From patchwork Wed Sep 25 09:26:00 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 2941011 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 [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0336D9F288 for ; Wed, 25 Sep 2013 09:28:00 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D5DD72057D for ; Wed, 25 Sep 2013 09:27:58 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6B44C2057B for ; Wed, 25 Sep 2013 09:27:57 +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 1VOlNe-0005Y0-W6; Wed, 25 Sep 2013 09:27:35 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VOlNY-000241-8e; Wed, 25 Sep 2013 09:27:28 +0000 Received: from mail-pd0-f179.google.com ([209.85.192.179]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VOlNN-0001zw-SA for linux-arm-kernel@lists.infradead.org; Wed, 25 Sep 2013 09:27:19 +0000 Received: by mail-pd0-f179.google.com with SMTP id v10so5804088pde.24 for ; Wed, 25 Sep 2013 02:26:56 -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; bh=a/Q+Wm3fSPYwkIrQiO2l8ASwS0PE3kBuurfA6EgbgjQ=; b=LJduCk3CsirsknbrSFyOt/z7GK6Le4FIWoR0XzeVT6hxgzzJRdKyt+/e9YxP0f7/Bi qpRNstzEYLqdfKasOIqe1Gj0B2j6WZbtN2NOwiolqGKwDYQKJknswn3q+VSgDrg5GDk/ T300p28JQXN3HBX9aPeeQhFX1Kn3u7fTKWq2Sw+KGbZ762gDqiKodx6IbnTjilxl9Xkc vW9iL3JV1jzIt/3w4jGIrx+AT/WfcbtzlX77j/D/PxPOquomyw18YAi3/SVi05yDBIWk Ghvl+nhc5DKOImqMy79kzyPBID2Dyb7YNzu7DM0aJM+4hyIRlEi2exaLilLB2ek44Wus NB4g== X-Gm-Message-State: ALoCoQmNRl07eBPNHkcPHn5WVXGWWStsk+ZVe+36vknmYLqCzybQIdlIUjl/yYs7irU9/9n6AVMP X-Received: by 10.66.136.71 with SMTP id py7mr33189445pab.2.1380101216511; Wed, 25 Sep 2013 02:26:56 -0700 (PDT) Received: from pnqlab006.amcc.com ([182.73.239.130]) by mx.google.com with ESMTPSA id k4sm46364649pbd.11.1969.12.31.16.00.00 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 25 Sep 2013 02:26:55 -0700 (PDT) From: Anup Patel To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v4 1/4] ARM: KVM: Implement kvm_vcpu_preferred_target() function Date: Wed, 25 Sep 2013 14:56:00 +0530 Message-Id: <1380101163-20028-2-git-send-email-anup.patel@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1380101163-20028-1-git-send-email-anup.patel@linaro.org> References: <1380101163-20028-1-git-send-email-anup.patel@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130925_052718_038110_95629679 X-CRM114-Status: GOOD ( 12.64 ) X-Spam-Score: -1.9 (-) Cc: linaro-kernel@lists.linaro.org, Anup Patel , patches@linaro.org, marc.zyngier@arm.com, linux-arm-kernel@lists.infradead.org, christoffer.dall@linaro.org, pranavkumar@linaro.org 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 X-Spam-Status: No, score=-6.2 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 patch implements kvm_vcpu_preferred_target() function for KVM ARM which will help us implement KVM_ARM_PREFERRED_TARGET ioctl for user space. Signed-off-by: Anup Patel Signed-off-by: Pranavkumar Sawargaonkar --- arch/arm/include/asm/kvm_host.h | 1 + arch/arm/kvm/guest.c | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 7d22517..76f3c19 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -154,6 +154,7 @@ struct kvm_vcpu_stat { struct kvm_vcpu_init; int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, const struct kvm_vcpu_init *init); +int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); struct kvm_one_reg; diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 152d036..21beea0 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -222,6 +222,26 @@ int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, return kvm_reset_vcpu(vcpu); } +int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init) +{ + int target = kvm_target_cpu(); + + if (target < 0) + return -ENODEV; + + memset(init, 0, sizeof(*init)); + + /* + * For now, we don't return any features. + * In future, we might use features to return target + * specific features available for the preferred + * target type. + */ + init->target = (__u32)target; + + return 0; +} + int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) { return -EINVAL;