From patchwork Tue Mar 26 17:01:06 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 2341201 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 5AC58E014A for ; Tue, 26 Mar 2013 17:03:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752567Ab3CZRCE (ORCPT ); Tue, 26 Mar 2013 13:02:04 -0400 Received: from service87.mimecast.com ([91.220.42.44]:39601 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752359Ab3CZRCA (ORCPT ); Tue, 26 Mar 2013 13:02:00 -0400 Received: from cam-owa2.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Tue, 26 Mar 2013 17:01:51 +0000 Received: from e102391-lin.cambridge.arm.com ([10.1.255.212]) by cam-owa2.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 26 Mar 2013 17:01:36 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: catalin.marinas@arm.com, will.deacon@arm.com Subject: [PATCH v2 11/30] arm64: KVM: CPU specific system registers handling Date: Tue, 26 Mar 2013 17:01:06 +0000 Message-Id: <1364317285-20937-12-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1364317285-20937-1-git-send-email-marc.zyngier@arm.com> References: <1364317285-20937-1-git-send-email-marc.zyngier@arm.com> X-OriginalArrivalTime: 26 Mar 2013 17:01:36.0981 (UTC) FILETIME=[93B80850:01CE2A43] X-MC-Unique: 113032617015157101 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add the support code for CPU specific system registers. Not much here yet. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs_generic_v8.c | 85 ++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 arch/arm64/kvm/sys_regs_generic_v8.c diff --git a/arch/arm64/kvm/sys_regs_generic_v8.c b/arch/arm64/kvm/sys_regs_generic_v8.c new file mode 100644 index 0000000..a38254b --- /dev/null +++ b/arch/arm64/kvm/sys_regs_generic_v8.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2012 - ARM Ltd + * Author: Marc Zyngier + * + * Based on arch/arm/kvm/coproc_a15.c: + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Authors: Rusty Russell + * Christoffer Dall + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sys_regs.h" + +static bool access_actlr(struct kvm_vcpu *vcpu, + const struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (p->is_write) + return ignore_write(vcpu, p); + + *vcpu_reg(vcpu, p->Rt) = vcpu_sys_reg(vcpu, ACTLR_EL1); + return true; +} + +static void reset_actlr(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r) +{ + u64 actlr; + + asm volatile("mrs %0, actlr_el1\n" : "=r" (actlr)); + vcpu_sys_reg(vcpu, ACTLR_EL1) = actlr; +} + +/* + * Implementation specific sys-reg registers. + * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 + */ +static const struct sys_reg_desc genericv8_sys_regs[] = { + /* ACTLR_EL1 */ + { Op0(0b11), Op1(0b000), CRn(0b0001), CRm(0b0000), Op2(0b001), + access_actlr, reset_actlr, ACTLR_EL1 }, +}; + +static struct kvm_sys_reg_target_table genericv8_target_table = { + .table64 = { + .table = genericv8_sys_regs, + .num = ARRAY_SIZE(genericv8_sys_regs), + }, +}; + +static int __init sys_reg_genericv8_init(void) +{ + unsigned int i; + + for (i = 1; i < ARRAY_SIZE(genericv8_sys_regs); i++) + BUG_ON(cmp_sys_reg(&genericv8_sys_regs[i-1], + &genericv8_sys_regs[i]) >= 0); + + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_AEM_V8, + &genericv8_target_table); + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_FOUNDATION_V8, + &genericv8_target_table); + kvm_register_target_sys_reg_table(KVM_ARM_TARGET_CORTEX_A57, + &genericv8_target_table); + return 0; +} +late_initcall(sys_reg_genericv8_init);