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Linux 5.0 compat: Disable vector instructions on 5.0+ kernels
The 5.0 kernel no longer exports the functions we need to do vector (SSE/SSE2/SSE3/AVX...) instructions. Disable vector-based checksum algorithms when building against those kernels. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tony Hutter <hutter2@llnl.gov> Closes #8259
This commit is contained in:
Tony Hutter
parent
f45ad7bff6
commit
e22bfd8149
@ -1,18 +1,41 @@
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dnl #
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dnl # 4.2 API change
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dnl # asm/i387.h is replaced by asm/fpu/api.h
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dnl # Handle differences in kernel FPU code.
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dnl #
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dnl # Kernel
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dnl # 5.0: All kernel fpu functions are GPL only, so we can't use them.
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dnl # (nothing defined)
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dnl #
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dnl # 4.2: Use __kernel_fpu_{begin,end}()
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dnl # HAVE_UNDERSCORE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU
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dnl #
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dnl # Pre-4.2: Use kernel_fpu_{begin,end}()
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dnl # HAVE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_FPU], [
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AC_MSG_CHECKING([whether asm/fpu/api.h exists])
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AC_MSG_CHECKING([which kernel_fpu function to use])
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ZFS_LINUX_TRY_COMPILE([
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#include <asm/i387.h>
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#include <asm/xcr.h>
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],[
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kernel_fpu_begin();
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kernel_fpu_end();
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],[
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AC_MSG_RESULT(kernel_fpu_*)
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AC_DEFINE(HAVE_KERNEL_FPU, 1, [kernel has kernel_fpu_* functions])
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AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions])
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],[
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/kernel.h>
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#include <asm/fpu/api.h>
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],[
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__kernel_fpu_begin();
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__kernel_fpu_end();
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_FPU_API_H, 1, [kernel has <asm/fpu/api.h> interface])
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AC_MSG_RESULT(__kernel_fpu_*)
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AC_DEFINE(HAVE_UNDERSCORE_KERNEL_FPU, 1, [kernel has __kernel_fpu_* functions])
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AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions])
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],[
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AC_MSG_RESULT(no)
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AC_MSG_RESULT(not exported)
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])
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])
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])
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@ -81,7 +81,7 @@
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#endif
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#if defined(_KERNEL)
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#if defined(HAVE_FPU_API_H)
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#if defined(HAVE_UNDERSCORE_KERNEL_FPU)
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#include <asm/fpu/api.h>
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#include <asm/fpu/internal.h>
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#define kfpu_begin() \
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@ -94,12 +94,18 @@
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__kernel_fpu_end(); \
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preempt_enable(); \
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}
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#else
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#elif defined(HAVE_KERNEL_FPU)
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#include <asm/i387.h>
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#include <asm/xcr.h>
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#define kfpu_begin() kernel_fpu_begin()
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#define kfpu_end() kernel_fpu_end()
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#endif /* defined(HAVE_FPU_API_H) */
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#else
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/* Kernel doesn't export any kernel_fpu_* functions */
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#include <asm/fpu/internal.h> /* For kernel xgetbv() */
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#define kfpu_begin() panic("This code should never run")
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#define kfpu_end() panic("This code should never run")
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#endif /* defined(HAVE_KERNEL_FPU) */
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#else
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/*
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* fpu dummy methods for userspace
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@ -278,11 +284,13 @@ __simd_state_enabled(const uint64_t state)
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boolean_t has_osxsave;
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uint64_t xcr0;
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#if defined(_KERNEL) && defined(X86_FEATURE_OSXSAVE)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_OSXSAVE) && defined(KERNEL_EXPORTS_X86_FPU)
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has_osxsave = !!boot_cpu_has(X86_FEATURE_OSXSAVE);
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#elif defined(_KERNEL) && !defined(X86_FEATURE_OSXSAVE)
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has_osxsave = B_FALSE;
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#else
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has_osxsave = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_osxsave = __cpuid_has_osxsave();
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#endif
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@ -307,8 +315,12 @@ static inline boolean_t
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zfs_sse_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_XMM));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_sse());
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#endif
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}
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@ -320,8 +332,12 @@ static inline boolean_t
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zfs_sse2_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_XMM2));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_sse2());
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#endif
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}
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@ -333,8 +349,12 @@ static inline boolean_t
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zfs_sse3_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_XMM3));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_sse3());
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#endif
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}
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@ -346,8 +366,12 @@ static inline boolean_t
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zfs_ssse3_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_SSSE3));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_ssse3());
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#endif
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}
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@ -359,8 +383,12 @@ static inline boolean_t
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zfs_sse4_1_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_XMM4_1));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_sse4_1());
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#endif
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}
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@ -372,8 +400,12 @@ static inline boolean_t
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zfs_sse4_2_available(void)
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{
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_XMM4_2));
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_sse4_2());
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#endif
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}
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@ -386,8 +418,12 @@ zfs_avx_available(void)
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{
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boolean_t has_avx;
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#if defined(_KERNEL)
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#if defined(KERNEL_EXPORTS_X86_FPU)
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has_avx = !!boot_cpu_has(X86_FEATURE_AVX);
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#else
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has_avx = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx = __cpuid_has_avx();
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#endif
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@ -401,11 +437,13 @@ static inline boolean_t
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zfs_avx2_available(void)
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{
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boolean_t has_avx2;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX2)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX2) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx2 = !!boot_cpu_has(X86_FEATURE_AVX2);
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#elif defined(_KERNEL) && !defined(X86_FEATURE_AVX2)
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has_avx2 = B_FALSE;
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#else
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has_avx2 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx2 = __cpuid_has_avx2();
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#endif
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@ -418,11 +456,13 @@ zfs_avx2_available(void)
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static inline boolean_t
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zfs_bmi1_available(void)
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{
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#if defined(_KERNEL) && defined(X86_FEATURE_BMI1)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_BMI1) && defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_BMI1));
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#elif defined(_KERNEL) && !defined(X86_FEATURE_BMI1)
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return (B_FALSE);
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_bmi1());
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#endif
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}
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@ -433,16 +473,17 @@ zfs_bmi1_available(void)
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static inline boolean_t
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zfs_bmi2_available(void)
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{
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#if defined(_KERNEL) && defined(X86_FEATURE_BMI2)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_BMI2) && defined(KERNEL_EXPORTS_X86_FPU)
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return (!!boot_cpu_has(X86_FEATURE_BMI2));
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#elif defined(_KERNEL) && !defined(X86_FEATURE_BMI2)
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return (B_FALSE);
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#else
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return (B_FALSE);
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#endif
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#elif !defined(_KERNEL)
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return (__cpuid_has_bmi2());
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#endif
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}
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/*
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* AVX-512 family of instruction sets:
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*
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@ -466,8 +507,12 @@ zfs_avx512f_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512F)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512F) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = !!boot_cpu_has(X86_FEATURE_AVX512F);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512f();
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#endif
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@ -481,9 +526,13 @@ zfs_avx512cd_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512CD)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512CD) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512CD);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512cd();
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#endif
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@ -497,9 +546,13 @@ zfs_avx512er_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512ER)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512ER) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512ER);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512er();
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#endif
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@ -513,9 +566,13 @@ zfs_avx512pf_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512PF)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512PF) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512PF);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512pf();
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#endif
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@ -529,9 +586,13 @@ zfs_avx512bw_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512BW)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512BW) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512BW);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512bw();
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#endif
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@ -545,9 +606,13 @@ zfs_avx512dq_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512DQ)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512DQ) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512DQ);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512dq();
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#endif
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@ -561,9 +626,13 @@ zfs_avx512vl_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512VL)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512VL) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512VL);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512vl();
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#endif
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@ -577,9 +646,13 @@ zfs_avx512ifma_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512IFMA)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512IFMA) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512IFMA);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512ifma();
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#endif
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@ -593,9 +666,13 @@ zfs_avx512vbmi_available(void)
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{
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boolean_t has_avx512 = B_FALSE;
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#if defined(_KERNEL) && defined(X86_FEATURE_AVX512VBMI)
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#if defined(_KERNEL)
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#if defined(X86_FEATURE_AVX512VBMI) && defined(KERNEL_EXPORTS_X86_FPU)
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has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
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boot_cpu_has(X86_FEATURE_AVX512VBMI);
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#else
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has_avx512 = B_FALSE;
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#endif
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#elif !defined(_KERNEL)
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has_avx512 = __cpuid_has_avx512f() &&
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__cpuid_has_avx512vbmi();
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