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System register accesses also use zero register for Rt == 31, and therefore using it will also result in getting SP value instead. This patch makes them also using new accessors, introduced by the previous patch. Since register value is no longer directly associated with storage inside vCPU context structure, we introduce a dedicated storage for it in struct sys_reg_params. This refactor also gets rid of "massive hack" in kvm_handle_cp_64(). Signed-off-by: Pavel Fedin <p.fedin@samsung.com> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*
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* Copyright (C) 2012,2013 - ARM Ltd
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* Author: Marc Zyngier <marc.zyngier@arm.com>
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*
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* Based on arch/arm/kvm/coproc_a15.c:
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Authors: Rusty Russell <rusty@rustcorp.au>
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* Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kvm_host.h>
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#include <asm/cputype.h>
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#include <asm/kvm_arm.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_host.h>
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#include <asm/kvm_emulate.h>
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#include <asm/kvm_coproc.h>
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#include <linux/init.h>
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#include "sys_regs.h"
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static bool access_actlr(struct kvm_vcpu *vcpu,
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struct sys_reg_params *p,
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const struct sys_reg_desc *r)
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{
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if (p->is_write)
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return ignore_write(vcpu, p);
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p->regval = vcpu_sys_reg(vcpu, ACTLR_EL1);
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return true;
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}
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static void reset_actlr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r)
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{
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u64 actlr;
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asm volatile("mrs %0, actlr_el1\n" : "=r" (actlr));
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vcpu_sys_reg(vcpu, ACTLR_EL1) = actlr;
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}
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/*
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* Implementation specific sys-reg registers.
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* Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2
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*/
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static const struct sys_reg_desc genericv8_sys_regs[] = {
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/* ACTLR_EL1 */
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{ Op0(0b11), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001),
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access_actlr, reset_actlr, ACTLR_EL1 },
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};
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static const struct sys_reg_desc genericv8_cp15_regs[] = {
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/* ACTLR */
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{ Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001),
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access_actlr },
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};
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static struct kvm_sys_reg_target_table genericv8_target_table = {
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.table64 = {
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.table = genericv8_sys_regs,
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.num = ARRAY_SIZE(genericv8_sys_regs),
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},
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.table32 = {
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.table = genericv8_cp15_regs,
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.num = ARRAY_SIZE(genericv8_cp15_regs),
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},
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};
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static int __init sys_reg_genericv8_init(void)
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{
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unsigned int i;
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for (i = 1; i < ARRAY_SIZE(genericv8_sys_regs); i++)
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BUG_ON(cmp_sys_reg(&genericv8_sys_regs[i-1],
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&genericv8_sys_regs[i]) >= 0);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_AEM_V8,
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&genericv8_target_table);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_FOUNDATION_V8,
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&genericv8_target_table);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A53,
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&genericv8_target_table);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A57,
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&genericv8_target_table);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_XGENE_POTENZA,
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&genericv8_target_table);
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kvm_register_target_sys_reg_table(KVM_ARM_TARGET_GENERIC_V8,
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&genericv8_target_table);
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return 0;
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}
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late_initcall(sys_reg_genericv8_init);
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