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simd: detect and surface support for Intel SHA512 extensions

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Recent Intel CPUs (starting with Arrow Lake and Lunar Lake) include new
vectorised SHA512 instructions. Detect them and make them available to
the rest of the system.

Note the internal name "sha512ext". This is to disambiguate from other
uses of "sha512".

Sponsored-by: TrueNAS
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Attila Fülöp <attila@fueloep.org>
Signed-off-by: Rob Norris <rob.norris@truenas.com>
Closes #18233
This commit is contained in:
Rob Norris
2026-02-17 13:55:20 +11:00
committed by Brian Behlendorf
parent 6495dafd58
commit 3547a358fd
4 changed files with 53 additions and 1 deletions
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config/toolchain-simd.m4
+22
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@@ -27,6 +27,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD], [
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_MOVBE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VAES
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VPCLMULQDQ
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVEOPT
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVES
@@ -491,6 +492,27 @@ AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_VPCLMULQDQ], [
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SHA512EXT], [
AC_MSG_CHECKING([whether host toolchain supports SHA512])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
int main()
{
__asm__ __volatile__("vsha512msg2 %ymm5, %ymm6");
return (0);
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_SHA512EXT], 1, [Define if host toolchain supports SHA512])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
dnl #