1 /*
2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
4 *
5 * Based on arch/arm/kvm/coproc_a15.c:
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Authors: Rusty Russell <rusty@rustcorp.au>
8 * Christoffer Dall <c.dall@virtualopensystems.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License, version 2, as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22 #include <linux/kvm_host.h>
23 #include <asm/cputype.h>
24 #include <asm/kvm_arm.h>
25 #include <asm/kvm_asm.h>
26 #include <asm/kvm_host.h>
27 #include <asm/kvm_emulate.h>
28 #include <asm/kvm_coproc.h>
29 #include <asm/sysreg.h>
30 #include <linux/init.h>
31
32 #include "sys_regs.h"
33
access_actlr(struct kvm_vcpu * vcpu,struct sys_reg_params * p,const struct sys_reg_desc * r)34 static bool access_actlr(struct kvm_vcpu *vcpu,
35 struct sys_reg_params *p,
36 const struct sys_reg_desc *r)
37 {
38 if (p->is_write)
39 return ignore_write(vcpu, p);
40
41 p->regval = vcpu_sys_reg(vcpu, ACTLR_EL1);
42 return true;
43 }
44
reset_actlr(struct kvm_vcpu * vcpu,const struct sys_reg_desc * r)45 static void reset_actlr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
46 {
47 vcpu_sys_reg(vcpu, ACTLR_EL1) = read_sysreg(actlr_el1);
48 }
49
50 /*
51 * Implementation specific sys-reg registers.
52 * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2
53 */
54 static const struct sys_reg_desc genericv8_sys_regs[] = {
55 { SYS_DESC(SYS_ACTLR_EL1), access_actlr, reset_actlr, ACTLR_EL1 },
56 };
57
58 static const struct sys_reg_desc genericv8_cp15_regs[] = {
59 /* ACTLR */
60 { Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001),
61 access_actlr },
62 };
63
64 static struct kvm_sys_reg_target_table genericv8_target_table = {
65 .table64 = {
66 .table = genericv8_sys_regs,
67 .num = ARRAY_SIZE(genericv8_sys_regs),
68 },
69 .table32 = {
70 .table = genericv8_cp15_regs,
71 .num = ARRAY_SIZE(genericv8_cp15_regs),
72 },
73 };
74
sys_reg_genericv8_init(void)75 static int __init sys_reg_genericv8_init(void)
76 {
77 unsigned int i;
78
79 for (i = 1; i < ARRAY_SIZE(genericv8_sys_regs); i++)
80 BUG_ON(cmp_sys_reg(&genericv8_sys_regs[i-1],
81 &genericv8_sys_regs[i]) >= 0);
82
83 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_AEM_V8,
84 &genericv8_target_table);
85 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_FOUNDATION_V8,
86 &genericv8_target_table);
87 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A53,
88 &genericv8_target_table);
89 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A57,
90 &genericv8_target_table);
91 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_XGENE_POTENZA,
92 &genericv8_target_table);
93 kvm_register_target_sys_reg_table(KVM_ARM_TARGET_GENERIC_V8,
94 &genericv8_target_table);
95
96 return 0;
97 }
98 late_initcall(sys_reg_genericv8_init);
99