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/*
* 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_parse_rsdp_table(qts, rsdp_offset, rsdp_table);
acpi_fetch_table(qts, &rsdt, &rsdt_len, &rsdp_table[16 /* RsdtAddress */],
"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, 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.
*/
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) \
"-machine accel=kvm: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;
}
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