tests: Add unit tests for the VM Generation ID feature
The following tests are implemented: * test that a GUID passed in by command line is propagated to the guest. Read the GUID from guest memory * test that the "auto" argument to the GUID generates a valid GUID, as seen by the guest. * test that a GUID passed in can be queried from the monitor This patch is loosely based on a previous patch from: Gal Hammer <ghammer@redhat.com> and Igor Mammedov <imammedo@redhat.com> Signed-off-by: Ben Warren <ben@skyportsystems.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Ben Warren
Michael S. Tsirkin
parent
b9ec9bd468
commit
83f3c70919
@ -250,6 +250,7 @@ check-qtest-i386-y += tests/usb-hcd-xhci-test$(EXESUF)
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gcov-files-i386-y += hw/usb/hcd-xhci.c
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gcov-files-i386-y += hw/usb/hcd-xhci.c
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check-qtest-i386-y += tests/pc-cpu-test$(EXESUF)
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check-qtest-i386-y += tests/pc-cpu-test$(EXESUF)
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check-qtest-i386-y += tests/q35-test$(EXESUF)
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check-qtest-i386-y += tests/q35-test$(EXESUF)
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check-qtest-i386-y += tests/vmgenid-test$(EXESUF)
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gcov-files-i386-y += hw/pci-host/q35.c
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gcov-files-i386-y += hw/pci-host/q35.c
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check-qtest-i386-$(CONFIG_VHOST_NET_TEST_i386) += tests/vhost-user-test$(EXESUF)
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check-qtest-i386-$(CONFIG_VHOST_NET_TEST_i386) += tests/vhost-user-test$(EXESUF)
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ifeq ($(CONFIG_VHOST_NET_TEST_i386),)
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ifeq ($(CONFIG_VHOST_NET_TEST_i386),)
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@ -760,6 +761,7 @@ tests/test-uuid$(EXESUF): tests/test-uuid.o $(test-util-obj-y)
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tests/test-arm-mptimer$(EXESUF): tests/test-arm-mptimer.o
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tests/test-arm-mptimer$(EXESUF): tests/test-arm-mptimer.o
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tests/test-qapi-util$(EXESUF): tests/test-qapi-util.o $(test-util-obj-y)
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tests/test-qapi-util$(EXESUF): tests/test-qapi-util.o $(test-util-obj-y)
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tests/numa-test$(EXESUF): tests/numa-test.o
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tests/numa-test$(EXESUF): tests/numa-test.o
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tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/acpi-utils.o
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tests/migration/stress$(EXESUF): tests/migration/stress.o
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tests/migration/stress$(EXESUF): tests/migration/stress.o
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$(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"LINK","$(TARGET_DIR)$@")
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$(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"LINK","$(TARGET_DIR)$@")
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203
tests/vmgenid-test.c
Normal file
203
tests/vmgenid-test.c
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@ -0,0 +1,203 @@
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/*
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* QTest testcase for VM Generation ID
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*
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* Copyright (c) 2016 Red Hat, Inc.
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* Copyright (c) 2017 Skyport Systems
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include <glib.h>
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#include <string.h>
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#include <unistd.h>
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#include "qemu/osdep.h"
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#include "qemu/bitmap.h"
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#include "qemu/uuid.h"
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#include "hw/acpi/acpi-defs.h"
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#include "acpi-utils.h"
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#include "libqtest.h"
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#define VGID_GUID "324e6eaf-d1d1-4bf6-bf41-b9bb6c91fb87"
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#define VMGENID_GUID_OFFSET 40 /* allow space for
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* OVMF SDT Header Probe Supressor
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*/
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#define RSDP_ADDR_INVALID 0x100000 /* RSDP must be below this address */
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#define RSDP_SLEEP_US 100000 /* Sleep for 100ms between tries */
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#define RSDP_TRIES_MAX 100 /* Max total time is 10 seconds */
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typedef struct {
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AcpiTableHeader header;
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gchar name_op;
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gchar vgia[4];
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gchar val_op;
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uint32_t vgia_val;
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} QEMU_PACKED VgidTable;
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static uint32_t acpi_find_vgia(void)
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{
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uint32_t rsdp_offset;
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uint32_t guid_offset = 0;
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AcpiRsdpDescriptor rsdp_table;
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uint32_t rsdt;
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AcpiRsdtDescriptorRev1 rsdt_table;
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int tables_nr;
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uint32_t *tables;
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AcpiTableHeader ssdt_table;
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VgidTable vgid_table;
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int i;
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/* Tables may take a short time to be set up by the guest */
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for (i = 0; i < RSDP_TRIES_MAX; i++) {
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rsdp_offset = acpi_find_rsdp_address();
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if (rsdp_offset < RSDP_ADDR_INVALID) {
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break;
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}
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g_usleep(RSDP_SLEEP_US);
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}
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g_assert_cmphex(rsdp_offset, <, RSDP_ADDR_INVALID);
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acpi_parse_rsdp_table(rsdp_offset, &rsdp_table);
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rsdt = rsdp_table.rsdt_physical_address;
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/* read the header */
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ACPI_READ_TABLE_HEADER(&rsdt_table, rsdt);
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ACPI_ASSERT_CMP(rsdt_table.signature, "RSDT");
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/* compute the table entries in rsdt */
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tables_nr = (rsdt_table.length - sizeof(AcpiRsdtDescriptorRev1)) /
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sizeof(uint32_t);
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g_assert_cmpint(tables_nr, >, 0);
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/* get the addresses of the tables pointed by rsdt */
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tables = g_new0(uint32_t, tables_nr);
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ACPI_READ_ARRAY_PTR(tables, tables_nr, rsdt);
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for (i = 0; i < tables_nr; i++) {
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ACPI_READ_TABLE_HEADER(&ssdt_table, tables[i]);
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if (!strncmp((char *)ssdt_table.oem_table_id, "VMGENID", 7)) {
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/* the first entry in the table should be VGIA
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* That's all we need
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*/
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ACPI_READ_FIELD(vgid_table.name_op, tables[i]);
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g_assert(vgid_table.name_op == 0x08); /* name */
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ACPI_READ_ARRAY(vgid_table.vgia, tables[i]);
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g_assert(memcmp(vgid_table.vgia, "VGIA", 4) == 0);
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ACPI_READ_FIELD(vgid_table.val_op, tables[i]);
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g_assert(vgid_table.val_op == 0x0C); /* dword */
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ACPI_READ_FIELD(vgid_table.vgia_val, tables[i]);
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/* The GUID is written at a fixed offset into the fw_cfg file
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* in order to implement the "OVMF SDT Header probe suppressor"
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* see docs/specs/vmgenid.txt for more details
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*/
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guid_offset = vgid_table.vgia_val + VMGENID_GUID_OFFSET;
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break;
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}
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}
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g_free(tables);
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return guid_offset;
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}
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static void read_guid_from_memory(QemuUUID *guid)
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{
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uint32_t vmgenid_addr;
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int i;
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vmgenid_addr = acpi_find_vgia();
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g_assert(vmgenid_addr);
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/* Read the GUID directly from guest memory */
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for (i = 0; i < 16; i++) {
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guid->data[i] = readb(vmgenid_addr + i);
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}
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/* The GUID is in little-endian format in the guest, while QEMU
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* uses big-endian. Swap after reading.
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*/
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qemu_uuid_bswap(guid);
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}
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static void read_guid_from_monitor(QemuUUID *guid)
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{
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QDict *rsp, *rsp_ret;
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const char *guid_str;
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rsp = qmp("{ 'execute': 'query-vm-generation-id' }");
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if (qdict_haskey(rsp, "return")) {
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rsp_ret = qdict_get_qdict(rsp, "return");
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g_assert(qdict_haskey(rsp_ret, "guid"));
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guid_str = qdict_get_str(rsp_ret, "guid");
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g_assert(qemu_uuid_parse(guid_str, guid) == 0);
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}
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QDECREF(rsp);
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}
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static void vmgenid_set_guid_test(void)
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{
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QemuUUID expected, measured;
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gchar *cmd;
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g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
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cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
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"guid=%s", VGID_GUID);
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qtest_start(cmd);
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/* Read the GUID from accessing guest memory */
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read_guid_from_memory(&measured);
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g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
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qtest_quit(global_qtest);
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g_free(cmd);
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}
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static void vmgenid_set_guid_auto_test(void)
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{
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const char *cmd;
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QemuUUID measured;
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cmd = "-machine accel=tcg -device vmgenid,id=testvgid," "guid=auto";
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qtest_start(cmd);
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read_guid_from_memory(&measured);
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/* Just check that the GUID is non-null */
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g_assert(!qemu_uuid_is_null(&measured));
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qtest_quit(global_qtest);
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}
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static void vmgenid_query_monitor_test(void)
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{
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QemuUUID expected, measured;
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gchar *cmd;
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g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
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cmd = g_strdup_printf("-machine accel=tcg -device vmgenid,id=testvgid,"
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"guid=%s", VGID_GUID);
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qtest_start(cmd);
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/* Read the GUID via the monitor */
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read_guid_from_monitor(&measured);
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g_assert(memcmp(measured.data, expected.data, sizeof(measured.data)) == 0);
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qtest_quit(global_qtest);
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g_free(cmd);
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}
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int main(int argc, char **argv)
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{
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int ret;
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g_test_init(&argc, &argv, NULL);
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qtest_add_func("/vmgenid/vmgenid/set-guid",
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vmgenid_set_guid_test);
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qtest_add_func("/vmgenid/vmgenid/set-guid-auto",
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vmgenid_set_guid_auto_test);
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qtest_add_func("/vmgenid/vmgenid/query-monitor",
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vmgenid_query_monitor_test);
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ret = g_test_run();
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return ret;
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}
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