From patchwork Tue May 14 14:13:39 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 2568521 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) by patchwork1.kernel.org (Postfix) with ESMTP id 7B8023FC5A for ; Tue, 14 May 2013 20:38:10 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcG8t-0002q7-4v; Tue, 14 May 2013 14:24:10 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcG2L-0007gO-Nc; Tue, 14 May 2013 14:17:05 +0000 Received: from service87.mimecast.com ([91.220.42.44]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcG0B-0007KU-60 for linux-arm-kernel@lists.infradead.org; Tue, 14 May 2013 14:15:13 +0000 Received: from cam-owa1.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Tue, 14 May 2013 15:14:27 +0100 Received: from e102391-lin.cambridge.arm.com ([10.1.255.212]) by cam-owa1.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.0); Tue, 14 May 2013 15:14:25 +0100 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v4 11/32] arm64: KVM: virtual CPU reset Date: Tue, 14 May 2013 15:13:39 +0100 Message-Id: <1368540840-26750-12-git-send-email-marc.zyngier@arm.com> X-Mailer: git-send-email 1.8.2.3 In-Reply-To: <1368540840-26750-1-git-send-email-marc.zyngier@arm.com> References: <1368540840-26750-1-git-send-email-marc.zyngier@arm.com> X-OriginalArrivalTime: 14 May 2013 14:14:25.0223 (UTC) FILETIME=[5690FD70:01CE50AD] X-MC-Unique: 113051415142708701 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130514_101451_690889_D0487340 X-CRM114-Status: GOOD ( 12.60 ) X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [91.220.42.44 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: catalin.marinas@arm.com, will.deacon@arm.com, Christopher Covington , gleb@redhat.com, pbonzini@redhat.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Provide the reset code for a virtual CPU booted in 64bit mode. Reviewed-by: Christopher Covington Signed-off-by: Marc Zyngier Reviewed-by: Catalin Marinas --- arch/arm64/kvm/reset.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 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..84112e0 --- /dev/null +++ b/arch/arm64/kvm/reset.c @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2012,2013 - 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 | PSR_D_BIT), +}; + +int kvm_arch_dev_ioctl_check_extension(long ext) +{ + int r; + + switch (ext) { + default: + r = 0; + } + + return r; +} + + +/** + * 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; +}