1 /**
2 * Functions for generating pseudo-random CPER NVIDIA error sections.
3 *
4 **/
5
6 #include <stdlib.h>
7 #include <stddef.h>
8 #include <string.h>
9 #include <stdio.h>
10 #include "../../edk/BaseTypes.h"
11 #include "../gen-utils.h"
12 #include "gen-section.h"
13
14 //Generates a single pseudo-random NVIDIA error section, saving the resulting address to the given
15 //location. Returns the size of the newly created section.
generate_section_nvidia(void ** location)16 size_t generate_section_nvidia(void **location)
17 {
18 const char *signatures[] = {
19 "DCC-ECC", "DCC-COH", "HSS-BUSY", "HSS-IDLE",
20 "CLink", "C2C", "C2C-IP-FAIL", "L0 RESET",
21 "L1 RESET", "L2 RESET", "PCIe", "PCIe-DPC",
22 "SOCHUB", "CCPLEXSCF", "CMET-NULL", "CMET-SHA256",
23 "CMET-FULL", "DRAM-CHANNELS", "PAGES-RETIRED", "CCPLEXGIC",
24 "MCF", "GPU-STATUS", "GPU-CONTNMT", "SMMU",
25 };
26
27 init_random();
28
29 //Create random bytes.
30 int numRegs = 6;
31 size_t size = offsetof(EFI_NVIDIA_ERROR_DATA, Register) +
32 numRegs * sizeof(EFI_NVIDIA_REGISTER_DATA);
33 UINT8 *section = generate_random_bytes(size);
34
35 //Reserved byte.
36 EFI_NVIDIA_ERROR_DATA *nvidia_error = (EFI_NVIDIA_ERROR_DATA *)section;
37 nvidia_error->Reserved = 0;
38
39 //Number of Registers.
40 nvidia_error->NumberRegs = numRegs;
41
42 //Severity (0 to 3 as defined in UEFI spec).
43 nvidia_error->Severity %= 4;
44
45 //Signature.
46 int idx_random = rand() % (sizeof(signatures) / sizeof(signatures[0]));
47 strncpy(nvidia_error->Signature, signatures[idx_random],
48 sizeof(nvidia_error->Signature) - 1);
49 nvidia_error->Signature[sizeof(nvidia_error->Signature) - 1] = '\0';
50
51 //Set return values, exit.
52 *location = section;
53 return size;
54 }
55