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https://git.proxmox.com/git/fwupd
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82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
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* Copyright (C) 2020 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 <string.h>
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#include "fu-common.h"
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#include "fu-acpi-dmar.h"
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struct _FuAcpiDmar {
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GObject parent_instance;
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gboolean opt_in;
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};
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G_DEFINE_TYPE (FuAcpiDmar, fu_acpi_dmar, G_TYPE_OBJECT)
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#define DMAR_DMA_CTRL_PLATFORM_OPT_IN_FLAG 0x4
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FuAcpiDmar *
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fu_acpi_dmar_new (GBytes *blob, GError **error)
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{
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FuAcpiDmar *self = g_object_new (FU_TYPE_ACPI_DMAR, NULL);
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gchar creator_id[5] = { '\0' };
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gchar oem_table_id[9] = { '\0' };
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gchar signature[5] = { '\0' };
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gsize bufsz = 0;
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guint8 flags = 0;
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const guint8 *buf = g_bytes_get_data (blob, &bufsz);
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/* parse table */
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if (!fu_memcpy_safe ((guint8 *) signature, sizeof(signature), 0x0, /* dst */
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buf, bufsz, 0x00, /* src */
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sizeof(signature) - 1, error))
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return NULL;
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if (strcmp (signature, "DMAR") != 0) {
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g_set_error (error,
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G_IO_ERROR,
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G_IO_ERROR_NOT_SUPPORTED,
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"Not a DMAR table, got %s",
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signature);
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return NULL;
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}
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if (!fu_memcpy_safe ((guint8 *) oem_table_id, sizeof(oem_table_id), 0x0,/* dst */
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buf, bufsz, 0x10, /* src */
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sizeof(oem_table_id) - 1, error))
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return NULL;
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g_debug ("OemTableId: %s", oem_table_id);
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if (!fu_memcpy_safe ((guint8 *) creator_id, sizeof(creator_id), 0x0, /* dst */
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buf, bufsz, 0x1c, /* src */
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sizeof(creator_id) - 1, error))
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return NULL;
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g_debug ("CreatorId: %s", creator_id);
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if (!fu_memcpy_safe (&flags, sizeof(flags), 0x0, /* dst */
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buf, bufsz, 0x25, /* src */
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sizeof(flags), error))
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return NULL;
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g_debug ("Flags: 0x%02x", flags);
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self->opt_in = (flags & DMAR_DMA_CTRL_PLATFORM_OPT_IN_FLAG) > 0;
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return self;
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}
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gboolean
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fu_acpi_dmar_get_opt_in (FuAcpiDmar *self)
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{
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g_return_val_if_fail (FU_IS_ACPI_DMAR (self), FALSE);
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return self->opt_in;
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}
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static void
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fu_acpi_dmar_class_init (FuAcpiDmarClass *klass)
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{
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}
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static void
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fu_acpi_dmar_init (FuAcpiDmar *self)
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{
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}
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