qemu-e2k/hw/acpi/hmat.c

/*
 * HMAT ACPI Implementation
 *
 * Copyright(C) 2019 Intel Corporation.
 *
 * Author:
 *  Liu jingqi <jingqi.liu@linux.intel.com>
 *  Tao Xu <tao3.xu@intel.com>
 *
 * HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
 * (HMAT)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>
 */

#include "qemu/osdep.h"
#include "sysemu/numa.h"
#include "hw/acpi/hmat.h"

/*
 * ACPI 6.3:
 * 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145
 */
static void build_hmat_mpda(GArray *table_data, uint16_t flags,
                            uint32_t initiator, uint32_t mem_node)
{

    /* Memory Proximity Domain Attributes Structure */
    /* Type */
    build_append_int_noprefix(table_data, 0, 2);
    /* Reserved */
    build_append_int_noprefix(table_data, 0, 2);
    /* Length */
    build_append_int_noprefix(table_data, 40, 4);
    /* Flags */
    build_append_int_noprefix(table_data, flags, 2);
    /* Reserved */
    build_append_int_noprefix(table_data, 0, 2);
    /* Proximity Domain for the Attached Initiator */
    build_append_int_noprefix(table_data, initiator, 4);
    /* Proximity Domain for the Memory */
    build_append_int_noprefix(table_data, mem_node, 4);
    /* Reserved */
    build_append_int_noprefix(table_data, 0, 4);
    /*
     * Reserved:
     * Previously defined as the Start Address of the System Physical
     * Address Range. Deprecated since ACPI Spec 6.3.
     */
    build_append_int_noprefix(table_data, 0, 8);
    /*
     * Reserved:
     * Previously defined as the Range Length of the region in bytes.
     * Deprecated since ACPI Spec 6.3.
     */
    build_append_int_noprefix(table_data, 0, 8);
}

/* Build HMAT sub table structures */
static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
{
    uint16_t flags;
    int i;

    for (i = 0; i < numa_state->num_nodes; i++) {
        flags = 0;

        if (numa_state->nodes[i].initiator < MAX_NODES) {
            flags |= HMAT_PROXIMITY_INITIATOR_VALID;
        }

        build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i);
    }
}

void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state)
{
    int hmat_start = table_data->len;

    /* reserve space for HMAT header  */
    acpi_data_push(table_data, 40);

    hmat_build_table_structs(table_data, numa_state);

    build_header(linker, table_data,
                 (void *)(table_data->data + hmat_start),
                 "HMAT", table_data->len - hmat_start, 2, NULL, NULL);
}