vboot: update vboot2 functions to use new vb2_error_t

To make explicit when vboot2 error codes should be returned,
use the new vb2_error_t type on all functions which return
VB2_ERROR_* constants.

Additionally, add required vboot submodule commit id e6700f4c:
    2019-07-31 14:12:30 +0800 - (vboot: update vboot2 functions to use new vb2_error_t)

NOTE: This patch was merged separately on the Chromium tree:
https://chromium-review.googlesource.com/c/1728499

BUG=b:124141368, chromium:988410
TEST=make clean && make test-abuild
BRANCH=none

Change-Id: I804c2b407e496d0c8eb9833be629b7c40118415c
Signed-off-by: Joel Kitching <kitching@google.com>
Cq-Depend: chromium:1728292
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34860
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

3rdparty/vboot

@@ -1 +1 @@
-Subproject commit a5afd01feb0b4b45adbcd8ab38ab8a2ef2a2ef67
+Subproject commit e6700f4c70fe72850ae4f3f5df19c9281ebcefc8

src/security/vboot/secdata_mock.c

@@ -38,38 +38,39 @@
 
 #include "antirollback.h"
 
-int vb2ex_tpm_clear_owner(struct vb2_context *ctx)
+vb2_error_t vb2ex_tpm_clear_owner(struct vb2_context *ctx)
 {
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_read_space_firmware(struct vb2_context *ctx)
+vb2_error_t antirollback_read_space_firmware(struct vb2_context *ctx)
 {
 	vb2api_secdata_create(ctx);
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_write_space_firmware(struct vb2_context *ctx)
+vb2_error_t antirollback_write_space_firmware(struct vb2_context *ctx)
 {
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_lock_space_firmware(void)
+vb2_error_t antirollback_lock_space_firmware(void)
 {
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_lock_space_rec_hash(void)
+vb2_error_t antirollback_lock_space_rec_hash(void)
 {
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_read_space_rec_hash(uint8_t *data, uint32_t size)
+vb2_error_t antirollback_read_space_rec_hash(uint8_t *data, uint32_t size)
 {
 	return VB2_SUCCESS;
 }
 
-uint32_t antirollback_write_space_rec_hash(const uint8_t *data, uint32_t size)
+vb2_error_t antirollback_write_space_rec_hash(const uint8_t *data,
+					      uint32_t size)
 {
 	return VB2_SUCCESS;
 }

src/security/vboot/secdata_tpm.c

@@ -474,7 +474,7 @@ uint32_t antirollback_write_space_rec_hash(const uint8_t *data, uint32_t size)
 	return write_secdata(REC_HASH_NV_INDEX, data, size);
 }
 
-int vb2ex_tpm_clear_owner(struct vb2_context *ctx)
+vb2_error_t vb2ex_tpm_clear_owner(struct vb2_context *ctx)
 {
 	uint32_t rv;
 	printk(BIOS_INFO, "Clearing TPM owner\n");

src/security/vboot/tpm_common.c

@@ -30,12 +30,12 @@ uint32_t vboot_setup_tpm(struct vb2_context *ctx)
 	return result;
 }
 
-uint32_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
+vb2_error_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
 			     enum vb2_pcr_digest which_digest)
 {
 	uint8_t buffer[VB2_PCR_DIGEST_RECOMMENDED_SIZE];
 	uint32_t size = sizeof(buffer);
-	int rv;
+	vb2_error_t rv;
 
 	rv = vb2api_get_pcr_digest(ctx, which_digest, buffer, &size);
 	if (rv != VB2_SUCCESS)

src/security/vboot/tpm_common.h

@@ -17,7 +17,7 @@
 uint32_t vboot_setup_tpm(struct vb2_context *ctx);
 
 /* vboot_extend_pcr function for vb2 context */
-uint32_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
+vb2_error_t vboot_extend_pcr(struct vb2_context *ctx, int pcr,
 			     enum vb2_pcr_digest which_digest);
 
 #else

src/security/vboot/vboot_logic.c

@@ -55,7 +55,7 @@ void vb2ex_printf(const char *func, const char *fmt, ...)
 	return;
 }
 
-int vb2ex_read_resource(struct vb2_context *ctx,
+vb2_error_t vb2ex_read_resource(struct vb2_context *ctx,
 				enum vb2_resource_index index,
 				uint32_t offset,
 				void *buf,
@@ -88,19 +88,21 @@ int vb2ex_read_resource(struct vb2_context *ctx,
 }
 
 /* No-op stubs that can be overridden by SoCs with hardware crypto support. */
-__weak int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
+__weak vb2_error_t vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
 					      uint32_t data_size)
 {
 	return VB2_ERROR_EX_HWCRYPTO_UNSUPPORTED;
 }
 
-__weak int vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size)
+__weak vb2_error_t vb2ex_hwcrypto_digest_extend(const uint8_t *buf,
+						uint32_t size)
 {
 	BUG(); /* Should never get called if init() returned an error. */
 	return VB2_ERROR_UNKNOWN;
 }
 
-__weak int vb2ex_hwcrypto_digest_finalize(uint8_t *digest, uint32_t digest_size)
+__weak vb2_error_t vb2ex_hwcrypto_digest_finalize(uint8_t *digest,
+						  uint32_t digest_size)
 {
 	BUG(); /* Should never get called if init() returned an error. */
 	return VB2_ERROR_UNKNOWN;
@@ -169,7 +171,8 @@ static int handle_digest_result(void *slot_hash, size_t slot_hash_sz)
 	return 0;
 }
 
-static int hash_body(struct vb2_context *ctx, struct region_device *fw_main)
+static vb2_error_t hash_body(struct vb2_context *ctx,
+			     struct region_device *fw_main)
 {
 	uint64_t load_ts;
 	uint32_t expected_size;
@@ -178,7 +181,7 @@ static int hash_body(struct vb2_context *ctx, struct region_device *fw_main)
 	const size_t hash_digest_sz = sizeof(hash_digest);
 	size_t block_size = sizeof(block);
 	size_t offset;
-	int rv;
+	vb2_error_t rv;
 
 	/* Clear the full digest so that any hash digests less than the
 	 * max have trailing zeros. */
@@ -313,7 +316,7 @@ void verstage_main(void)
 {
 	struct vb2_context ctx;
 	struct region_device fw_main;
-	int rv;
+	vb2_error_t rv;
 
 	timestamp_add_now(TS_START_VBOOT);
 

src/soc/rockchip/rk3288/crypto.c

@@ -68,7 +68,7 @@ struct rk3288_crypto {
 } *crypto = (void *)CRYPTO_BASE;
 check_member(rk3288_crypto, trng_dout[7], 0x220);
 
-int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
+vb2_error_t vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
 				       uint32_t data_size)
 {
 	if (hash_alg != VB2_HASH_SHA256) {
@@ -94,7 +94,7 @@ int vb2ex_hwcrypto_digest_init(enum vb2_hash_algorithm hash_alg,
 	return VB2_SUCCESS;
 }
 
-int vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size)
+vb2_error_t vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size)
 {
 	uint32_t intsts;
 
@@ -115,7 +115,8 @@ int vb2ex_hwcrypto_digest_extend(const uint8_t *buf, uint32_t size)
 	return VB2_SUCCESS;
 }
 
-int vb2ex_hwcrypto_digest_finalize(uint8_t *digest, uint32_t digest_size)
+vb2_error_t vb2ex_hwcrypto_digest_finalize(uint8_t *digest,
+					   uint32_t digest_size)
 {
 	uint32_t *dest = (uint32_t *)digest;
 	uint32_t *src = crypto->hash_dout;