diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/crash_dump.c | 41 | ||||
| -rw-r--r-- | arch/s390/kernel/ipl.c | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/nospec-branch.c | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/os_info.c | 29 | ||||
| -rw-r--r-- | arch/s390/kernel/perf_cpum_cf.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/perf_cpum_cf_events.c | 11 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 6 | ||||
| -rw-r--r-- | arch/s390/kernel/stacktrace.c | 19 | ||||
| -rw-r--r-- | arch/s390/kernel/uv.c | 51 | ||||
| -rw-r--r-- | arch/s390/kernel/vmcore_info.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/vmlinux.lds.S | 38 |
12 files changed, 127 insertions, 84 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index fa029d0dc28f..db2d9ba5a86d 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -11,6 +11,8 @@ CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE) # Do not trace early setup code CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE) CFLAGS_REMOVE_rethook.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_stacktrace.o = $(CC_FLAGS_FTRACE) +CFLAGS_REMOVE_unwind_bc.o = $(CC_FLAGS_FTRACE) endif diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index d09ebb6f5262..9863ebe75019 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -465,7 +465,11 @@ static void *ehdr_init(Elf64_Ehdr *ehdr, int mem_chunk_cnt) ehdr->e_phoff = sizeof(Elf64_Ehdr); ehdr->e_ehsize = sizeof(Elf64_Ehdr); ehdr->e_phentsize = sizeof(Elf64_Phdr); - ehdr->e_phnum = mem_chunk_cnt + 1; + /* + * Number of memory chunk PT_LOAD program headers plus one kernel + * image PT_LOAD program header plus one PT_NOTE program header. + */ + ehdr->e_phnum = mem_chunk_cnt + 1 + 1; return ehdr + 1; } @@ -501,15 +505,16 @@ static int get_mem_chunk_cnt(void) */ static void loads_init(Elf64_Phdr *phdr) { + unsigned long old_identity_base = os_info_old_value(OS_INFO_IDENTITY_BASE); phys_addr_t start, end; u64 idx; for_each_physmem_range(idx, &oldmem_type, &start, &end) { - phdr->p_filesz = end - start; phdr->p_type = PT_LOAD; + phdr->p_vaddr = old_identity_base + start; phdr->p_offset = start; - phdr->p_vaddr = (unsigned long)__va(start); phdr->p_paddr = start; + phdr->p_filesz = end - start; phdr->p_memsz = end - start; phdr->p_flags = PF_R | PF_W | PF_X; phdr->p_align = PAGE_SIZE; @@ -518,6 +523,25 @@ static void loads_init(Elf64_Phdr *phdr) } /* + * Prepare PT_LOAD type program header for kernel image region + */ +static void text_init(Elf64_Phdr *phdr) +{ + unsigned long start_phys = os_info_old_value(OS_INFO_IMAGE_PHYS); + unsigned long start = os_info_old_value(OS_INFO_IMAGE_START); + unsigned long end = os_info_old_value(OS_INFO_IMAGE_END); + + phdr->p_type = PT_LOAD; + phdr->p_vaddr = start; + phdr->p_filesz = end - start; + phdr->p_memsz = end - start; + phdr->p_offset = start_phys; + phdr->p_paddr = start_phys; + phdr->p_flags = PF_R | PF_W | PF_X; + phdr->p_align = PAGE_SIZE; +} + +/* * Initialize notes (new kernel) */ static void *notes_init(Elf64_Phdr *phdr, void *ptr, u64 notes_offset) @@ -557,6 +581,8 @@ static size_t get_elfcorehdr_size(int mem_chunk_cnt) size += nt_vmcoreinfo_size(); /* nt_final */ size += sizeof(Elf64_Nhdr); + /* PT_LOAD type program header for kernel text region */ + size += sizeof(Elf64_Phdr); /* PT_LOADS */ size += mem_chunk_cnt * sizeof(Elf64_Phdr); @@ -568,7 +594,7 @@ static size_t get_elfcorehdr_size(int mem_chunk_cnt) */ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size) { - Elf64_Phdr *phdr_notes, *phdr_loads; + Elf64_Phdr *phdr_notes, *phdr_loads, *phdr_text; size_t alloc_size; int mem_chunk_cnt; void *ptr, *hdr; @@ -606,14 +632,19 @@ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size) /* Init program headers */ phdr_notes = ptr; ptr = PTR_ADD(ptr, sizeof(Elf64_Phdr)); + phdr_text = ptr; + ptr = PTR_ADD(ptr, sizeof(Elf64_Phdr)); phdr_loads = ptr; ptr = PTR_ADD(ptr, sizeof(Elf64_Phdr) * mem_chunk_cnt); /* Init notes */ hdr_off = PTR_DIFF(ptr, hdr); ptr = notes_init(phdr_notes, ptr, ((unsigned long) hdr) + hdr_off); + /* Init kernel text program header */ + text_init(phdr_text); /* Init loads */ - hdr_off = PTR_DIFF(ptr, hdr); loads_init(phdr_loads); + /* Finalize program headers */ + hdr_off = PTR_DIFF(ptr, hdr); *addr = (unsigned long long) hdr; *size = (unsigned long long) hdr_off; BUG_ON(elfcorehdr_size > alloc_size); diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 1486350a4177..7dc54571f18e 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -1209,8 +1209,8 @@ static struct attribute_group reipl_nss_attr_group = { void set_os_info_reipl_block(void) { - os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, - reipl_block_actual->hdr.len); + os_info_entry_add_data(OS_INFO_REIPL_BLOCK, reipl_block_actual, + reipl_block_actual->hdr.len); } /* reipl type */ @@ -1940,7 +1940,7 @@ static void dump_reipl_run(struct shutdown_trigger *trigger) reipl_type == IPL_TYPE_NSS || reipl_type == IPL_TYPE_UNKNOWN) os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR; - os_info_entry_add(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); + os_info_entry_add_data(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); csum = (__force unsigned int)cksm(reipl_block_actual, reipl_block_actual->hdr.len, 0); abs_lc = get_abs_lowcore(); abs_lc->ipib = __pa(reipl_block_actual); diff --git a/arch/s390/kernel/nospec-branch.c b/arch/s390/kernel/nospec-branch.c index d1b16d83e49a..9b8c24ebb008 100644 --- a/arch/s390/kernel/nospec-branch.c +++ b/arch/s390/kernel/nospec-branch.c @@ -114,10 +114,10 @@ static void __init_or_module __nospec_revert(s32 *start, s32 *end) type = BRASL_EXPOLINE; /* brasl instruction */ else continue; - thunk = instr + (*(int *)(instr + 2)) * 2; + thunk = instr + (long)(*(int *)(instr + 2)) * 2; if (thunk[0] == 0xc6 && thunk[1] == 0x00) /* exrl %r0,<target-br> */ - br = thunk + (*(int *)(thunk + 2)) * 2; + br = thunk + (long)(*(int *)(thunk + 2)) * 2; else continue; if (br[0] != 0x07 || (br[1] & 0xf0) != 0xf0) diff --git a/arch/s390/kernel/os_info.c b/arch/s390/kernel/os_info.c index a801e6bd5341..b695f980bbde 100644 --- a/arch/s390/kernel/os_info.c +++ b/arch/s390/kernel/os_info.c @@ -15,8 +15,10 @@ #include <asm/checksum.h> #include <asm/abs_lowcore.h> #include <asm/os_info.h> +#include <asm/physmem_info.h> #include <asm/maccess.h> #include <asm/asm-offsets.h> +#include <asm/ipl.h> /* * OS info structure has to be page aligned @@ -43,9 +45,9 @@ void os_info_crashkernel_add(unsigned long base, unsigned long size) } /* - * Add OS info entry and update checksum + * Add OS info data entry and update checksum */ -void os_info_entry_add(int nr, void *ptr, u64 size) +void os_info_entry_add_data(int nr, void *ptr, u64 size) { os_info.entry[nr].addr = __pa(ptr); os_info.entry[nr].size = size; @@ -54,15 +56,36 @@ void os_info_entry_add(int nr, void *ptr, u64 size) } /* + * Add OS info value entry and update checksum + */ +void os_info_entry_add_val(int nr, u64 value) +{ + os_info.entry[nr].val = value; + os_info.entry[nr].size = 0; + os_info.entry[nr].csum = 0; + os_info.csum = os_info_csum(&os_info); +} + +/* * Initialize OS info structure and set lowcore pointer */ void __init os_info_init(void) { struct lowcore *abs_lc; + BUILD_BUG_ON(sizeof(struct os_info) != PAGE_SIZE); os_info.version_major = OS_INFO_VERSION_MAJOR; os_info.version_minor = OS_INFO_VERSION_MINOR; os_info.magic = OS_INFO_MAGIC; + os_info_entry_add_val(OS_INFO_IDENTITY_BASE, __identity_base); + os_info_entry_add_val(OS_INFO_KASLR_OFFSET, kaslr_offset()); + os_info_entry_add_val(OS_INFO_KASLR_OFF_PHYS, __kaslr_offset_phys); + os_info_entry_add_val(OS_INFO_VMEMMAP, (unsigned long)vmemmap); + os_info_entry_add_val(OS_INFO_AMODE31_START, AMODE31_START); + os_info_entry_add_val(OS_INFO_AMODE31_END, AMODE31_END); + os_info_entry_add_val(OS_INFO_IMAGE_START, (unsigned long)_stext); + os_info_entry_add_val(OS_INFO_IMAGE_END, (unsigned long)_end); + os_info_entry_add_val(OS_INFO_IMAGE_PHYS, __pa_symbol(_stext)); os_info.csum = os_info_csum(&os_info); abs_lc = get_abs_lowcore(); abs_lc->os_info = __pa(&os_info); @@ -125,7 +148,7 @@ static void os_info_old_init(void) if (os_info_init) return; - if (!oldmem_data.start) + if (!oldmem_data.start && !is_ipl_type_dump()) goto fail; if (copy_oldmem_kernel(&addr, __LC_OS_INFO, sizeof(addr))) goto fail; diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c index 41ed6e0f0a2a..1434642e9cba 100644 --- a/arch/s390/kernel/perf_cpum_cf.c +++ b/arch/s390/kernel/perf_cpum_cf.c @@ -428,7 +428,7 @@ static void cpum_cf_make_setsize(enum cpumf_ctr_set ctrset) case CPUMF_CTR_SET_CRYPTO: if (cpumf_ctr_info.csvn >= 1 && cpumf_ctr_info.csvn <= 5) ctrset_size = 16; - else if (cpumf_ctr_info.csvn == 6 || cpumf_ctr_info.csvn == 7) + else if (cpumf_ctr_info.csvn >= 6) ctrset_size = 20; break; case CPUMF_CTR_SET_EXT: diff --git a/arch/s390/kernel/perf_cpum_cf_events.c b/arch/s390/kernel/perf_cpum_cf_events.c index 0d64aafd158f..e4a6bfc91080 100644 --- a/arch/s390/kernel/perf_cpum_cf_events.c +++ b/arch/s390/kernel/perf_cpum_cf_events.c @@ -855,16 +855,11 @@ __init const struct attribute_group **cpumf_cf_event_group(void) } /* Determine version specific crypto set */ - switch (ci.csvn) { - case 1 ... 5: + csvn = none; + if (ci.csvn >= 1 && ci.csvn <= 5) csvn = cpumcf_svn_12345_pmu_event_attr; - break; - case 6 ... 7: + else if (ci.csvn >= 6) csvn = cpumcf_svn_67_pmu_event_attr; - break; - default: - csvn = none; - } /* Determine model-specific counter set(s) */ get_cpu_id(&cpu_id); diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 24ed33f044ec..cbd5290939df 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -146,10 +146,10 @@ static u32 __amode31_ref *__ctl_linkage_stack = __ctl_linkage_stack_amode31; static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31; unsigned long __bootdata_preserved(max_mappable); -unsigned long __bootdata(ident_map_size); struct physmem_info __bootdata(physmem_info); -unsigned long __bootdata_preserved(__kaslr_offset); +struct vm_layout __bootdata_preserved(vm_layout); +EXPORT_SYMBOL_GPL(vm_layout); int __bootdata_preserved(__kaslr_enabled); unsigned int __bootdata_preserved(zlib_dfltcc_support); EXPORT_SYMBOL(zlib_dfltcc_support); @@ -765,7 +765,7 @@ static void __init relocate_amode31_section(void) unsigned long amode31_size = __eamode31 - __samode31; long amode31_offset, *ptr; - amode31_offset = physmem_info.reserved[RR_AMODE31].start - (unsigned long)__samode31; + amode31_offset = AMODE31_START - (unsigned long)__samode31; pr_info("Relocating AMODE31 section of size 0x%08lx\n", amode31_size); /* Move original AMODE31 section to the new one */ diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c index 94f440e38303..7c294da45bf5 100644 --- a/arch/s390/kernel/stacktrace.c +++ b/arch/s390/kernel/stacktrace.c @@ -101,3 +101,22 @@ void arch_stack_walk_user(stack_trace_consume_fn consume_entry, void *cookie, } pagefault_enable(); } + +unsigned long return_address(unsigned int n) +{ + struct unwind_state state; + unsigned long addr; + + /* Increment to skip current stack entry */ + n++; + + unwind_for_each_frame(&state, NULL, NULL, 0) { + addr = unwind_get_return_address(&state); + if (!addr) + break; + if (!n--) + return addr; + } + return 0; +} +EXPORT_SYMBOL_GPL(return_address); diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index fc07bc39e698..265fea37e030 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -21,6 +21,7 @@ /* the bootdata_preserved fields come from ones in arch/s390/boot/uv.c */ #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST int __bootdata_preserved(prot_virt_guest); +EXPORT_SYMBOL(prot_virt_guest); #endif /* @@ -181,36 +182,36 @@ int uv_convert_owned_from_secure(unsigned long paddr) } /* - * Calculate the expected ref_count for a page that would otherwise have no + * Calculate the expected ref_count for a folio that would otherwise have no * further pins. This was cribbed from similar functions in other places in * the kernel, but with some slight modifications. We know that a secure - * page can not be a huge page for example. + * folio can not be a large folio, for example. */ -static int expected_page_refs(struct page *page) +static int expected_folio_refs(struct folio *folio) { int res; - res = page_mapcount(page); - if (PageSwapCache(page)) { + res = folio_mapcount(folio); + if (folio_test_swapcache(folio)) { res++; - } else if (page_mapping(page)) { + } else if (folio_mapping(folio)) { res++; - if (page_has_private(page)) + if (folio->private) res++; } return res; } -static int make_page_secure(struct page *page, struct uv_cb_header *uvcb) +static int make_folio_secure(struct folio *folio, struct uv_cb_header *uvcb) { int expected, cc = 0; - if (PageWriteback(page)) + if (folio_test_writeback(folio)) return -EAGAIN; - expected = expected_page_refs(page); - if (!page_ref_freeze(page, expected)) + expected = expected_folio_refs(folio); + if (!folio_ref_freeze(folio, expected)) return -EBUSY; - set_bit(PG_arch_1, &page->flags); + set_bit(PG_arch_1, &folio->flags); /* * If the UVC does not succeed or fail immediately, we don't want to * loop for long, or we might get stall notifications. @@ -220,9 +221,9 @@ static int make_page_secure(struct page *page, struct uv_cb_header *uvcb) * -EAGAIN and we let the callers deal with it. */ cc = __uv_call(0, (u64)uvcb); - page_ref_unfreeze(page, expected); + folio_ref_unfreeze(folio, expected); /* - * Return -ENXIO if the page was not mapped, -EINVAL for other errors. + * Return -ENXIO if the folio was not mapped, -EINVAL for other errors. * If busy or partially completed, return -EAGAIN. */ if (cc == UVC_CC_OK) @@ -277,7 +278,7 @@ int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb) bool local_drain = false; spinlock_t *ptelock; unsigned long uaddr; - struct page *page; + struct folio *folio; pte_t *ptep; int rc; @@ -306,15 +307,19 @@ again: if (!ptep) goto out; if (pte_present(*ptep) && !(pte_val(*ptep) & _PAGE_INVALID) && pte_write(*ptep)) { - page = pte_page(*ptep); + folio = page_folio(pte_page(*ptep)); + rc = -EINVAL; + if (folio_test_large(folio)) + goto unlock; rc = -EAGAIN; - if (trylock_page(page)) { + if (folio_trylock(folio)) { if (should_export_before_import(uvcb, gmap->mm)) - uv_convert_from_secure(page_to_phys(page)); - rc = make_page_secure(page, uvcb); - unlock_page(page); + uv_convert_from_secure(PFN_PHYS(folio_pfn(folio))); + rc = make_folio_secure(folio, uvcb); + folio_unlock(folio); } } +unlock: pte_unmap_unlock(ptep, ptelock); out: mmap_read_unlock(gmap->mm); @@ -324,10 +329,10 @@ out: * If we are here because the UVC returned busy or partial * completion, this is just a useless check, but it is safe. */ - wait_on_page_writeback(page); + folio_wait_writeback(folio); } else if (rc == -EBUSY) { /* - * If we have tried a local drain and the page refcount + * If we have tried a local drain and the folio refcount * still does not match our expected safe value, try with a * system wide drain. This is needed if the pagevecs holding * the page are on a different CPU. @@ -338,7 +343,7 @@ out: return -EAGAIN; } /* - * We are here if the page refcount does not match the + * We are here if the folio refcount does not match the * expected safe value. The main culprits are usually * pagevecs. With lru_add_drain() we drain the pagevecs * on the local CPU so that hopefully the refcount will diff --git a/arch/s390/kernel/vmcore_info.c b/arch/s390/kernel/vmcore_info.c index d296dfc22191..23f7d7619a99 100644 --- a/arch/s390/kernel/vmcore_info.c +++ b/arch/s390/kernel/vmcore_info.c @@ -14,7 +14,9 @@ void arch_crash_save_vmcoreinfo(void) VMCOREINFO_LENGTH(lowcore_ptr, NR_CPUS); vmcoreinfo_append_str("SAMODE31=%lx\n", (unsigned long)__samode31); vmcoreinfo_append_str("EAMODE31=%lx\n", (unsigned long)__eamode31); + vmcoreinfo_append_str("IDENTITYBASE=%lx\n", __identity_base); vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset()); + vmcoreinfo_append_str("KERNELOFFPHYS=%lx\n", __kaslr_offset_phys); abs_lc = get_abs_lowcore(); abs_lc->vmcore_info = paddr_vmcoreinfo_note(); put_abs_lowcore(abs_lc); diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 48de296e8905..a1ce3925ec71 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -39,7 +39,7 @@ PHDRS { SECTIONS { - . = 0x100000; + . = __START_KERNEL; .text : { _stext = .; /* Start of text section */ _text = .; /* Text and read-only data */ @@ -183,7 +183,7 @@ SECTIONS .amode31.data : { *(.amode31.data) } - . = ALIGN(PAGE_SIZE); + . = _samode31 + AMODE31_SIZE; _eamode31 = .; /* early.c uses stsi, which requires page aligned data. */ @@ -192,31 +192,6 @@ SECTIONS PERCPU_SECTION(0x100) -#ifdef CONFIG_PIE_BUILD - .dynsym ALIGN(8) : { - __dynsym_start = .; - *(.dynsym) - __dynsym_end = .; - } - .rela.dyn ALIGN(8) : { - __rela_dyn_start = .; - *(.rela*) - __rela_dyn_end = .; - } - .dynamic ALIGN(8) : { - *(.dynamic) - } - .dynstr ALIGN(8) : { - *(.dynstr) - } -#endif - .hash ALIGN(8) : { - *(.hash) - } - .gnu.hash ALIGN(8) : { - *(.gnu.hash) - } - . = ALIGN(PAGE_SIZE); __init_end = .; /* freed after init ends here */ @@ -230,7 +205,6 @@ SECTIONS * it should match struct vmlinux_info */ .vmlinux.info 0 (INFO) : { - QUAD(_stext) /* default_lma */ QUAD(startup_continue) /* entry */ QUAD(__bss_start - _stext) /* image_size */ QUAD(__bss_stop - __bss_start) /* bss_size */ @@ -239,14 +213,8 @@ SECTIONS QUAD(__boot_data_preserved_start) /* bootdata_preserved_off */ QUAD(__boot_data_preserved_end - __boot_data_preserved_start) /* bootdata_preserved_size */ -#ifdef CONFIG_PIE_BUILD - QUAD(__dynsym_start) /* dynsym_start */ - QUAD(__rela_dyn_start) /* rela_dyn_start */ - QUAD(__rela_dyn_end) /* rela_dyn_end */ -#else QUAD(__got_start) /* got_start */ QUAD(__got_end) /* got_end */ -#endif QUAD(_eamode31 - _samode31) /* amode31_size */ QUAD(init_mm) QUAD(swapper_pg_dir) @@ -282,12 +250,10 @@ SECTIONS *(.plt) *(.plt.*) *(.iplt) *(.igot .igot.plt) } ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!") -#ifndef CONFIG_PIE_BUILD .rela.dyn : { *(.rela.*) *(.rela_*) } ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!") -#endif /* Sections to be discarded */ DISCARDS |