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https://git.proxmox.com/git/fwupd
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64df25d0e7
This will let fwupd clients offer to change the BIOS setting for IOMMU. "IOMMU" -> Lenovo P620 "VtForDirectIo" -> Dell XPS 9310 "AmdVt" -> Lenovo P14s
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/*
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* Copyright (C) 2019 Richard Hughes <richard@hughsie.com>
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*
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* SPDX-License-Identifier: LGPL-2.1+
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*/
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#include "config.h"
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#include <fwupdplugin.h>
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struct FuPluginData {
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gboolean has_iommu;
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};
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static void
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fu_plugin_iommu_init(FuPlugin *plugin)
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{
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fu_plugin_alloc_data(plugin, sizeof(FuPluginData));
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fu_plugin_add_udev_subsystem(plugin, "iommu");
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}
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static void
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fu_plugin_iommu_to_string(FuPlugin *plugin, guint idt, GString *str)
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{
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FuPluginData *priv = fu_plugin_get_data(plugin);
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fu_string_append_kb(str, idt, "HasIommu", priv->has_iommu);
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}
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static gboolean
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fu_plugin_iommu_backend_device_added(FuPlugin *plugin, FuDevice *device, GError **error)
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{
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FuPluginData *priv = fu_plugin_get_data(plugin);
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/* interesting device? */
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if (!FU_IS_UDEV_DEVICE(device))
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return TRUE;
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if (g_strcmp0(fu_udev_device_get_subsystem(FU_UDEV_DEVICE(device)), "iommu") != 0)
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return TRUE;
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priv->has_iommu = TRUE;
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return TRUE;
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}
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static void
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fu_plugin_iommu_add_security_attrs(FuPlugin *plugin, FuSecurityAttrs *attrs)
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{
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FuPluginData *priv = fu_plugin_get_data(plugin);
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const gchar *iommu_attributes[] = {"AmdVt", "IOMMU", "VtForDirectIo", NULL};
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g_autoptr(FwupdSecurityAttr) attr = NULL;
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/* create attr */
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attr = fwupd_security_attr_new(FWUPD_SECURITY_ATTR_ID_IOMMU);
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fwupd_security_attr_set_plugin(attr, fu_plugin_get_name(plugin));
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fu_security_attrs_append(attrs, attr);
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if (priv == NULL) {
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fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_MISSING_DATA);
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return;
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}
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for (guint i = 0; iommu_attributes[i] != NULL; i++) {
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FwupdBiosAttr *bios_attr =
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fu_context_get_bios_attr(fu_plugin_get_context(plugin), iommu_attributes[i]);
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if (bios_attr != NULL) {
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fwupd_security_attr_set_bios_attr_id(attr,
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fwupd_bios_attr_get_id(bios_attr));
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fu_bios_attr_set_preferred_value(bios_attr, "enable");
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break;
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}
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}
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if (!priv->has_iommu) {
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fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_NOT_FOUND);
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fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_ACTION_CONTACT_OEM);
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fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_ACTION_CONFIG_FW);
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return;
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}
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/* success */
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fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_SUCCESS);
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fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_ENABLED);
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}
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void
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fu_plugin_init_vfuncs(FuPluginVfuncs *vfuncs)
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{
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vfuncs->build_hash = FU_BUILD_HASH;
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vfuncs->init = fu_plugin_iommu_init;
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vfuncs->to_string = fu_plugin_iommu_to_string;
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vfuncs->backend_device_added = fu_plugin_iommu_backend_device_added;
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vfuncs->add_security_attrs = fu_plugin_iommu_add_security_attrs;
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}
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