From bd654805933f70ed77e5a03921c31262d9347cc6 Mon Sep 17 00:00:00 2001 From: Richard Spiegel Date: Thu, 22 Feb 2018 10:03:39 -0700 Subject: src/arch/x86/smbios.c: Fix type 17 part number Some DIMMs have invalid strings when it comes to device part number (bytes 0x149-0x15c). From DDR4 SPD specs it should be ASCIIZ with unused space filled with white spaces (ASCII 0x20). Byte 20 should be 0 (ASCIIZ), all others should be ASCII. Create a test that detects invalid strings and replace invalid characters with *. If a replacement was made the output string then must be . BUG=b:73122207 TEST=Build, boot and record serial output for kahlee while injecting different strings to dmi17->PartNumber. Use code to examine SMBIOS, while testing different valid and invalid strings. Remove string injection before committing. Change-Id: Iead2a4cb14ff28d263d7214111b637e62ebd2921 Signed-off-by: Richard Spiegel Reviewed-on: https://review.coreboot.org/23844 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/arch/x86/smbios.c | 34 +++++++++++++++++++++++++++------- 1 file changed, 27 insertions(+), 7 deletions(-) (limited to 'src/arch') diff --git a/src/arch/x86/smbios.c b/src/arch/x86/smbios.c index 548e6ed741..e1743086e7 100644 --- a/src/arch/x86/smbios.c +++ b/src/arch/x86/smbios.c @@ -195,11 +195,34 @@ void smbios_fill_dimm_manufacturer_from_id(uint16_t mod_id, } } +/* This function will fill the corresponding part number */ +static void smbios_fill_dimm_part_number(char *part_number, + struct smbios_type17 *t) +{ + int i, invalid; + + invalid = 0; /* assume valid */ + for (i = 0; i < DIMM_INFO_PART_NUMBER_SIZE - 1; i++) { + if (part_number[i] < ' ') { + invalid = 1; + part_number[i] = '*'; + } + } + if (invalid) { + char string_buffer[64]; + + snprintf(string_buffer, sizeof(string_buffer), "Invalid (%s)", + part_number); + t->part_number = smbios_add_string(t->eos, string_buffer); + } else + t->part_number = smbios_add_string(t->eos, part_number); + +} + static int create_smbios_type17_for_dimm(struct dimm_info *dimm, unsigned long *current, int *handle) { struct smbios_type17 *t = (struct smbios_type17 *)*current; - uint8_t length; char locator[40]; memset(t, 0, sizeof(struct smbios_type17)); @@ -236,8 +259,7 @@ static int create_smbios_type17_for_dimm(struct dimm_info *dimm, smbios_fill_dimm_manufacturer_from_id(dimm->mod_id, t); /* put '\0' in the end of data */ - length = sizeof(dimm->serial); - dimm->serial[length - 1] = '\0'; + dimm->serial[DIMM_INFO_SERIAL_SIZE - 1] = '\0'; if (dimm->serial[0] == 0) t->serial_number = smbios_add_string(t->eos, "None"); else @@ -252,10 +274,8 @@ static int create_smbios_type17_for_dimm(struct dimm_info *dimm, t->bank_locator = smbios_add_string(t->eos, locator); /* put '\0' in the end of data */ - length = sizeof(dimm->module_part_number); - dimm->module_part_number[length - 1] = '\0'; - t->part_number = smbios_add_string(t->eos, - (const char *)dimm->module_part_number); + dimm->module_part_number[DIMM_INFO_PART_NUMBER_SIZE - 1] = '\0'; + smbios_fill_dimm_part_number((char *)dimm->module_part_number, t); /* Synchronous = 1 */ t->type_detail = 0x0080; -- cgit v1.2.3