From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9A242C4167B for ; Fri, 30 Dec 2022 12:13:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pBEFq-0007hg-Rm; Fri, 30 Dec 2022 07:12:55 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pBEFn-0007fm-Kn for qemu-devel@nongnu.org; Fri, 30 Dec 2022 07:12:51 -0500 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pBEFk-0004y3-Pv for qemu-devel@nongnu.org; Fri, 30 Dec 2022 07:12:51 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description; bh=CU6bNlXAGMVBHHBYlSkMSoQ0V1D0YRZ47abxZMOb1K4=; b=UYVUqZD25DPu8kMIof3BitmQVq ff95BD5kqV9A1NoSoY2uaeKrvqwsDs2WG7J0ikWYvdcTFV5zeV5d+hy1QT8XHldTvRuSHVbjGyLZ6 kMh0SObIgZu2jI6lUu6mul2NvNvdAmH2cmH/TTSB2/wWoYbXwR9+QSDujPJ42BO/zjV/2wlsrvSdV ccWJPBYQPmHkZYO+dHxvjhHoRHrgU+30KUnDBAj27TKw+9k3u8x0Pi6HbihW9AcThxmnVZCQxro5a naO3yG0ZbI9DlOUkXjQZGkI5UJaehCG4U2/AG68uBCwsm4aNCqTZdxb4GaEKh7Mds7BPohVCP1fJ8 mp/Q8kyw==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pBEFl-00Ac8c-K8; Fri, 30 Dec 2022 12:12:49 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pBEFa-005NzY-CR; Fri, 30 Dec 2022 12:12:38 +0000 From: David Woodhouse To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Thomas Huth , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana , Julien Grall Subject: [RFC PATCH v5 43/52] hw/xen: Add xen_gnttab device for grant table emulation Date: Fri, 30 Dec 2022 12:12:26 +0000 Message-Id: <20221230121235.1282915-44-dwmw2@infradead.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20221230121235.1282915-1-dwmw2@infradead.org> References: <20221230121235.1282915-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1236::1; envelope-from=BATV+1132f1bfe572585e6c7f+7068+infradead.org+dwmw2@casper.srs.infradead.org; helo=casper.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: David Woodhouse Signed-off-by: David Woodhouse --- hw/i386/kvm/meson.build | 1 + hw/i386/kvm/xen_gnttab.c | 110 ++++++++++++++++++++++++++++++++++++++ hw/i386/kvm/xen_gnttab.h | 18 +++++++ hw/i386/pc.c | 2 + target/i386/kvm/xen-emu.c | 3 ++ 5 files changed, 134 insertions(+) create mode 100644 hw/i386/kvm/xen_gnttab.c create mode 100644 hw/i386/kvm/xen_gnttab.h diff --git a/hw/i386/kvm/meson.build b/hw/i386/kvm/meson.build index cab64df339..e02449e4d4 100644 --- a/hw/i386/kvm/meson.build +++ b/hw/i386/kvm/meson.build @@ -7,6 +7,7 @@ i386_kvm_ss.add(when: 'CONFIG_IOAPIC', if_true: files('ioapic.c')) i386_kvm_ss.add(when: 'CONFIG_XEN_EMU', if_true: files( 'xen_overlay.c', 'xen_evtchn.c', + 'xen_gnttab.c', )) i386_ss.add_all(when: 'CONFIG_KVM', if_true: i386_kvm_ss) diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c new file mode 100644 index 0000000000..7a441445cd --- /dev/null +++ b/hw/i386/kvm/xen_gnttab.c @@ -0,0 +1,110 @@ +/* + * QEMU Xen emulation: Grant table support + * + * Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Authors: David Woodhouse + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/host-utils.h" +#include "qemu/module.h" +#include "qemu/main-loop.h" +#include "qapi/error.h" +#include "qom/object.h" +#include "exec/target_page.h" +#include "exec/address-spaces.h" +#include "migration/vmstate.h" + +#include "hw/sysbus.h" +#include "hw/xen/xen.h" +#include "xen_overlay.h" +#include "xen_gnttab.h" + +#include "sysemu/kvm.h" +#include "sysemu/kvm_xen.h" + +#include "standard-headers/xen/memory.h" +#include "standard-headers/xen/grant_table.h" + +#define TYPE_XEN_GNTTAB "xen-gnttab" +OBJECT_DECLARE_SIMPLE_TYPE(XenGnttabState, XEN_GNTTAB) + +#define XEN_PAGE_SHIFT 12 +#define XEN_PAGE_SIZE (1ULL << XEN_PAGE_SHIFT) + +struct XenGnttabState { + /*< private >*/ + SysBusDevice busdev; + /*< public >*/ + + uint32_t nr_frames; + uint32_t max_frames; +}; + +struct XenGnttabState *xen_gnttab_singleton; + +static void xen_gnttab_realize(DeviceState *dev, Error **errp) +{ + XenGnttabState *s = XEN_GNTTAB(dev); + + if (xen_mode != XEN_EMULATE) { + error_setg(errp, "Xen grant table support is for Xen emulation"); + return; + } + s->nr_frames = 0; + s->max_frames = kvm_xen_get_gnttab_max_frames(); +} + +static bool xen_gnttab_is_needed(void *opaque) +{ + return xen_mode == XEN_EMULATE; +} + +static const VMStateDescription xen_gnttab_vmstate = { + .name = "xen_gnttab", + .version_id = 1, + .minimum_version_id = 1, + .needed = xen_gnttab_is_needed, + .fields = (VMStateField[]) { + VMSTATE_UINT32(nr_frames, XenGnttabState), + VMSTATE_END_OF_LIST() + } +}; + +static void xen_gnttab_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = xen_gnttab_realize; + dc->vmsd = &xen_gnttab_vmstate; +} + +static const TypeInfo xen_gnttab_info = { + .name = TYPE_XEN_GNTTAB, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(XenGnttabState), + .class_init = xen_gnttab_class_init, +}; + +void xen_gnttab_create(void) +{ + xen_gnttab_singleton = XEN_GNTTAB(sysbus_create_simple(TYPE_XEN_GNTTAB, + -1, NULL)); +} + +static void xen_gnttab_register_types(void) +{ + type_register_static(&xen_gnttab_info); +} + +type_init(xen_gnttab_register_types) + +int xen_gnttab_map_page(uint64_t idx, uint64_t gfn) +{ + return -ENOSYS; +} + diff --git a/hw/i386/kvm/xen_gnttab.h b/hw/i386/kvm/xen_gnttab.h new file mode 100644 index 0000000000..a7caa94c83 --- /dev/null +++ b/hw/i386/kvm/xen_gnttab.h @@ -0,0 +1,18 @@ +/* + * QEMU Xen emulation: Grant table support + * + * Copyright © 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved. + * + * Authors: David Woodhouse + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef QEMU_XEN_GNTTAB_H +#define QEMU_XEN_GNTTAB_H + +void xen_gnttab_create(void); +int xen_gnttab_map_page(uint64_t idx, uint64_t gfn); + +#endif /* QEMU_XEN_GNTTAB_H */ diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 1c4941de8f..4f044bc7da 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -91,6 +91,7 @@ #include "hw/virtio/virtio-mem-pci.h" #include "hw/i386/kvm/xen_overlay.h" #include "hw/i386/kvm/xen_evtchn.h" +#include "hw/i386/kvm/xen_gnttab.h" #include "hw/mem/memory-device.h" #include "sysemu/replay.h" #include "target/i386/cpu.h" @@ -1856,6 +1857,7 @@ int pc_machine_kvm_type(MachineState *machine, const char *kvm_type) if (xen_mode == XEN_EMULATE) { xen_overlay_create(); xen_evtchn_create(); + xen_gnttab_create(); } #endif return 0; diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index fd3e2464ee..931e74670b 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -26,6 +26,7 @@ #include "hw/i386/apic-msidef.h" #include "hw/i386/kvm/xen_overlay.h" #include "hw/i386/kvm/xen_evtchn.h" +#include "hw/i386/kvm/xen_gnttab.h" #include "standard-headers/xen/version.h" #include "standard-headers/xen/sched.h" @@ -502,6 +503,8 @@ static int add_to_physmap_one(uint32_t space, uint64_t idx, uint64_t gfn) return xen_set_shared_info(gfn); case XENMAPSPACE_grant_table: + return xen_gnttab_map_page(idx, gfn); + case XENMAPSPACE_gmfn: case XENMAPSPACE_gmfn_range: return -ENOTSUP; -- 2.35.3