diff options
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index bef06a1fafe9..b6997eb6e519 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -244,7 +244,21 @@ int intel_find_matching_signature(void *mc, unsigned int csig, int cpf) } EXPORT_SYMBOL_GPL(intel_find_matching_signature); -int intel_microcode_sanity_check(void *mc, bool print_err) +/** + * intel_microcode_sanity_check() - Sanity check microcode file. + * @mc: Pointer to the microcode file contents. + * @print_err: Display failure reason if true, silent if false. + * @hdr_type: Type of file, i.e. normal microcode file or In Field Scan file. + * Validate if the microcode header type matches with the type + * specified here. + * + * Validate certain header fields and verify if computed checksum matches + * with the one specified in the header. + * + * Return: 0 if the file passes all the checks, -EINVAL if any of the checks + * fail. + */ +int intel_microcode_sanity_check(void *mc, bool print_err, int hdr_type) { unsigned long total_size, data_size, ext_table_size; struct microcode_header_intel *mc_header = mc; @@ -261,9 +275,10 @@ int intel_microcode_sanity_check(void *mc, bool print_err) return -EINVAL; } - if (mc_header->ldrver != 1 || mc_header->hdrver != 1) { + if (mc_header->ldrver != 1 || mc_header->hdrver != hdr_type) { if (print_err) - pr_err("Error: invalid/unknown microcode update format.\n"); + pr_err("Error: invalid/unknown microcode update format. Header type %d\n", + mc_header->hdrver); return -EINVAL; } |