qemu

vmgenid-test.c (5398B)

---

 /*
  * QTest testcase for VM Generation ID
  *
  * Copyright (c) 2016 Red Hat, Inc.
  * Copyright (c) 2017 Skyport Systems
  *
  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  * See the COPYING file in the top-level directory.
  */
 
 #include "qemu/osdep.h"
 #include "qemu/bitmap.h"
 #include "qemu/uuid.h"
 #include "hw/acpi/acpi-defs.h"
 #include "boot-sector.h"
 #include "acpi-utils.h"
 #include "libqtest.h"
 #include "qapi/qmp/qdict.h"
 
 #define VGID_GUID "324e6eaf-d1d1-4bf6-bf41-b9bb6c91fb87"
 #define VMGENID_GUID_OFFSET 40   /* allow space for
                                   * OVMF SDT Header Probe Supressor
                                   */
 #define RSDP_ADDR_INVALID 0x100000 /* RSDP must be below this address */
 
 static uint32_t acpi_find_vgia(QTestState *qts)
 {
     uint32_t rsdp_offset;
     uint32_t guid_offset = 0;
     uint8_t rsdp_table[36 /* ACPI 2.0+ RSDP size */];
     uint32_t rsdt_len, table_length;
     uint8_t *rsdt, *ent;
 
     /* Wait for guest firmware to finish and start the payload. */
     boot_sector_test(qts);
 
     /* Tables should be initialized now. */
     rsdp_offset = acpi_find_rsdp_address(qts);
 
     g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
 
 
     acpi_fetch_rsdp_table(qts, rsdp_offset, rsdp_table);
     acpi_fetch_table(qts, &rsdt, &rsdt_len, &rsdp_table[16 /* RsdtAddress */],
                      4, "RSDT", true);
 
     ACPI_FOREACH_RSDT_ENTRY(rsdt, rsdt_len, ent, 4 /* Entry size */) {
         uint8_t *table_aml;
 
         acpi_fetch_table(qts, &table_aml, &table_length, ent, 4, NULL, true);
         if (!memcmp(table_aml + 16 /* OEM Table ID */, "VMGENID", 7)) {
             uint32_t vgia_val;
             uint8_t *aml = &table_aml[36 /* AML byte-code start */];
             /* the first entry in the table should be VGIA
              * That's all we need
              */
             g_assert(aml[0 /* name_op*/] == 0x08);
             g_assert(memcmp(&aml[1 /* name */], "VGIA", 4) == 0);
             g_assert(aml[5 /* value op */] == 0x0C /* dword */);
             memcpy(&vgia_val, &aml[6 /* value */], 4);
 
             /* The GUID is written at a fixed offset into the fw_cfg file
              * in order to implement the "OVMF SDT Header probe suppressor"
              * see docs/specs/vmgenid.txt for more details
              */
             guid_offset = le32_to_cpu(vgia_val) + VMGENID_GUID_OFFSET;
             g_free(table_aml);
             break;
         }
         g_free(table_aml);
     }
     g_free(rsdt);
     return guid_offset;
 }
 
 static void read_guid_from_memory(QTestState *qts, QemuUUID *guid)
 {
     uint32_t vmgenid_addr;
     int i;
 
     vmgenid_addr = acpi_find_vgia(qts);
     g_assert(vmgenid_addr);
 
     /* Read the GUID directly from guest memory */
     for (i = 0; i < 16; i++) {
         guid->data[i] = qtest_readb(qts, vmgenid_addr + i);
     }
     /* The GUID is in little-endian format in the guest, while QEMU
      * uses big-endian.  Swap after reading.
      */
     *guid = qemu_uuid_bswap(*guid);
 }
 
 static void read_guid_from_monitor(QTestState *qts, QemuUUID *guid)
 {
     QDict *rsp, *rsp_ret;
     const char *guid_str;
 
     rsp = qtest_qmp(qts, "{ 'execute': 'query-vm-generation-id' }");
     if (qdict_haskey(rsp, "return")) {
         rsp_ret = qdict_get_qdict(rsp, "return");
         g_assert(qdict_haskey(rsp_ret, "guid"));
         guid_str = qdict_get_str(rsp_ret, "guid");
         g_assert(qemu_uuid_parse(guid_str, guid) == 0);
     }
     qobject_unref(rsp);
 }
 
 static char disk[] = "tests/vmgenid-test-disk-XXXXXX";
 
 #define GUID_CMD(guid)                          \
     "-accel kvm -accel tcg "                    \
     "-device vmgenid,id=testvgid,guid=%s "      \
     "-drive id=hd0,if=none,file=%s,format=raw " \
     "-device ide-hd,drive=hd0 ", guid, disk
 
 static void vmgenid_set_guid_test(void)
 {
     QemuUUID expected, measured;
     QTestState *qts;
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
     qts = qtest_initf(GUID_CMD(VGID_GUID));
 
     /* Read the GUID from accessing guest memory */
     read_guid_from_memory(qts, &measured);
     g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
 
     qtest_quit(qts);
 }
 
 static void vmgenid_set_guid_auto_test(void)
 {
     QemuUUID measured;
     QTestState *qts;
 
     qts = qtest_initf(GUID_CMD("auto"));
 
     read_guid_from_memory(qts, &measured);
 
     /* Just check that the GUID is non-null */
     g_assert(!qemu_uuid_is_null(&measured));
 
     qtest_quit(qts);
 }
 
 static void vmgenid_query_monitor_test(void)
 {
     QemuUUID expected, measured;
     QTestState *qts;
 
     g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
 
     qts = qtest_initf(GUID_CMD(VGID_GUID));
 
     /* Read the GUID via the monitor */
     read_guid_from_monitor(qts, &measured);
     g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
 
     qtest_quit(qts);
 }
 
 int main(int argc, char **argv)
 {
     int ret;
 
     ret = boot_sector_init(disk);
     if (ret) {
         return ret;
     }
 
     g_test_init(&argc, &argv, NULL);
 
     qtest_add_func("/vmgenid/vmgenid/set-guid",
                    vmgenid_set_guid_test);
     qtest_add_func("/vmgenid/vmgenid/set-guid-auto",
                    vmgenid_set_guid_auto_test);
     qtest_add_func("/vmgenid/vmgenid/query-monitor",
                    vmgenid_query_monitor_test);
     ret = g_test_run();
     boot_sector_cleanup(disk);
 
     return ret;
 }