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From: Catalin Marinas <catalin.marinas@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Szabolcs Nagy <szabolcs.nagy@arm.com>,
	Richard Earnshaw <Richard.Earnshaw@arm.com>,
	Kevin Brodsky <kevin.brodsky@arm.com>,
	Andrey Konovalov <andreyknvl@google.com>,
	linux-mm@kvack.org, linux-arch@vger.kernel.org,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	linux-kbuild@vger.kernel.org,
	Vladimir Murzin <vladimir.murzin@arm.com>
Subject: [PATCH 02/22] kbuild: Add support for 'as-instr' to be used in Kconfig files
Date: Wed, 11 Dec 2019 18:40:07 +0000	[thread overview]
Message-ID: <20191211184027.20130-3-catalin.marinas@arm.com> (raw)
In-Reply-To: <20191211184027.20130-1-catalin.marinas@arm.com>

Similar to 'cc-option' or 'ld-option', it is occasionally necessary to
check whether the assembler supports certain ISA extensions. In the
arm64 code we currently do this in Makefile with an additional define:

lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)

Add the 'as-instr' option so that it can be used in Kconfig directly:

	def_bool $(as-instr,.arch_extension lse)

Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-kbuild@vger.kernel.org
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 scripts/Kconfig.include | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/Kconfig.include b/scripts/Kconfig.include
index d4adfbe42690..9d07e59cbdf7 100644
--- a/scripts/Kconfig.include
+++ b/scripts/Kconfig.include
@@ -31,6 +31,10 @@ cc-option = $(success,$(CC) -Werror $(CLANG_FLAGS) $(1) -E -x c /dev/null -o /de
 # Return y if the linker supports <flag>, n otherwise
 ld-option = $(success,$(LD) -v $(1))
 
+# $(as-instr,<instr>)
+# Return y if the assembler supports <instr>, n otherwise
+as-instr = $(success,printf "%b\n" "$(1)" | $(CC) $(CLANG_FLAGS) -c -x assembler -o /dev/null -)
+
 # check if $(CC) and $(LD) exist
 $(error-if,$(failure,command -v $(CC)),compiler '$(CC)' not found)
 $(error-if,$(failure,command -v $(LD)),linker '$(LD)' not found)


  parent reply	other threads:[~2019-12-11 18:49 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-11 18:40 [PATCH 00/22] arm64: Memory Tagging Extension user-space support Catalin Marinas
2019-12-11 18:40 ` [PATCH 01/22] mm: Reserve asm-generic prot flags 0x10 and 0x20 for arch use Catalin Marinas
2019-12-11 19:26   ` Arnd Bergmann
2019-12-11 18:40 ` Catalin Marinas [this message]
2019-12-12  5:03   ` [PATCH 02/22] kbuild: Add support for 'as-instr' to be used in Kconfig files Masahiro Yamada
2019-12-11 18:40 ` [PATCH 03/22] arm64: alternative: Allow alternative_insn to always issue the first instruction Catalin Marinas
2019-12-11 18:40 ` [PATCH 04/22] arm64: Use macros instead of hard-coded constants for MAIR_EL1 Catalin Marinas
2019-12-11 18:40 ` [PATCH 05/22] arm64: mte: system register definitions Catalin Marinas
2019-12-11 18:40 ` [PATCH 06/22] arm64: mte: CPU feature detection and initial sysreg configuration Catalin Marinas
2019-12-11 18:40 ` [PATCH 07/22] arm64: mte: Use Normal Tagged attributes for the linear map Catalin Marinas
2019-12-11 18:40 ` [PATCH 08/22] arm64: mte: Assembler macros and default architecture for .S files Catalin Marinas
2019-12-11 18:40 ` [PATCH 09/22] arm64: mte: Tags-aware clear_page() implementation Catalin Marinas
2019-12-11 18:40 ` [PATCH 10/22] arm64: mte: Tags-aware copy_page() implementation Catalin Marinas
2019-12-11 18:40 ` [PATCH 11/22] arm64: Tags-aware memcmp_pages() implementation Catalin Marinas
2019-12-11 18:40 ` [PATCH 12/22] arm64: mte: Add specific SIGSEGV codes Catalin Marinas
2019-12-11 19:31   ` Arnd Bergmann
2019-12-12  9:34     ` Catalin Marinas
2019-12-12 18:26     ` Eric W. Biederman
2019-12-17 17:48       ` Catalin Marinas
2019-12-17 20:06         ` Eric W. Biederman
2019-12-11 18:40 ` [PATCH 13/22] arm64: mte: Handle synchronous and asynchronous tag check faults Catalin Marinas
2019-12-14  1:43   ` Peter Collingbourne
2019-12-17 18:01     ` Catalin Marinas
2019-12-20  1:36       ` [PATCH] arm64: mte: Do not service syscalls after async tag fault Peter Collingbourne
2020-02-12 11:09         ` Catalin Marinas
2020-02-18 21:59           ` Peter Collingbourne
2020-02-19 16:16             ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 14/22] mm: Introduce arch_calc_vm_flag_bits() Catalin Marinas
2019-12-11 18:40 ` [PATCH 15/22] arm64: mte: Add PROT_MTE support to mmap() and mprotect() Catalin Marinas
2020-01-21 22:06   ` Peter Collingbourne
2019-12-11 18:40 ` [PATCH 16/22] mm: Introduce arch_validate_flags() Catalin Marinas
2019-12-11 18:40 ` [PATCH 17/22] arm64: mte: Validate the PROT_MTE request via arch_validate_flags() Catalin Marinas
2019-12-11 18:40 ` [PATCH 18/22] mm: Allow arm64 mmap(PROT_MTE) on RAM-based files Catalin Marinas
2019-12-11 18:40 ` [PATCH 19/22] arm64: mte: Allow user control of the tag check mode via prctl() Catalin Marinas
2019-12-19 20:32   ` Peter Collingbourne
2019-12-20  1:48     ` [PATCH] arm64: mte: Clear SCTLR_EL1.TCF0 on exec Peter Collingbourne
2020-02-12 17:03       ` Catalin Marinas
2019-12-27 14:34   ` [PATCH 19/22] arm64: mte: Allow user control of the tag check mode via prctl() Kevin Brodsky
2020-02-12 11:45     ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 20/22] arm64: mte: Allow user control of the excluded tags " Catalin Marinas
2019-12-16 14:20   ` Kevin Brodsky
2019-12-16 17:30     ` Peter Collingbourne
2019-12-17 17:56       ` Catalin Marinas
2020-06-22 17:17       ` Catalin Marinas
2020-06-22 19:00         ` Peter Collingbourne
2020-06-23 16:42           ` Catalin Marinas
2019-12-11 18:40 ` [PATCH 21/22] arm64: mte: Kconfig entry Catalin Marinas
2019-12-11 18:40 ` [PATCH 22/22] arm64: mte: Add Memory Tagging Extension documentation Catalin Marinas
2019-12-24 15:03   ` Kevin Brodsky
2019-12-13 18:05 ` [PATCH 00/22] arm64: Memory Tagging Extension user-space support Peter Collingbourne
2020-02-13 11:23   ` Catalin Marinas

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