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Linux 5.0 compat: SIMD compatibility

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Restore the SIMD optimization for 4.19.38 LTS, 4.14.120 LTS,
and 5.0 and newer kernels.

This commit squashes the following commits from master in to
a single commit which can be applied to 0.8.2.

10fa2545 - Linux 4.14, 4.19, 5.0+ compat: SIMD save/restore
b88ca2ac - Enable SIMD for encryption
095b5412 - Fix CONFIG_X86_DEBUG_FPU build failure
e5db3134 - Linux 5.0 compat: SIMD compatibility

Reviewed-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
TEST_ZIMPORT_SKIP="yes"
This commit is contained in:
Brian Behlendorf
2019-07-12 09:31:20 -07:00
committed by Tony Hutter
parent 988b040476
commit 62c034f6d4
30 changed files with 548 additions and 206 deletions
Download Patch File Download Diff File Expand all files Collapse all files
config/kernel-fpu.m4
+69 -8
View File
@@ -2,8 +2,9 @@ dnl #
dnl # Handle differences in kernel FPU code.
dnl #
dnl # Kernel
dnl # 5.0: All kernel fpu functions are GPL only, so we can't use them.
dnl # (nothing defined)
dnl # 5.0: Wrappers have been introduced to save/restore the FPU state.
dnl # This change was made to the 4.19.38 and 4.14.120 LTS kernels.
dnl # HAVE_KERNEL_FPU_INTERNAL
dnl #
dnl # 4.2: Use __kernel_fpu_{begin,end}()
dnl # HAVE_UNDERSCORE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU
@@ -12,7 +13,11 @@ 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([which kernel_fpu header to use])
dnl #
dnl # N.B. The header check is performed before all other checks since
dnl # it depends on HAVE_KERNEL_FPU_API_HEADER being set in confdefs.h.
dnl #
AC_MSG_CHECKING([whether fpu headers are available])
ZFS_LINUX_TRY_COMPILE([
#include <linux/module.h>
#include <asm/fpu/api.h>
@@ -25,9 +30,13 @@ AC_DEFUN([ZFS_AC_KERNEL_FPU], [
AC_MSG_RESULT(i387.h & xcr.h)
])
AC_MSG_CHECKING([which kernel_fpu function to use])
dnl #
dnl # Legacy kernel
dnl #
AC_MSG_CHECKING([whether kernel fpu is available])
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/module.h>
#include <linux/types.h>
#ifdef HAVE_KERNEL_FPU_API_HEADER
#include <asm/fpu/api.h>
#else
@@ -45,8 +54,12 @@ AC_DEFUN([ZFS_AC_KERNEL_FPU], [
AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1,
[kernel exports FPU functions])
],[
dnl #
dnl # Linux 4.2 kernel
dnl #
ZFS_LINUX_TRY_COMPILE_SYMBOL([
#include <linux/module.h>
#include <linux/types.h>
#ifdef HAVE_KERNEL_FPU_API_HEADER
#include <asm/fpu/api.h>
#else
@@ -57,12 +70,60 @@ AC_DEFUN([ZFS_AC_KERNEL_FPU], [
],[
__kernel_fpu_begin();
__kernel_fpu_end();
], [__kernel_fpu_begin], [arch/x86/kernel/fpu/core.c arch/x86/kernel/i387.c], [
], [__kernel_fpu_begin],
[arch/x86/kernel/fpu/core.c arch/x86/kernel/i387.c], [
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_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)
ZFS_LINUX_TRY_COMPILE([
#include <linux/module.h>
#if defined(__x86_64) || defined(__x86_64__) || \
defined(__i386) || defined(__i386__)
#if !defined(__x86)
#define __x86
#endif
#endif
#if !defined(__x86)
#error Unsupported architecture
#endif
#include <linux/types.h>
#ifdef HAVE_KERNEL_FPU_API_HEADER
#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
#else
#include <asm/i387.h>
#include <asm/xcr.h>
#endif
#if !defined(XSTATE_XSAVE)
#error XSTATE_XSAVE not defined
#endif
#if !defined(XSTATE_XRESTORE)
#error XSTATE_XRESTORE not defined
#endif
],[
struct fpu *fpu = &current->thread.fpu;
union fpregs_state *st = &fpu->state;
struct fregs_state *fr __attribute__ ((unused)) =
&st->fsave;
struct fxregs_state *fxr __attribute__ ((unused)) =
&st->fxsave;
struct xregs_state *xr __attribute__ ((unused)) =
&st->xsave;
], [
AC_MSG_RESULT(internal)
AC_DEFINE(HAVE_KERNEL_FPU_INTERNAL, 1,
[kernel fpu internal])
],[
AC_MSG_RESULT(unavailable)
])
])
])
])