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X-Received-From: 2607:f8b0:4003:c06::22b Subject: [Qemu-devel] [PATCH] tests: Add unit tests for the VM Generation ID feature X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Ben Warren via Qemu-devel Reply-To: ben@skyportsystems.com Cc: imammedo@redhat.com, lersek@redhat.com, Ben Warren Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Ben Warren 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 and Igor Mammedov Signed-off-by: Ben Warren Reviewed-by: Igor Mammedov Reviewed-by: Marc-Andr=C3=A9 Lureau --- Unchanged from v8, simply rebased to current top-of-tree tests/Makefile.include | 2 + tests/vmgenid-test.c | 200 +++++++++++++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 202 insertions(+) create mode 100644 tests/vmgenid-test.c diff --git a/tests/Makefile.include b/tests/Makefile.include index 75893838e5..79bf960336 100644 --- a/tests/Makefile.include +++ b/tests/Makefile.include @@ -250,6 +250,7 @@ check-qtest-i386-y +=3D tests/usb-hcd-xhci-test$(EXESUF) gcov-files-i386-y +=3D hw/usb/hcd-xhci.c check-qtest-i386-y +=3D tests/pc-cpu-test$(EXESUF) check-qtest-i386-y +=3D tests/q35-test$(EXESUF) +check-qtest-i386-y +=3D tests/vmgenid-test$(EXESUF) gcov-files-i386-y +=3D hw/pci-host/q35.c check-qtest-i386-$(CONFIG_VHOST_NET_TEST_i386) +=3D tests/vhost-user-test$= (EXESUF) ifeq ($(CONFIG_VHOST_NET_TEST_i386),) @@ -758,6 +759,7 @@ tests/test-uuid$(EXESUF): tests/test-uuid.o $(test-util= -obj-y) tests/test-arm-mptimer$(EXESUF): tests/test-arm-mptimer.o tests/test-qapi-util$(EXESUF): tests/test-qapi-util.o $(test-util-obj-y) tests/numa-test$(EXESUF): tests/numa-test.o +tests/vmgenid-test$(EXESUF): tests/vmgenid-test.o tests/acpi-utils.o =20 tests/migration/stress$(EXESUF): tests/migration/stress.o $(call quiet-command, $(LINKPROG) -static -O3 $(PTHREAD_LIB) -o $@ $< ,"L= INK","$(TARGET_DIR)$@") diff --git a/tests/vmgenid-test.c b/tests/vmgenid-test.c new file mode 100644 index 0000000000..123beaea13 --- /dev/null +++ b/tests/vmgenid-test.c @@ -0,0 +1,200 @@ +/* + * 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 late= r. + * See the COPYING file in the top-level directory. + */ + +#include +#include +#include +#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 off; + 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 =3D 0; i < RSDP_TRIES_MAX; i++) { + off =3D acpi_find_rsdp_address(); + if (off < RSDP_ADDR_INVALID) { + break; + } + g_usleep(RSDP_SLEEP_US); + } + g_assert_cmphex(off, <, RSDP_ADDR_INVALID); + + acpi_parse_rsdp_table(off, &rsdp_table); + + rsdt =3D 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 =3D (rsdt_table.length - sizeof(AcpiRsdtDescriptorRev1)) / + sizeof(uint32_t); + g_assert_cmpint(tables_nr, >, 0); + + /* get the addresses of the tables pointed by rsdt */ + tables =3D g_new0(uint32_t, tables_nr); + ACPI_READ_ARRAY_PTR(tables, tables_nr, rsdt); + + for (i =3D 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 =3D=3D 0x08); /* name */ + ACPI_READ_ARRAY(vgid_table.vgia, tables[i]); + g_assert(memcmp(vgid_table.vgia, "VGIA", 4) =3D=3D 0); + ACPI_READ_FIELD(vgid_table.val_op, tables[i]); + g_assert(vgid_table.val_op =3D=3D 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 + */ + return vgid_table.vgia_val + VMGENID_GUID_OFFSET; + } + } + return 0; +} + +static void read_guid_from_memory(QemuUUID *guid) +{ + uint32_t vmgenid_addr; + int i; + + vmgenid_addr =3D acpi_find_vgia(); + g_assert(vmgenid_addr); + + /* Read the GUID directly from guest memory */ + for (i =3D 0; i < 16; i++) { + guid->data[i] =3D 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 =3D qmp("{ 'execute': 'query-vm-generation-id' }"); + if (qdict_haskey(rsp, "return")) { + rsp_ret =3D qdict_get_qdict(rsp, "return"); + g_assert(qdict_haskey(rsp_ret, "guid")); + guid_str =3D qdict_get_str(rsp_ret, "guid"); + g_assert(qemu_uuid_parse(guid_str, guid) =3D=3D 0); + } + QDECREF(rsp); +} + +static void vmgenid_set_guid_test(void) +{ + QemuUUID expected, measured; + gchar *cmd; + + g_assert(qemu_uuid_parse(VGID_GUID, &expected) =3D=3D 0); + + cmd =3D g_strdup_printf("-machine accel=3Dtcg -device vmgenid,id=3Dtes= tvgid," + "guid=3D%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)) = =3D=3D 0); + + qtest_quit(global_qtest); + g_free(cmd); +} + +static void vmgenid_set_guid_auto_test(void) +{ + const char *cmd; + QemuUUID measured; + + cmd =3D "-machine accel=3Dtcg -device vmgenid,id=3Dtestvgid," "guid=3D= 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) =3D=3D 0); + + cmd =3D g_strdup_printf("-machine accel=3Dtcg -device vmgenid,id=3Dtes= tvgid," + "guid=3D%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)) = =3D=3D 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 =3D g_test_run(); + + return ret; +} --=20 2.11.0 (Apple Git-81)