diff options
Diffstat (limited to 'boot/bootm.c')
| -rw-r--r-- | boot/bootm.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/boot/bootm.c b/boot/bootm.c index b1c3afe0a3a..11b6b3c2921 100644 --- a/boot/bootm.c +++ b/boot/bootm.c @@ -22,6 +22,7 @@ #include <asm/global_data.h> #include <asm/io.h> #include <linux/sizes.h> +#include <tpm-v2.h> #if defined(CONFIG_CMD_USB) #include <usb.h> #endif @@ -673,6 +674,75 @@ int bootm_process_cmdline_env(int flags) return 0; } +int bootm_measure(struct bootm_headers *images) +{ + int ret = 0; + + /* Skip measurement if EFI is going to do it */ + if (images->os.os == IH_OS_EFI && + IS_ENABLED(CONFIG_EFI_TCG2_PROTOCOL) && + IS_ENABLED(CONFIG_BOOTM_EFI)) + return ret; + + if (IS_ENABLED(CONFIG_MEASURED_BOOT)) { + struct tcg2_event_log elog; + struct udevice *dev; + void *initrd_buf; + void *image_buf; + const char *s; + u32 rd_len; + bool ign; + + elog.log_size = 0; + ign = IS_ENABLED(CONFIG_MEASURE_IGNORE_LOG); + ret = tcg2_measurement_init(&dev, &elog, ign); + if (ret) + return ret; + + image_buf = map_sysmem(images->os.image_start, + images->os.image_len); + ret = tcg2_measure_data(dev, &elog, 8, images->os.image_len, + image_buf, EV_COMPACT_HASH, + strlen("linux") + 1, (u8 *)"linux"); + if (ret) + goto unmap_image; + + rd_len = images->rd_end - images->rd_start; + initrd_buf = map_sysmem(images->rd_start, rd_len); + ret = tcg2_measure_data(dev, &elog, 9, rd_len, initrd_buf, + EV_COMPACT_HASH, strlen("initrd") + 1, + (u8 *)"initrd"); + if (ret) + goto unmap_initrd; + + if (IS_ENABLED(CONFIG_MEASURE_DEVICETREE)) { + ret = tcg2_measure_data(dev, &elog, 0, images->ft_len, + (u8 *)images->ft_addr, + EV_TABLE_OF_DEVICES, + strlen("dts") + 1, + (u8 *)"dts"); + if (ret) + goto unmap_initrd; + } + + s = env_get("bootargs"); + if (!s) + s = ""; + ret = tcg2_measure_data(dev, &elog, 1, strlen(s) + 1, (u8 *)s, + EV_PLATFORM_CONFIG_FLAGS, + strlen(s) + 1, (u8 *)s); + +unmap_initrd: + unmap_sysmem(initrd_buf); + +unmap_image: + unmap_sysmem(image_buf); + tcg2_measurement_term(dev, &elog, ret != 0); + } + + return ret; +} + /** * Execute selected states of the bootm command. * @@ -724,6 +794,10 @@ int do_bootm_states(struct cmd_tbl *cmdtp, int flag, int argc, if (!ret && (states & BOOTM_STATE_FINDOTHER)) ret = bootm_find_other(cmdtp, flag, argc, argv); + if (IS_ENABLED(CONFIG_MEASURED_BOOT) && !ret && + (states & BOOTM_STATE_MEASURE)) + bootm_measure(images); + /* Load the OS */ if (!ret && (states & BOOTM_STATE_LOADOS)) { iflag = bootm_disable_interrupts(); |