From patchwork Wed Oct 25 14:50:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Woodhouse X-Patchwork-Id: 13436325 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 150ECC27C47 for ; Wed, 25 Oct 2023 14:51:29 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.622969.970341 (Exim 4.92) (envelope-from ) id 1qvfDy-0002Di-0H; Wed, 25 Oct 2023 14:51:10 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 622969.970341; Wed, 25 Oct 2023 14:51:09 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qvfDx-0002D1-L6; Wed, 25 Oct 2023 14:51:09 +0000 Received: by outflank-mailman (input) for mailman id 622969; Wed, 25 Oct 2023 14:51:07 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qvfDv-0000WU-O9 for xen-devel@lists.xenproject.org; Wed, 25 Oct 2023 14:51:07 +0000 Received: from casper.infradead.org (casper.infradead.org [2001:8b0:10b:1236::1]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id e9ffea17-7345-11ee-9b0e-b553b5be7939; Wed, 25 Oct 2023 16:51:01 +0200 (CEST) Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1qvfDY-009Nmg-TY; Wed, 25 Oct 2023 14:50:44 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.96 #2 (Red Hat Linux)) id 1qvfDY-002dEi-1t; Wed, 25 Oct 2023 15:50:44 +0100 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list X-Inumbo-ID: e9ffea17-7345-11ee-9b0e-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=xu550fyiR7pDFVRdWcAZ9rrT91tg3y6fvozQk3tPZhU=; b=mlDgNH9hrQ2uE5gT+pnk2qg3lB qeAUB1XoT8ifIgUe4nUkauPhzIfs5A/8pqA09jexOsMulJiWz9XN7NTmXUaR9/gw+nMrrUxGaEvVr nWJgwc3ezPFTIb1LX688b92xQo9Mpr7EuZaLB86JnW6S8QrDcc8NwM4hgFF3FDRmKFwAY6v2L4zwU LpkpNnHWNFm3CamvDfJd2lDno0Pftld+dLsqy7kvDtaZJDdUmVse2jRMi0cS7mcebsabEBeswREcE ECwqTqNsIX6MhHB97zfdvsPq3WQYEbPK8NKGlSxiFggsAZ1HCyKiLwm2UT5jZVxcfDIECKYndudBF K6XpcfzQ==; From: David Woodhouse To: qemu-devel@nongnu.org Cc: Kevin Wolf , Hanna Reitz , Stefano Stabellini , Anthony Perard , Paul Durrant , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Paolo Bonzini , "Michael S. Tsirkin" , Marcel Apfelbaum , Richard Henderson , Eduardo Habkost , Jason Wang , Marcelo Tosatti , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Bernhard Beschow , Joel Upham Subject: [PATCH v3 12/28] hw/xen: populate store frontend nodes with XenStore PFN/port Date: Wed, 25 Oct 2023 15:50:26 +0100 Message-Id: <20231025145042.627381-13-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231025145042.627381-1-dwmw2@infradead.org> References: <20231025145042.627381-1-dwmw2@infradead.org> MIME-Version: 1.0 Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html From: David Woodhouse This is kind of redundant since without being able to get these through some other method (HVMOP_get_param) the guest wouldn't be able to access XenStore in order to find them. Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant --- hw/i386/kvm/xen_xenstore.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/hw/i386/kvm/xen_xenstore.c b/hw/i386/kvm/xen_xenstore.c index 831da535fc..b7c0407765 100644 --- a/hw/i386/kvm/xen_xenstore.c +++ b/hw/i386/kvm/xen_xenstore.c @@ -1434,6 +1434,7 @@ static void alloc_guest_port(XenXenstoreState *s) int xen_xenstore_reset(void) { XenXenstoreState *s = xen_xenstore_singleton; + GList *perms; int err; if (!s) { @@ -1461,6 +1462,16 @@ int xen_xenstore_reset(void) } s->be_port = err; + /* Create frontend store nodes */ + perms = g_list_append(NULL, xs_perm_as_string(XS_PERM_NONE, DOMID_QEMU)); + perms = g_list_append(perms, xs_perm_as_string(XS_PERM_READ, xen_domid)); + + relpath_printf(s, perms, "store/port", "%u", s->guest_port); + relpath_printf(s, perms, "store/ring-ref", "%lu", + XEN_SPECIAL_PFN(XENSTORE)); + + g_list_free_full(perms, g_free); + /* * We don't actually access the guest's page through the grant, because * this isn't real Xen, and we can just use the page we gave it in the