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mbedtls: add mbedtls into the build system

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Port mbedtls with adapted libc header files.
Add mbedtls default config header file.
Optimize mbedtls default config by disabling unused features to
reduce the target size.
Add mbedtls kbuild makefile.
Add Kconfig skeleton and config submenu entry for selecting
crypto libraries between mbedtls and legacy ones.
Add the mbedtls include directories into the build system.
Port u-boot hash functions as MbedTLS crypto alternatives and set
it as default.

Subsequent patches will separate those Kconfigs into pairs of
_LEGACY and _MBEDTLS for controlling the implementations of legacy
crypto libraries and MbedTLS ones respectively.

The motivation of moving and adapting *INT* macros from kernel.h
to limits.h is to fulfill the MbedTLS building requirement.
The conditional compilation statements in MbedTLS expects the
*INT* macros as constant expressions, thus expressions like
`((int)(~0U >> 1))` will not work.

Prerequisite
------------

This patch series requires mbedtls git repo to be added as a
subtree to the main U-Boot repo via:

$ git subtree add --prefix lib/mbedtls/external/mbedtls \
      https://github.com/Mbed-TLS/mbedtls.git \
      v3.6.0 --squash

Moreover, due to the Windows-style files from mbedtls git repo,
we need to convert the CRLF endings to LF and do a commit manually:

$ git add --renormalize .
$ git commit

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
This commit is contained in:
Raymond Mao
2024-10-03 14:50:15 -07:00
committed by Tom Rini
parent 25ce987bb9
commit 13de848338
14 changed files with 488 additions and 12 deletions
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13
include/linux/kernel.h
View File

@@ -3,25 +3,18 @@
#include <linux/types.h>
#include <linux/printk.h> /* for printf/pr_* utilities */
#include <limits.h>
#define USHRT_MAX ((u16)(~0U))
#define SHRT_MAX ((s16)(USHRT_MAX>>1))
#define SHRT_MIN ((s16)(-SHRT_MAX - 1))
#define INT_MAX ((int)(~0U>>1))
#define INT_MIN (-INT_MAX - 1)
#define UINT_MAX (~0U)
#define LONG_MAX ((long)(~0UL>>1))
#define LONG_MIN (-LONG_MAX - 1)
#define ULONG_MAX (~0UL)
#define LLONG_MAX ((long long)(~0ULL>>1))
#define LLONG_MIN (-LLONG_MAX - 1)
#define ULLONG_MAX (~0ULL)
#ifndef SIZE_MAX
#define SIZE_MAX (~(size_t)0)
#endif
#ifndef SSIZE_MAX
#define SSIZE_MAX ((ssize_t)(SIZE_MAX >> 1))
#endif
#define U8_MAX ((u8)~0U)
#define S8_MAX ((s8)(U8_MAX>>1))
@@ -36,10 +29,6 @@
#define S64_MAX ((s64)(U64_MAX>>1))
#define S64_MIN ((s64)(-S64_MAX - 1))
/* Aliases defined by stdint.h */
#define UINT32_MAX U32_MAX
#define UINT64_MAX U64_MAX
#define INT32_MAX S32_MAX
#define STACK_MAGIC 0xdeadbeef