2 * Copyright (C) 2015 Mihai Carabas <mihai.carabas@gmail.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/syscall.h>
29 #include <machine/asm.h>
30 #include <machine/asmacros.h>
31 #include <machine/armreg.h>
32 #include <machine/sysreg.h>
34 #if defined(__ARM_ARCH_7VE__) || defined(__clang__)
38 ASENTRY_NP(hypervisor_stub_vect_install)
40 /* Install hypervisor stub vectors. */
41 adr r0, hypervisor_stub_vect
44 /* Disable all the traps in the hypervisor. */
51 /* Don't disable access to perf-mon from PL0,1 and preserve HPMN. */
53 and r0, #(ARM_CP15_HDCR_HPMN)
54 /* Caller implicit instruction barrier in the ERET. */
59 END(hypervisor_stub_vect_install)
61 ASENTRY_NP(hypervisor_stub_trap)
63 * If the first parameter is -1 than return the
64 * exception vector (HVBAR), otherwise set it to
71 END(hypervisor_stub_trap)
73 .globl hypervisor_stub_vect
75 _C_LABEL(hypervisor_stub_vect):
81 b hypervisor_stub_trap /* HYP-Mode */
84 #endif /* __ARM_ARCH >= 7 */