diff options
Diffstat (limited to 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/efi.c | 30 | ||||
| -rw-r--r-- | arch/ia64/kernel/setup.c | 30 |
2 files changed, 60 insertions, 0 deletions
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index 32ce330cbc6..4061593e5b1 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -1183,3 +1183,33 @@ kdump_find_rsvd_region (unsigned long size, return ~0UL; } #endif + +#ifdef CONFIG_PROC_VMCORE +/* locate the size find a the descriptor at a certain address */ +unsigned long +vmcore_find_descriptor_size (unsigned long address) +{ + void *efi_map_start, *efi_map_end, *p; + efi_memory_desc_t *md; + u64 efi_desc_size; + unsigned long ret = 0; + + efi_map_start = __va(ia64_boot_param->efi_memmap); + efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; + efi_desc_size = ia64_boot_param->efi_memdesc_size; + + for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { + md = p; + if (efi_wb(md) && md->type == EFI_LOADER_DATA + && md->phys_addr == address) { + ret = efi_md_size(md); + break; + } + } + + if (ret == 0) + printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); + + return ret; +} +#endif diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 5fa09d141ab..7d6fe65c93f 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -251,6 +251,12 @@ reserve_memory (void) } #endif +#ifdef CONFIG_PROC_VMCORE + if (reserve_elfcorehdr(&rsvd_region[n].start, + &rsvd_region[n].end) == 0) + n++; +#endif + efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end); n++; @@ -453,6 +459,30 @@ static int __init parse_elfcorehdr(char *arg) return 0; } early_param("elfcorehdr", parse_elfcorehdr); + +int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end) +{ + unsigned long length; + + /* We get the address using the kernel command line, + * but the size is extracted from the EFI tables. + * Both address and size are required for reservation + * to work properly. + */ + + if (elfcorehdr_addr >= ELFCORE_ADDR_MAX) + return -EINVAL; + + if ((length = vmcore_find_descriptor_size(elfcorehdr_addr)) == 0) { + elfcorehdr_addr = ELFCORE_ADDR_MAX; + return -EINVAL; + } + + *start = (unsigned long)__va(elfcorehdr_addr); + *end = *start + length; + return 0; +} + #endif /* CONFIG_PROC_VMCORE */ void __init |