diff options
| -rw-r--r-- | arch/s390/include/asm/lowcore.h | 8 | ||||
| -rw-r--r-- | arch/s390/include/asm/os_info.h | 50 | ||||
| -rw-r--r-- | arch/s390/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/crash_dump.c | 37 | ||||
| -rw-r--r-- | arch/s390/kernel/ipl.c | 42 | ||||
| -rw-r--r-- | arch/s390/kernel/os_info.c | 169 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 3 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 13 |
8 files changed, 304 insertions, 20 deletions
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h index 4e69563bc956..a47c6e221a95 100644 --- a/arch/s390/include/asm/lowcore.h +++ b/arch/s390/include/asm/lowcore.h @@ -154,7 +154,9 @@ struct _lowcore { __u32 ipib; /* 0x0e00 */ __u32 ipib_checksum; /* 0x0e04 */ __u32 vmcore_info; /* 0x0e08 */ - __u8 pad_0x0e0c[0x0f00-0x0e0c]; /* 0x0e0c */ + __u8 pad_0x0e0c[0x0e18-0x0e0c]; /* 0x0e0c */ + __u32 os_info; /* 0x0e18 */ + __u8 pad_0x0e1c[0x0f00-0x0e1c]; /* 0x0e1c */ /* Extended facility list */ __u64 stfle_fac_list[32]; /* 0x0f00 */ @@ -301,7 +303,9 @@ struct _lowcore { __u64 ipib; /* 0x0e00 */ __u32 ipib_checksum; /* 0x0e08 */ __u64 vmcore_info; /* 0x0e0c */ - __u8 pad_0x0e14[0x0f00-0x0e14]; /* 0x0e14 */ + __u8 pad_0x0e14[0x0e18-0x0e14]; /* 0x0e14 */ + __u64 os_info; /* 0x0e18 */ + __u8 pad_0x0e20[0x0f00-0x0e20]; /* 0x0e20 */ /* Extended facility list */ __u64 stfle_fac_list[32]; /* 0x0f00 */ diff --git a/arch/s390/include/asm/os_info.h b/arch/s390/include/asm/os_info.h new file mode 100644 index 000000000000..d07518af09ea --- /dev/null +++ b/arch/s390/include/asm/os_info.h @@ -0,0 +1,50 @@ +/* + * OS info memory interface + * + * Copyright IBM Corp. 2012 + * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com> + */ +#ifndef _ASM_S390_OS_INFO_H +#define _ASM_S390_OS_INFO_H + +#define OS_INFO_VERSION_MAJOR 1 +#define OS_INFO_VERSION_MINOR 1 +#define OS_INFO_MAGIC 0x4f53494e464f535aULL /* OSINFOSZ */ + +#define OS_INFO_VMCOREINFO 0 +#define OS_INFO_REIPL_BLOCK 1 +#define OS_INFO_INIT_FN 2 + +struct os_info_entry { + u64 addr; + u64 size; + u32 csum; +} __packed; + +struct os_info { + u64 magic; + u32 csum; + u16 version_major; + u16 version_minor; + u64 crashkernel_addr; + u64 crashkernel_size; + struct os_info_entry entry[3]; + u8 reserved[4004]; +} __packed; + +void os_info_init(void); +void os_info_entry_add(int nr, void *ptr, u64 len); +void os_info_crashkernel_add(unsigned long base, unsigned long size); +u32 os_info_csum(struct os_info *os_info); + +#ifdef CONFIG_CRASH_DUMP +void *os_info_old_entry(int nr, unsigned long *size); +int copy_from_oldmem(void *dest, void *src, size_t count); +#else +static inline void *os_info_old_entry(int nr, unsigned long *size) +{ + return NULL; +} +#endif + +#endif /* _ASM_S390_OS_INFO_H */ diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index b21595090499..16b0b433f1f4 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -23,7 +23,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o \ processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o \ debug.o irq.o ipl.o dis.o diag.o mem_detect.o sclp.o vdso.o \ - sysinfo.o jump_label.o lgr.o + sysinfo.o jump_label.o lgr.o os_info.o obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o) obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o) diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index c383ce440d99..cc1172b26873 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -14,6 +14,7 @@ #include <linux/bootmem.h> #include <linux/elf.h> #include <asm/ipl.h> +#include <asm/os_info.h> #define PTR_ADD(x, y) (((char *) (x)) + ((unsigned long) (y))) #define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y))) @@ -51,7 +52,7 @@ ssize_t copy_oldmem_page(unsigned long pfn, char *buf, /* * Copy memory from old kernel */ -static int copy_from_oldmem(void *dest, void *src, size_t count) +int copy_from_oldmem(void *dest, void *src, size_t count) { unsigned long copied = 0; int rc; @@ -224,28 +225,44 @@ static void *nt_prpsinfo(void *ptr) } /* - * Initialize vmcoreinfo note (new kernel) + * Get vmcoreinfo using lowcore->vmcore_info (new kernel) */ -static void *nt_vmcoreinfo(void *ptr) +static void *get_vmcoreinfo_old(unsigned long *size) { char nt_name[11], *vmcoreinfo; Elf64_Nhdr note; void *addr; if (copy_from_oldmem(&addr, &S390_lowcore.vmcore_info, sizeof(addr))) - return ptr; + return NULL; memset(nt_name, 0, sizeof(nt_name)); if (copy_from_oldmem(¬e, addr, sizeof(note))) - return ptr; + return NULL; if (copy_from_oldmem(nt_name, addr + sizeof(note), sizeof(nt_name) - 1)) - return ptr; + return NULL; if (strcmp(nt_name, "VMCOREINFO") != 0) - return ptr; - vmcoreinfo = kzalloc_panic(note.n_descsz + 1); + return NULL; + vmcoreinfo = kzalloc_panic(note.n_descsz); if (copy_from_oldmem(vmcoreinfo, addr + 24, note.n_descsz)) + return NULL; + *size = note.n_descsz; + return vmcoreinfo; +} + +/* + * Initialize vmcoreinfo note (new kernel) + */ +static void *nt_vmcoreinfo(void *ptr) +{ + unsigned long size; + void *vmcoreinfo; + + vmcoreinfo = os_info_old_entry(OS_INFO_VMCOREINFO, &size); + if (!vmcoreinfo) + vmcoreinfo = get_vmcoreinfo_old(&size); + if (!vmcoreinfo) return ptr; - vmcoreinfo[note.n_descsz + 1] = 0; - return nt_init(ptr, 0, vmcoreinfo, note.n_descsz, "VMCOREINFO"); + return nt_init(ptr, 0, vmcoreinfo, size, "VMCOREINFO"); } /* diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 153e21ce2336..8342e65a140d 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -28,6 +28,7 @@ #include <asm/sclp.h> #include <asm/checksum.h> #include <asm/debug.h> +#include <asm/os_info.h> #include "entry.h" #define IPL_PARM_BLOCK_VERSION 0 @@ -951,6 +952,13 @@ static struct attribute_group reipl_nss_attr_group = { .attrs = reipl_nss_attrs, }; +static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block) +{ + reipl_block_actual = reipl_block; + os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, + reipl_block->hdr.len); +} + /* reipl type */ static int reipl_set_type(enum ipl_type type) @@ -966,7 +974,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_CCW_VM; else reipl_method = REIPL_METHOD_CCW_CIO; - reipl_block_actual = reipl_block_ccw; + set_reipl_block_actual(reipl_block_ccw); break; case IPL_TYPE_FCP: if (diag308_set_works) @@ -975,7 +983,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_FCP_RO_VM; else reipl_method = REIPL_METHOD_FCP_RO_DIAG; - reipl_block_actual = reipl_block_fcp; + set_reipl_block_actual(reipl_block_fcp); break; case IPL_TYPE_FCP_DUMP: reipl_method = REIPL_METHOD_FCP_DUMP; @@ -985,7 +993,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_NSS_DIAG; else reipl_method = REIPL_METHOD_NSS; - reipl_block_actual = reipl_block_nss; + set_reipl_block_actual(reipl_block_nss); break; case IPL_TYPE_UNKNOWN: reipl_method = REIPL_METHOD_DEFAULT; @@ -1257,6 +1265,29 @@ static int __init reipl_fcp_init(void) return 0; } +static int __init reipl_type_init(void) +{ + enum ipl_type reipl_type = ipl_info.type; + struct ipl_parameter_block *reipl_block; + unsigned long size; + + reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); + if (!reipl_block) + goto out; + /* + * If we have an OS info reipl block, this will be used + */ + if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) { + memcpy(reipl_block_fcp, reipl_block, size); + reipl_type = IPL_TYPE_FCP; + } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) { + memcpy(reipl_block_ccw, reipl_block, size); + reipl_type = IPL_TYPE_CCW; + } +out: + return reipl_set_type(reipl_type); +} + static int __init reipl_init(void) { int rc; @@ -1278,10 +1309,7 @@ static int __init reipl_init(void) rc = reipl_nss_init(); if (rc) return rc; - rc = reipl_set_type(ipl_info.type); - if (rc) - return rc; - return 0; + return reipl_type_init(); } static struct shutdown_action __refdata reipl_action = { diff --git a/arch/s390/kernel/os_info.c b/arch/s390/kernel/os_info.c new file mode 100644 index 000000000000..bbe522672e06 --- /dev/null +++ b/arch/s390/kernel/os_info.c @@ -0,0 +1,169 @@ +/* + * OS info memory interface + * + * Copyright IBM Corp. 2012 + * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com> + */ + +#define KMSG_COMPONENT "os_info" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/crash_dump.h> +#include <linux/kernel.h> +#include <asm/checksum.h> +#include <asm/lowcore.h> +#include <asm/system.h> +#include <asm/os_info.h> + +/* + * OS info structure has to be page aligned + */ +static struct os_info os_info __page_aligned_data; + +/* + * Compute checksum over OS info structure + */ +u32 os_info_csum(struct os_info *os_info) +{ + int size = sizeof(*os_info) - offsetof(struct os_info, version_major); + return csum_partial(&os_info->version_major, size, 0); +} + +/* + * Add crashkernel info to OS info and update checksum + */ +void os_info_crashkernel_add(unsigned long base, unsigned long size) +{ + os_info.crashkernel_addr = (u64)(unsigned long)base; + os_info.crashkernel_size = (u64)(unsigned long)size; + os_info.csum = os_info_csum(&os_info); +} + +/* + * Add OS info entry and update checksum + */ +void os_info_entry_add(int nr, void *ptr, u64 size) +{ + os_info.entry[nr].addr = (u64)(unsigned long)ptr; + os_info.entry[nr].size = size; + os_info.entry[nr].csum = csum_partial(ptr, size, 0); + os_info.csum = os_info_csum(&os_info); +} + +/* + * Initialize OS info struture and set lowcore pointer + */ +void __init os_info_init(void) +{ + void *ptr = &os_info; + + os_info.version_major = OS_INFO_VERSION_MAJOR; + os_info.version_minor = OS_INFO_VERSION_MINOR; + os_info.magic = OS_INFO_MAGIC; + os_info.csum = os_info_csum(&os_info); + copy_to_absolute_zero(&S390_lowcore.os_info, &ptr, sizeof(ptr)); +} + +#ifdef CONFIG_CRASH_DUMP + +static struct os_info *os_info_old; + +/* + * Allocate and copy OS info entry from oldmem + */ +static void os_info_old_alloc(int nr, int align) +{ + unsigned long addr, size = 0; + char *buf, *buf_align, *msg; + u32 csum; + + addr = os_info_old->entry[nr].addr; + if (!addr) { + msg = "not available"; + goto fail; + } + size = os_info_old->entry[nr].size; + buf = kmalloc(size + align - 1, GFP_KERNEL); + if (!buf) { + msg = "alloc failed"; + goto fail; + } + buf_align = PTR_ALIGN(buf, align); + if (copy_from_oldmem(buf_align, (void *) addr, size)) { + msg = "copy failed"; + goto fail_free; + } + csum = csum_partial(buf_align, size, 0); + if (csum != os_info_old->entry[nr].csum) { + msg = "checksum failed"; + goto fail_free; + } + os_info_old->entry[nr].addr = (u64)(unsigned long)buf_align; + msg = "copied"; + goto out; +fail_free: + kfree(buf); +fail: + os_info_old->entry[nr].addr = 0; +out: + pr_info("entry %i: %s (addr=0x%lx size=%lu)\n", + nr, msg, addr, size); +} + +/* + * Initialize os info and os info entries from oldmem + */ +static void os_info_old_init(void) +{ + static int os_info_init; + unsigned long addr; + + if (os_info_init) + return; + if (!OLDMEM_BASE) + goto fail; + if (copy_from_oldmem(&addr, &S390_lowcore.os_info, sizeof(addr))) + goto fail; + if (addr == 0 || addr % PAGE_SIZE) + goto fail; + os_info_old = kzalloc(sizeof(*os_info_old), GFP_KERNEL); + if (!os_info_old) + goto fail; + if (copy_from_oldmem(os_info_old, (void *) addr, sizeof(*os_info_old))) + goto fail_free; + if (os_info_old->magic != OS_INFO_MAGIC) + goto fail_free; + if (os_info_old->csum != os_info_csum(os_info_old)) + goto fail_free; + if (os_info_old->version_major > OS_INFO_VERSION_MAJOR) + goto fail_free; + os_info_old_alloc(OS_INFO_VMCOREINFO, 1); + os_info_old_alloc(OS_INFO_REIPL_BLOCK, 1); + os_info_old_alloc(OS_INFO_INIT_FN, PAGE_SIZE); + pr_info("crashkernel: addr=0x%lx size=%lu\n", + (unsigned long) os_info_old->crashkernel_addr, + (unsigned long) os_info_old->crashkernel_size); + os_info_init = 1; + return; +fail_free: + kfree(os_info_old); +fail: + os_info_init = 1; + os_info_old = NULL; +} + +/* + * Return pointer to os infor entry and its size + */ +void *os_info_old_entry(int nr, unsigned long *size) +{ + os_info_old_init(); + + if (!os_info_old) + return NULL; + if (!os_info_old->entry[nr].addr) + return NULL; + *size = (unsigned long) os_info_old->entry[nr].size; + return (void *)(unsigned long)os_info_old->entry[nr].addr; +} +#endif diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 9a3edb5f2c92..38e751278bf7 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -62,6 +62,7 @@ #include <asm/ebcdic.h> #include <asm/kvm_virtio.h> #include <asm/diag.h> +#include <asm/os_info.h> #include "entry.h" long psw_kernel_bits = PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_ASC_PRIMARY | @@ -778,6 +779,7 @@ static void __init reserve_crashkernel(void) pr_info("Reserving %lluMB of memory at %lluMB " "for crashkernel (System RAM: %luMB)\n", crash_size >> 20, crash_base >> 20, memory_end >> 20); + os_info_crashkernel_add(crash_base, crash_size); #endif } @@ -1057,6 +1059,7 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); + os_info_init(); setup_ipl(); setup_memory_end(); setup_addressing_mode(); diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index d15b6c937088..3b9e5c9f4c0b 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -41,6 +41,7 @@ #include <asm/sclp.h> #include <asm/vdso.h> #include <asm/debug.h> +#include <asm/os_info.h> #include "entry.h" enum { @@ -826,6 +827,17 @@ void __noreturn cpu_die(void) #endif /* CONFIG_HOTPLUG_CPU */ +static void smp_call_os_info_init_fn(void) +{ + int (*init_fn)(void); + unsigned long size; + + init_fn = os_info_old_entry(OS_INFO_INIT_FN, &size); + if (!init_fn) + return; + init_fn(); +} + void __init smp_prepare_cpus(unsigned int max_cpus) { /* request the 0x1201 emergency signal external interrupt */ @@ -834,6 +846,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) /* request the 0x1202 external call external interrupt */ if (register_external_interrupt(0x1202, do_ext_call_interrupt) != 0) panic("Couldn't request external interrupt 0x1202"); + smp_call_os_info_init_fn(); smp_detect_cpus(); } |