From patchwork Thu Sep 19 13:11:39 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 2911421 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 346A5BFF05 for ; Thu, 19 Sep 2013 13:13:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9D2AB20412 for ; Thu, 19 Sep 2013 13:13:36 +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 CD990201B4 for ; Thu, 19 Sep 2013 13:13:31 +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 1VMe2T-00083N-8G; Thu, 19 Sep 2013 13:12:57 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMe2K-0005hV-Ud; Thu, 19 Sep 2013 13:12:48 +0000 Received: from mail-pa0-f41.google.com ([209.85.220.41]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VMe2B-0005e3-Gg for linux-arm-kernel@lists.infradead.org; Thu, 19 Sep 2013 13:12:40 +0000 Received: by mail-pa0-f41.google.com with SMTP id bj1so9707909pad.28 for ; Thu, 19 Sep 2013 06:12:17 -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=ZmSnOGX2qMfApHP1EopRsBx2ob14zt8JWofViFqY+G0=; b=HQA7sco/8Z0tYwpFqzXDh9eO01YbLrTnCJwbS3YW4rYJH/iyeotf3d89ZiPFWH4cUa lna4OBGRRHVYW/xPcOBX05Ptvx4VPN/ZFZlxEHfVnNM151VGgs5chXNiYs9n7REV57wY iNq3uFmPOKkSmy5N37QtuAb4izGK5CUe3y+WCuF1lUv5l6xpaALuq1rEb1VPUmw6MF86 FR3yUUYAr7x0u6Zipz8fcYPObtq+8Yc4svMtX6KCuyQmKnhKIRphwiku3vKnZdZLk1As zxiVWbt++zgrSv7W/IYD0P3nlAOhvobE5P1RmQLkENmsG3/riWUQccKtUbKYC/oXmq6d uoig== X-Gm-Message-State: ALoCoQkFgVhkeaqndiEroD+OvfgdEcG/Z2Mrk7IjdQ+RqdrT/D0fWCo+ElICLkbJyZe44uYzDSf6 X-Received: by 10.66.163.199 with SMTP id yk7mr2720360pab.136.1379596337058; Thu, 19 Sep 2013 06:12:17 -0700 (PDT) Received: from pnqlab006.amcc.com ([182.73.239.130]) by mx.google.com with ESMTPSA id ye1sm12118225pab.19.1969.12.31.16.00.00 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 19 Sep 2013 06:12:16 -0700 (PDT) From: Anup Patel To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 2/4] ARM64: KVM: Implement kvm_vcpu_preferred_target() function Date: Thu, 19 Sep 2013 18:41:39 +0530 Message-Id: <1379596302-21522-3-git-send-email-anup.patel@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1379596302-21522-1-git-send-email-anup.patel@linaro.org> References: <1379596302-21522-1-git-send-email-anup.patel@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130919_091239_704681_8A307E3D X-CRM114-Status: GOOD ( 12.71 ) X-Spam-Score: -2.6 (--) 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 Sawargaonkar 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=-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 patch implements kvm_vcpu_preferred_target() function for KVM ARM64 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/arm64/kvm/guest.c | 21 +++++++++++++++++++++ 2 files changed, 22 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/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index d7bf7d6..4da7882 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -254,6 +254,27 @@ 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 return all optional features are available + * for preferred target. In future, we might have features + * available based on underlying host. + */ + init->target = (__u32)target; + init->features[0] |= (1 << KVM_ARM_VCPU_POWER_OFF); + init->features[0] |= (1 << KVM_ARM_VCPU_EL1_32BIT); + + return 0; +} + int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) { return -EINVAL;