From patchwork Thu Apr 11 15:24:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Barnes X-Patchwork-Id: 13626152 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 A9D1FC4345F for ; Thu, 11 Apr 2024 15:25:08 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.703991.1100052 (Exim 4.92) (envelope-from ) id 1ruwIP-0000gC-NG; Thu, 11 Apr 2024 15:25:01 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 703991.1100052; Thu, 11 Apr 2024 15:25:01 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ruwIP-0000g3-KL; Thu, 11 Apr 2024 15:25:01 +0000 Received: by outflank-mailman (input) for mailman id 703991; Thu, 11 Apr 2024 15:24:59 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1ruwIN-0000Mi-SN for xen-devel@lists.xenproject.org; Thu, 11 Apr 2024 15:24:59 +0000 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [2a00:1450:4864:20::336]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id a8a462ce-f817-11ee-b908-491648fe20b8; Thu, 11 Apr 2024 17:24:59 +0200 (CEST) Received: by mail-wm1-x336.google.com with SMTP id 5b1f17b1804b1-417d14c3426so6478195e9.3 for ; Thu, 11 Apr 2024 08:24:59 -0700 (PDT) Received: from EMEAENGAAD91498.citrite.net ([2.223.45.79]) by smtp.gmail.com with ESMTPSA id jg25-20020a05600ca01900b004169836bf9asm5719725wmb.23.2024.04.11.08.24.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Apr 2024 08:24:58 -0700 (PDT) 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 Sender: "Xen-devel" X-Inumbo-ID: a8a462ce-f817-11ee-b908-491648fe20b8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloud.com; s=cloud; t=1712849098; x=1713453898; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=OjuqnmWYV0nc4dRzJON3TQC6x9O1cypmz7qzf7KldJU=; b=J8e9dd9Qs/jrEfzG3dmy+ej+y6Us7J60Z6w3HCZreJOMKuedN01mB44Pj1xHGxOj7Z EvHEAnGP7ZEWoiLcXgVvqcbjMYzkkoJK7x//rYVoC7pM2ytfWFWcXlyH9Evhs+IjuPS3 mo7XX0lsUQ1cRsU4Rxh/D2s8YIWLabUy2Gfzs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712849098; x=1713453898; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=OjuqnmWYV0nc4dRzJON3TQC6x9O1cypmz7qzf7KldJU=; b=xDAqtBEzyo9LGQbbrZAFFDednyLIeqQyNlEI/QfJAkJXz6UEO4PK8+iX8mSE2lC2dl uqvtHYl4a08alEwRya4IUhjB0E3sLU8799Y14FyyO5Gij7HLCerrq4dkFcERKNumFt7Y 4mYnXE6LDZOB1WGHR/qgYP8qawCES15dOiBgCqjSGKHq86ICdOXew3WhLJgAPiNYfkJo YD7CWU/Y2Mz1Art8A7lySOpg0m9kHI3PLewoyi0f8t0jku6SRkSv06VWIGRAnOu2tCQR W6LcOYVZbvhyvX40jGyuckzuDtKir2rlRhXzuHsZXJjqKZVK6fxSDp1ZAqblLOJ835qd 3aTA== X-Gm-Message-State: AOJu0YzT9OuRtrnlJFhsZj4aJRLTDjMlo1/cK+wyJVENaAgOAOsiqOpw xtQ1lSwRumi7YnXc4y1phQGEQaxmPjMBXwX3MDG6yEAifyi8EjEhG20P/4kA+/9pZDX6AwHjtYJ c X-Google-Smtp-Source: AGHT+IF8OOPAtok9GOT+TbeQfHXvMOoeh4PkWlDFuo7e+puuSsXRp7cXKM8ugkRAh/8/otE2eE1sYw== X-Received: by 2002:a05:600c:a10:b0:416:731e:4a26 with SMTP id z16-20020a05600c0a1000b00416731e4a26mr84206wmp.38.1712849098668; Thu, 11 Apr 2024 08:24:58 -0700 (PDT) From: Matthew Barnes To: Xen-devel Cc: Matthew Barnes , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini Subject: [XEN PATCH 1/2] xen/domctl: Add highest allocated evtchn port to getdomaininfo Date: Thu, 11 Apr 2024 16:24:10 +0100 Message-Id: <55a9cc8fa53e57f898d05463746cbabda821ce25.1712840924.git.matthew.barnes@cloud.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 For tools such as lsevtchn to enumerate through event channels, they need an upper bound on the port number. Add the highest allocated event channel port number for a domain in the xen_domctl_getdomaininfo struct, and populate it. The field is added above the padding to avoid implicit padding. Signed-off-by: Matthew Barnes --- xen/common/domctl.c | 1 + xen/include/public/domctl.h | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/xen/common/domctl.c b/xen/common/domctl.c index 43b0b074c3a6..1d1ee17f6f91 100644 --- a/xen/common/domctl.c +++ b/xen/common/domctl.c @@ -73,6 +73,7 @@ void getdomaininfo(struct domain *d, struct xen_domctl_getdomaininfo *info) info->domain = d->domain_id; info->max_vcpu_id = XEN_INVALID_MAX_VCPU_ID; + info->highest_evtchn_port = read_atomic(&d->valid_evtchns); /* * - domain is marked as blocked only if all its vcpus are blocked diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h index a33f9ec32b08..d28d29180c75 100644 --- a/xen/include/public/domctl.h +++ b/xen/include/public/domctl.h @@ -145,7 +145,8 @@ struct xen_domctl_getdomaininfo { xen_domain_handle_t handle; uint32_t cpupool; uint8_t gpaddr_bits; /* Guest physical address space size. */ - uint8_t pad2[7]; + uint8_t pad2[3]; + evtchn_port_t highest_evtchn_port; /* Highest allocated event channel port. Used for enumeration */ struct xen_arch_domainconfig arch_config; }; typedef struct xen_domctl_getdomaininfo xen_domctl_getdomaininfo_t;