Changes in Kconfig.assembler

46916980 - x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSS

Wed, 12 Jun 2024 05:02:55 +0000

x86/kconfig: Add as-instr64 macro to properly evaluate AS_WRUSSSome instructions are only available on the 64-bit architecture.Bi-arch compilers that default to -m32 need the explicit -m64 optionto evaluate them properly.Fixes: 18e66b695e78 ("x86/shstk: Add Kconfig option for shadow stack")Closes: https://lore.kernel.org/all/20240612-as-instr-opt-wrussq-v2-1-bd950f7eead7@gmail.com/Reported-by: Dmitry Safonov <0x7f454c46@gmail.com>Signed-off-by: Masahiro Yamada Signed-off-by: Borislav Petkov (AMD) Tested-by: Dmitry Safonov <0x7f454c46@gmail.com>Link: https://lore.kernel.org/r/20240612050257.3670768-1-masahiroy@kernel.org List of files: /linux-6.15/arch/x86/Kconfig.assembler

7d4700d1 - x86: add kconfig symbols for assembler VAES and VPCLMULQDQ support

Fri, 29 Mar 2024 08:03:49 +0000

x86: add kconfig symbols for assembler VAES and VPCLMULQDQ supportAdd config symbols AS_VAES and AS_VPCLMULQDQ that expose whether theassembler supports the vector AES and carryless multiplicationcryptographic extensions.Reviewed-by: Ingo Molnar Signed-off-by: Eric Biggers Signed-off-by: Herbert Xu List of files: /linux-6.15/arch/x86/Kconfig.assembler

18e66b69 - x86/shstk: Add Kconfig option for shadow stack

Tue, 13 Jun 2023 00:10:32 +0000

x86/shstk: Add Kconfig option for shadow stackShadow stack provides protection for applications against function returnaddress corruption. It is active when the processor supports it, thekernel has CONFIG_X86_SHADOW_STACK enabled, and the application is builtfor the feature. This is only implemented for the 64-bit kernel. When itis enabled, legacy non-shadow stack applications continue to work, butwithout protection.Since there is another feature that utilizes CET (Kernel IBT) that willshare implementation with shadow stacks, create CONFIG_CET to signifythat at least one CET feature is configured.Co-developed-by: Yu-cheng Yu Signed-off-by: Yu-cheng Yu Signed-off-by: Rick Edgecombe Signed-off-by: Dave Hansen Reviewed-by: Borislav Petkov (AMD) Reviewed-by: Kees Cook Acked-by: Mike Rapoport (IBM) Tested-by: Pengfei Xu Tested-by: John Allen Tested-by: Kees Cook Link: https://lore.kernel.org/all/20230613001108.3040476-7-rick.p.edgecombe%40intel.com List of files: /linux-6.15/arch/x86/Kconfig.assembler

e3cf2f87 - crypto: x86/aria-avx - fix build failure with old binutils

Sun, 15 Jan 2023 12:15:34 +0000

crypto: x86/aria-avx - fix build failure with old binutilsThe minimum version of binutils for kernel build is currently 2.23 andit doesn't support GFNI.So, it fails to build the aria-avx if the old binutils is used.The code using GFNI is an optional part of aria-avx.So, it disables GFNI part in it when the old binutils is used.In order to check whether the using binutils is supporting GFNI or not,AS_GFNI is added.Fixes: ba3579e6e45c ("crypto: aria-avx - add AES-NI/AVX/x86_64/GFNI assembler implementation of aria cipher")Reported-by: Jan Beulich Signed-off-by: Taehee Yoo Signed-off-by: Herbert Xu List of files: /linux-6.15/arch/x86/Kconfig.assembler

cec5f268 - x86/delay: Introduce TPAUSE delay

Fri, 24 Apr 2020 19:37:56 +0000

x86/delay: Introduce TPAUSE delayTPAUSE instructs the processor to enter an implementation-dependentoptimized state. The instruction execution wakes up when the time-stampcounter reaches or exceeds the implicit EDX:EAX 64-bit input value.The instruction execution also wakes up due to the expiration ofthe operating system time-limit or by an external interruptor exceptions such as a debug exception or a machine check exception.TPAUSE offers a choice of two lower power states: 1. Light-weight power/performance optimized state C0.1 2. Improved power/performance optimized state C0.2This way, it can save power with low wake-up latency in comparison tospinloop based delay. The selection between the two is governed by theinput register.TPAUSE is available on processors with X86_FEATURE_WAITPKG.Co-developed-by: Fenghua Yu Signed-off-by: Fenghua Yu Signed-off-by: Kyung Min Park Signed-off-by: Thomas Gleixner Reviewed-by: Tony Luck Link: https://lkml.kernel.org/r/1587757076-30337-4-git-send-email-kyung.min.park@intel.com List of files: /linux-6.15/arch/x86/Kconfig.assembler

e6abef61 - x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2

Thu, 26 Mar 2020 20:26:00 +0000

x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2Now that the kernel specifies binutils 2.23 as the minimum version, wecan remove ifdefs for AVX2 and ADX throughout.Signed-off-by: Jason A. Donenfeld Acked-by: Ingo Molnar Reviewed-by: Nick Desaulniers Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/x86/Kconfig.assembler

e9e070cf - x86: add comments about the binutils version to support code in as-instr

Thu, 26 Mar 2020 08:00:59 +0000

x86: add comments about the binutils version to support code in as-instrWe raise the minimal supported binutils version from time to time.The last bump was commit 1fb12b35e5ff ("kbuild: Raise the minimumrequired binutils version to 2.21").We have these as-instr tests because binutils 2.21 does not supportthem.When we bump the binutils version next time, this will be a goodhint to find out which one can be dropped.As for the Clang/LLVM builds, we require very new LLVM version,so the LLVM integrated assembler supports all of them.Signed-off-by: Masahiro Yamada Acked-by: Jason A. Donenfeld Acked-by: Ingo Molnar Acked-by: Nick Desaulniers List of files: /linux-6.15/arch/x86/Kconfig.assembler

5e8ebd84 - x86: probe assembler capabilities via kconfig instead of makefile

Thu, 26 Mar 2020 08:00:58 +0000

x86: probe assembler capabilities via kconfig instead of makefileDoing this probing inside of the Makefiles means we have a maze ofifdefs inside the source code and child Makefiles that need to makeproper decisions on this too. Instead, we do it at Kconfig time, likemany other compiler and assembler options, which allows us to set up thedependencies normally for full compilation units. In the process, theADX test changes to use %eax instead of %r10 so that it's valid in both32-bit and 64-bit mode.Signed-off-by: Jason A. Donenfeld Acked-by: Ingo Molnar Reviewed-by: Nick Desaulniers Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/x86/Kconfig.assembler