linux-kernel - [PATCH 02/12] kconfig: introduce CONFIG_ARCH_HAS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250217-kunit-kselftests-v1-2-42b4524c3b0a@linutronix.de>
Date: Mon, 17 Feb 2025 11:59:22 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: Masahiro Yamada <masahiroy@...nel.org>, 
 Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, 
 Andrew Morton <akpm@...ux-foundation.org>, Willy Tarreau <w@....eu>, 
 Thomas Weißschuh <linux@...ssschuh.net>, 
 Brendan Higgins <brendan.higgins@...ux.dev>, 
 David Gow <davidgow@...gle.com>, Rae Moar <rmoar@...gle.com>, 
 Shuah Khan <shuah@...nel.org>, Jonathan Corbet <corbet@....net>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com, 
 linux-doc@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [PATCH 02/12] kconfig: introduce CONFIG_ARCH_HAS_NOLIBC

Nolibc does not support all architectures.
Add a kconfig option, so users can know where it is available.

The new option is maintained inside tools/include/nolibc/ as only that
directory is responsible for nolibc's availability.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 init/Kconfig                        |  2 ++
 tools/include/nolibc/Kconfig.nolibc | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/init/Kconfig b/init/Kconfig
index d0d021b3fa3b3da5576421b4e1c63baf6c8afc09..794c9516d461ef7a3c5d399d982d3031199f0442 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -92,6 +92,8 @@ config CC_CAN_LINK_STATIC
 	default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m64-flag) -static) if 64BIT
 	default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(CLANG_FLAGS) $(USERCFLAGS) $(USERLDFLAGS) $(m32-flag) -static)
 
+source "tools/include/nolibc/Kconfig.nolibc"
+
 # Fixed in GCC 14, 13.3, 12.4 and 11.5
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113921
 config GCC_ASM_GOTO_OUTPUT_BROKEN
diff --git a/tools/include/nolibc/Kconfig.nolibc b/tools/include/nolibc/Kconfig.nolibc
new file mode 100644
index 0000000000000000000000000000000000000000..a29825869d9b49a5502ae32d265b6f9c076f5713
--- /dev/null
+++ b/tools/include/nolibc/Kconfig.nolibc
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config ARCH_HAS_NOLIBC
+	def_bool n
+	help
+	  Enabled if nolibc supports the current kernel architecture
+
+config ENABLE_ARCH_HAS_NOLIBC
+	def_bool y
+	select ARCH_HAS_NOLIBC if X86
+	select ARCH_HAS_NOLIBC if ARM
+	select ARCH_HAS_NOLIBC if ARM64
+	select ARCH_HAS_NOLIBC if PPC
+	select ARCH_HAS_NOLIBC if MIPS
+	select ARCH_HAS_NOLIBC if LOONGARCH
+	select ARCH_HAS_NOLIBC if RISCV
+	select ARCH_HAS_NOLIBC if S390
+	select ARCH_HAS_NOLIBC if UML && UML_X86

-- 
2.48.1