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Add simd_config.h and HAVE_SIMD() selector

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We need to select which SIMD variable to check based on the compilation
target: HAVE_KERNEL_xxx for the Linux kernel, HAVE_TOOLCHAIN_xxx for
other platforms.

This adds a HAVE_SIMD() macro returns the right result depending on the
definedness or value of the variable for this target.

The macro is in simd_config.h, which is forcibly included in every
compiler call (like zfs_config.h), to ensure that it can be used
directly without further includes.

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
2026-03-05 10:23:30 +11:00
committed by Brian Behlendorf
parent 35f74f84e6
commit c329530e6b
5 changed files with 111 additions and 2 deletions
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module/Kbuild.in
+2
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@@ -11,6 +11,7 @@ zfs_include = @abs_top_srcdir@/include
icp_include = @abs_srcdir@/icp/include
zstd_include = @abs_srcdir@/zstd/include
ZFS_MODULE_CFLAGS += -include @abs_top_builddir@/zfs_config.h
ZFS_MODULE_CFLAGS += -include $(zfs_include)/sys/simd_config.h
ZFS_MODULE_CFLAGS += -I@abs_top_builddir@/include
src = @abs_srcdir@
obj = @abs_builddir@
@@ -19,6 +20,7 @@ zfs_include = $(srctree)/include/zfs
icp_include = $(src)/icp/include
zstd_include = $(src)/zstd/include
ZFS_MODULE_CFLAGS += -include $(zfs_include)/zfs_config.h
ZFS_MODULE_CFLAGS += -include $(zfs_include)/sys/simd_config.h
endif
ZFS_MODULE_CFLAGS += -I$(zfs_include)/os/linux/kernel