4 * Copyright (C) 2012 ARM Ltd.
5 * Author: Marc Zyngier <marc.zyngier@arm.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <linux/init.h>
21 #include <linux/linkage.h>
22 #include <linux/irqchip/arm-gic-v3.h>
24 #include <asm/assembler.h>
25 #include <asm/kvm_arm.h>
26 #include <asm/kvm_asm.h>
27 #include <asm/ptrace.h>
31 .pushsection .hyp.text, "ax"
35 ENTRY(__hyp_stub_vectors)
36 ventry el2_sync_invalid // Synchronous EL2t
37 ventry el2_irq_invalid // IRQ EL2t
38 ventry el2_fiq_invalid // FIQ EL2t
39 ventry el2_error_invalid // Error EL2t
41 ventry el2_sync_invalid // Synchronous EL2h
42 ventry el2_irq_invalid // IRQ EL2h
43 ventry el2_fiq_invalid // FIQ EL2h
44 ventry el2_error_invalid // Error EL2h
46 ventry el1_sync // Synchronous 64-bit EL1
47 ventry el1_irq_invalid // IRQ 64-bit EL1
48 ventry el1_fiq_invalid // FIQ 64-bit EL1
49 ventry el1_error_invalid // Error 64-bit EL1
51 ventry el1_sync_invalid // Synchronous 32-bit EL1
52 ventry el1_irq_invalid // IRQ 32-bit EL1
53 ventry el1_fiq_invalid // FIQ 32-bit EL1
54 ventry el1_error_invalid // Error 32-bit EL1
55 ENDPROC(__hyp_stub_vectors)
61 lsr x30, x30, #ESR_ELx_EC_SHIFT
63 cmp x30, #ESR_ELx_EC_HVC64
64 b.ne 9f // Not an HVC trap
66 cmp x0, #HVC_GET_VECTORS
71 1: cmp x0, #HVC_SET_VECTORS
76 2: cmp x0, #HVC_SOFT_RESTART
84 /* Someone called kvm_call_hyp() against the hyp-stub... */
85 3: mov x0, #ARM_EXCEPTION_HYP_GONE
90 .macro invalid_vector label
96 invalid_vector el2_sync_invalid
97 invalid_vector el2_irq_invalid
98 invalid_vector el2_fiq_invalid
99 invalid_vector el2_error_invalid
100 invalid_vector el1_sync_invalid
101 invalid_vector el1_irq_invalid
102 invalid_vector el1_fiq_invalid
103 invalid_vector el1_error_invalid
106 * __hyp_set_vectors: Call this after boot to set the initial hypervisor
107 * vectors as part of hypervisor installation. On an SMP system, this should
108 * be called on each CPU.
110 * x0 must be the physical address of the new vector table, and must be
113 * Before calling this, you must check that the stub hypervisor is installed
114 * everywhere, by waiting for any secondary CPUs to be brought up and then
115 * checking that is_hyp_mode_available() is true.
117 * If not, there is a pre-existing hypervisor, some CPUs failed to boot, or
118 * something else went wrong... in such cases, trying to install a new
119 * hypervisor is unlikely to work as desired.
121 * When you call into your shiny new hypervisor, sp_el2 will contain junk,
122 * so you will need to set that to something sensible at the new hypervisor's
123 * initialisation entry point.
126 ENTRY(__hyp_get_vectors)
128 mov x0, #HVC_GET_VECTORS
132 ENDPROC(__hyp_get_vectors)
134 ENTRY(__hyp_set_vectors)
137 mov x0, #HVC_SET_VECTORS
141 ENDPROC(__hyp_set_vectors)