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 9ABF9C433F5 for ; Mon, 21 Feb 2022 19:22:29 +0000 (UTC) Received: from localhost ([::1]:54220 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nMEGS-0007Kn-D0 for qemu-devel@archiver.kernel.org; Mon, 21 Feb 2022 14:22:28 -0500 Received: from eggs.gnu.org ([209.51.188.92]:56424) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nME9Z-0003U5-FL for qemu-devel@nongnu.org; Mon, 21 Feb 2022 14:15:22 -0500 Received: from [2a00:1450:4864:20::330] (port=34510 helo=mail-wm1-x330.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nME9X-0001eH-Hy for qemu-devel@nongnu.org; Mon, 21 Feb 2022 14:15:21 -0500 Received: by mail-wm1-x330.google.com with SMTP id l2-20020a7bc342000000b0037fa585de26so119903wmj.1 for ; Mon, 21 Feb 2022 11:15:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=q+4euos2X2sE9Kn//yFjNOTsm9gej+U7wgc1A9eCeFA=; b=GW1oUqII+7uf45rFXqcY4maiFLVOj0/xw41RZ/KJjMM7SHJbl/G5LXw3CqIkVEzkVp AzA9J1ONeMLML8G7lll+EAwxudIfjceWdA3SUL2R5nzSai4QfdXTn1eJMFbp+EnUn4NJ HAdI327T7TBufFYUtb5Ahn0Ku2GtGqVej1iEmvx+mRgOO/++pa5JGgpuL5/UUS6WfzBN 1qMI2AUJm2FZvFxDkBZMCn/m+2z6KEpsZnvd9VZOObicCkjzwCeiAKWl0+UlEmbv5JFv ysRQq3nKBUwUgf4KQendB1BVN/eTaPLi5OQiOsGwxlu3w5o/bFvgDxW9PSUlAWzCV+jW lwWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=q+4euos2X2sE9Kn//yFjNOTsm9gej+U7wgc1A9eCeFA=; b=hdUsruBXsHvo3zVyvES+XjakCq7kLzQuIEC5fE0YLo25k9o3NDjGo9XK8bTs8xN2dU U9qGh1K/+YR2URChvBC3B56DBHh8huCUPDGAGxKnWDz6ySE/jwnCTEcYgcXyK0x67xYi i1tTxQsljCI3T0Op5RQE7a7IbWtAibuw+eRo6Lw3/m+OLZLzYw42QU0x+72hWHa7A46Y GXGFn8SNW5AaRIBNHBaFwiNyLqGdsW+FqAgzLJCI13clPTp7CYHw/l7aF0rrZf83AZbT f3GEPsrAmRWKLd28XIxmpwc0RYTb+HR+np93NAh69NrpY4dfT9KlEj6huhTN5ZpxwxnY 53EQ== X-Gm-Message-State: AOAM5318HiGajFjMLWX07A/XG6l+f+kQF0dkZJn0dIJqxaKmmxCXkSxD 2EU4jgLfC2RNg3v/Ht5UFe0uCe8HptxaAw== X-Google-Smtp-Source: ABdhPJxzvRjcUCxe9dHf+FiGL12NlP+HYdRLR8vYd3TmRC6v5jMui6K06RMwVOOKPe6BaC0LpZsjIw== X-Received: by 2002:a05:600c:3486:b0:37c:d45c:179f with SMTP id a6-20020a05600c348600b0037cd45c179fmr382301wmq.6.1645470917746; Mon, 21 Feb 2022 11:15:17 -0800 (PST) Received: from liavpc.localdomain ([2a10:800a:bb8:1:6510:42ac:bb55:9590]) by smtp.gmail.com with ESMTPSA id b7sm40563258wrp.23.2022.02.21.11.15.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Feb 2022 11:15:17 -0800 (PST) From: Liav Albani To: qemu-devel@nongnu.org Subject: [PATCH v2 1/2] hw/isa: add function to check for existence of device by its type Date: Mon, 21 Feb 2022 21:13:22 +0200 Message-Id: <20220221191323.617323-2-liavalb@gmail.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220221191323.617323-1-liavalb@gmail.com> References: <20220221191323.617323-1-liavalb@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::330 (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::330; envelope-from=liavalb@gmail.com; helo=mail-wm1-x330.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 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, FREEMAIL_FROM=0.001, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: ani@anisinha.ca, imammedo@redhat.com, Liav Albani , mst@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This function enumerates all attached ISA devices in the machine, and tries to compare a given device type name to the enumerated devices. For example, this can help other code to determine if a i8042 controller exists in the machine. Signed-off-by: Liav Albani --- hw/isa/isa-bus.c | 23 +++++++++++++++++++++++ include/hw/isa/isa.h | 1 + 2 files changed, 24 insertions(+) diff --git a/hw/isa/isa-bus.c b/hw/isa/isa-bus.c index 6c31398dda..663aa36d29 100644 --- a/hw/isa/isa-bus.c +++ b/hw/isa/isa-bus.c @@ -222,6 +222,29 @@ void isa_build_aml(ISABus *bus, Aml *scope) } } +bool isa_check_device_existence(const char *typename) +{ + /* + * If there's no ISA bus, we know for sure that the checked ISA device type + * doesn't exist in the machine. + */ + if (isabus == NULL) { + return false; + } + + BusChild *kid; + ISADevice *dev; + + QTAILQ_FOREACH(kid, &isabus->parent_obj.children, sibling) { + dev = ISA_DEVICE(kid->child); + const char *object_type = object_get_typename(OBJECT(dev)); + if (object_type && strcmp(object_type, typename) == 0) { + return true; + } + } + return false; +} + static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent) { ISADevice *d = ISA_DEVICE(dev); diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h index d4417b34b6..65f0c7e28c 100644 --- a/include/hw/isa/isa.h +++ b/include/hw/isa/isa.h @@ -99,6 +99,7 @@ IsaDma *isa_get_dma(ISABus *bus, int nchan); MemoryRegion *isa_address_space(ISADevice *dev); MemoryRegion *isa_address_space_io(ISADevice *dev); ISADevice *isa_new(const char *name); +bool isa_check_device_existence(const char *typename); ISADevice *isa_try_new(const char *name); bool isa_realize_and_unref(ISADevice *dev, ISABus *bus, Error **errp); ISADevice *isa_create_simple(ISABus *bus, const char *name); -- 2.35.1