From patchwork Mon Sep 30 08:50:05 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 2962951 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 44ACFBFF0B for ; Mon, 30 Sep 2013 08:52:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 34167201EE for ; Mon, 30 Sep 2013 08:52:25 +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 6A18F201C7 for ; Mon, 30 Sep 2013 08:52:20 +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 1VQZCY-0003CQ-BL; Mon, 30 Sep 2013 08:51:34 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VQZCK-0004j7-JL; Mon, 30 Sep 2013 08:51:20 +0000 Received: from mail-pb0-f47.google.com ([209.85.160.47]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VQZCH-0004gx-IL for linux-arm-kernel@lists.infradead.org; Mon, 30 Sep 2013 08:51:18 +0000 Received: by mail-pb0-f47.google.com with SMTP id rr4so5280960pbb.6 for ; Mon, 30 Sep 2013 01:50:56 -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=JJQ8N1Nge4Oam6XB38H8pnfdw90YwPzvPgU4JfoozytKrIsm3HlsMKn9ykumW/vLxe n8MWLU8yV5u8CU3OqiyhWW7uccDsIu5LxuoCbaGbeoJHjyLQbFcH2NGsJGCbBzYF0kAD qrvPB2DLG/D1NWEg0mqDfQmH75Tgqt7ED4SN4//bimZ5sulconDJEmjSCY/uCJzE1ckg WwpvBlve2PqEcre4K19borzr/WV04oJjDj3E1WZC2XHvepkiveU3AGWwc3drkllpLUD3 RKNzfvn9vJ7S7RvR+N3yz/gjvpiDThTA3ijribj0So8mVrxg4QxCV+/2jJRRBOwXrB6T 9VfQ== X-Gm-Message-State: ALoCoQkkLF/EVg5p1XGQ+N4fNbPYx53FT/TKlru9O3z7GeLqbegLRC2HbsiSvdwFZP7Kl/BraOdF X-Received: by 10.66.122.100 with SMTP id lr4mr1694861pab.164.1380531056001; Mon, 30 Sep 2013 01:50:56 -0700 (PDT) Received: from pnqlab006.amcc.com ([182.73.239.130]) by mx.google.com with ESMTPSA id ta10sm31664460pab.5.1969.12.31.16.00.00 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 30 Sep 2013 01:50:55 -0700 (PDT) From: Anup Patel To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v5 1/4] ARM: KVM: Implement kvm_vcpu_preferred_target() function Date: Mon, 30 Sep 2013 14:20:05 +0530 Message-Id: <1380531008-15901-2-git-send-email-anup.patel@linaro.org> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1380531008-15901-1-git-send-email-anup.patel@linaro.org> References: <1380531008-15901-1-git-send-email-anup.patel@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130930_045117_722730_F63B8A60 X-CRM114-Status: GOOD ( 12.75 ) 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@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=-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 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;