From patchwork Tue Mar 26 17:01:07 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 2341321 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 0E463E014A for ; Tue, 26 Mar 2013 17:03:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752978Ab3CZRDN (ORCPT ); Tue, 26 Mar 2013 13:03:13 -0400 Received: from service87.mimecast.com ([91.220.42.44]:40155 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752373Ab3CZRCA (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 17:01:52 +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 17:01:37 +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 12/30] arm64: KVM: virtual CPU reset Date: Tue, 26 Mar 2013 17:01:07 +0000 Message-Id: <1364317285-20937-13-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 17:01:37.0356 (UTC) FILETIME=[93F140C0:01CE2A43] X-MC-Unique: 113032617015232201 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Provide the reset code for a virtual CPU booted in 64bit mode. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/reset.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 arch/arm64/kvm/reset.c diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c new file mode 100644 index 0000000..8cb0244 --- /dev/null +++ b/arch/arm64/kvm/reset.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2012 - ARM Ltd + * Author: Marc Zyngier + * + * Derived from arch/arm/kvm/reset.c + * Copyright (C) 2012 - Virtual Open Systems and Columbia University + * Author: 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 + +/* + * ARMv8 Reset Values + */ +static struct kvm_regs default_regs_reset = { + .regs.pstate = PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT, +}; + +/** + * kvm_reset_vcpu - sets core registers and sys_regs to reset value + * @vcpu: The VCPU pointer + * + * This function finds the right table above and sets the registers on + * the virtual CPU struct to their architectually defined reset + * values. + */ +int kvm_reset_vcpu(struct kvm_vcpu *vcpu) +{ + struct kvm_regs *cpu_reset; + + switch (vcpu->arch.target) { + default: + cpu_reset = &default_regs_reset; + break; + } + + /* Reset core registers */ + memcpy(vcpu_gp_regs(vcpu), cpu_reset, sizeof(*cpu_reset)); + + /* Reset system registers */ + kvm_reset_sys_regs(vcpu); + + return 0; +}