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mirror_zfs/config/toolchain-simd.m4
Attila Fülöp 8e94ac0e36
Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 
Linux 5.16 moved XSTATE_XSAVE and XSTATE_XRESTORE out of our reach,
so add our own XSAVE{,OPT,S} code and use it for Linux 5.16.

Please note that this differs from previous behavior in that it
won't handle exceptions created by XSAVE an XRSTOR. This is sensible
for three reasons.

 - Exceptions during XSAVE and XRSTOR can only occur if the feature
   is not supported or enabled or the memory operand isn't aligned
   on a 64 byte boundary. If this happens something else went
   terribly wrong, and it may be better to stop execution.

 - Previously we just printed a warning and didn't handle the fault,
   this is arguable for the above reason.

 - All other *SAVE instruction also don't handle exceptions, so this
   at least aligns behavior.

Finally add a test to catch such a regression in the future.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #13042
Closes #13059
2022-02-09 12:50:10 -08:00

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dnl #
dnl # Checks if host toolchain supports SIMD instructions
dnl #
AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD], [
case "$host_cpu" in
amd64 | x86_64 | x86 | i686)
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE2
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE3
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSSE3
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_1
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_2
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX2
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512F
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512CD
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512DQ
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512BW
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512IFMA
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VBMI
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512PF
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512ER
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VL
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_MOVBE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVEOPT
ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVES
;;
esac
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE], [
AC_MSG_CHECKING([whether host toolchain supports SSE])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
__asm__ __volatile__("xorps %xmm0, %xmm1");
}
]])], [
AC_DEFINE([HAVE_SSE], 1, [Define if host toolchain supports SSE])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE2
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE2], [
AC_MSG_CHECKING([whether host toolchain supports SSE2])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
__asm__ __volatile__("pxor %xmm0, %xmm1");
}
]])], [
AC_DEFINE([HAVE_SSE2], 1, [Define if host toolchain supports SSE2])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE3
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE3], [
AC_MSG_CHECKING([whether host toolchain supports SSE3])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
char v[16];
__asm__ __volatile__("lddqu %0,%%xmm0" :: "m"(v[0]));
}
]])], [
AC_DEFINE([HAVE_SSE3], 1, [Define if host toolchain supports SSE3])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSSE3
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSSE3], [
AC_MSG_CHECKING([whether host toolchain supports SSSE3])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
__asm__ __volatile__("pshufb %xmm0,%xmm1");
}
]])], [
AC_DEFINE([HAVE_SSSE3], 1, [Define if host toolchain supports SSSE3])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_1
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_1], [
AC_MSG_CHECKING([whether host toolchain supports SSE4.1])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
__asm__ __volatile__("pmaxsb %xmm0,%xmm1");
}
]])], [
AC_DEFINE([HAVE_SSE4_1], 1, [Define if host toolchain supports SSE4.1])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_2
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_SSE4_2], [
AC_MSG_CHECKING([whether host toolchain supports SSE4.2])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
__asm__ __volatile__("pcmpgtq %xmm0, %xmm1");
}
]])], [
AC_DEFINE([HAVE_SSE4_2], 1, [Define if host toolchain supports SSE4.2])
AC_MSG_RESULT([yes])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX], [
AC_MSG_CHECKING([whether host toolchain supports AVX])
AC_LINK_IFELSE([AC_LANG_SOURCE([[
void main()
{
char v[32];
__asm__ __volatile__("vmovdqa %0,%%ymm0" :: "m"(v[0]));
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX], 1, [Define if host toolchain supports AVX])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX2
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX2], [
AC_MSG_CHECKING([whether host toolchain supports AVX2])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpshufb %ymm0,%ymm1,%ymm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX2], 1, [Define if host toolchain supports AVX2])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512F
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512F], [
AC_MSG_CHECKING([whether host toolchain supports AVX512F])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpandd %zmm0,%zmm1,%zmm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512F], 1, [Define if host toolchain supports AVX512F])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512CD
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512CD], [
AC_MSG_CHECKING([whether host toolchain supports AVX512CD])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vplzcntd %zmm0,%zmm1");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512CD], 1, [Define if host toolchain supports AVX512CD])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512DQ
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512DQ], [
AC_MSG_CHECKING([whether host toolchain supports AVX512DQ])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vandpd %zmm0,%zmm1,%zmm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512DQ], 1, [Define if host toolchain supports AVX512DQ])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512BW
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512BW], [
AC_MSG_CHECKING([whether host toolchain supports AVX512BW])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpshufb %zmm0,%zmm1,%zmm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512BW], 1, [Define if host toolchain supports AVX512BW])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512IFMA
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512IFMA], [
AC_MSG_CHECKING([whether host toolchain supports AVX512IFMA])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpmadd52luq %zmm0,%zmm1,%zmm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512IFMA], 1, [Define if host toolchain supports AVX512IFMA])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VBMI
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VBMI], [
AC_MSG_CHECKING([whether host toolchain supports AVX512VBMI])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpermb %zmm0,%zmm1,%zmm2");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512VBMI], 1, [Define if host toolchain supports AVX512VBMI])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512PF
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512PF], [
AC_MSG_CHECKING([whether host toolchain supports AVX512PF])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vgatherpf0dps (%rsi,%zmm0,4){%k1}");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512PF], 1, [Define if host toolchain supports AVX512PF])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512ER
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512ER], [
AC_MSG_CHECKING([whether host toolchain supports AVX512ER])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vexp2pd %zmm0,%zmm1");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512ER], 1, [Define if host toolchain supports AVX512ER])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VL
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AVX512VL], [
AC_MSG_CHECKING([whether host toolchain supports AVX512VL])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("vpabsq %zmm0,%zmm1");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AVX512VL], 1, [Define if host toolchain supports AVX512VL])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_AES], [
AC_MSG_CHECKING([whether host toolchain supports AES])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("aesenc %xmm0, %xmm1");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_AES], 1, [Define if host toolchain supports AES])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_PCLMULQDQ], [
AC_MSG_CHECKING([whether host toolchain supports PCLMULQDQ])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("pclmulqdq %0, %%xmm0, %%xmm1" :: "i"(0));
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_PCLMULQDQ], 1, [Define if host toolchain supports PCLMULQDQ])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_MOVBE
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_MOVBE], [
AC_MSG_CHECKING([whether host toolchain supports MOVBE])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
__asm__ __volatile__("movbe 0(%eax), %eax");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_MOVBE], 1, [Define if host toolchain supports MOVBE])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVE], [
AC_MSG_CHECKING([whether host toolchain supports XSAVE])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
char b[4096] __attribute__ ((aligned (64)));
__asm__ __volatile__("xsave %[b]\n" : : [b] "m" (*b) : "memory");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_XSAVE], 1, [Define if host toolchain supports XSAVE])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVEOPT
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVEOPT], [
AC_MSG_CHECKING([whether host toolchain supports XSAVEOPT])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
char b[4096] __attribute__ ((aligned (64)));
__asm__ __volatile__("xsaveopt %[b]\n" : : [b] "m" (*b) : "memory");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_XSAVEOPT], 1, [Define if host toolchain supports XSAVEOPT])
], [
AC_MSG_RESULT([no])
])
])
dnl #
dnl # ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVES
dnl #
AC_DEFUN([ZFS_AC_CONFIG_TOOLCHAIN_CAN_BUILD_XSAVES], [
AC_MSG_CHECKING([whether host toolchain supports XSAVES])
AC_LINK_IFELSE([AC_LANG_SOURCE([
[
void main()
{
char b[4096] __attribute__ ((aligned (64)));
__asm__ __volatile__("xsaves %[b]\n" : : [b] "m" (*b) : "memory");
}
]])], [
AC_MSG_RESULT([yes])
AC_DEFINE([HAVE_XSAVES], 1, [Define if host toolchain supports XSAVES])
], [
AC_MSG_RESULT([no])
])
])
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