From patchwork Wed Jul 1 18:28:55 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Alex_Benn=C3=A9e?= X-Patchwork-Id: 6705591 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A0BFD9F2F0 for ; Wed, 1 Jul 2015 18:32:14 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B8AB52070B for ; Wed, 1 Jul 2015 18:32:13 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BB2FC20710 for ; Wed, 1 Jul 2015 18:32:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZAMln-0001yI-9r; Wed, 01 Jul 2015 18:30:03 +0000 Received: from mail-wg0-f44.google.com ([74.125.82.44]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZAMlS-0001Nc-Su for linux-arm-kernel@lists.infradead.org; Wed, 01 Jul 2015 18:29:43 +0000 Received: by wguu7 with SMTP id u7so43942230wgu.3 for ; Wed, 01 Jul 2015 11:29:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-type:content-transfer-encoding; bh=CtBK+VaqiC+TL2uKTQDQW5mCreDivO2753avKb7UjHA=; b=XUrU0WoiyBDjZFkXGTHpfW92pyvPJnt6kbwWe50DI+m+oo2/pvDweFGmcsY61cpocs OzkzA/C0GKh+8+TmhMRB+JHg2n5FkivC9tdvJeTQIGyR3HoGNQTjWHOhGGXejiKThSIT 9TKVA6whpkZnr5hK0Vzr0wZY38JsE3dcNmPvDViMO4R0SKS0USKeODLtSHL/LPUIp3l/ OrlfdyjfN2EIcPHpHWBD75Eug6Iy1zdnA71sQ04sv+YomyBws6JyF9rQ9xq/YQJBbv1w XUlaryuL7upEpKUpiM2/9BrEJg3xF4vmFvsfJgrCGMH8jkcCno/LuaTG0rI9XctTFVpO gmVg== X-Gm-Message-State: ALoCoQkyEFUXEbkDlhN6vQzrVqpmim77kfQTZ/f+vI7BNY4dlQrQgllMYBfMwGqcUJl5z4/Zoip5 X-Received: by 10.194.6.229 with SMTP id e5mr4135181wja.158.1435775361333; Wed, 01 Jul 2015 11:29:21 -0700 (PDT) Received: from zen.linaro.local ([81.128.185.34]) by mx.google.com with ESMTPSA id js3sm4116092wjc.5.2015.07.01.11.29.16 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Jul 2015 11:29:20 -0700 (PDT) Received: from zen.linaroharston (localhost [127.0.0.1]) by zen.linaro.local (Postfix) with ESMTP id D140D3E0A24; Wed, 1 Jul 2015 19:29:15 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org, marc.zyngier@arm.com, peter.maydell@linaro.org, agraf@suse.de, drjones@redhat.com, pbonzini@redhat.com, zhichao.huang@linaro.org Subject: [PATCH v7 03/11] KVM: arm: guest debug, add stub KVM_SET_GUEST_DEBUG ioctl Date: Wed, 1 Jul 2015 19:28:55 +0100 Message-Id: <1435775343-20034-4-git-send-email-alex.bennee@linaro.org> X-Mailer: git-send-email 2.4.5 In-Reply-To: <1435775343-20034-1-git-send-email-alex.bennee@linaro.org> References: <1435775343-20034-1-git-send-email-alex.bennee@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150701_112943_094119_06F3ABF3 X-CRM114-Status: GOOD ( 18.26 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Russell King , Jonathan Corbet , Gleb Natapov , jan.kiszka@siemens.com, "open list:DOCUMENTATION" , Will Deacon , open list , dahi@linux.vnet.ibm.com, Catalin Marinas , r65777@freescale.com, bp@suse.de, =?UTF-8?q?Alex=20Benn=C3=A9e?= Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adds a stub function to support the KVM_SET_GUEST_DEBUG ioctl. Any unsupported flag will return -EINVAL. For now, only KVM_GUESTDBG_ENABLE is supported, although it won't have any effects. Signed-off-by: Alex Bennée . Reviewed-by: Christoffer Dall --- v2 - simplified form of the ioctl (stuff will go into setup_debug) v3 - KVM_GUESTDBG_VALID->KVM_GUESTDBG_VALID_MASK - move mask check to the top of function - add ioctl doc header - split capability into separate patch - tweaked commit wording w.r.t return of -EINVAL v4 - add r-b-tag v7 - moved ioctl to arm64/kvm/guest.c, stubbed arm/kvm/guest.c --- Documentation/virtual/kvm/api.txt | 2 +- arch/arm/kvm/arm.c | 7 ------- arch/arm/kvm/guest.c | 6 ++++++ arch/arm64/kvm/guest.c | 27 +++++++++++++++++++++++++++ 4 files changed, 34 insertions(+), 8 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index c34c32d..ba635c7 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2645,7 +2645,7 @@ handled. 4.87 KVM_SET_GUEST_DEBUG Capability: KVM_CAP_SET_GUEST_DEBUG -Architectures: x86, s390, ppc +Architectures: x86, s390, ppc, arm64 Type: vcpu ioctl Parameters: struct kvm_guest_debug (in) Returns: 0 on success; -1 on error diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index d9631ec..92b80bc 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -302,13 +302,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) kvm_arm_set_running_vcpu(NULL); } -int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, - struct kvm_guest_debug *dbg) -{ - return -EINVAL; -} - - int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state) { diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index d503fbb..96e935b 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -290,3 +290,9 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, { return -EINVAL; } + +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + return -EINVAL; +} diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 9535bd5..0ba8677 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -331,3 +331,30 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, { return -EINVAL; } + +#define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE) + +/** + * kvm_arch_vcpu_ioctl_set_guest_debug - set up guest debugging + * @kvm: pointer to the KVM struct + * @kvm_guest_debug: the ioctl data buffer + * + * This sets up and enables the VM for guest debugging. Userspace + * passes in a control flag to enable different debug types and + * potentially other architecture specific information in the rest of + * the structure. + */ +int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg) +{ + if (dbg->control & ~KVM_GUESTDBG_VALID_MASK) + return -EINVAL; + + if (dbg->control & KVM_GUESTDBG_ENABLE) { + vcpu->guest_debug = dbg->control; + } else { + /* If not enabled clear all flags */ + vcpu->guest_debug = 0; + } + return 0; +}