cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kconfig.h (2445B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _TOOLS_LINUX_KCONFIG_H
      3#define _TOOLS_LINUX_KCONFIG_H
      4
      5/* CONFIG_CC_VERSION_TEXT (Do not delete this comment. See help in Kconfig) */
      6
      7#define __ARG_PLACEHOLDER_1 0,
      8#define __take_second_arg(__ignored, val, ...) val
      9
     10/*
     11 * The use of "&&" / "||" is limited in certain expressions.
     12 * The following enable to calculate "and" / "or" with macro expansion only.
     13 */
     14#define __and(x, y)			___and(x, y)
     15#define ___and(x, y)			____and(__ARG_PLACEHOLDER_##x, y)
     16#define ____and(arg1_or_junk, y)	__take_second_arg(arg1_or_junk y, 0)
     17
     18#define __or(x, y)			___or(x, y)
     19#define ___or(x, y)			____or(__ARG_PLACEHOLDER_##x, y)
     20#define ____or(arg1_or_junk, y)		__take_second_arg(arg1_or_junk 1, y)
     21
     22/*
     23 * Helper macros to use CONFIG_ options in C/CPP expressions. Note that
     24 * these only work with boolean and tristate options.
     25 */
     26
     27/*
     28 * Getting something that works in C and CPP for an arg that may or may
     29 * not be defined is tricky.  Here, if we have "#define CONFIG_BOOGER 1"
     30 * we match on the placeholder define, insert the "0," for arg1 and generate
     31 * the triplet (0, 1, 0).  Then the last step cherry picks the 2nd arg (a one).
     32 * When CONFIG_BOOGER is not defined, we generate a (... 1, 0) pair, and when
     33 * the last step cherry picks the 2nd arg, we get a zero.
     34 */
     35#define __is_defined(x)			___is_defined(x)
     36#define ___is_defined(val)		____is_defined(__ARG_PLACEHOLDER_##val)
     37#define ____is_defined(arg1_or_junk)	__take_second_arg(arg1_or_junk 1, 0)
     38
     39/*
     40 * IS_BUILTIN(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y', 0
     41 * otherwise. For boolean options, this is equivalent to
     42 * IS_ENABLED(CONFIG_FOO).
     43 */
     44#define IS_BUILTIN(option) __is_defined(option)
     45
     46/*
     47 * IS_MODULE(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'm', 0
     48 * otherwise.
     49 */
     50#define IS_MODULE(option) __is_defined(option##_MODULE)
     51
     52/*
     53 * IS_REACHABLE(CONFIG_FOO) evaluates to 1 if the currently compiled
     54 * code can call a function defined in code compiled based on CONFIG_FOO.
     55 * This is similar to IS_ENABLED(), but returns false when invoked from
     56 * built-in code when CONFIG_FOO is set to 'm'.
     57 */
     58#define IS_REACHABLE(option) __or(IS_BUILTIN(option), \
     59				__and(IS_MODULE(option), __is_defined(MODULE)))
     60
     61/*
     62 * IS_ENABLED(CONFIG_FOO) evaluates to 1 if CONFIG_FOO is set to 'y' or 'm',
     63 * 0 otherwise.
     64 */
     65#define IS_ENABLED(option) __or(IS_BUILTIN(option), IS_MODULE(option))
     66
     67#endif /* _TOOLS_LINUX_KCONFIG_H */