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
34static 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_read_sys_reg(vcpu, ACTLR_EL1);
42	return true;
43}
44
45static 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 */
54static const struct sys_reg_desc genericv8_sys_regs[] = {
55	{ SYS_DESC(SYS_ACTLR_EL1), access_actlr, reset_actlr, ACTLR_EL1 },
56};
57
58static const struct sys_reg_desc genericv8_cp15_regs[] = {
59	/* ACTLR */
60	{ Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001),
61	  access_actlr },
62};
63
64static 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
75static 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}
98late_initcall(sys_reg_genericv8_init);