From patchwork Fri Jan 27 01:04:59 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jintack Lim X-Patchwork-Id: 9540499 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7CF3760429 for ; Fri, 27 Jan 2017 01:08:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6DD3B281C3 for ; Fri, 27 Jan 2017 01:08:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 612FA2831C; Fri, 27 Jan 2017 01:08:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.4 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RCVD_IN_SORBS_SPAM autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E6579281C3 for ; Fri, 27 Jan 2017 01:08:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753584AbdA0BGq (ORCPT ); Thu, 26 Jan 2017 20:06:46 -0500 Received: from outprodmail02.cc.columbia.edu ([128.59.72.51]:58110 "EHLO outprodmail02.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753115AbdA0BGZ (ORCPT ); Thu, 26 Jan 2017 20:06:25 -0500 Received: from hazelnut (hazelnut.cc.columbia.edu [128.59.213.250]) by outprodmail02.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v0R14A1R063678 for ; Thu, 26 Jan 2017 20:05:11 -0500 Received: from hazelnut (localhost.localdomain [127.0.0.1]) by hazelnut (Postfix) with ESMTP id 4872E93 for ; Thu, 26 Jan 2017 20:05:11 -0500 (EST) Received: from sendprodmail04.cc.columbia.edu (sendprodmail04.cc.columbia.edu [128.59.72.16]) by hazelnut (Postfix) with ESMTP id 27CBD98 for ; Thu, 26 Jan 2017 20:05:11 -0500 (EST) Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by sendprodmail04.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v0R15AB0011965 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 26 Jan 2017 20:05:11 -0500 Received: by mail-qt0-f199.google.com with SMTP id x49so254845145qtc.7 for ; Thu, 26 Jan 2017 17:05:11 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=N718/eRfGTShf6XE/lpkc8jabz8uSytFE3LBf1y+F/I=; b=fM+Henic3JoZSJLNrjEML3WTGFZAHPyp5/FC4gUnJ3weY5f9CSbZmd20wyB0Z93Ktc WUfxCWzSRC7I8DHSjsB3w3+RRaBC9nxcry53NRGPbKa98+UV7sMlwZzdEm6mY8dpWX3j Jn6sABftReJmAE4dIcQz04G8fSAKkfPj9cP/SDvWRX8uocay9wucyrXwEgCTXa9wANdr FIIPE07e8iYrDBRFQ/UJajj2y7KGl90Vmf+hLUMLG+Fdqog1Ii7HTuNRWEl99rufbKlR yEHOD7kbjNezFMwz0SjTN5Bxq+RId9PlgV2rbopOWBkuEg59ZtbNYZ1rVBiy5voBFF7R 0uOg== X-Gm-Message-State: AIkVDXJZnz5v3GffoA1MkUmpYlyVJBSC2HB6Yk4doxeBIanGob5sPL5Hdb9qmegrfP0wCrQi22Yqfn6ox9tvmFsOR/q85fHHOeng+BsgBNYkp/e7lYqGDau3orOWriRpBH0pKl7hFV26428= X-Received: by 10.55.167.5 with SMTP id q5mr5679375qke.61.1485479110722; Thu, 26 Jan 2017 17:05:10 -0800 (PST) X-Received: by 10.55.167.5 with SMTP id q5mr5679365qke.61.1485479110520; Thu, 26 Jan 2017 17:05:10 -0800 (PST) Received: from jintack.cs.columbia.edu ([2001:18d8:ffff:16:21a:4aff:feaa:f900]) by smtp.gmail.com with ESMTPSA id f68sm2709538qkf.34.2017.01.26.17.05.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 26 Jan 2017 17:05:09 -0800 (PST) From: Jintack Lim To: pbonzini@redhat.com, rkrcmar@redhat.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, andre.przywara@arm.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Subject: [RFC v2 09/10] KVM: arm64: Add the EL1 physical timer access handler Date: Thu, 26 Jan 2017 20:04:59 -0500 Message-Id: <1485479100-4966-10-git-send-email-jintack@cs.columbia.edu> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1485479100-4966-1-git-send-email-jintack@cs.columbia.edu> References: <1485479100-4966-1-git-send-email-jintack@cs.columbia.edu> X-No-Spam-Score: Local X-Scanned-By: MIMEDefang 2.78 on 128.59.72.16 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP KVM traps on the EL1 phys timer accesses from VMs, but it doesn't handle those traps. This results in terminating VMs. Instead, set a handler for the EL1 phys timer access, and inject an undefined exception as an intermediate step. Signed-off-by: Jintack Lim --- arch/arm64/kvm/sys_regs.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 87e7e66..fd9e747 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -820,6 +820,30 @@ static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, CRm((0b1100 | (((n) >> 3) & 0x3))), Op2(((n) & 0x7)), \ access_pmu_evtyper, reset_unknown, (PMEVTYPER0_EL0 + n), } +static bool access_cntp_tval(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + +static bool access_cntp_ctl(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + +static bool access_cntp_cval(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + kvm_inject_undefined(vcpu); + return true; +} + /* * Architected system registers. * Important: Must be sorted ascending by Op0, Op1, CRn, CRm, Op2 @@ -1029,6 +1053,16 @@ static bool access_pmuserenr(struct kvm_vcpu *vcpu, struct sys_reg_params *p, { Op0(0b11), Op1(0b011), CRn(0b1101), CRm(0b0000), Op2(0b011), NULL, reset_unknown, TPIDRRO_EL0 }, + /* CNTP_TVAL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b000), + access_cntp_tval }, + /* CNTP_CTL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b001), + access_cntp_ctl }, + /* CNTP_CVAL_EL0 */ + { Op0(0b11), Op1(0b011), CRn(0b1110), CRm(0b0010), Op2(0b010), + access_cntp_cval }, + /* PMEVCNTRn_EL0 */ PMU_PMEVCNTR_EL0(0), PMU_PMEVCNTR_EL0(1),