diff options
Diffstat (limited to 'qemu/tests/ivshmem-test.c')
| -rw-r--r-- | qemu/tests/ivshmem-test.c | 518 |
1 files changed, 518 insertions, 0 deletions
diff --git a/qemu/tests/ivshmem-test.c b/qemu/tests/ivshmem-test.c new file mode 100644 index 000000000..c027ff1e0 --- /dev/null +++ b/qemu/tests/ivshmem-test.c @@ -0,0 +1,518 @@ +/* + * QTest testcase for ivshmem + * + * Copyright (c) 2014 SUSE LINUX Products GmbH + * Copyright (c) 2015 Red Hat, Inc. + * + * 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 <glib.h> +#include <glib/gstdio.h> +#include <sys/mman.h> +#include "contrib/ivshmem-server/ivshmem-server.h" +#include "libqos/pci-pc.h" +#include "libqtest.h" +#include "qemu-common.h" + +#define TMPSHMSIZE (1 << 20) +static char *tmpshm; +static void *tmpshmem; +static char *tmpdir; +static char *tmpserver; + +static void save_fn(QPCIDevice *dev, int devfn, void *data) +{ + QPCIDevice **pdev = (QPCIDevice **) data; + + *pdev = dev; +} + +static QPCIDevice *get_device(QPCIBus *pcibus) +{ + QPCIDevice *dev; + + dev = NULL; + qpci_device_foreach(pcibus, 0x1af4, 0x1110, save_fn, &dev); + g_assert(dev != NULL); + + return dev; +} + +typedef struct _IVState { + QTestState *qtest; + void *reg_base, *mem_base; + QPCIBus *pcibus; + QPCIDevice *dev; +} IVState; + +enum Reg { + INTRMASK = 0, + INTRSTATUS = 4, + IVPOSITION = 8, + DOORBELL = 12, +}; + +static const char* reg2str(enum Reg reg) { + switch (reg) { + case INTRMASK: + return "IntrMask"; + case INTRSTATUS: + return "IntrStatus"; + case IVPOSITION: + return "IVPosition"; + case DOORBELL: + return "DoorBell"; + default: + return NULL; + } +} + +static inline unsigned in_reg(IVState *s, enum Reg reg) +{ + const char *name = reg2str(reg); + QTestState *qtest = global_qtest; + unsigned res; + + global_qtest = s->qtest; + res = qpci_io_readl(s->dev, s->reg_base + reg); + g_test_message("*%s -> %x\n", name, res); + global_qtest = qtest; + + return res; +} + +static inline void out_reg(IVState *s, enum Reg reg, unsigned v) +{ + const char *name = reg2str(reg); + QTestState *qtest = global_qtest; + + global_qtest = s->qtest; + g_test_message("%x -> *%s\n", v, name); + qpci_io_writel(s->dev, s->reg_base + reg, v); + global_qtest = qtest; +} + +static void cleanup_vm(IVState *s) +{ + g_free(s->dev); + qpci_free_pc(s->pcibus); + qtest_quit(s->qtest); +} + +static void setup_vm_cmd(IVState *s, const char *cmd, bool msix) +{ + uint64_t barsize; + + s->qtest = qtest_start(cmd); + s->pcibus = qpci_init_pc(); + s->dev = get_device(s->pcibus); + + s->reg_base = qpci_iomap(s->dev, 0, &barsize); + g_assert_nonnull(s->reg_base); + g_assert_cmpuint(barsize, ==, 256); + + if (msix) { + qpci_msix_enable(s->dev); + } + + s->mem_base = qpci_iomap(s->dev, 2, &barsize); + g_assert_nonnull(s->mem_base); + g_assert_cmpuint(barsize, ==, TMPSHMSIZE); + + qpci_device_enable(s->dev); +} + +static void setup_vm(IVState *s) +{ + char *cmd = g_strdup_printf("-object memory-backend-file" + ",id=mb1,size=1M,share,mem-path=/dev/shm%s" + " -device ivshmem-plain,memdev=mb1", tmpshm); + + setup_vm_cmd(s, cmd, false); + + g_free(cmd); +} + +static void test_ivshmem_single(void) +{ + IVState state, *s; + uint32_t data[1024]; + int i; + + setup_vm(&state); + s = &state; + + /* initial state of readable registers */ + g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0); + g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0); + g_assert_cmpuint(in_reg(s, IVPOSITION), ==, 0); + + /* trigger interrupt via registers */ + out_reg(s, INTRMASK, 0xffffffff); + g_assert_cmpuint(in_reg(s, INTRMASK), ==, 0xffffffff); + out_reg(s, INTRSTATUS, 1); + /* check interrupt status */ + g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 1); + /* reading clears */ + g_assert_cmpuint(in_reg(s, INTRSTATUS), ==, 0); + /* TODO intercept actual interrupt (needs qtest work) */ + + /* invalid register access */ + out_reg(s, IVPOSITION, 1); + in_reg(s, DOORBELL); + + /* ring the (non-functional) doorbell */ + out_reg(s, DOORBELL, 8 << 16); + + /* write shared memory */ + for (i = 0; i < G_N_ELEMENTS(data); i++) { + data[i] = i; + } + qtest_memwrite(s->qtest, (uintptr_t)s->mem_base, data, sizeof(data)); + + /* verify write */ + for (i = 0; i < G_N_ELEMENTS(data); i++) { + g_assert_cmpuint(((uint32_t *)tmpshmem)[i], ==, i); + } + + /* read it back and verify read */ + memset(data, 0, sizeof(data)); + qtest_memread(s->qtest, (uintptr_t)s->mem_base, data, sizeof(data)); + for (i = 0; i < G_N_ELEMENTS(data); i++) { + g_assert_cmpuint(data[i], ==, i); + } + + cleanup_vm(s); +} + +static void test_ivshmem_pair(void) +{ + IVState state1, state2, *s1, *s2; + char *data; + int i; + + setup_vm(&state1); + s1 = &state1; + setup_vm(&state2); + s2 = &state2; + + data = g_malloc0(TMPSHMSIZE); + + /* host write, guest 1 & 2 read */ + memset(tmpshmem, 0x42, TMPSHMSIZE); + qtest_memread(s1->qtest, (uintptr_t)s1->mem_base, data, TMPSHMSIZE); + for (i = 0; i < TMPSHMSIZE; i++) { + g_assert_cmpuint(data[i], ==, 0x42); + } + qtest_memread(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE); + for (i = 0; i < TMPSHMSIZE; i++) { + g_assert_cmpuint(data[i], ==, 0x42); + } + + /* guest 1 write, guest 2 read */ + memset(data, 0x43, TMPSHMSIZE); + qtest_memwrite(s1->qtest, (uintptr_t)s1->mem_base, data, TMPSHMSIZE); + memset(data, 0, TMPSHMSIZE); + qtest_memread(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE); + for (i = 0; i < TMPSHMSIZE; i++) { + g_assert_cmpuint(data[i], ==, 0x43); + } + + /* guest 2 write, guest 1 read */ + memset(data, 0x44, TMPSHMSIZE); + qtest_memwrite(s2->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE); + memset(data, 0, TMPSHMSIZE); + qtest_memread(s1->qtest, (uintptr_t)s2->mem_base, data, TMPSHMSIZE); + for (i = 0; i < TMPSHMSIZE; i++) { + g_assert_cmpuint(data[i], ==, 0x44); + } + + cleanup_vm(s1); + cleanup_vm(s2); + g_free(data); +} + +typedef struct ServerThread { + GThread *thread; + IvshmemServer *server; + int pipe[2]; /* to handle quit */ +} ServerThread; + +static void *server_thread(void *data) +{ + ServerThread *t = data; + IvshmemServer *server = t->server; + + while (true) { + fd_set fds; + int maxfd, ret; + + FD_ZERO(&fds); + FD_SET(t->pipe[0], &fds); + maxfd = t->pipe[0] + 1; + + ivshmem_server_get_fds(server, &fds, &maxfd); + + ret = select(maxfd, &fds, NULL, NULL, NULL); + + if (ret < 0) { + if (errno == EINTR) { + continue; + } + + g_critical("select error: %s\n", strerror(errno)); + break; + } + if (ret == 0) { + continue; + } + + if (FD_ISSET(t->pipe[0], &fds)) { + break; + } + + if (ivshmem_server_handle_fds(server, &fds, maxfd) < 0) { + g_critical("ivshmem_server_handle_fds() failed\n"); + break; + } + } + + return NULL; +} + +static void setup_vm_with_server(IVState *s, int nvectors, bool msi) +{ + char *cmd = g_strdup_printf("-chardev socket,id=chr0,path=%s,nowait " + "-device ivshmem%s,chardev=chr0,vectors=%d", + tmpserver, + msi ? "-doorbell" : ",size=1M,msi=off", + nvectors); + + setup_vm_cmd(s, cmd, msi); + + g_free(cmd); +} + +static void test_ivshmem_server(bool msi) +{ + IVState state1, state2, *s1, *s2; + ServerThread thread; + IvshmemServer server; + int ret, vm1, vm2; + int nvectors = 2; + guint64 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND; + + ret = ivshmem_server_init(&server, tmpserver, tmpshm, true, + TMPSHMSIZE, nvectors, + g_test_verbose()); + g_assert_cmpint(ret, ==, 0); + + ret = ivshmem_server_start(&server); + g_assert_cmpint(ret, ==, 0); + + thread.server = &server; + ret = pipe(thread.pipe); + g_assert_cmpint(ret, ==, 0); + thread.thread = g_thread_new("ivshmem-server", server_thread, &thread); + g_assert(thread.thread != NULL); + + setup_vm_with_server(&state1, nvectors, msi); + s1 = &state1; + setup_vm_with_server(&state2, nvectors, msi); + s2 = &state2; + + /* check got different VM ids */ + vm1 = in_reg(s1, IVPOSITION); + vm2 = in_reg(s2, IVPOSITION); + g_assert_cmpint(vm1, >=, 0); + g_assert_cmpint(vm2, >=, 0); + g_assert_cmpint(vm1, !=, vm2); + + /* check number of MSI-X vectors */ + global_qtest = s1->qtest; + if (msi) { + ret = qpci_msix_table_size(s1->dev); + g_assert_cmpuint(ret, ==, nvectors); + } + + /* TODO test behavior before MSI-X is enabled */ + + /* ping vm2 -> vm1 on vector 0 */ + if (msi) { + ret = qpci_msix_pending(s1->dev, 0); + g_assert_cmpuint(ret, ==, 0); + } else { + g_assert_cmpuint(in_reg(s1, INTRSTATUS), ==, 0); + } + out_reg(s2, DOORBELL, vm1 << 16); + do { + g_usleep(10000); + ret = msi ? qpci_msix_pending(s1->dev, 0) : in_reg(s1, INTRSTATUS); + } while (ret == 0 && g_get_monotonic_time() < end_time); + g_assert_cmpuint(ret, !=, 0); + + /* ping vm1 -> vm2 on vector 1 */ + global_qtest = s2->qtest; + if (msi) { + ret = qpci_msix_pending(s2->dev, 1); + g_assert_cmpuint(ret, ==, 0); + } else { + g_assert_cmpuint(in_reg(s2, INTRSTATUS), ==, 0); + } + out_reg(s1, DOORBELL, vm2 << 16 | 1); + do { + g_usleep(10000); + ret = msi ? qpci_msix_pending(s2->dev, 1) : in_reg(s2, INTRSTATUS); + } while (ret == 0 && g_get_monotonic_time() < end_time); + g_assert_cmpuint(ret, !=, 0); + + cleanup_vm(s2); + cleanup_vm(s1); + + if (qemu_write_full(thread.pipe[1], "q", 1) != 1) { + g_error("qemu_write_full: %s", g_strerror(errno)); + } + + g_thread_join(thread.thread); + + ivshmem_server_close(&server); + close(thread.pipe[1]); + close(thread.pipe[0]); +} + +static void test_ivshmem_server_msi(void) +{ + test_ivshmem_server(true); +} + +static void test_ivshmem_server_irq(void) +{ + test_ivshmem_server(false); +} + +#define PCI_SLOT_HP 0x06 + +static void test_ivshmem_hotplug(void) +{ + gchar *opts; + + qtest_start(""); + + opts = g_strdup_printf("'shm': '%s', 'size': '1M'", tmpshm); + + qpci_plug_device_test("ivshmem", "iv1", PCI_SLOT_HP, opts); + qpci_unplug_acpi_device_test("iv1", PCI_SLOT_HP); + + qtest_end(); + g_free(opts); +} + +static void test_ivshmem_memdev(void) +{ + IVState state; + + /* just for the sake of checking memory-backend property */ + setup_vm_cmd(&state, "-object memory-backend-ram,size=1M,id=mb1" + " -device ivshmem-plain,memdev=mb1", false); + + cleanup_vm(&state); +} + +static void cleanup(void) +{ + if (tmpshmem) { + munmap(tmpshmem, TMPSHMSIZE); + tmpshmem = NULL; + } + + if (tmpshm) { + shm_unlink(tmpshm); + g_free(tmpshm); + tmpshm = NULL; + } + + if (tmpserver) { + g_unlink(tmpserver); + g_free(tmpserver); + tmpserver = NULL; + } + + if (tmpdir) { + g_rmdir(tmpdir); + tmpdir = NULL; + } +} + +static void abrt_handler(void *data) +{ + cleanup(); +} + +static gchar *mktempshm(int size, int *fd) +{ + while (true) { + gchar *name; + + name = g_strdup_printf("/qtest-%u-%u", getpid(), g_random_int()); + *fd = shm_open(name, O_CREAT|O_RDWR|O_EXCL, + S_IRWXU|S_IRWXG|S_IRWXO); + if (*fd > 0) { + g_assert(ftruncate(*fd, size) == 0); + return name; + } + + g_free(name); + + if (errno != EEXIST) { + perror("shm_open"); + return NULL; + } + } +} + +int main(int argc, char **argv) +{ + int ret, fd; + gchar dir[] = "/tmp/ivshmem-test.XXXXXX"; + +#if !GLIB_CHECK_VERSION(2, 31, 0) + if (!g_thread_supported()) { + g_thread_init(NULL); + } +#endif + + g_test_init(&argc, &argv, NULL); + + qtest_add_abrt_handler(abrt_handler, NULL); + /* shm */ + tmpshm = mktempshm(TMPSHMSIZE, &fd); + if (!tmpshm) { + return 0; + } + tmpshmem = mmap(0, TMPSHMSIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + g_assert(tmpshmem != MAP_FAILED); + /* server */ + if (mkdtemp(dir) == NULL) { + g_error("mkdtemp: %s", g_strerror(errno)); + } + tmpdir = dir; + tmpserver = g_strconcat(tmpdir, "/server", NULL); + + qtest_add_func("/ivshmem/single", test_ivshmem_single); + qtest_add_func("/ivshmem/hotplug", test_ivshmem_hotplug); + qtest_add_func("/ivshmem/memdev", test_ivshmem_memdev); + if (g_test_slow()) { + qtest_add_func("/ivshmem/pair", test_ivshmem_pair); + qtest_add_func("/ivshmem/server-msi", test_ivshmem_server_msi); + qtest_add_func("/ivshmem/server-irq", test_ivshmem_server_irq); + } + + ret = g_test_run(); + + cleanup(); + + return ret; +} |