image: Use the correct checks for CRC32

Add a host Kconfig for CRC32. With this we can use CONFIG_IS_ENABLED(CRC32)
directly in the host build, so drop the unnecessary indirection.

Add a few more conditions to SPL_CRC32 to avoid build failures as well as
TPL_CRC32. Also update hash.c to make crc32 optional and to actually take
notice of SPL_CRC32.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

diff --git a/common/hash.c b/common/hash.c
index 3b591ba..79202e1 100644 (file)
--- a/common/hash.c
+++ b/common/hash.c
@@ -178,7 +178,7 @@ static int hash_finish_crc16_ccitt(struct hash_algo *algo, void *ctx,
        return 0;
 }
 
-static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
+static int __maybe_unused hash_init_crc32(struct hash_algo *algo, void **ctxp)
 {
        uint32_t *ctx = malloc(sizeof(uint32_t));
        *ctx = 0;
@@ -186,15 +186,16 @@ static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
        return 0;
 }
 
-static int hash_update_crc32(struct hash_algo *algo, void *ctx,
-                            const void *buf, unsigned int size, int is_last)
+static int __maybe_unused hash_update_crc32(struct hash_algo *algo, void *ctx,
+                                           const void *buf, unsigned int size,
+                                           int is_last)
 {
        *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
        return 0;
 }
 
-static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
-                            int size)
+static int __maybe_unused hash_finish_crc32(struct hash_algo *algo, void *ctx,
+                                           void *dest_buf, int size)
 {
        if (size < algo->digest_size)
                return -1;
@@ -311,6 +312,7 @@ static struct hash_algo hash_algo[] = {
                .hash_update    = hash_update_crc16_ccitt,
                .hash_finish    = hash_finish_crc16_ccitt,
        },
+#if CONFIG_IS_ENABLED(CRC32)
        {
                .name           = "crc32",
                .digest_size    = 4,
@@ -320,6 +322,7 @@ static struct hash_algo hash_algo[] = {
                .hash_update    = hash_update_crc32,
                .hash_finish    = hash_finish_crc32,
        },
+#endif
 };
 
 /* Try to minimize code size for boards that don't want much hashing */

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index 8a8a971..17ce2f6 100644 (file)
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -419,7 +419,8 @@ config SYS_MMCSD_RAW_MODE_EMMC_BOOT_PARTITION
 
 config SPL_CRC32
        bool "Support CRC32"
-       default y if SPL_LEGACY_IMAGE_SUPPORT
+       default y if SPL_LEGACY_IMAGE_SUPPORT || SPL_EFI_PARTITION
+       default y if SPL_ENV_SUPPORT || TPL_BLOBLIST
        help
          Enable this to support CRC32 in uImages or FIT images within SPL.
          This is a 32-bit checksum value that can be used to verify images.
@@ -1419,6 +1420,16 @@ config TPL_BOOTROM_SUPPORT
          BOOT_DEVICE_BOOTROM (or fall-through to the next boot device in the
          boot device list, if not implemented for a given board)
 
+config TPL_CRC32
+       bool "Support CRC32 in TPL"
+       default y if TPL_ENV_SUPPORT || TPL_BLOBLIST
+       help
+         Enable this to support CRC32 in uImages or FIT images within SPL.
+         This is a 32-bit checksum value that can be used to verify images.
+         For FIT images, this is the least secure type of checksum, suitable
+         for detected accidental image corruption. For secure applications you
+         should consider SHA1 or SHA256.
+
 config TPL_DRIVERS_MISC
        bool "Support misc drivers in TPL"
        help

diff --git a/lib/Kconfig b/lib/Kconfig
index 64765ac..70bf8e7 100644 (file)
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -496,6 +496,11 @@ config SPL_MD5
          security applications, but it can be useful for providing a quick
          checksum of a block of data.
 
+config CRC32
+       def_bool y
+       help
+         Enables CRC32 support in U-Boot. This is normally required.
+
 config CRC32C
        bool
 

diff --git a/lib/Makefile b/lib/Makefile
index 454396f..5ddbc77 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -96,9 +96,7 @@ obj-y += display_options.o
 CFLAGS_display_options.o := $(if $(BUILD_TAG),-DBUILD_TAG='"$(BUILD_TAG)"')
 obj-$(CONFIG_BCH) += bch.o
 obj-$(CONFIG_MMC_SPI) += crc7.o
-#ifndef CONFIG_TPL_BUILD
-obj-y += crc32.o
-#endif
+obj-$(CONFIG_$(SPL_TPL_)CRC32) += crc32.o
 obj-$(CONFIG_CRC32C) += crc32c.o
 obj-y += ctype.o
 obj-y += div64.o

diff --git a/tools/Kconfig b/tools/Kconfig
index 8685c80..91ce8ae 100644 (file)
--- a/tools/Kconfig
+++ b/tools/Kconfig
@@ -9,6 +9,11 @@ config MKIMAGE_DTC_PATH
          some cases the system dtc may not support all required features
          and the path to a different version should be given here.
 
+config TOOLS_CRC32
+       def_bool y
+       help
+         Enable CRC32 support in the tools builds
+
 config TOOLS_LIBCRYPTO
        bool "Use OpenSSL's libcrypto library for host tools"
        default y