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-rw-r--r--config/kernel-fpu.m441
-rw-r--r--include/linux/simd_x86.h142
2 files changed, 144 insertions, 39 deletions
diff --git a/config/kernel-fpu.m4 b/config/kernel-fpu.m4
index 1c5690969..671fe7ea5 100644
--- a/config/kernel-fpu.m4
+++ b/config/kernel-fpu.m4
@@ -1,18 +1,41 @@
+dnl #
+dnl # Handle differences in kernel FPU code.
dnl #
-dnl # 4.2 API change
-dnl # asm/i387.h is replaced by asm/fpu/api.h
+dnl # Kernel
+dnl # 5.0: All kernel fpu functions are GPL only, so we can't use them.
+dnl # (nothing defined)
+dnl #
+dnl # 4.2: Use __kernel_fpu_{begin,end}()
+dnl # HAVE_UNDERSCORE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU
+dnl #
+dnl # Pre-4.2: Use kernel_fpu_{begin,end}()
+dnl # HAVE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU
dnl #
AC_DEFUN([ZFS_AC_KERNEL_FPU], [
- AC_MSG_CHECKING([whether asm/fpu/api.h exists])
+ AC_MSG_CHECKING([which kernel_fpu function to use])
ZFS_LINUX_TRY_COMPILE([
- #include <linux/kernel.h>
- #include <asm/fpu/api.h>
+ #include <asm/i387.h>
+ #include <asm/xcr.h>
],[
- __kernel_fpu_begin();
+ kernel_fpu_begin();
+ kernel_fpu_end();
],[
- AC_MSG_RESULT(yes)
- AC_DEFINE(HAVE_FPU_API_H, 1, [kernel has <asm/fpu/api.h> interface])
+ AC_MSG_RESULT(kernel_fpu_*)
+ AC_DEFINE(HAVE_KERNEL_FPU, 1, [kernel has kernel_fpu_* functions])
+ AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions])
],[
- AC_MSG_RESULT(no)
+ ZFS_LINUX_TRY_COMPILE([
+ #include <linux/kernel.h>
+ #include <asm/fpu/api.h>
+ ],[
+ __kernel_fpu_begin();
+ __kernel_fpu_end();
+ ],[
+ AC_MSG_RESULT(__kernel_fpu_*)
+ AC_DEFINE(HAVE_UNDERSCORE_KERNEL_FPU, 1, [kernel has __kernel_fpu_* functions])
+ AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions])
+ ],[
+ AC_MSG_RESULT(not exported)
+ ])
])
])
diff --git a/include/linux/simd_x86.h b/include/linux/simd_x86.h
index 10ce02e37..5d6fbed35 100644
--- a/include/linux/simd_x86.h
+++ b/include/linux/simd_x86.h
@@ -81,7 +81,7 @@
#endif
#if defined(_KERNEL)
-#if defined(HAVE_FPU_API_H)
+#if defined(HAVE_UNDERSCORE_KERNEL_FPU)
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#define kfpu_begin() \
@@ -94,12 +94,18 @@
__kernel_fpu_end(); \
preempt_enable(); \
}
-#else
+#elif defined(HAVE_KERNEL_FPU)
#include <asm/i387.h>
#include <asm/xcr.h>
#define kfpu_begin() kernel_fpu_begin()
#define kfpu_end() kernel_fpu_end()
-#endif /* defined(HAVE_FPU_API_H) */
+#else
+/* Kernel doesn't export any kernel_fpu_* functions */
+#include <asm/fpu/internal.h> /* For kernel xgetbv() */
+#define kfpu_begin() panic("This code should never run")
+#define kfpu_end() panic("This code should never run")
+#endif /* defined(HAVE_KERNEL_FPU) */
+
#else
/*
* fpu dummy methods for userspace
@@ -286,11 +292,13 @@ __simd_state_enabled(const uint64_t state)
boolean_t has_osxsave;
uint64_t xcr0;
-#if defined(_KERNEL) && defined(X86_FEATURE_OSXSAVE)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_OSXSAVE) && defined(KERNEL_EXPORTS_X86_FPU)
has_osxsave = !!boot_cpu_has(X86_FEATURE_OSXSAVE);
-#elif defined(_KERNEL) && !defined(X86_FEATURE_OSXSAVE)
- has_osxsave = B_FALSE;
#else
+ has_osxsave = B_FALSE;
+#endif
+#elif !defined(_KERNEL)
has_osxsave = __cpuid_has_osxsave();
#endif
@@ -315,8 +323,12 @@ static inline boolean_t
zfs_sse_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_XMM));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_sse());
#endif
}
@@ -328,8 +340,12 @@ static inline boolean_t
zfs_sse2_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_XMM2));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_sse2());
#endif
}
@@ -341,8 +357,12 @@ static inline boolean_t
zfs_sse3_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_XMM3));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_sse3());
#endif
}
@@ -354,8 +374,12 @@ static inline boolean_t
zfs_ssse3_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_SSSE3));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_ssse3());
#endif
}
@@ -367,8 +391,12 @@ static inline boolean_t
zfs_sse4_1_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_XMM4_1));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_sse4_1());
#endif
}
@@ -380,8 +408,12 @@ static inline boolean_t
zfs_sse4_2_available(void)
{
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_XMM4_2));
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_sse4_2());
#endif
}
@@ -394,8 +426,12 @@ zfs_avx_available(void)
{
boolean_t has_avx;
#if defined(_KERNEL)
+#if defined(KERNEL_EXPORTS_X86_FPU)
has_avx = !!boot_cpu_has(X86_FEATURE_AVX);
#else
+ has_avx = B_FALSE;
+#endif
+#elif !defined(_KERNEL)
has_avx = __cpuid_has_avx();
#endif
@@ -409,11 +445,13 @@ static inline boolean_t
zfs_avx2_available(void)
{
boolean_t has_avx2;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX2)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX2) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx2 = !!boot_cpu_has(X86_FEATURE_AVX2);
-#elif defined(_KERNEL) && !defined(X86_FEATURE_AVX2)
- has_avx2 = B_FALSE;
#else
+ has_avx2 = B_FALSE;
+#endif
+#elif !defined(_KERNEL)
has_avx2 = __cpuid_has_avx2();
#endif
@@ -426,11 +464,13 @@ zfs_avx2_available(void)
static inline boolean_t
zfs_bmi1_available(void)
{
-#if defined(_KERNEL) && defined(X86_FEATURE_BMI1)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_BMI1) && defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_BMI1));
-#elif defined(_KERNEL) && !defined(X86_FEATURE_BMI1)
- return (B_FALSE);
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_bmi1());
#endif
}
@@ -441,11 +481,13 @@ zfs_bmi1_available(void)
static inline boolean_t
zfs_bmi2_available(void)
{
-#if defined(_KERNEL) && defined(X86_FEATURE_BMI2)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_BMI2) && defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_BMI2));
-#elif defined(_KERNEL) && !defined(X86_FEATURE_BMI2)
- return (B_FALSE);
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_bmi2());
#endif
}
@@ -456,11 +498,13 @@ zfs_bmi2_available(void)
static inline boolean_t
zfs_aes_available(void)
{
-#if defined(_KERNEL) && defined(X86_FEATURE_AES)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AES) && defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_AES));
-#elif defined(_KERNEL) && !defined(X86_FEATURE_AES)
- return (B_FALSE);
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_aes());
#endif
}
@@ -471,11 +515,13 @@ zfs_aes_available(void)
static inline boolean_t
zfs_pclmulqdq_available(void)
{
-#if defined(_KERNEL) && defined(X86_FEATURE_PCLMULQDQ)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_PCLMULQDQ) && defined(KERNEL_EXPORTS_X86_FPU)
return (!!boot_cpu_has(X86_FEATURE_PCLMULQDQ));
-#elif defined(_KERNEL) && !defined(X86_FEATURE_PCLMULQDQ)
- return (B_FALSE);
#else
+ return (B_FALSE);
+#endif
+#elif !defined(_KERNEL)
return (__cpuid_has_pclmulqdq());
#endif
}
@@ -503,8 +549,12 @@ zfs_avx512f_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512F)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512F) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = !!boot_cpu_has(X86_FEATURE_AVX512F);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512f();
#endif
@@ -518,9 +568,13 @@ zfs_avx512cd_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512CD)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512CD) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512CD);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512cd();
#endif
@@ -534,9 +588,13 @@ zfs_avx512er_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512ER)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512ER) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512ER);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512er();
#endif
@@ -550,9 +608,13 @@ zfs_avx512pf_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512PF)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512PF) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512PF);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512pf();
#endif
@@ -566,9 +628,13 @@ zfs_avx512bw_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512BW)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512BW) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512BW);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512bw();
#endif
@@ -582,9 +648,13 @@ zfs_avx512dq_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512DQ)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512DQ) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512DQ);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512dq();
#endif
@@ -598,9 +668,13 @@ zfs_avx512vl_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512VL)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512VL) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512VL);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512vl();
#endif
@@ -614,9 +688,13 @@ zfs_avx512ifma_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512IFMA)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512IFMA) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512IFMA);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512ifma();
#endif
@@ -630,9 +708,13 @@ zfs_avx512vbmi_available(void)
{
boolean_t has_avx512 = B_FALSE;
-#if defined(_KERNEL) && defined(X86_FEATURE_AVX512VBMI)
+#if defined(_KERNEL)
+#if defined(X86_FEATURE_AVX512VBMI) && defined(KERNEL_EXPORTS_X86_FPU)
has_avx512 = boot_cpu_has(X86_FEATURE_AVX512F) &&
boot_cpu_has(X86_FEATURE_AVX512VBMI);
+#else
+ has_avx512 = B_FALSE;
+#endif
#elif !defined(_KERNEL)
has_avx512 = __cpuid_has_avx512f() &&
__cpuid_has_avx512vbmi();
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 12:06:43 +0000