Linux kernel: remove AVX compiler flags

As these flags are not needed for the Intrinsics code, it is safer to remove them to aovid the compiler adding AVX instructions somewhere else where we do not expect it and thus do not have kernel_fpu_enable around that code. Signed-off-by: Stephan Mueller <[email protected]>
smuellerDD · Feb 8, 2024 · e657d57 · e657d57
1 parent e388cea
commit e657d57
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diff --git a/CHANGES.md b/CHANGES.md
@@ -23,7 +23,7 @@ Changes 0.9.0-prerelease
 
 * enhancement: use accelerated XOR for KMAC/cSHAKE AEAD
 
-* fix: enable poly_compress_avx for Linux kernel compilation
+* fix: enable poly_compress_avx for Linux kernel compilation when GCC >= 13 is present
 
 Changes 0.8.0:
 

diff --git a/TODO b/TODO
@@ -7,6 +7,4 @@
   compiled for target host ARMv7 - at the moment compiling on ARMv6 fails
   because the Neon code is compiled (which should not be compiled)
 
-- poly_compress_avx does not work when compiled for Linux kernel - it works with current compilers (see change 0b0bf07b5f7c0d7d623087212883c427476eefef, but older compilers still fail this code
-
 - check RISCV-64 Keccak implementation
diff --git a/linux_kernel/Kbuild b/linux_kernel/Kbuild
@@ -238,12 +238,9 @@ ccflags-y			:= -I$(PWD) -DLINUX_KERNEL -DLC_MEM_ON_HEAP    \
 				   -DMAJVERSION=0 -DMINVERSION=9 -DPATCHLEVEL=0
 
 ifdef CONFIG_X86_64
-ccflags-y			+= -DLC_HOST_X86_64			       \
-				    -mavx2 -mbmi2 -mpopcnt		       \
-				    -Wno-unused-command-line-argument
+ccflags-y			+= -DLC_HOST_X86_64
 else ifdef CONFIG_ARM64
-ccflags-y			+= -DLC_HOST_AARCH64			       \
-				   -march=armv8-a+simd -Wno-unused-result
+ccflags-y			+= -DLC_HOST_AARCH64
 else ifneq ($(and $(CONFIG_RISCV),$(CONFIG_64BIT)),)
 ccflags-y			+= -DLC_HOST_RISCV64
 endif