1 files changed, 68 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/asm/fpu/api.h b/sys/compat/linuxkpi/common/include/asm/fpu/api.h
new file mode 100644
index 000000000000..035ec3620fdd
--- /dev/null
+++ b/sys/compat/linuxkpi/common/include/asm/fpu/api.h
@@ -0,0 +1,68 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ * 
+ * Copyright (c) 2020 Greg V <greg@unrelenting.technology>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef	_FPU_API_H_
+#define	_FPU_API_H_
+
+#if defined(__aarch64__) || defined(__amd64__) || defined(__i386__)
+
+#include <machine/fpu.h>
+
+extern struct fpu_kern_ctx *__lkpi_fpu_ctx;
+extern unsigned int __lkpi_fpu_ctx_level;
+
+static inline void
+kernel_fpu_begin()
+{
+	if (__lkpi_fpu_ctx_level++ == 0) {
+		fpu_kern_enter(curthread, __lkpi_fpu_ctx, FPU_KERN_NORMAL);
+	}
+}
+
+static inline void
+kernel_fpu_end()
+{
+	if (--__lkpi_fpu_ctx_level == 0) {
+		fpu_kern_leave(curthread, __lkpi_fpu_ctx);
+	}
+}
+
+#else
+
+static inline void
+kernel_fpu_begin()
+{
+}
+
+static inline void
+kernel_fpu_end()
+{
+}
+
+#endif
+
+#endif /* _FPU_API_H_ */