diff options
Diffstat (limited to 'arch/s390/kernel/os_info.c')
| -rw-r--r-- | arch/s390/kernel/os_info.c | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/arch/s390/kernel/os_info.c b/arch/s390/kernel/os_info.c index ec0bd9457e90..94fa44776d0c 100644 --- a/arch/s390/kernel/os_info.c +++ b/arch/s390/kernel/os_info.c @@ -6,8 +6,7 @@ * Author(s): Michael Holzheu <holzheu@linux.vnet.ibm.com> */ -#define KMSG_COMPONENT "os_info" -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt +#define pr_fmt(fmt) "os_info: " fmt #include <linux/crash_dump.h> #include <linux/kernel.h> @@ -15,8 +14,11 @@ #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/sections.h> +#include <asm/ipl.h> /* * OS info structure has to be page aligned @@ -29,7 +31,7 @@ static struct os_info os_info __page_aligned_data; u32 os_info_csum(struct os_info *os_info) { int size = sizeof(*os_info) - offsetof(struct os_info, version_major); - return (__force u32)csum_partial(&os_info->version_major, size, 0); + return (__force u32)cksm(&os_info->version_major, size, 0); } /* @@ -43,13 +45,24 @@ 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; - os_info.entry[nr].csum = (__force u32)csum_partial(ptr, size, 0); + os_info.entry[nr].csum = (__force u32)cksm(ptr, size, 0); + os_info.csum = os_info_csum(&os_info); +} + +/* + * 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); } @@ -59,15 +72,24 @@ void os_info_entry_add(int nr, void *ptr, u64 size) void __init os_info_init(void) { struct lowcore *abs_lc; - unsigned long flags; + 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(&flags); + abs_lc = get_abs_lowcore(); abs_lc->os_info = __pa(&os_info); - put_abs_lowcore(abs_lc, flags); + put_abs_lowcore(abs_lc); } #ifdef CONFIG_CRASH_DUMP @@ -99,7 +121,7 @@ static void os_info_old_alloc(int nr, int align) msg = "copy failed"; goto fail_free; } - csum = (__force u32)csum_partial(buf_align, size, 0); + csum = (__force u32)cksm(buf_align, size, 0); if (csum != os_info_old->entry[nr].csum) { msg = "checksum failed"; goto fail_free; @@ -126,7 +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; @@ -158,7 +180,7 @@ fail: } /* - * Return pointer to os infor entry and its size + * Return pointer to os info entry and its size */ void *os_info_old_entry(int nr, unsigned long *size) { |