arm64/vmm: Add the VHE exception and switcher files

These just need to include the common code with macros to ensure it is
built correctly.

Sponsored by:	Arm Ltd
Differential Revision:	https://reviews.freebsd.org/D46083

sys/arm64/vmm/vmm_vhe.c

@@ -0,0 +1,39 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Arm Ltd
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+
+#include "vmm_handlers.h"
+
+#define	VMM_VHE
+
+#define	VMM_STATIC
+#define	VMM_HYP_FUNC(func)	vmm_vhe_ ## func
+
+#define	guest_or_nonvhe(guest)	(guest)
+#define	EL1_REG(reg)		MRS_REG_ALT_NAME(reg ## _EL12)
+#define	EL0_REG(reg)		MRS_REG_ALT_NAME(reg ## _EL02)
+
+#include "vmm_hyp.c"

sys/arm64/vmm/vmm_vhe_exception.S

@@ -0,0 +1,31 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024 Arm Ltd
+ *
+ * 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 AUTHOR 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 AUTHOR 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.
+ */
+
+#define VMM_VHE
+#define	VMM_HYP_FUNC(func)	vmm_vhe_ ## func
+
+#include "vmm_hyp_exception.S"

sys/conf/files.arm64

@@ -145,6 +145,8 @@ vmm_hyp_blob.bin				optional vmm		\
 arm64/vmm/vmm_hyp_el2.S				optional vmm		\
 	dependency	vmm_hyp_blob.bin
 arm64/vmm/vmm_mmu.c				optional vmm
+arm64/vmm/vmm_vhe.c				optional vmm
+arm64/vmm/vmm_vhe_exception.S			optional vmm
 arm64/vmm/io/vgic.c				optional vmm
 arm64/vmm/io/vgic_v3.c				optional vmm
 arm64/vmm/io/vgic_if.m				optional vmm

sys/modules/vmm/Makefile

@@ -30,6 +30,8 @@ SRCS+=	vmm_arm64.c \
 	vmm_call.S \
 	vmm_handlers.c \
 	vmm_mmu.c \
+	vmm_vhe_exception.S \
+	vmm_vhe.c \
 	vmm_hyp_el2.S
 
 .PATH: ${SRCTOP}/sys/${MACHINE}/vmm/io