smbios: Fix calculating BIOS Release Date

BIOS Release Date must be in format mm/dd/yyyy and must be release date.
U-Boot currently sets BIOS Release Date from U_BOOT_DMI_DATE macro which is
generated from current build timestamp.

Fix this issue by setting U_BOOT_DMI_DATE macro to U-Boot version which is
better approximation of U-Boot release date than current build timestamp.
Current U-Boot versioning is in format yyyy.mm so as a day choose 01.

Some operating systems are using BIOS Release Date for detecting when was
SMBIOS table filled or if it could support some feature (e.g. BIOS from
1990 cannot support features invented in 2000). So this change also ensures
that recompiling U-Boot from same sources but in different year does not
change behavior of some operating systems.

Macro U_BOOT_DMI_DATE is not used in other file than lib/smbios.c
so remove it from global autogenerated files and also from Makefile.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/Makefile b/Makefile
index ca2432c8ce9d8f3620d5b5fd6be429e017059586..281b81d6cdfd33028f0d78270cba7c05125223cb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1905,7 +1905,6 @@ define filechk_timestamp.h
                        LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DATE "%b %d %C%y"'; \
                        LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TIME "%T"'; \
                        LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_TZ "%z"'; \
-                       LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
                        LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
                        LC_ALL=C $${DATE} -u -d "$${SOURCE_DATE}" +'#define U_BOOT_EPOCH %s'; \
                else \
@@ -1915,7 +1914,6 @@ define filechk_timestamp.h
                LC_ALL=C date +'#define U_BOOT_DATE "%b %d %C%y"'; \
                LC_ALL=C date +'#define U_BOOT_TIME "%T"'; \
                LC_ALL=C date +'#define U_BOOT_TZ "%z"'; \
-               LC_ALL=C date +'#define U_BOOT_DMI_DATE "%m/%d/%Y"'; \
                LC_ALL=C date +'#define U_BOOT_BUILD_DATE 0x%Y%m%d'; \
                LC_ALL=C date +'#define U_BOOT_EPOCH %s'; \
        fi)

diff --git a/doc/develop/version.rst b/doc/develop/version.rst
index a7797db41bb20b3842f67de371a6d70a13b03ce4..066901bcd2d92ddffa5e47dac5dcc0f25b06e0e7 100644 (file)
--- a/doc/develop/version.rst
+++ b/doc/develop/version.rst
@@ -84,7 +84,6 @@ fields. For example::
    #define U_BOOT_DATE "Jan 06 2021"     (US format only)
    #define U_BOOT_TIME "08:50:36"        (24-hour clock)
    #define U_BOOT_TZ "-0700"             (Time zone in hours)
-   #define U_BOOT_DMI_DATE "01/06/2021"  (US format only)
    #define U_BOOT_BUILD_DATE 0x20210106  (hex yyyymmdd format)
    #define U_BOOT_EPOCH 1609948236
 

diff --git a/lib/smbios.c b/lib/smbios.c
index b52e125eeb1401ad1d5b885abd429fbd248f8cf5..a892716d15940a96f4d93545ed11ea2a89e92fbc 100644 (file)
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <dm.h>
 #include <env.h>
+#include <linux/stringify.h>
 #include <mapmem.h>
 #include <smbios.h>
 #include <sysinfo.h>
@@ -18,6 +19,28 @@
 #include <dm/uclass-internal.h>
 #endif
 
+/* Safeguard for checking that U_BOOT_VERSION_NUM macros are compatible with U_BOOT_DMI */
+#if U_BOOT_VERSION_NUM < 2000 || U_BOOT_VERSION_NUM > 2099 || \
+    U_BOOT_VERSION_NUM_PATCH < 1 || U_BOOT_VERSION_NUM_PATCH > 12
+#error U_BOOT_VERSION_NUM macros are not compatible with DMI, fix U_BOOT_DMI macros
+#endif
+
+/*
+ * U_BOOT_DMI_DATE contains BIOS Release Date in format mm/dd/yyyy.
+ * BIOS Release Date is calculated from U-Boot version and fixed day 01.
+ * So for U-Boot version 2021.04 it is calculated as "04/01/2021".
+ * BIOS Release Date should contain date when code was released
+ * and not when it was built or compiled.
+ */
+#if U_BOOT_VERSION_NUM_PATCH < 10
+#define U_BOOT_DMI_MONTH "0" __stringify(U_BOOT_VERSION_NUM_PATCH)
+#else
+#define U_BOOT_DMI_MONTH __stringify(U_BOOT_VERSION_NUM_PATCH)
+#endif
+#define U_BOOT_DMI_DAY "01"
+#define U_BOOT_DMI_YEAR __stringify(U_BOOT_VERSION_NUM)
+#define U_BOOT_DMI_DATE U_BOOT_DMI_MONTH "/" U_BOOT_DMI_DAY "/" U_BOOT_DMI_YEAR
+
 DECLARE_GLOBAL_DATA_PTR;
 
 /**