From patchwork Wed Sep 22 16:14:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Hedde X-Patchwork-Id: 1531332 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; secure) header.d=greensocs.com header.i=@greensocs.com header.a=rsa-sha256 header.s=mail header.b=J+Wmqk4a; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 ozlabs.org (Postfix) with ESMTPS id 4HF3cH219Tz9sPf for ; Thu, 23 Sep 2021 02:27:43 +1000 (AEST) Received: from localhost ([::1]:48002 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mT55w-0005A1-Tr for incoming@patchwork.ozlabs.org; Wed, 22 Sep 2021 12:27:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44770) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mT4v1-0003Id-H5; Wed, 22 Sep 2021 12:16:24 -0400 Received: from beetle.greensocs.com ([5.135.226.135]:39206) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mT4uz-0005RD-LI; Wed, 22 Sep 2021 12:16:23 -0400 Received: from crumble.bar.greensocs.com (unknown [172.17.10.6]) by beetle.greensocs.com (Postfix) with ESMTPS id 29DC821ECF; Wed, 22 Sep 2021 16:15:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=greensocs.com; s=mail; t=1632327359; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YFwTgaEumzc2XGbjK4hpWpdj4pZUzdb1skxz4Vmg8i8=; b=J+Wmqk4a8kuzHCMVCeIGgJjNaAhGIf80oYCh+/fvuoSlwd8WukKbcCqGi6wVcYUIS4uQKG /a8dur7Nk0YA6/FfoYgSVEqf/P0POAC01x1RLhg1ZUWOh0CgUNQ4C0nG1dSJsSu+dGdi1N f1rziCvvT/vfiWxVDVTEbOMcSei2Y0c= From: Damien Hedde To: qemu-devel@nongnu.org Subject: [RFC PATCH v2 12/16] add x-sysbus-mmio-map qmp command Date: Wed, 22 Sep 2021 18:14:01 +0200 Message-Id: <20210922161405.140018-13-damien.hedde@greensocs.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210922161405.140018-1-damien.hedde@greensocs.com> References: <20210922161405.140018-1-damien.hedde@greensocs.com> MIME-Version: 1.0 X-Spam: Yes Received-SPF: pass client-ip=5.135.226.135; envelope-from=damien.hedde@greensocs.com; helo=beetle.greensocs.com 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, 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: Peter Maydell , "Michael S. Tsirkin" , David Hildenbrand , Peter Xu , mirela.grujic@greensocs.com, Alistair Francis , Gerd Hoffmann , Ani Sinha , Eric Blake , Stefano Stabellini , xen-devel@lists.xenproject.org, Paul Durrant , Markus Armbruster , Anthony Perard , =?utf-8?q?Marc-Andr=C3=A9_Lurea?= =?utf-8?q?u?= , Eduardo Habkost , "Dr. David Alan Gilbert" , Eric Auger , Paolo Bonzini , qemu-riscv@nongnu.org, Damien Hedde , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , mark.burton@greensocs.com, edgari@xilinx.com, Igor Mammedov Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This command allows to map an mmio region of sysbus device onto the system memory. Its behavior mimics the sysbus_mmio_map() function apart from the automatic unmap (the C function unmaps the region if it is already mapped). For the qmp function we consider it is an error to try to map an already mapped function. If unmapping is required, it is probably better to add a sysbus-mmip-unmap function. This command is still experimental (hence the x prefix), as it is related to the sysbus device creation through qmp commands. In future, we expect to have to handle the overlap/priority parameter but also multiple mapping of one mmio. For some devices, one mmio is mapped several times at different addresses on the bus (which is not supported by sysbus_mmio_map() function and requires the use of memory region aliases). Signed-off-by: Damien Hedde Acked-by: Alistair Francis --- Note: this qmp command is required to be able to build a machine from scratch as there is no qmp-way of doing a memory mapping today. We've added the command into qapi/qdev.json section. It does not seem to have any really adequate section yet. Any idea ? should we create for example a new one: qapi/sysbus.json or qapi/memory.json ? --- qapi/qdev.json | 21 +++++++++++++++++++++ hw/core/sysbus.c | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 62 insertions(+) diff --git a/qapi/qdev.json b/qapi/qdev.json index ad669ae175..dfc1104197 100644 --- a/qapi/qdev.json +++ b/qapi/qdev.json @@ -125,3 +125,24 @@ ## { 'event': 'DEVICE_DELETED', 'data': { '*device': 'str', 'path': 'str' } } + +## +# @x-sysbus-mmio-map: +# +# Map a sysbus device mmio onto the main system bus. +# +# @device: the device's QOM path +# +# @mmio: The mmio number to be mapped (defaults to 0). +# +# @addr: The base address for the mapping. +# +# Since: 6.2 +# +# Returns: Nothing on success +# +## + +{ 'command': 'x-sysbus-mmio-map', + 'data': {'device': 'str', '*mmio': 'uint8', 'addr': 'uint64'}, + 'allow-preconfig' : true } diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c index aaae8e23cc..b0891f37b6 100644 --- a/hw/core/sysbus.c +++ b/hw/core/sysbus.c @@ -23,6 +23,7 @@ #include "hw/sysbus.h" #include "monitor/monitor.h" #include "exec/address-spaces.h" +#include "qapi/qapi-commands-qdev.h" static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent); static char *sysbus_get_fw_dev_path(DeviceState *dev); @@ -154,6 +155,46 @@ static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr, } } +void qmp_x_sysbus_mmio_map(const char *device, bool has_mmio, uint8_t mmio, + uint64_t addr, Error **errp) +{ + Object *obj = object_resolve_path_type(device, TYPE_SYS_BUS_DEVICE, NULL); + SysBusDevice *dev; + + if (phase_get() != MACHINE_INIT_PHASE_INITIALIZED) { + error_setg(errp, "The command is permitted only when " + "the machine is in initialized phase"); + return; + } + + if (obj == NULL) { + error_setg(errp, "Device '%s' not found", device); + return; + } + + dev = SYS_BUS_DEVICE(obj); + if (!has_mmio) { + mmio = 0; + } + if (mmio >= dev->num_mmio) { + error_setg(errp, "MMIO index '%u' is out of range", mmio); + return; + } + + if (dev->mmio[mmio].addr != (hwaddr)-1) { + error_setg(errp, "MMIO index '%u' is already mapped", mmio); + return; + } + + if (!memory_region_try_add_subregion(get_system_memory(), addr, + dev->mmio[mmio].memory, 0, + errp)) { + return; + } + + dev->mmio[mmio].addr = addr; +} + void sysbus_mmio_unmap(SysBusDevice *dev, int n) { assert(n >= 0 && n < dev->num_mmio);