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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 135BDC433F5 for ; Fri, 1 Oct 2021 17:54:51 +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 A7CD661ABB for ; Fri, 1 Oct 2021 17:54:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A7CD661ABB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:41446 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mWMkD-0001E7-Rs for qemu-devel@archiver.kernel.org; Fri, 01 Oct 2021 13:54:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60612) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mWMUC-0000TM-71 for qemu-devel@nongnu.org; Fri, 01 Oct 2021 13:38:17 -0400 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]:50824) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mWMU9-0000e0-7b for qemu-devel@nongnu.org; Fri, 01 Oct 2021 13:38:15 -0400 Received: by mail-wm1-x32a.google.com with SMTP id j27so7797383wms.0 for ; Fri, 01 Oct 2021 10:38:12 -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=PXZfK7Oh9ka7EzsTMcy7G7qzk9dy5gzr+jsgpmOW2zQ=; b=Z0GssepqB+TcpKw9wrQAcQfElGS+NHmSdLqdSJA24wwWq/jnYCbxj3N6EdY1cmO2n8 BehvRFxjGbEdM52Agj7gvzobP5iIJoBA5N5Z7i4hNli30v3LvE5ZjotC2PTFp2p3mXgZ k3/3GQ6uDWkIE6Emj326/JOnQzxFfx5SF1MB9AjPwAHnkcZOLww5egdiNok0fMSTbQJA j7HXLoXI1wQJsPYZoNsKWmtmPDOJGOWjXwK9ZdHh79LYE+pncTJ+jqsqToeFt9a3gPiH X65mFuEZDzrNcJ7nFoqb8MuW3LNayefio2wQcjCVRbqydKbVY1QIeqDTJ4hIr2AHGktX tezw== 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=PXZfK7Oh9ka7EzsTMcy7G7qzk9dy5gzr+jsgpmOW2zQ=; b=Oot8yS8ugpG81aRL59sdiWEgU34b7u6BRk0bJJuLvgzM7CvovQKr3gZXcFz+x5vJ+F iA/lDPTgem3e/Wdl6q+qIKIEQQiXQxhxZ84uxHflMeAknXAA8qFEKZMQ67bCFUasnPN0 HiLrh3TR1sXgQ4Qqnfd7EFSc2oonI7gNCdPvP7I3DurRSE/icnknpSXEx8Nzq8FFG7AT 47e2KYBNQWrDXPfXzxXg4m+6B7A5zr+qE6Z3VmkDvNPNN+igwomg2rctKlmQkDyB/n+u w1JC2d2HxpYGshHPxSbakQjIsgXqMHMlHlkJcxuJGQggQ+CQQuKyli3FPXGX34zFOlmh BYGQ== X-Gm-Message-State: AOAM533/CsJWv48FJXVY4kzFRUXnchnY1oJ2PlUDNWiEusFhCPsFA9hO 2naXUzzZejVI31ZQz7IEr2GxlQ== X-Google-Smtp-Source: ABdhPJz5ryOk7uiBIdXl2Y2dcXgYIbEQccevWYnRjvfrdYFgr4LWZ7Y8V8hVHQ9Vep7vk1+6su0Wew== X-Received: by 2002:a05:600c:a45:: with SMTP id c5mr5913096wmq.79.1633109891785; Fri, 01 Oct 2021 10:38:11 -0700 (PDT) Received: from localhost.localdomain (cpc92880-cmbg19-2-0-cust679.5-4.cable.virginm.net. [82.27.106.168]) by smtp.gmail.com with ESMTPSA id k9sm6186592wrz.22.2021.10.01.10.38.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Oct 2021 10:38:11 -0700 (PDT) From: Jean-Philippe Brucker To: eric.auger@redhat.com, imammedo@redhat.com Subject: [PATCH v4 01/11] hw/acpi: Add VIOT table Date: Fri, 1 Oct 2021 18:33:49 +0100 Message-Id: <20211001173358.863017-2-jean-philippe@linaro.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211001173358.863017-1-jean-philippe@linaro.org> References: <20211001173358.863017-1-jean-philippe@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=jean-philippe@linaro.org; helo=mail-wm1-x32a.google.com X-Spam_score_int: -1 X-Spam_score: -0.2 X-Spam_bar: / X-Spam_report: (-0.2 / 5.0 requ) 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: peter.maydell@linaro.org, ehabkost@redhat.com, mst@redhat.com, richard.henderson@linaro.org, qemu-devel@nongnu.org, shannon.zhaosl@gmail.com, Jean-Philippe Brucker , qemu-arm@nongnu.org, ani@anisinha.ca, pbonzini@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add a function that generates a Virtual I/O Translation table (VIOT), describing the topology of paravirtual IOMMUs. The table is created when instantiating a virtio-iommu device. It contains a virtio-iommu node and PCI Range nodes for endpoints managed by the IOMMU. By default, a single node describes all PCI devices. When passing the "default_bus_bypass_iommu" machine option and "bypass_iommu" PXB option, only buses that do not bypass the IOMMU are described by PCI Range nodes. Reviewed-by: Eric Auger Tested-by: Eric Auger Signed-off-by: Jean-Philippe Brucker --- hw/acpi/viot.h | 13 +++++ hw/acpi/viot.c | 112 ++++++++++++++++++++++++++++++++++++++++++++ hw/acpi/Kconfig | 4 ++ hw/acpi/meson.build | 1 + 4 files changed, 130 insertions(+) create mode 100644 hw/acpi/viot.h create mode 100644 hw/acpi/viot.c diff --git a/hw/acpi/viot.h b/hw/acpi/viot.h new file mode 100644 index 0000000000..9fe565bb87 --- /dev/null +++ b/hw/acpi/viot.h @@ -0,0 +1,13 @@ +/* + * ACPI Virtual I/O Translation Table implementation + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#ifndef VIOT_H +#define VIOT_H + +void build_viot(MachineState *ms, GArray *table_data, BIOSLinker *linker, + uint16_t virtio_iommu_bdf, const char *oem_id, + const char *oem_table_id); + +#endif /* VIOT_H */ diff --git a/hw/acpi/viot.c b/hw/acpi/viot.c new file mode 100644 index 0000000000..e33d468e11 --- /dev/null +++ b/hw/acpi/viot.c @@ -0,0 +1,112 @@ +/* + * ACPI Virtual I/O Translation table implementation + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include "qemu/osdep.h" +#include "hw/acpi/acpi.h" +#include "hw/acpi/aml-build.h" +#include "hw/acpi/viot.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_host.h" + +struct viot_pci_ranges { + GArray *blob; + size_t count; + uint16_t output_node; +}; + +/* Build PCI range for a given PCI host bridge */ +static int build_pci_range_node(Object *obj, void *opaque) +{ + struct viot_pci_ranges *pci_ranges = opaque; + GArray *blob = pci_ranges->blob; + + if (object_dynamic_cast(obj, TYPE_PCI_HOST_BRIDGE)) { + PCIBus *bus = PCI_HOST_BRIDGE(obj)->bus; + + if (bus && !pci_bus_bypass_iommu(bus)) { + int min_bus, max_bus; + + pci_bus_range(bus, &min_bus, &max_bus); + + /* Type (PCI range) */ + build_append_int_noprefix(blob, 1, 1); + /* Reserved */ + build_append_int_noprefix(blob, 0, 1); + /* Length */ + build_append_int_noprefix(blob, 24, 2); + /* Endpoint start */ + build_append_int_noprefix(blob, PCI_BUILD_BDF(min_bus, 0), 4); + /* PCI Segment start */ + build_append_int_noprefix(blob, 0, 2); + /* PCI Segment end */ + build_append_int_noprefix(blob, 0, 2); + /* PCI BDF start */ + build_append_int_noprefix(blob, PCI_BUILD_BDF(min_bus, 0), 2); + /* PCI BDF end */ + build_append_int_noprefix(blob, PCI_BUILD_BDF(max_bus, 0xff), 2); + /* Output node */ + build_append_int_noprefix(blob, pci_ranges->output_node, 2); + /* Reserved */ + build_append_int_noprefix(blob, 0, 6); + + pci_ranges->count++; + } + } + + return 0; +} + +/* + * Generate a VIOT table with one PCI-based virtio-iommu that manages PCI + * endpoints. + */ +void build_viot(MachineState *ms, GArray *table_data, BIOSLinker *linker, + uint16_t virtio_iommu_bdf, const char *oem_id, + const char *oem_table_id) +{ + /* The virtio-iommu node follows the 48-bytes header */ + int viommu_off = 48; + AcpiTable table = { .sig = "VIOT", .rev = 0, + .oem_id = oem_id, .oem_table_id = oem_table_id }; + struct viot_pci_ranges pci_ranges = { + .output_node = viommu_off, + .blob = g_array_new(false, true /* clear */, 1), + }; + + /* Build the list of PCI ranges that this viommu manages */ + object_child_foreach_recursive(OBJECT(ms), build_pci_range_node, + &pci_ranges); + + /* ACPI table header */ + acpi_table_begin(&table, table_data); + /* Node count */ + build_append_int_noprefix(table_data, pci_ranges.count + 1, 2); + /* Node offset */ + build_append_int_noprefix(table_data, viommu_off, 2); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 8); + + /* Virtio-iommu node */ + /* Type (virtio-pci IOMMU) */ + build_append_int_noprefix(table_data, 3, 1); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 1); + /* Length */ + build_append_int_noprefix(table_data, 16, 2); + /* PCI Segment */ + build_append_int_noprefix(table_data, 0, 2); + /* PCI BDF number */ + build_append_int_noprefix(table_data, virtio_iommu_bdf, 2); + /* Reserved */ + build_append_int_noprefix(table_data, 0, 8); + + /* PCI ranges found above */ + g_array_append_vals(table_data, pci_ranges.blob->data, + pci_ranges.blob->len); + g_array_free(pci_ranges.blob, true); + + acpi_table_end(linker, &table); +} + diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig index 3b5e118c54..622b0b50b7 100644 --- a/hw/acpi/Kconfig +++ b/hw/acpi/Kconfig @@ -51,6 +51,10 @@ config ACPI_VMGENID default y depends on PC +config ACPI_VIOT + bool + depends on ACPI + config ACPI_HW_REDUCED bool select ACPI diff --git a/hw/acpi/meson.build b/hw/acpi/meson.build index 7d8c0eb43e..adf6347bc4 100644 --- a/hw/acpi/meson.build +++ b/hw/acpi/meson.build @@ -20,6 +20,7 @@ acpi_ss.add(when: 'CONFIG_ACPI_APEI', if_true: files('ghes.c'), if_false: files( acpi_ss.add(when: 'CONFIG_ACPI_PIIX4', if_true: files('piix4.c')) acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_true: files('pcihp.c')) acpi_ss.add(when: 'CONFIG_ACPI_PCIHP', if_false: files('acpi-pci-hotplug-stub.c')) +acpi_ss.add(when: 'CONFIG_ACPI_VIOT', if_true: files('viot.c')) acpi_ss.add(when: 'CONFIG_ACPI_X86_ICH', if_true: files('ich9.c', 'tco.c')) acpi_ss.add(when: 'CONFIG_IPMI', if_true: files('ipmi.c'), if_false: files('ipmi-stub.c')) acpi_ss.add(when: 'CONFIG_PC', if_false: files('acpi-x86-stub.c')) -- 2.33.0