpy(elf_platform, "z990"); - break; - case 0x2094: - case 0x2096: - strcpy(elf_platform, "z9-109"); - break; - case 0x2097: - case 0x2098: - strcpy(elf_platform, "z10"); - break; - case 0x2817: - case 0x2818: - strcpy(elf_platform, "z196"); - break; - case 0x2827: - case 0x2828: - strcpy(elf_platform, "zEC12"); - break; - case 0x2964: - case 0x2965: - strcpy(elf_platform, "z13"); - break; - case 0x3906: - case 0x3907: - strcpy(elf_platform, "z14"); - break; - case 0x8561: - case 0x8562: - strcpy(elf_platform, "z15"); - break; - } - - /* - * Virtualization support HWCAP_INT_SIE is bit 0. - */ - if (sclp.has_sief2) - int_hwcap |= HWCAP_INT_SIE; + unsigned long amode31_addr, amode31_size; + long amode31_offset; + long *ptr; + + /* Allocate a new AMODE31 capable memory region */ + amode31_size = __eamode31 - __samode31; + pr_info("Relocating AMODE31 section of size 0x%08lx\n", amode31_size); + amode31_addr = (unsigned long)memblock_alloc_low(amode31_size, PAGE_SIZE); + if (!amode31_addr) + panic("Failed to allocate memory for AMODE31 section\n"); + amode31_offset = amode31_addr - __samode31; + + /* Move original AMODE31 section to the new one */ + memmove((void *)amode31_addr, (void *)__samode31, amode31_size); + /* Zero out the old AMODE31 section to catch invalid accesses within it */ + memset((void *)__samode31, 0, amode31_size); + + /* Update all AMODE31 region references */ + for (ptr = _start_amode31_refs; ptr != _end_amode31_refs; ptr++) + *ptr += amode31_offset; +} - return 0; +/* This must be called after AMODE31 relocation */ +static void __init setup_cr(void) +{ + union ctlreg2 cr2; + union ctlreg5 cr5; + union ctlreg15 cr15; + + __ctl_duct[1] = (unsigned long)__ctl_aste; + __ctl_duct[2] = (unsigned long)__ctl_aste; + __ctl_duct[4] = (unsigned long)__ctl_duald; + + /* Update control registers CR2, CR5 and CR15 */ + __ctl_store(cr2.val, 2, 2); + __ctl_store(cr5.val, 5, 5); + __ctl_store(cr15.val, 15, 15); + cr2.ducto = (unsigned long)__ctl_duct >> 6; + cr5.pasteo = (unsigned long)__ctl_duct >> 6; + cr15.lsea = (unsigned long)__ctl_linkage_stack >> 3; + __ctl_load(cr2.val, 2, 2); + __ctl_load(cr5.val, 5, 5); + __ctl_load(cr15.val, 15, 15); } -arch_initcall(setup_hwcaps); /* * Add system information as device randomness @@ -1059,6 +1010,9 @@ void __init setup_arch(char **cmdline_p) free_mem_detect_info(); + relocate_amode31_section(); + setup_cr(); + setup_uv(); setup_memory_end(); setup_memory();