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config: also do SIMD checks on the kernel toolchain

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The kernel may be built with a different compiler, and also includes
objtool, which may fail on unknwon instructions sequences. So, we want
to run the checks a second time for that toolchain too.

Sponsored-by: TrueNAS
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18285
This commit is contained in:
Rob Norris 2026-03-04 20:21:07 +11:00 committed by Brian Behlendorf
parent c183268019
commit 92a6ab405f
2 changed files with 57 additions and 23 deletions
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2
config/kernel.m4
View File

@ -37,6 +37,7 @@ dnl # only once the compilation can be done in parallel significantly
dnl # speeding up the process.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_SIMD
ZFS_AC_KERNEL_SRC_TYPES
ZFS_AC_KERNEL_SRC_OBJTOOL
ZFS_AC_KERNEL_SRC_ACCESS_OK_TYPE
@ -161,6 +162,7 @@ dnl #
dnl # Check results of kernel interface tests.
dnl #
AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_SIMD
ZFS_AC_KERNEL_TYPES
ZFS_AC_KERNEL_ACCESS_OK_TYPE
ZFS_AC_KERNEL_OBJTOOL

78
config/toolchain-simd.m4
View File

@ -5,11 +5,15 @@ dnl #
dnl #
dnl # Each invocation of ZFS_AC_TOOLCHAIN_SIMD_CHECK(name, asmsrc) creates
dnl # a macro ZFS_AC_TOOLCHAIN_SIMD_<name> that tries to compile
dnl # the given <asmsrc> in a __asm__ directive to the C compiler. If the
dnl # check passes, HAVE_TOOLCHAIN_<name> is defined.
dnl # two sets of macros:
dnl # - ZFS_AC_TOOLCHAIN_SIMD_<name>
dnl # - ZFS_AC_KERNEL_SRC_SIMD_<name> & ZFS_AC_KERNEL_SIMD_<name>
dnl #
AC_DEFUN([ZFS_AC_TOOLCHAIN_SIMD_CHECK], [
dnl # These try to compile the given <asmsrc> in a __asm__ directive, using
dnl # either the host or the kernel toolchains. Successful checks set
dnl # HAVE_TOOLCHAIN_<name> or HAVE_KERNEL_<name>, respectively.
dnl #
AC_DEFUN([ZFS_AC_SIMD_CHECK], [
AC_DEFUN([ZFS_AC_TOOLCHAIN_SIMD_]m4_quote($1), [
AC_MSG_CHECKING([whether host toolchain supports $1])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
@ -26,31 +30,59 @@ AC_DEFUN([ZFS_AC_TOOLCHAIN_SIMD_CHECK], [
])
])
dnl Stash name of new function so we can execute them later
AC_DEFUN([ZFS_AC_KERNEL_SRC_SIMD_]m4_quote($1), [
ZFS_LINUX_TEST_SRC(
[simd_]m4_quote(m4_translit([$1], [A-Z], [a-z])), [], [
__asm__ __volatile__($2);
])
])
AC_DEFUN([ZFS_AC_KERNEL_SIMD_]m4_quote($1), [
AC_MSG_CHECKING([whether kernel toolchain supports $1])
ZFS_LINUX_TEST_RESULT(
[simd_]m4_quote(m4_translit([$1], [A-Z], [a-z])), [
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_KERNEL_$1], 1,
[Define if kernel toolchain supports $1])
], [
AC_MSG_RESULT([no])
])
])
dnl Stash the names of the new functions so we can execute them later.
m4_pushdef([_zfs_ac_toolchain_simd_checks],
[ZFS_AC_TOOLCHAIN_SIMD_]m4_quote($1))
m4_pushdef([_zfs_ac_kernel_src_simd_checks],
[ZFS_AC_KERNEL_SRC_SIMD_]m4_quote($1))
m4_pushdef([_zfs_ac_kernel_simd_checks],
[ZFS_AC_KERNEL_SIMD_]m4_quote($1))
])
dnl # Invokes all macros created by ZFS_AC_TOOLCHAIN_SIMD_CHECK.
dnl # Invoke the macros created by ZFS_AC_TOOLCHAIN_SIMD_CHECK.
AC_DEFUN([ZFS_AC_TOOLCHAIN_SIMD], [
m4_stack_foreach([_zfs_ac_toolchain_simd_checks], [m4_indir])
])
AC_DEFUN([ZFS_AC_KERNEL_SRC_SIMD], [
m4_stack_foreach([_zfs_ac_kernel_src_simd_checks], [m4_indir])
])
AC_DEFUN([ZFS_AC_KERNEL_SIMD], [
m4_stack_foreach([_zfs_ac_kernel_simd_checks], [m4_indir])
])
dnl # Instruction sets to test
ZFS_AC_TOOLCHAIN_SIMD_CHECK([SSE2], ["pxor %xmm0, %xmm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([SSSE3], ["pshufb %xmm0, %xmm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([SSE4_1], ["pmaxsb %xmm0, %xmm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AVX], ["vmovdqa %ymm0, %ymm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AVX2], ["vpshufb %ymm0, %ymm1, %ymm2"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AVX512F], ["vpandd %zmm0, %zmm1, %zmm2"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AVX512BW], ["vpshufb %zmm0, %zmm1, %zmm2"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AVX512VL], ["vpabsq %zmm0,%zmm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([AES], ["aesenc %xmm0, %xmm1"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([PCLMULQDQ], ["pclmulqdq %0, %%xmm0, %%xmm1" :: "i"(0)])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([MOVBE], ["movbe 0(%eax), %eax"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([VAES], ["vaesenc %ymm0, %ymm1, %ymm0"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([VPCLMULQDQ], ["vpclmulqdq %0, %%ymm4, %%ymm3, %%ymm5" :: "i"(0)])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([SHA512EXT], ["vsha512msg2 %ymm5, %ymm6"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([XSAVE], ["xsave 0"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([XSAVEOPT], ["xsaveopt 0"])
ZFS_AC_TOOLCHAIN_SIMD_CHECK([XSAVES], ["xsaves 0"])
ZFS_AC_SIMD_CHECK([SSE2], ["pxor %xmm0, %xmm1"])
ZFS_AC_SIMD_CHECK([SSSE3], ["pshufb %xmm0, %xmm1"])
ZFS_AC_SIMD_CHECK([SSE4_1], ["pmaxsb %xmm0, %xmm1"])
ZFS_AC_SIMD_CHECK([AVX], ["vmovdqa %ymm0, %ymm1"])
ZFS_AC_SIMD_CHECK([AVX2], ["vpshufb %ymm0, %ymm1, %ymm2"])
ZFS_AC_SIMD_CHECK([AVX512F], ["vpandd %zmm0, %zmm1, %zmm2"])
ZFS_AC_SIMD_CHECK([AVX512BW], ["vpshufb %zmm0, %zmm1, %zmm2"])
ZFS_AC_SIMD_CHECK([AVX512VL], ["vpabsq %zmm0,%zmm1"])
ZFS_AC_SIMD_CHECK([AES], ["aesenc %xmm0, %xmm1"])
ZFS_AC_SIMD_CHECK([PCLMULQDQ], ["pclmulqdq %0, %%xmm0, %%xmm1" :: "i"(0)])
ZFS_AC_SIMD_CHECK([MOVBE], ["movbe 0(%eax), %eax"])
ZFS_AC_SIMD_CHECK([VAES], ["vaesenc %ymm0, %ymm1, %ymm0"])
ZFS_AC_SIMD_CHECK([VPCLMULQDQ], ["vpclmulqdq %0, %%ymm4, %%ymm3, %%ymm5" :: "i"(0)])
ZFS_AC_SIMD_CHECK([SHA512EXT], ["vsha512msg2 %ymm5, %ymm6"])
ZFS_AC_SIMD_CHECK([XSAVE], ["xsave 0"])
ZFS_AC_SIMD_CHECK([XSAVEOPT], ["xsaveopt 0"])
ZFS_AC_SIMD_CHECK([XSAVES], ["xsaves 0"])