From patchwork Sat Jan 28 08:11:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13119748 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 74488C38142 for ; Sat, 28 Jan 2023 08:13:17 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pLgJQ-0005tS-OK; Sat, 28 Jan 2023 03:11:49 -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 1pLgJN-0005sJ-Gq for qemu-devel@nongnu.org; Sat, 28 Jan 2023 03:11:45 -0500 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pLgJK-0007rP-3K for qemu-devel@nongnu.org; Sat, 28 Jan 2023 03:11:45 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=J6B9TGsfOoT09wMysUdb5rQDuL/HRZwVHrupDT8ZPvk=; b=DO4KWrpvZ79f4LPDSaj7Ip4rdE kUdnFWPDYie4/+i+HFCcNfeHbvh1zRorxLPyQANSluNnoQKVtnc0JPpvEe6AoFBgI/kjCsTd4fgDT GKFmjVSJr4HibLPVHQjyGLE2AWH0MfPet9FsppPtIigZlHzfC9+OS7Rdcz4DgfDUpKWMsIpJ404OK E+xrbpGJ3y9OSv3c1M8QzA0JipSRhkxOabGSP4fRxYakAMnsLZdgdKQinclH83KE78ZHGxS3wNJ5i 4GwE5XVnd6zP+W3zQJ+HvRkVqlANNx1Hy59gLXRQgDFLOHO/237UnLt6sDR+j390MulB6GbdwKNRP b/DYXYPQ==; Received: from i7.infradead.org ([2001:8b0:10b:1:21e:67ff:fecb:7a92]) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pLgIS-0039we-1B; Sat, 28 Jan 2023 08:10:57 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1pLgIy-006mKo-19; Sat, 28 Jan 2023 08:11:20 +0000 From: David Woodhouse To: Peter Maydell , qemu-devel@nongnu.org Cc: Paolo Bonzini , Paul Durrant , Joao Martins , Ankur Arora , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Thomas Huth , =?utf-8?q?Alex_Benn=C3=A9e?= , Juan Quintela , "Dr . David Alan Gilbert" , Claudio Fontana , Julien Grall , "Michael S. Tsirkin" , Marcel Apfelbaum , armbru@redhat.com Subject: [PATCH v9 45/58] hw/xen: Implement GNTTABOP_query_size Date: Sat, 28 Jan 2023 08:11:00 +0000 Message-Id: <20230128081113.1615111-46-dwmw2@infradead.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230128081113.1615111-1-dwmw2@infradead.org> References: <20230128081113.1615111-1-dwmw2@infradead.org> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; envelope-from=BATV+e8fc867402dd322853dc+7097+infradead.org+dwmw2@desiato.srs.infradead.org; helo=desiato.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/xen_gnttab.c | 19 +++++++++++++++++++ hw/i386/kvm/xen_gnttab.h | 2 ++ target/i386/kvm/xen-emu.c | 16 +++++++++++++++- 3 files changed, 36 insertions(+), 1 deletion(-) diff --git a/hw/i386/kvm/xen_gnttab.c b/hw/i386/kvm/xen_gnttab.c index b3f567f014..3eb5478fa0 100644 --- a/hw/i386/kvm/xen_gnttab.c +++ b/hw/i386/kvm/xen_gnttab.c @@ -212,3 +212,22 @@ int xen_gnttab_get_version_op(struct gnttab_get_version *get) get->version = 1; return 0; } + +int xen_gnttab_query_size_op(struct gnttab_query_size *size) +{ + XenGnttabState *s = xen_gnttab_singleton; + + if (!s) { + return -ENOTSUP; + } + + if (size->dom != DOMID_SELF && size->dom != xen_domid) { + size->status = GNTST_bad_domain; + return 0; + } + + size->status = GNTST_okay; + size->nr_frames = s->nr_frames; + size->max_nr_frames = s->max_frames; + return 0; +} diff --git a/hw/i386/kvm/xen_gnttab.h b/hw/i386/kvm/xen_gnttab.h index 79579677ba..3bdbe96191 100644 --- a/hw/i386/kvm/xen_gnttab.h +++ b/hw/i386/kvm/xen_gnttab.h @@ -17,7 +17,9 @@ int xen_gnttab_map_page(uint64_t idx, uint64_t gfn); struct gnttab_set_version; struct gnttab_get_version; +struct gnttab_query_size; int xen_gnttab_set_version_op(struct gnttab_set_version *set); int xen_gnttab_get_version_op(struct gnttab_get_version *get); +int xen_gnttab_query_size_op(struct gnttab_query_size *size); #endif /* QEMU_XEN_GNTTAB_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index 17a51b307c..6434510ad6 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -1204,7 +1204,21 @@ static bool kvm_xen_hcall_gnttab_op(struct kvm_xen_exit *exit, X86CPU *cpu, } break; } - case GNTTABOP_query_size: + case GNTTABOP_query_size: { + struct gnttab_query_size size; + + qemu_build_assert(sizeof(size) == 16); + if (kvm_copy_from_gva(cs, arg, &size, sizeof(size))) { + err = -EFAULT; + break; + } + + err = xen_gnttab_query_size_op(&size); + if (!err && kvm_copy_to_gva(cs, arg, &size, sizeof(size))) { + err = -EFAULT; + } + break; + } case GNTTABOP_setup_table: case GNTTABOP_copy: case GNTTABOP_map_grant_ref: