From patchwork Thu Apr 18 10:39:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 10906999 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 973261515 for ; Thu, 18 Apr 2019 10:47:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8071728BAE for ; Thu, 18 Apr 2019 10:47:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 743E228BB1; Thu, 18 Apr 2019 10:47:31 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham 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 6963028BAE for ; Thu, 18 Apr 2019 10:47:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388474AbfDRKr3 (ORCPT ); Thu, 18 Apr 2019 06:47:29 -0400 Received: from 2.mo4.mail-out.ovh.net ([46.105.72.36]:46120 "EHLO 2.mo4.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388382AbfDRKr3 (ORCPT ); Thu, 18 Apr 2019 06:47:29 -0400 Received: from player758.ha.ovh.net (unknown [10.108.54.74]) by mo4.mail-out.ovh.net (Postfix) with ESMTP id 5902B1E49AC for ; Thu, 18 Apr 2019 12:41:01 +0200 (CEST) Received: from kaod.org (lfbn-1-10649-41.w90-89.abo.wanadoo.fr [90.89.235.41]) (Authenticated sender: clg@kaod.org) by player758.ha.ovh.net (Postfix) with ESMTPSA id A315E4EF6A15; Thu, 18 Apr 2019 10:40:54 +0000 (UTC) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: kvm-ppc@vger.kernel.org Cc: Paul Mackerras , David Gibson , kvm@vger.kernel.org, =?utf-8?q?C=C3=A9dric_Le_Goater?= , Paolo Bonzini Subject: [PATCH v6 11/17] KVM: introduce a 'mmap' method for KVM devices Date: Thu, 18 Apr 2019 12:39:36 +0200 Message-Id: <20190418103942.2883-12-clg@kaod.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190418103942.2883-1-clg@kaod.org> References: <20190418103942.2883-1-clg@kaod.org> MIME-Version: 1.0 X-Ovh-Tracer-Id: 6070007876428467159 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduuddrfeehgddviecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Some KVM devices will want to handle special mappings related to the underlying HW. For instance, the XIVE interrupt controller of the POWER9 processor has MMIO pages for thread interrupt management and for interrupt source control that need to be exposed to the guest when the OS has the required support. Cc: Paolo Bonzini Signed-off-by: Cédric Le Goater Reviewed-by: David Gibson --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 9d55c63db09b..831d963451d8 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1245,6 +1245,7 @@ struct kvm_device_ops { int (*has_attr)(struct kvm_device *dev, struct kvm_device_attr *attr); long (*ioctl)(struct kvm_device *dev, unsigned int ioctl, unsigned long arg); + int (*mmap)(struct kvm_device *dev, struct vm_area_struct *vma); }; void kvm_device_get(struct kvm_device *dev); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 55fe8e20d8fd..ea2018ae1cd7 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2884,6 +2884,16 @@ static long kvm_vcpu_compat_ioctl(struct file *filp, } #endif +static int kvm_device_mmap(struct file *filp, struct vm_area_struct *vma) +{ + struct kvm_device *dev = filp->private_data; + + if (dev->ops->mmap) + return dev->ops->mmap(dev, vma); + + return -ENODEV; +} + static int kvm_device_ioctl_attr(struct kvm_device *dev, int (*accessor)(struct kvm_device *dev, struct kvm_device_attr *attr), @@ -2936,6 +2946,7 @@ static const struct file_operations kvm_device_fops = { .unlocked_ioctl = kvm_device_ioctl, .release = kvm_device_release, KVM_COMPAT(kvm_device_ioctl), + .mmap = kvm_device_mmap, }; struct kvm_device *kvm_device_from_filp(struct file *filp)