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 X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F34B7C433E3 for ; Mon, 27 Jul 2020 12:25:11 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C1BA32074F for ; Mon, 27 Jul 2020 12:25:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="Ivz7bepB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C1BA32074F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44548 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k02Bq-0000Co-Vj for qemu-devel@archiver.kernel.org; Mon, 27 Jul 2020 08:25:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36962) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k02Ao-0006uP-UA for qemu-devel@nongnu.org; Mon, 27 Jul 2020 08:24:06 -0400 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]:40034) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1k02An-0006QD-8h for qemu-devel@nongnu.org; Mon, 27 Jul 2020 08:24:06 -0400 Received: by mail-wr1-x442.google.com with SMTP id l2so4115412wrc.7 for ; Mon, 27 Jul 2020 05:24:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4DkH+HsKr59a1msZyNsGwSRnaJGoXL2y3SWKWzOhSpU=; b=Ivz7bepBEmniKPvFEH8tB/o+eAqzW/oFlp7mg/i9blICyxhA1aNpA+DxYBbf/JF94G g8RXFZ0+oGq148PVBbjW0n8MEaLcgda8xj8ovrO+uNF25Fl8EbNoGd+zjtKHiJREwKAW bKEpeJjwniXV3d3DHWFXtaU9+2yjPOvq8iUYVVq3EYetCBjqLtni4x1P3y99/6WIgSpl gGpi6RYAp5PcoP8U/naRBC7foGjpTybY2Wj82Rdpl0q1v2M08OS2MBXPIXrxCdru+4B6 oRrPx+FT/GbgH6Ha12Wf1p2NIDxeFiz1I1yB9f6OOSnlcrku421dI9z0A2EJHWLTXkf7 wNUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4DkH+HsKr59a1msZyNsGwSRnaJGoXL2y3SWKWzOhSpU=; b=qV+JhOOehBj+V356wl4S7i7K1RQVzHitq/EyvEQBY84/0H0Ydzh+OUY3YuokvMI48D EWOpQikQ3PVAt6HlhxWDhdfrt4m8ou2ph3cK8I+zZNh7P3HhrNAV99W0woQ6OgRPbmpA 13NXtZjCsx+b/LxmC6mcORKH0U6do03iNyIRcNswdX5ldKpSBjHqQpuALeyPJM1kKuRD tBHxBP1I7K1K904oL2VJFVghuyjmJHpaTjfOLgqduW+kTx8iQ23HNlXtF0BH3w76De9P nKpC4v1QzDli2tpxpcvLkFyxDdZz4COuEKaB56PvkLvRWlUyMfw4j6lOiRvkMfECee07 KubQ== X-Gm-Message-State: AOAM532YJf46Q7byhBDp7zzo9sq3za+cyAB0DvBTpJo1j0YltkzFdUEC RMxqNfMyMFZQ7aQGx+y8Hub9mQ== X-Google-Smtp-Source: ABdhPJykbFGse0w4a1U7AyiEGiSv5IcVBq0AKQLXLP1rPFj2U/2VXOatAlmpT6QBWO4qbG9LJ2kjmQ== X-Received: by 2002:adf:83c5:: with SMTP id 63mr19833097wre.321.1595852643909; Mon, 27 Jul 2020 05:24:03 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id z11sm12067528wrw.93.2020.07.27.05.23.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jul 2020 05:24:00 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id BC7A21FF90; Mon, 27 Jul 2020 13:23:57 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: peter.maydell@linaro.org Subject: [PULL 04/16] util: add qemu_get_host_physmem utility function Date: Mon, 27 Jul 2020 13:23:45 +0100 Message-Id: <20200727122357.31263-5-alex.bennee@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200727122357.31263-1-alex.bennee@linaro.org> References: <20200727122357.31263-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::442; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x442.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stefan Weil , Richard Henderson , qemu-devel@nongnu.org, Christian Ehrhardt , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This will be used in a future patch. For POSIX systems _SC_PHYS_PAGES isn't standardised but at least appears in the man pages for Open/FreeBSD. The result is advisory so any users of it shouldn't just fail if we can't work it out. The win32 stub currently returns 0 until someone with a Windows system can develop and test a patch. Signed-off-by: Alex Bennée Reviewed-by: Richard Henderson Cc: BALATON Zoltan Cc: Christian Ehrhardt Message-Id: <20200724064509.331-5-alex.bennee@linaro.org> diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index 45c217aa280..0b1298b3c91 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -668,4 +668,16 @@ static inline void qemu_reset_optind(void) */ char *qemu_get_host_name(Error **errp); +/** + * qemu_get_host_physmem: + * + * Operating system agnostic way of querying host memory. + * + * Returns amount of physical memory on the system. This is purely + * advisery and may return 0 if we can't work it out. At the other + * end we saturate to SIZE_MAX if you are lucky enough to have that + * much memory. + */ +size_t qemu_get_host_physmem(void); + #endif diff --git a/util/oslib-posix.c b/util/oslib-posix.c index d9236746248..ad8001a4ad8 100644 --- a/util/oslib-posix.c +++ b/util/oslib-posix.c @@ -841,3 +841,18 @@ char *qemu_get_host_name(Error **errp) return g_steal_pointer(&hostname); } + +size_t qemu_get_host_physmem(void) +{ +#ifdef _SC_PHYS_PAGES + long pages = sysconf(_SC_PHYS_PAGES); + if (pages > 0) { + if (pages > SIZE_MAX / qemu_real_host_page_size) { + return SIZE_MAX; + } else { + return pages * qemu_real_host_page_size; + } + } +#endif + return 0; +} diff --git a/util/oslib-win32.c b/util/oslib-win32.c index 7eedbe5859a..31030463cc9 100644 --- a/util/oslib-win32.c +++ b/util/oslib-win32.c @@ -828,3 +828,9 @@ char *qemu_get_host_name(Error **errp) return g_utf16_to_utf8(tmp, size, NULL, NULL, NULL); } + +size_t qemu_get_host_physmem(void) +{ + /* currently unimplemented */ + return 0; +} -- 2.20.1