Commit 53333801 authored by Marcel Apfelbaum's avatar Marcel Apfelbaum Committed by Michael S. Tsirkin
Browse files

acpi unit-test: verify signature and checksum 



Read all ACPI tables from guest - will be useful for further unit tests.

Follow pointers between ACPI tables checking signature and format for
correctness.  Verify checksum for all tables.

Signed-off-by: default avatarMarcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent b29ad07e

tests/acpi-test.c

+252 −20
Original line number Diff line number Diff line
@@ -13,13 +13,28 @@ 
#include <string.h>

#include <stdio.h>

#include <glib.h>

#include "qemu-common.h"

#include "libqtest.h"

#include "qemu/compiler.h"

#include "hw/i386/acpi-defs.h"



/* DSDT and SSDTs format */

typedef struct {

    const char *args;

    uint64_t expected_boot;

    uint64_t expected_reboot;

} boot_order_test;

    AcpiTableHeader header;

    uint8_t *aml;

    int aml_len;

} AcpiSdtTable;



typedef struct {

    uint32_t rsdp_addr;

    AcpiRsdpDescriptor rsdp_table;

    AcpiRsdtDescriptorRev1 rsdt_table;

    AcpiFadtDescriptorRev1 fadt_table;

    uint32_t *rsdt_tables_addr;

    int rsdt_tables_nr;

    AcpiSdtTable dsdt_table;

    AcpiSdtTable *ssdt_tables;

} test_data;



#define LOW(x) ((x) & 0xff)

#define HIGH(x) ((x) >> 8)
@@ -28,6 +43,51 @@ typedef struct { 
#define SIGNATURE_OFFSET 0x10

#define BOOT_SECTOR_ADDRESS 0x7c00



#define ACPI_READ_FIELD(field, addr)           \

    do {                                       \

        switch (sizeof(field)) {               \

        case 1:                                \

            field = readb(addr);               \

            break;                             \

        case 2:                                \

            field = le16_to_cpu(readw(addr));  \

            break;                             \

        case 4:                                \

            field = le32_to_cpu(readl(addr));  \

            break;                             \

        case 8:                                \

            field = le64_to_cpu(readq(addr));  \

            break;                             \

        default:                               \

            g_assert(false);                   \

        }                                      \

        addr += sizeof(field);                  \

    } while (0);



#define ACPI_READ_ARRAY_PTR(arr, length, addr)  \

    do {                                        \

        int idx;                                \

        for (idx = 0; idx < length; ++idx) {    \

            ACPI_READ_FIELD(arr[idx], addr);    \

        }                                       \

    } while (0);



#define ACPI_READ_ARRAY(arr, addr)                               \

    ACPI_READ_ARRAY_PTR(arr, sizeof(arr)/sizeof(arr[0]), addr)



#define ACPI_READ_TABLE_HEADER(table, addr)                      \

    do {                                                         \

        ACPI_READ_FIELD((table)->signature, addr);               \

        ACPI_READ_FIELD((table)->length, addr);                  \

        ACPI_READ_FIELD((table)->revision, addr);                \

        ACPI_READ_FIELD((table)->checksum, addr);                \

        ACPI_READ_ARRAY((table)->oem_id, addr);                  \

        ACPI_READ_ARRAY((table)->oem_table_id, addr);            \

        ACPI_READ_FIELD((table)->oem_revision, addr);            \

        ACPI_READ_ARRAY((table)->asl_compiler_id, addr);         \

        ACPI_READ_FIELD((table)->asl_compiler_revision, addr);   \

    } while (0);



/* Boot sector code: write SIGNATURE into memory,

 * then halt.

 */
@@ -57,6 +117,181 @@ static uint8_t boot_sector[0x200] = { 


static const char *disk = "tests/acpi-test-disk.raw";



static uint8_t acpi_checksum(const uint8_t *data, int len)

{

    int i;

    uint8_t sum = 0;



    for (i = 0; i < len; i++) {

        sum += data[i];

    }



    return sum;

}



static void test_acpi_rsdp_address(test_data *data)

{

    uint32_t off;



    /* OK, now find RSDP */

    for (off = 0xf0000; off < 0x100000; off += 0x10) {

        uint8_t sig[] = "RSD PTR ";

        int i;



        for (i = 0; i < sizeof sig - 1; ++i) {

            sig[i] = readb(off + i);

        }



        if (!memcmp(sig, "RSD PTR ", sizeof sig)) {

            break;

        }

    }



    g_assert_cmphex(off, <, 0x100000);

    data->rsdp_addr = off;

}



static void test_acpi_rsdp_table(test_data *data)

{

    AcpiRsdpDescriptor *rsdp_table = &data->rsdp_table;

    uint32_t addr = data->rsdp_addr;



    ACPI_READ_FIELD(rsdp_table->signature, addr);

    g_assert_cmphex(rsdp_table->signature, ==, ACPI_RSDP_SIGNATURE);



    ACPI_READ_FIELD(rsdp_table->checksum, addr);

    ACPI_READ_ARRAY(rsdp_table->oem_id, addr);

    ACPI_READ_FIELD(rsdp_table->revision, addr);

    ACPI_READ_FIELD(rsdp_table->rsdt_physical_address, addr);

    ACPI_READ_FIELD(rsdp_table->length, addr);



    /* rsdp checksum is not for the whole table, but for the first 20 bytes */

    g_assert(!acpi_checksum((uint8_t *)rsdp_table, 20));

}



static void test_acpi_rsdt_table(test_data *data)

{

    AcpiRsdtDescriptorRev1 *rsdt_table = &data->rsdt_table;

    uint32_t addr = data->rsdp_table.rsdt_physical_address;

    uint32_t *tables;

    int tables_nr;

    uint8_t checksum;



    /* read the header */

    ACPI_READ_TABLE_HEADER(rsdt_table, addr);

    g_assert_cmphex(rsdt_table->signature, ==, ACPI_RSDT_SIGNATURE);



    /* compute the table entries in rsdt */

    tables_nr = (rsdt_table->length - sizeof(AcpiRsdtDescriptorRev1)) /

                sizeof(uint32_t);

    g_assert_cmpint(tables_nr, >, 0);



    /* get the addresses of the tables pointed by rsdt */

    tables = g_new0(uint32_t, tables_nr);

    ACPI_READ_ARRAY_PTR(tables, tables_nr, addr);



    checksum = acpi_checksum((uint8_t *)rsdt_table, rsdt_table->length) +

               acpi_checksum((uint8_t *)tables, tables_nr * sizeof(uint32_t));

    g_assert(!checksum);



   /* SSDT tables after FADT */

    data->rsdt_tables_addr = tables;

    data->rsdt_tables_nr = tables_nr;

}



static void test_acpi_fadt_table(test_data *data)

{

    AcpiFadtDescriptorRev1 *fadt_table = &data->fadt_table;

    uint32_t addr;



    /* FADT table comes first */

    addr = data->rsdt_tables_addr[0];

    ACPI_READ_TABLE_HEADER(fadt_table, addr);



    ACPI_READ_FIELD(fadt_table->firmware_ctrl, addr);

    ACPI_READ_FIELD(fadt_table->dsdt, addr);

    ACPI_READ_FIELD(fadt_table->model, addr);

    ACPI_READ_FIELD(fadt_table->reserved1, addr);

    ACPI_READ_FIELD(fadt_table->sci_int, addr);

    ACPI_READ_FIELD(fadt_table->smi_cmd, addr);

    ACPI_READ_FIELD(fadt_table->acpi_enable, addr);

    ACPI_READ_FIELD(fadt_table->acpi_disable, addr);

    ACPI_READ_FIELD(fadt_table->S4bios_req, addr);

    ACPI_READ_FIELD(fadt_table->reserved2, addr);

    ACPI_READ_FIELD(fadt_table->pm1a_evt_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm1b_evt_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm1a_cnt_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm1b_cnt_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm2_cnt_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm_tmr_blk, addr);

    ACPI_READ_FIELD(fadt_table->gpe0_blk, addr);

    ACPI_READ_FIELD(fadt_table->gpe1_blk, addr);

    ACPI_READ_FIELD(fadt_table->pm1_evt_len, addr);

    ACPI_READ_FIELD(fadt_table->pm1_cnt_len, addr);

    ACPI_READ_FIELD(fadt_table->pm2_cnt_len, addr);

    ACPI_READ_FIELD(fadt_table->pm_tmr_len, addr);

    ACPI_READ_FIELD(fadt_table->gpe0_blk_len, addr);

    ACPI_READ_FIELD(fadt_table->gpe1_blk_len, addr);

    ACPI_READ_FIELD(fadt_table->gpe1_base, addr);

    ACPI_READ_FIELD(fadt_table->reserved3, addr);

    ACPI_READ_FIELD(fadt_table->plvl2_lat, addr);

    ACPI_READ_FIELD(fadt_table->plvl3_lat, addr);

    ACPI_READ_FIELD(fadt_table->flush_size, addr);

    ACPI_READ_FIELD(fadt_table->flush_stride, addr);

    ACPI_READ_FIELD(fadt_table->duty_offset, addr);

    ACPI_READ_FIELD(fadt_table->duty_width, addr);

    ACPI_READ_FIELD(fadt_table->day_alrm, addr);

    ACPI_READ_FIELD(fadt_table->mon_alrm, addr);

    ACPI_READ_FIELD(fadt_table->century, addr);

    ACPI_READ_FIELD(fadt_table->reserved4, addr);

    ACPI_READ_FIELD(fadt_table->reserved4a, addr);

    ACPI_READ_FIELD(fadt_table->reserved4b, addr);

    ACPI_READ_FIELD(fadt_table->flags, addr);



    g_assert_cmphex(fadt_table->signature, ==, ACPI_FACP_SIGNATURE);

    g_assert(!acpi_checksum((uint8_t *)fadt_table, fadt_table->length));

}



static void test_dst_table(AcpiSdtTable *sdt_table, uint32_t addr)

{

    uint8_t checksum;



    ACPI_READ_TABLE_HEADER(&sdt_table->header, addr);



    sdt_table->aml_len = sdt_table->header.length - sizeof(AcpiTableHeader);

    sdt_table->aml = g_malloc0(sdt_table->aml_len);

    ACPI_READ_ARRAY_PTR(sdt_table->aml, sdt_table->aml_len, addr);



    checksum = acpi_checksum((uint8_t *)sdt_table, sizeof(AcpiTableHeader)) +

               acpi_checksum(sdt_table->aml, sdt_table->aml_len);

    g_assert(!checksum);

}



static void test_acpi_dsdt_table(test_data *data)

{

    AcpiSdtTable *dsdt_table = &data->dsdt_table;

    uint32_t addr = data->fadt_table.dsdt;



    test_dst_table(dsdt_table, addr);

    g_assert_cmphex(dsdt_table->header.signature, ==, ACPI_DSDT_SIGNATURE);

}



static void test_acpi_ssdt_tables(test_data *data)

{

    AcpiSdtTable *ssdt_tables;

    int ssdt_tables_nr = data->rsdt_tables_nr - 1; /* fadt is first */

    int i;



    ssdt_tables = g_new0(AcpiSdtTable, ssdt_tables_nr);

    for (i = 0; i < ssdt_tables_nr; i++) {

        AcpiSdtTable *ssdt_table = &ssdt_tables[i];

        uint32_t addr = data->rsdt_tables_addr[i + 1]; /* fadt is first */



        test_dst_table(ssdt_table, addr);

    }

    data->ssdt_tables = ssdt_tables;

}



static void test_acpi_one(const char *params)

{

    char *args;
@@ -64,9 +299,9 @@ static void test_acpi_one(const char *params) 
    uint8_t signature_high;

    uint16_t signature;

    int i;

    uint32_t off;



    test_data data;



    memset(&data, 0, sizeof(data));

    args = g_strdup_printf("-net none -display none %s %s",

                           params ? params : "", disk);

    qtest_start(args);
@@ -90,22 +325,19 @@ static void test_acpi_one(const char *params) 
    }

    g_assert_cmphex(signature, ==, SIGNATURE);



    /* OK, now find RSDP */

    for (off = 0xf0000; off < 0x100000; off += 0x10)

    {

        uint8_t sig[] = "RSD PTR ";

        int i;



        for (i = 0; i < sizeof sig - 1; ++i) {

            sig[i] = readb(off + i);

        }

    test_acpi_rsdp_address(&data);

    test_acpi_rsdp_table(&data);

    test_acpi_rsdt_table(&data);

    test_acpi_fadt_table(&data);

    test_acpi_dsdt_table(&data);

    test_acpi_ssdt_tables(&data);



        if (!memcmp(sig, "RSD PTR ", sizeof sig)) {

            break;

        }

    g_free(data.rsdt_tables_addr);

    for (i = 0; i < (data.rsdt_tables_nr - 1); ++i) {

        g_free(data.ssdt_tables[i].aml);

    }



    g_assert_cmphex(off, <, 0x100000);

    g_free(data.ssdt_tables);

    g_free(data.dsdt_table.aml);



    qtest_quit(global_qtest);

    g_free(args);