diff options
| -rw-r--r-- | arch/powerpc/include/asm/fadump-internal.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/fadump.c | 27 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-fadump.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/rtas-fadump.c | 255 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/rtas-fadump.h | 26 |
5 files changed, 197 insertions, 120 deletions
diff --git a/arch/powerpc/include/asm/fadump-internal.h b/arch/powerpc/include/asm/fadump-internal.h index 5d706a7acc8a..35787fa1ac60 100644 --- a/arch/powerpc/include/asm/fadump-internal.h +++ b/arch/powerpc/include/asm/fadump-internal.h @@ -156,6 +156,7 @@ struct fadump_ops { struct seq_file *m); void (*fadump_trigger)(struct fadump_crash_info_header *fdh, const char *msg); + int (*fadump_max_boot_mem_rgns)(void); }; /* Helper functions */ @@ -163,7 +164,6 @@ s32 __init fadump_setup_cpu_notes_buf(u32 num_cpus); void fadump_free_cpu_notes_buf(void); u32 *__init fadump_regs_to_elf_notes(u32 *buf, struct pt_regs *regs); void __init fadump_update_elfcore_header(char *bufp); -bool is_fadump_boot_mem_contiguous(void); bool is_fadump_reserved_mem_contiguous(void); #else /* !CONFIG_PRESERVE_FA_DUMP */ diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c index 0b849563393e..fe6be00451b9 100644 --- a/arch/powerpc/kernel/fadump.c +++ b/arch/powerpc/kernel/fadump.c @@ -221,28 +221,6 @@ static bool is_fadump_mem_area_contiguous(u64 d_start, u64 d_end) } /* - * Returns true, if there are no holes in boot memory area, - * false otherwise. - */ -bool is_fadump_boot_mem_contiguous(void) -{ - unsigned long d_start, d_end; - bool ret = false; - int i; - - for (i = 0; i < fw_dump.boot_mem_regs_cnt; i++) { - d_start = fw_dump.boot_mem_addr[i]; - d_end = d_start + fw_dump.boot_mem_sz[i]; - - ret = is_fadump_mem_area_contiguous(d_start, d_end); - if (!ret) - break; - } - - return ret; -} - -/* * Returns true, if there are no holes in reserved memory area, * false otherwise. */ @@ -381,10 +359,11 @@ static unsigned long __init get_fadump_area_size(void) static int __init add_boot_mem_region(unsigned long rstart, unsigned long rsize) { + int max_boot_mem_rgns = fw_dump.ops->fadump_max_boot_mem_rgns(); int i = fw_dump.boot_mem_regs_cnt++; - if (fw_dump.boot_mem_regs_cnt > FADUMP_MAX_MEM_REGS) { - fw_dump.boot_mem_regs_cnt = FADUMP_MAX_MEM_REGS; + if (fw_dump.boot_mem_regs_cnt > max_boot_mem_rgns) { + fw_dump.boot_mem_regs_cnt = max_boot_mem_rgns; return 0; } diff --git a/arch/powerpc/platforms/powernv/opal-fadump.c b/arch/powerpc/platforms/powernv/opal-fadump.c index 767a6b19e42a..5a88d7efb48a 100644 --- a/arch/powerpc/platforms/powernv/opal-fadump.c +++ b/arch/powerpc/platforms/powernv/opal-fadump.c @@ -599,6 +599,12 @@ static void opal_fadump_trigger(struct fadump_crash_info_header *fdh, pr_emerg("No backend support for MPIPL!\n"); } +/* FADUMP_MAX_MEM_REGS or lower */ +static int opal_fadump_max_boot_mem_rgns(void) +{ + return FADUMP_MAX_MEM_REGS; +} + static struct fadump_ops opal_fadump_ops = { .fadump_init_mem_struct = opal_fadump_init_mem_struct, .fadump_get_metadata_size = opal_fadump_get_metadata_size, @@ -611,6 +617,7 @@ static struct fadump_ops opal_fadump_ops = { .fadump_process = opal_fadump_process, .fadump_region_show = opal_fadump_region_show, .fadump_trigger = opal_fadump_trigger, + .fadump_max_boot_mem_rgns = opal_fadump_max_boot_mem_rgns, }; void __init opal_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) diff --git a/arch/powerpc/platforms/pseries/rtas-fadump.c b/arch/powerpc/platforms/pseries/rtas-fadump.c index 214f37788b2d..4db78b2bb2a8 100644 --- a/arch/powerpc/platforms/pseries/rtas-fadump.c +++ b/arch/powerpc/platforms/pseries/rtas-fadump.c @@ -29,9 +29,6 @@ static const struct rtas_fadump_mem_struct *fdm_active; static void rtas_fadump_update_config(struct fw_dump *fadump_conf, const struct rtas_fadump_mem_struct *fdm) { - fadump_conf->boot_mem_dest_addr = - be64_to_cpu(fdm->rmr_region.destination_address); - fadump_conf->fadumphdr_addr = (fadump_conf->boot_mem_dest_addr + fadump_conf->boot_memory_size); } @@ -43,20 +40,53 @@ static void rtas_fadump_update_config(struct fw_dump *fadump_conf, static void __init rtas_fadump_get_config(struct fw_dump *fadump_conf, const struct rtas_fadump_mem_struct *fdm) { - fadump_conf->boot_mem_addr[0] = - be64_to_cpu(fdm->rmr_region.source_address); - fadump_conf->boot_mem_sz[0] = be64_to_cpu(fdm->rmr_region.source_len); - fadump_conf->boot_memory_size = fadump_conf->boot_mem_sz[0]; + unsigned long base, size, last_end, hole_size; - fadump_conf->boot_mem_top = fadump_conf->boot_memory_size; - fadump_conf->boot_mem_regs_cnt = 1; + last_end = 0; + hole_size = 0; + fadump_conf->boot_memory_size = 0; + fadump_conf->boot_mem_regs_cnt = 0; + pr_debug("Boot memory regions:\n"); + for (int i = 0; i < be16_to_cpu(fdm->header.dump_num_sections); i++) { + int type = be16_to_cpu(fdm->rgn[i].source_data_type); + u64 addr; - /* - * Start address of reserve dump area (permanent reservation) for - * re-registering FADump after dump capture. - */ - fadump_conf->reserve_dump_area_start = - be64_to_cpu(fdm->cpu_state_data.destination_address); + switch (type) { + case RTAS_FADUMP_CPU_STATE_DATA: + addr = be64_to_cpu(fdm->rgn[i].destination_address); + + fadump_conf->cpu_state_dest_vaddr = (u64)__va(addr); + /* + * Start address of reserve dump area (permanent reservation) for + * re-registering FADump after dump capture. + */ + fadump_conf->reserve_dump_area_start = addr; + break; + case RTAS_FADUMP_HPTE_REGION: + /* Not processed currently. */ + break; + case RTAS_FADUMP_REAL_MODE_REGION: + base = be64_to_cpu(fdm->rgn[i].source_address); + size = be64_to_cpu(fdm->rgn[i].source_len); + pr_debug("\t[%03d] base: 0x%lx, size: 0x%lx\n", i, base, size); + if (!base) { + fadump_conf->boot_mem_dest_addr = + be64_to_cpu(fdm->rgn[i].destination_address); + } + + fadump_conf->boot_mem_addr[fadump_conf->boot_mem_regs_cnt] = base; + fadump_conf->boot_mem_sz[fadump_conf->boot_mem_regs_cnt] = size; + fadump_conf->boot_memory_size += size; + hole_size += (base - last_end); + last_end = base + size; + fadump_conf->boot_mem_regs_cnt++; + break; + default: + pr_warn("Section type %d unsupported on this kernel. Ignoring!\n", type); + break; + } + } + fadump_conf->boot_mem_top = fadump_conf->boot_memory_size + hole_size; rtas_fadump_update_config(fadump_conf, fdm); } @@ -64,16 +94,15 @@ static void __init rtas_fadump_get_config(struct fw_dump *fadump_conf, static u64 rtas_fadump_init_mem_struct(struct fw_dump *fadump_conf) { u64 addr = fadump_conf->reserve_dump_area_start; + u16 sec_cnt = 0; memset(&fdm, 0, sizeof(struct rtas_fadump_mem_struct)); addr = addr & PAGE_MASK; fdm.header.dump_format_version = cpu_to_be32(0x00000001); - fdm.header.dump_num_sections = cpu_to_be16(3); fdm.header.dump_status_flag = 0; fdm.header.offset_first_dump_section = - cpu_to_be32((u32)offsetof(struct rtas_fadump_mem_struct, - cpu_state_data)); + cpu_to_be32((u32)offsetof(struct rtas_fadump_mem_struct, rgn)); /* * Fields for disk dump option. @@ -89,25 +118,22 @@ static u64 rtas_fadump_init_mem_struct(struct fw_dump *fadump_conf) /* Kernel dump sections */ /* cpu state data section. */ - fdm.cpu_state_data.request_flag = - cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); - fdm.cpu_state_data.source_data_type = - cpu_to_be16(RTAS_FADUMP_CPU_STATE_DATA); - fdm.cpu_state_data.source_address = 0; - fdm.cpu_state_data.source_len = - cpu_to_be64(fadump_conf->cpu_state_data_size); - fdm.cpu_state_data.destination_address = cpu_to_be64(addr); + fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); + fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_CPU_STATE_DATA); + fdm.rgn[sec_cnt].source_address = 0; + fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->cpu_state_data_size); + fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr); addr += fadump_conf->cpu_state_data_size; + sec_cnt++; /* hpte region section */ - fdm.hpte_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); - fdm.hpte_region.source_data_type = - cpu_to_be16(RTAS_FADUMP_HPTE_REGION); - fdm.hpte_region.source_address = 0; - fdm.hpte_region.source_len = - cpu_to_be64(fadump_conf->hpte_region_size); - fdm.hpte_region.destination_address = cpu_to_be64(addr); + fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); + fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_HPTE_REGION); + fdm.rgn[sec_cnt].source_address = 0; + fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->hpte_region_size); + fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr); addr += fadump_conf->hpte_region_size; + sec_cnt++; /* * Align boot memory area destination address to page boundary to @@ -115,15 +141,20 @@ static u64 rtas_fadump_init_mem_struct(struct fw_dump *fadump_conf) */ addr = PAGE_ALIGN(addr); - /* RMA region section */ - fdm.rmr_region.request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); - fdm.rmr_region.source_data_type = - cpu_to_be16(RTAS_FADUMP_REAL_MODE_REGION); - fdm.rmr_region.source_address = cpu_to_be64(0); - fdm.rmr_region.source_len = cpu_to_be64(fadump_conf->boot_memory_size); - fdm.rmr_region.destination_address = cpu_to_be64(addr); - addr += fadump_conf->boot_memory_size; + /* First boot memory region destination address */ + fadump_conf->boot_mem_dest_addr = addr; + for (int i = 0; i < fadump_conf->boot_mem_regs_cnt; i++) { + /* Boot memory regions */ + fdm.rgn[sec_cnt].request_flag = cpu_to_be32(RTAS_FADUMP_REQUEST_FLAG); + fdm.rgn[sec_cnt].source_data_type = cpu_to_be16(RTAS_FADUMP_REAL_MODE_REGION); + fdm.rgn[sec_cnt].source_address = cpu_to_be64(fadump_conf->boot_mem_addr[i]); + fdm.rgn[sec_cnt].source_len = cpu_to_be64(fadump_conf->boot_mem_sz[i]); + fdm.rgn[sec_cnt].destination_address = cpu_to_be64(addr); + addr += fadump_conf->boot_mem_sz[i]; + sec_cnt++; + } + fdm.header.dump_num_sections = cpu_to_be16(sec_cnt); rtas_fadump_update_config(fadump_conf, &fdm); return addr; @@ -136,14 +167,21 @@ static u64 rtas_fadump_get_bootmem_min(void) static int rtas_fadump_register(struct fw_dump *fadump_conf) { - unsigned int wait_time; + unsigned int wait_time, fdm_size; int rc, err = -EIO; + /* + * Platform requires the exact size of the Dump Memory Structure. + * Avoid including any unused rgns in the calculation, as this + * could result in a parameter error (-3) from the platform. + */ + fdm_size = sizeof(struct rtas_fadump_section_header); + fdm_size += be16_to_cpu(fdm.header.dump_num_sections) * sizeof(struct rtas_fadump_section); + /* TODO: Add upper time limit for the delay */ do { rc = rtas_call(fadump_conf->ibm_configure_kernel_dump, 3, 1, - NULL, FADUMP_REGISTER, &fdm, - sizeof(struct rtas_fadump_mem_struct)); + NULL, FADUMP_REGISTER, &fdm, fdm_size); wait_time = rtas_busy_delay_time(rc); if (wait_time) @@ -161,9 +199,7 @@ static int rtas_fadump_register(struct fw_dump *fadump_conf) pr_err("Failed to register. Hardware Error(%d).\n", rc); break; case -3: - if (!is_fadump_boot_mem_contiguous()) - pr_err("Can't have holes in boot memory area.\n"); - else if (!is_fadump_reserved_mem_contiguous()) + if (!is_fadump_reserved_mem_contiguous()) pr_err("Can't have holes in reserved memory area.\n"); pr_err("Failed to register. Parameter Error(%d).\n", rc); @@ -316,11 +352,9 @@ static int __init rtas_fadump_build_cpu_notes(struct fw_dump *fadump_conf) u32 num_cpus, *note_buf; int i, rc = 0, cpu = 0; struct pt_regs regs; - unsigned long addr; void *vaddr; - addr = be64_to_cpu(fdm_active->cpu_state_data.destination_address); - vaddr = __va(addr); + vaddr = (void *)fadump_conf->cpu_state_dest_vaddr; reg_header = vaddr; if (be64_to_cpu(reg_header->magic_number) != @@ -395,18 +429,42 @@ static int __init rtas_fadump_process(struct fw_dump *fadump_conf) return -EINVAL; /* Check if the dump data is valid. */ - if ((be16_to_cpu(fdm_active->header.dump_status_flag) == - RTAS_FADUMP_ERROR_FLAG) || - (fdm_active->cpu_state_data.error_flags != 0) || - (fdm_active->rmr_region.error_flags != 0)) { - pr_err("Dump taken by platform is not valid\n"); - return -EINVAL; - } - if ((fdm_active->rmr_region.bytes_dumped != - fdm_active->rmr_region.source_len) || - !fdm_active->cpu_state_data.bytes_dumped) { - pr_err("Dump taken by platform is incomplete\n"); - return -EINVAL; + for (int i = 0; i < be16_to_cpu(fdm_active->header.dump_num_sections); i++) { + int type = be16_to_cpu(fdm_active->rgn[i].source_data_type); + int rc = 0; + + switch (type) { + case RTAS_FADUMP_CPU_STATE_DATA: + case RTAS_FADUMP_HPTE_REGION: + case RTAS_FADUMP_REAL_MODE_REGION: + if (fdm_active->rgn[i].error_flags != 0) { + pr_err("Dump taken by platform is not valid (%d)\n", i); + rc = -EINVAL; + } + if (fdm_active->rgn[i].bytes_dumped != fdm_active->rgn[i].source_len) { + pr_err("Dump taken by platform is incomplete (%d)\n", i); + rc = -EINVAL; + } + if (rc) { + pr_warn("Region type: %u src addr: 0x%llx dest addr: 0x%llx\n", + be16_to_cpu(fdm_active->rgn[i].source_data_type), + be64_to_cpu(fdm_active->rgn[i].source_address), + be64_to_cpu(fdm_active->rgn[i].destination_address)); + return rc; + } + break; + default: + /* + * If the first/crashed kernel added a new region type that the + * second/fadump kernel doesn't recognize, skip it and process + * assuming backward compatibility. + */ + pr_warn("Unknown region found: type: %u src addr: 0x%llx dest addr: 0x%llx\n", + be16_to_cpu(fdm_active->rgn[i].source_data_type), + be64_to_cpu(fdm_active->rgn[i].source_address), + be64_to_cpu(fdm_active->rgn[i].destination_address)); + break; + } } return rtas_fadump_build_cpu_notes(fadump_conf); @@ -415,7 +473,6 @@ static int __init rtas_fadump_process(struct fw_dump *fadump_conf) static void rtas_fadump_region_show(struct fw_dump *fadump_conf, struct seq_file *m) { - const struct rtas_fadump_section *cpu_data_section; const struct rtas_fadump_mem_struct *fdm_ptr; if (fdm_active) @@ -423,27 +480,42 @@ static void rtas_fadump_region_show(struct fw_dump *fadump_conf, else fdm_ptr = &fdm; - cpu_data_section = &(fdm_ptr->cpu_state_data); - seq_printf(m, "CPU :[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n", - be64_to_cpu(cpu_data_section->destination_address), - be64_to_cpu(cpu_data_section->destination_address) + - be64_to_cpu(cpu_data_section->source_len) - 1, - be64_to_cpu(cpu_data_section->source_len), - be64_to_cpu(cpu_data_section->bytes_dumped)); - - seq_printf(m, "HPTE:[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n", - be64_to_cpu(fdm_ptr->hpte_region.destination_address), - be64_to_cpu(fdm_ptr->hpte_region.destination_address) + - be64_to_cpu(fdm_ptr->hpte_region.source_len) - 1, - be64_to_cpu(fdm_ptr->hpte_region.source_len), - be64_to_cpu(fdm_ptr->hpte_region.bytes_dumped)); - - seq_printf(m, "DUMP: Src: %#016llx, Dest: %#016llx, ", - be64_to_cpu(fdm_ptr->rmr_region.source_address), - be64_to_cpu(fdm_ptr->rmr_region.destination_address)); - seq_printf(m, "Size: %#llx, Dumped: %#llx bytes\n", - be64_to_cpu(fdm_ptr->rmr_region.source_len), - be64_to_cpu(fdm_ptr->rmr_region.bytes_dumped)); + + for (int i = 0; i < be16_to_cpu(fdm_ptr->header.dump_num_sections); i++) { + int type = be16_to_cpu(fdm_ptr->rgn[i].source_data_type); + + switch (type) { + case RTAS_FADUMP_CPU_STATE_DATA: + seq_printf(m, "CPU :[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n", + be64_to_cpu(fdm_ptr->rgn[i].destination_address), + be64_to_cpu(fdm_ptr->rgn[i].destination_address) + + be64_to_cpu(fdm_ptr->rgn[i].source_len) - 1, + be64_to_cpu(fdm_ptr->rgn[i].source_len), + be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped)); + break; + case RTAS_FADUMP_HPTE_REGION: + seq_printf(m, "HPTE:[%#016llx-%#016llx] %#llx bytes, Dumped: %#llx\n", + be64_to_cpu(fdm_ptr->rgn[i].destination_address), + be64_to_cpu(fdm_ptr->rgn[i].destination_address) + + be64_to_cpu(fdm_ptr->rgn[i].source_len) - 1, + be64_to_cpu(fdm_ptr->rgn[i].source_len), + be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped)); + break; + case RTAS_FADUMP_REAL_MODE_REGION: + seq_printf(m, "DUMP: Src: %#016llx, Dest: %#016llx, ", + be64_to_cpu(fdm_ptr->rgn[i].source_address), + be64_to_cpu(fdm_ptr->rgn[i].destination_address)); + seq_printf(m, "Size: %#llx, Dumped: %#llx bytes\n", + be64_to_cpu(fdm_ptr->rgn[i].source_len), + be64_to_cpu(fdm_ptr->rgn[i].bytes_dumped)); + break; + default: + seq_printf(m, "Unknown region type %d : Src: %#016llx, Dest: %#016llx, ", + type, be64_to_cpu(fdm_ptr->rgn[i].source_address), + be64_to_cpu(fdm_ptr->rgn[i].destination_address)); + break; + } + } /* Dump is active. Show preserved area start address. */ if (fdm_active) { @@ -459,6 +531,20 @@ static void rtas_fadump_trigger(struct fadump_crash_info_header *fdh, rtas_os_term((char *)msg); } +/* FADUMP_MAX_MEM_REGS or lower */ +static int rtas_fadump_max_boot_mem_rgns(void) +{ + /* + * Version 1 of Kernel Assisted Dump Memory Structure (PAPR) supports 10 sections. + * With one each section taken for CPU state data & HPTE respectively, 8 sections + * can be used for boot memory regions. + * + * If new region(s) is(are) defined, maximum boot memory regions will decrease + * proportionally. + */ + return RTAS_FADUMP_MAX_BOOT_MEM_REGS; +} + static struct fadump_ops rtas_fadump_ops = { .fadump_init_mem_struct = rtas_fadump_init_mem_struct, .fadump_get_bootmem_min = rtas_fadump_get_bootmem_min, @@ -468,6 +554,7 @@ static struct fadump_ops rtas_fadump_ops = { .fadump_process = rtas_fadump_process, .fadump_region_show = rtas_fadump_region_show, .fadump_trigger = rtas_fadump_trigger, + .fadump_max_boot_mem_rgns = rtas_fadump_max_boot_mem_rgns, }; void __init rtas_fadump_dt_scan(struct fw_dump *fadump_conf, u64 node) diff --git a/arch/powerpc/platforms/pseries/rtas-fadump.h b/arch/powerpc/platforms/pseries/rtas-fadump.h index fd59bd7ca9c3..6740f4981bb8 100644 --- a/arch/powerpc/platforms/pseries/rtas-fadump.h +++ b/arch/powerpc/platforms/pseries/rtas-fadump.h @@ -29,6 +29,15 @@ /* Dump status flag */ #define RTAS_FADUMP_ERROR_FLAG 0x2000 +/* + * The Firmware Assisted Dump Memory structure supports a maximum of 10 sections + * in the dump memory structure. Presently, first two sections are used for + * CPU and HPTE data, while the remaining eight sections can be used for + * boot memory regions. + */ +#define MAX_SECTIONS 10 +#define RTAS_FADUMP_MAX_BOOT_MEM_REGS 8 + /* Kernel Dump section info */ struct rtas_fadump_section { __be32 request_flag; @@ -61,20 +70,15 @@ struct rtas_fadump_section_header { * Firmware Assisted dump memory structure. This structure is required for * registering future kernel dump with power firmware through rtas call. * - * No disk dump option. Hence disk dump path string section is not included. + * In version 1, the platform permits one section header, dump-disk path + * and ten sections. + * + * Note: No disk dump option. Hence disk dump path string section is not + * included. */ struct rtas_fadump_mem_struct { struct rtas_fadump_section_header header; - - /* Kernel dump sections */ - struct rtas_fadump_section cpu_state_data; - struct rtas_fadump_section hpte_region; - - /* - * TODO: Extend multiple boot memory regions support in the kernel - * for this platform. - */ - struct rtas_fadump_section rmr_region; + struct rtas_fadump_section rgn[MAX_SECTIONS]; }; /* |