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Add VbSharedData field parsing

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R=reinauer@chromium.org
BUG=chrome-os-partner:2578
TEST=manual

crossystem vdat_timers
should show 'LFS=0,0 LF=number1,number2 LK=number3,number4'
where number1 < number2 < number3 < number4

crossystem vdat_lfdebug
run from a dev mode console, should show
'check=12,0 index=0x00 tpmver=(hex number) lowestver=(hex number)'

crossystem vdat_flags
run from a dev mode console, flags should be 0x04.

Review URL: http://codereview.chromium.org/6685068

Change-Id: Id7b958ae300d10cdcdc1b17a1bb17b7e5069166f
This commit is contained in:
Randall Spangler
2011-03-17 16:10:21 -07:00
parent 83c3714ed3
commit f4ba19d81d
8 changed files with 227 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
firmware/include/vboot_struct.h
View File

@@ -131,10 +131,38 @@ typedef struct VbKernelPreambleHeader {
#define EXPECTED_VBKERNELPREAMBLEHEADER_SIZE 96
/* Magic number for recognizing VbSharedDataHeader ("VbSD") */
#define VB_SHARED_DATA_MAGIC 0x44536256
/* Minimum and recommended size of shared_data_blob in bytes. */
#define VB_SHARED_DATA_MIN_SIZE 3072
#define VB_SHARED_DATA_REC_SIZE 16384
/* Flags for VbSharedDataHeader */
/* LoadFirmware() tried firmware B because of VbNvStorage firmware B tries */
#define VBSD_FWB_TRIED 0x00000001
/* LoadKernel() verified the kernel keyblock using the kernel subkey from
* the firmware. If this flag is not present, it just used the hash of the
* kernel keyblock. */
#define VBSD_KERNEL_KEY_VERIFIED 0x00000002
/* LoadFirmware() was told the developer switch was on */
#define VBSD_LF_DEV_SWITCH_ON 0x00000004
/* Result codes for checking firmware A and B */
#define VBSD_LF_CHECK_NOT_DONE 0
#define VBSD_LF_CHECK_DEV_MISMATCH 1
#define VBSD_LF_CHECK_REC_MISMATCH 2
#define VBSD_LF_CHECK_VERIFY_KEYBLOCK 3
#define VBSD_LF_CHECK_KEY_ROLLBACK 4
#define VBSD_LF_CHECK_DATA_KEY_PARSE 5
#define VBSD_LF_CHECK_VERIFY_PREAMBLE 6
#define VBSD_LF_CHECK_FW_ROLLBACK 7
#define VBSD_LF_CHECK_HEADER_VALID 8
#define VBSD_LF_CHECK_GET_FW_BODY 9
#define VBSD_LF_CHECK_HASH_WRONG_SIZE 10
#define VBSD_LF_CHECK_VERIFY_BODY 11
#define VBSD_LF_CHECK_VALID 12
/* Data shared between LoadFirmware(), LoadKernel(), and OS.
*
* The boot process is:
@@ -149,18 +177,19 @@ typedef struct VbKernelPreambleHeader {
* For example, via ACPI or ATAGs. */
typedef struct VbSharedDataHeader {
/* Fields present in version 1 */
uint32_t magic; /* Magic number for struct
* (VB_SHARED_DATA_MAGIC) */
uint32_t struct_version; /* Version of this structure */
uint64_t struct_size; /* Size of this structure in bytes */
uint64_t data_size; /* Size of shared data buffer in bytes */
uint64_t data_used; /* Amount of shared data used so far */
uint32_t flags; /* Flags */
VbPublicKey kernel_subkey; /* Kernel subkey, from firmware */
uint64_t kernel_subkey_data_offset; /* Offset of kernel subkey data from
* start of this struct */
uint64_t kernel_subkey_data_size; /* Size of kernel subkey data */
uint64_t flags; /* Flags */
/* Timer values from VbGetTimer(). Unused values are set to 0. If a
* function is called mutiple times, these are the times from the
* most recent call. */
@@ -171,6 +200,13 @@ typedef struct VbSharedDataHeader {
uint64_t timer_load_kernel_enter; /* LoadKernel() - enter */
uint64_t timer_load_kernel_exit; /* LoadKernel() - exit */
uint8_t check_fw_a_result; /* Result of checking RW firmware A */
uint8_t check_fw_b_result; /* Result of checking RW firmware B */
uint8_t firmware_index; /* Firmware index returned by
* LoadFirmware() or 0xFF if failure */
uint32_t fw_version_tpm_start; /* Firmware TPM version at start */
uint32_t fw_version_lowest; /* Firmware lowest version found */
/* After read-only firmware which uses version 1 is released, any additional
* fields must be added below, and the struct version must be increased.
* Before reading/writing those fields, make sure that the struct being