Simon Glass | e5a7b77 | 2022-07-30 15:52:37 -0600 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * Verified Boot for Embedded (VBE) command |
| 4 | * |
| 5 | * Copyright 2022 Google LLC |
| 6 | * Written by Simon Glass <sjg@chromium.org> |
| 7 | */ |
| 8 | |
| 9 | #include <common.h> |
| 10 | #include <bootmeth.h> |
| 11 | #include <bootstd.h> |
| 12 | #include <command.h> |
| 13 | #include <vbe.h> |
| 14 | |
| 15 | static int do_vbe_list(struct cmd_tbl *cmdtp, int flag, int argc, |
| 16 | char *const argv[]) |
| 17 | { |
| 18 | vbe_list(); |
| 19 | |
| 20 | return 0; |
| 21 | } |
| 22 | |
| 23 | static int do_vbe_select(struct cmd_tbl *cmdtp, int flag, int argc, |
| 24 | char *const argv[]) |
| 25 | { |
| 26 | struct bootstd_priv *std; |
| 27 | struct udevice *dev; |
| 28 | int ret; |
| 29 | |
| 30 | ret = bootstd_get_priv(&std); |
| 31 | if (ret) |
| 32 | return CMD_RET_FAILURE; |
| 33 | if (argc < 2) { |
| 34 | std->vbe_bootmeth = NULL; |
| 35 | return 0; |
| 36 | } |
| 37 | if (vbe_find_by_any(argv[1], &dev)) |
| 38 | return CMD_RET_FAILURE; |
| 39 | |
| 40 | std->vbe_bootmeth = dev; |
| 41 | |
| 42 | return 0; |
| 43 | } |
| 44 | |
| 45 | static int do_vbe_info(struct cmd_tbl *cmdtp, int flag, int argc, |
| 46 | char *const argv[]) |
| 47 | { |
| 48 | struct bootstd_priv *std; |
| 49 | char buf[256]; |
| 50 | int ret, len; |
| 51 | |
| 52 | ret = bootstd_get_priv(&std); |
| 53 | if (ret) |
| 54 | return CMD_RET_FAILURE; |
| 55 | if (!std->vbe_bootmeth) { |
| 56 | printf("No VBE bootmeth selected\n"); |
| 57 | return CMD_RET_FAILURE; |
| 58 | } |
| 59 | ret = bootmeth_get_state_desc(std->vbe_bootmeth, buf, sizeof(buf)); |
| 60 | if (ret) { |
| 61 | printf("Failed (err=%d)\n", ret); |
| 62 | return CMD_RET_FAILURE; |
| 63 | } |
| 64 | len = strnlen(buf, sizeof(buf)); |
| 65 | if (len >= sizeof(buf)) { |
| 66 | printf("Buffer overflow\n"); |
| 67 | return CMD_RET_FAILURE; |
| 68 | } |
| 69 | |
| 70 | puts(buf); |
| 71 | if (buf[len] != '\n') |
| 72 | putc('\n'); |
| 73 | |
| 74 | return 0; |
| 75 | } |
| 76 | |
| 77 | #ifdef CONFIG_SYS_LONGHELP |
| 78 | static char vbe_help_text[] = |
| 79 | "list - list VBE bootmeths\n" |
| 80 | "vbe select - select a VBE bootmeth by sequence or name\n" |
| 81 | "vbe info - show information about a VBE bootmeth"; |
| 82 | #endif |
| 83 | |
| 84 | U_BOOT_CMD_WITH_SUBCMDS(vbe, "Verified Boot for Embedded", vbe_help_text, |
| 85 | U_BOOT_SUBCMD_MKENT(list, 1, 1, do_vbe_list), |
| 86 | U_BOOT_SUBCMD_MKENT(select, 2, 1, do_vbe_select), |
| 87 | U_BOOT_SUBCMD_MKENT(info, 2, 1, do_vbe_info)); |