As a general rule, we prefer avoiding implicit global state because it makes code harder to safely copy and paste without thinking about the global state. Adjust the helper code to use explicit state instead, and update all callers. Fix some trailing whitespace while touching the file. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
205 lines
5.9 KiB
C
205 lines
5.9 KiB
C
/*
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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 "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 "boot-sector.h"
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#include "acpi-utils.h"
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#include "libqtest.h"
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#include "qapi/qmp/qdict.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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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, rsdt_table_length;
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AcpiRsdtDescriptorRev1 rsdt_table;
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size_t 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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/* Wait for guest firmware to finish and start the payload. */
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boot_sector_test(global_qtest);
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/* Tables should be initialized now. */
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rsdp_offset = acpi_find_rsdp_address();
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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 = le32_to_cpu(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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rsdt_table_length = le32_to_cpu(rsdt_table.length);
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/* compute the table entries in rsdt */
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g_assert_cmpint(rsdt_table_length, >, sizeof(AcpiRsdtDescriptorRev1));
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tables_nr = (rsdt_table_length - sizeof(AcpiRsdtDescriptorRev1)) /
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sizeof(uint32_t);
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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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uint32_t addr = le32_to_cpu(tables[i]);
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ACPI_READ_TABLE_HEADER(&ssdt_table, addr);
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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, addr);
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g_assert(vgid_table.name_op == 0x08); /* name */
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ACPI_READ_ARRAY(vgid_table.vgia, addr);
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g_assert(memcmp(vgid_table.vgia, "VGIA", 4) == 0);
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ACPI_READ_FIELD(vgid_table.val_op, addr);
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g_assert(vgid_table.val_op == 0x0C); /* dword */
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ACPI_READ_FIELD(vgid_table.vgia_val, addr);
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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 = le32_to_cpu(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 char disk[] = "tests/vmgenid-test-disk-XXXXXX";
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#define GUID_CMD(guid) \
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"-machine accel=kvm:tcg " \
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"-device vmgenid,id=testvgid,guid=%s " \
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"-drive id=hd0,if=none,file=%s,format=raw " \
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"-device ide-hd,drive=hd0 ", guid, disk
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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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g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
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global_qtest = qtest_startf(GUID_CMD(VGID_GUID));
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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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}
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static void vmgenid_set_guid_auto_test(void)
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{
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QemuUUID measured;
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global_qtest = qtest_startf(GUID_CMD("auto"));
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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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g_assert(qemu_uuid_parse(VGID_GUID, &expected) == 0);
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global_qtest = qtest_startf(GUID_CMD(VGID_GUID));
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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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}
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int main(int argc, char **argv)
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{
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int ret;
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ret = boot_sector_init(disk);
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if (ret) {
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return ret;
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}
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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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boot_sector_cleanup(disk);
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return ret;
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}
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