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>
33 ENTRY(__hyp_stub_vectors)
34 ventry el2_sync_invalid // Synchronous EL2t
35 ventry el2_irq_invalid // IRQ EL2t
36 ventry el2_fiq_invalid // FIQ EL2t
37 ventry el2_error_invalid // Error EL2t
39 ventry el2_sync_invalid // Synchronous EL2h
40 ventry el2_irq_invalid // IRQ EL2h
41 ventry el2_fiq_invalid // FIQ EL2h
42 ventry el2_error_invalid // Error EL2h
44 ventry el1_sync // Synchronous 64-bit EL1
45 ventry el1_irq_invalid // IRQ 64-bit EL1
46 ventry el1_fiq_invalid // FIQ 64-bit EL1
47 ventry el1_error_invalid // Error 64-bit EL1
49 ventry el1_sync_invalid // Synchronous 32-bit EL1
50 ventry el1_irq_invalid // IRQ 32-bit EL1
51 ventry el1_fiq_invalid // FIQ 32-bit EL1
52 ventry el1_error_invalid // Error 32-bit EL1
53 ENDPROC(__hyp_stub_vectors)
59 lsr x30, x30, #ESR_ELx_EC_SHIFT
61 cmp x30, #ESR_ELx_EC_HVC64
62 b.ne 9f // Not an HVC trap
64 cmp x0, #HVC_GET_VECTORS
69 1: cmp x0, #HVC_SET_VECTORS
74 /* Someone called kvm_call_hyp() against the hyp-stub... */
75 2: mov x0, #ARM_EXCEPTION_HYP_GONE
80 .macro invalid_vector label
86 invalid_vector el2_sync_invalid
87 invalid_vector el2_irq_invalid
88 invalid_vector el2_fiq_invalid
89 invalid_vector el2_error_invalid
90 invalid_vector el1_sync_invalid
91 invalid_vector el1_irq_invalid
92 invalid_vector el1_fiq_invalid
93 invalid_vector el1_error_invalid
96 * __hyp_set_vectors: Call this after boot to set the initial hypervisor
97 * vectors as part of hypervisor installation. On an SMP system, this should
98 * be called on each CPU.
100 * x0 must be the physical address of the new vector table, and must be
103 * Before calling this, you must check that the stub hypervisor is installed
104 * everywhere, by waiting for any secondary CPUs to be brought up and then
105 * checking that is_hyp_mode_available() is true.
107 * If not, there is a pre-existing hypervisor, some CPUs failed to boot, or
108 * something else went wrong... in such cases, trying to install a new
109 * hypervisor is unlikely to work as desired.
111 * When you call into your shiny new hypervisor, sp_el2 will contain junk,
112 * so you will need to set that to something sensible at the new hypervisor's
113 * initialisation entry point.
116 ENTRY(__hyp_get_vectors)
118 mov x0, #HVC_GET_VECTORS
122 ENDPROC(__hyp_get_vectors)
124 ENTRY(__hyp_set_vectors)
127 mov x0, #HVC_SET_VECTORS
131 ENDPROC(__hyp_set_vectors)