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-rw-r--r--tests/vmgenid-test.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/tests/vmgenid-test.c b/tests/vmgenid-test.c
new file mode 100644
index 0000000000..e7ba38c9d1
--- /dev/null
+++ b/tests/vmgenid-test.c
@@ -0,0 +1,203 @@
+/*
+ * 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 <glib.h>
+#include <string.h>
+#include <unistd.h>
+#include "qemu/osdep.h"
+#include "qemu/bitmap.h"
+#include "qemu/uuid.h"
+#include "hw/acpi/acpi-defs.h"
+#include "acpi-utils.h"
+#include "libqtest.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 */
+#define RSDP_SLEEP_US 100000 /* Sleep for 100ms between tries */
+#define RSDP_TRIES_MAX 100 /* Max total time is 10 seconds */
+
+typedef struct {
+ AcpiTableHeader header;
+ gchar name_op;
+ gchar vgia[4];
+ gchar val_op;
+ uint32_t vgia_val;
+} QEMU_PACKED VgidTable;
+
+static uint32_t acpi_find_vgia(void)
+{
+ uint32_t rsdp_offset;
+ uint32_t guid_offset = 0;
+ AcpiRsdpDescriptor rsdp_table;
+ uint32_t rsdt;
+ AcpiRsdtDescriptorRev1 rsdt_table;
+ int tables_nr;
+ uint32_t *tables;
+ AcpiTableHeader ssdt_table;
+ VgidTable vgid_table;
+ int i;
+
+ /* Tables may take a short time to be set up by the guest */
+ for (i = 0; i < RSDP_TRIES_MAX; i++) {
+ rsdp_offset = acpi_find_rsdp_address();
+ if (rsdp_offset < RSDP_ADDR_INVALID) {
+ break;
+ }
+ g_usleep(RSDP_SLEEP_US);
+ }
+ g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
+
+ acpi_parse_rsdp_table(rsdp_offset, &rsdp_table);
+
+ rsdt = rsdp_table.rsdt_physical_address;
+ /* read the header */
+ ACPI_READ_TABLE_HEADER(&rsdt_table, rsdt);
+ ACPI_ASSERT_CMP(rsdt_table.signature, "RSDT");
+
+ /* 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, rsdt);
+
+ for (i = 0; i < tables_nr; i++) {
+ ACPI_READ_TABLE_HEADER(&ssdt_table, tables[i]);
+ if (!strncmp((char *)ssdt_table.oem_table_id, "VMGENID", 7)) {
+ /* the first entry in the table should be VGIA
+ * That's all we need
+ */
+ ACPI_READ_FIELD(vgid_table.name_op, tables[i]);
+ g_assert(vgid_table.name_op == 0x08); /* name */
+ ACPI_READ_ARRAY(vgid_table.vgia, tables[i]);
+ g_assert(memcmp(vgid_table.vgia, "VGIA", 4) == 0);
+ ACPI_READ_FIELD(vgid_table.val_op, tables[i]);
+ g_assert(vgid_table.val_op == 0x0C); /* dword */
+ ACPI_READ_FIELD(vgid_table.vgia_val, tables[i]);
+ /* 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 = vgid_table.vgia_val + VMGENID_GUID_OFFSET;
+ break;
+ }
+ }
+ g_free(tables);
+ return guid_offset;
+}
+
+static void read_guid_from_memory(QemuUUID *guid)
+{
+ uint32_t vmgenid_addr;
+ int i;
+
+ vmgenid_addr = acpi_find_vgia();
+ g_assert(vmgenid_addr);
+
+ /* Read the GUID directly from guest memory */
+ for (i = 0; i < 16; i++) {
+ guid->data[i] = readb(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(QemuUUID *guid)
+{
+ QDict *rsp, *rsp_ret;
+ const char *guid_str;
+
+ rsp = qmp("{ '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);
+ }
+ QDECREF(rsp);
+}
+
+static void vmgenid_set_guid_test(void)
+{
+ QemuUUID expected, measured;
+ gchar *cmd;
+
+ g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
+
+ cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
+ "guid=%s", VGID_GUID);
+ qtest_start(cmd);
+
+ /* Read the GUID from accessing guest memory */
+ read_guid_from_memory(&measured);
+ g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
+
+ qtest_quit(global_qtest);
+ g_free(cmd);
+}
+
+static void vmgenid_set_guid_auto_test(void)
+{
+ const char *cmd;
+ QemuUUID measured;
+
+ cmd = "-machine accel=tcg -device vmgenid,id=testvgid," "guid=auto";
+ qtest_start(cmd);
+
+ read_guid_from_memory(&measured);
+
+ /* Just check that the GUID is non-null */
+ g_assert(!qemu_uuid_is_null(&measured));
+
+ qtest_quit(global_qtest);
+}
+
+static void vmgenid_query_monitor_test(void)
+{
+ QemuUUID expected, measured;
+ gchar *cmd;
+
+ g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
+
+ cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
+ "guid=%s", VGID_GUID);
+ qtest_start(cmd);
+
+ /* Read the GUID via the monitor */
+ read_guid_from_monitor(&measured);
+ g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
+
+ qtest_quit(global_qtest);
+ g_free(cmd);
+}
+
+int main(int argc, char **argv)
+{
+ int 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();
+
+ return ret;
+}