Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* Revert q35 to kernel irqchip (Alex)
* edu device fixes (Li Qiang)
* cleanups (Marc-André, Peter)
* Improvements to -accel help
* Better support for IA32_MISC_ENABLE MSR (Wanpeng)
* I2C test conversion to qgraph (Paolo)

# gpg: Signature made Mon 03 Jun 2019 14:20:12 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (24 commits)
  q35: Revert to kernel irqchip
  configure: remove tpm_passthrough & tpm_emulator
  ci: store Patchew configuration in the tree
  libqos: i2c: move address into QI2CDevice
  tests: convert ds1338-test to qtest
  tests: convert OMAP i2c tests to qgraph
  libqos: add ARM imx25-pdk machine object
  libqos: add ARM n800 machine object
  libqos: convert I2C to qgraph
  libqos: split I2CAdapter initialization and allocation
  imx25-pdk: create ds1338 for qtest inside the test
  pca9552-test: do not rely on state across tests
  libqos: fix omap-i2c receiving more than 4 bytes
  libqos: move common i2c code to libqos
  qgraph: fix qos_node_contains with options
  qgraph: allow extra_device_opts on contains nodes
  edu: uses uint64_t in dma operation
  edu: mmio: allow 64-bit access in read dispatch
  edu: mmio: allow 64-bit access
  i386: Enable IA32_MISC_ENABLE MWAIT bit when exposing mwait/monitor
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

14 files changed, 515 insertions, 258 deletions

diff --git a/tests/Makefile.include b/tests/Makefile.include
index 1865f6b322..46a36c2c95 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -255,9 +255,6 @@ check-qtest-sparc64-$(CONFIG_ISA_TESTDEV) = tests/endianness-test$(EXESUF)
 check-qtest-sparc64-y += tests/prom-env-test$(EXESUF)
 check-qtest-sparc64-y += tests/boot-serial-test$(EXESUF)
 
-check-qtest-arm-y += tests/tmp105-test$(EXESUF)
-check-qtest-arm-y += tests/pca9552-test$(EXESUF)
-check-qtest-arm-y += tests/ds1338-test$(EXESUF)
 check-qtest-arm-y += tests/microbit-test$(EXESUF)
 check-qtest-arm-y += tests/m25p80-test$(EXESUF)
 check-qtest-arm-y += tests/test-arm-mptimer$(EXESUF)
@@ -678,7 +675,7 @@ libqgraph-obj-y = tests/libqos/qgraph.o
 
 libqos-obj-y = $(libqgraph-obj-y) tests/libqos/pci.o tests/libqos/fw_cfg.o
 libqos-obj-y += tests/libqos/malloc.o
-libqos-obj-y += tests/libqos/i2c.o tests/libqos/libqos.o
+libqos-obj-y += tests/libqos/libqos.o
 libqos-spapr-obj-y = $(libqos-obj-y) tests/libqos/malloc-spapr.o
 libqos-spapr-obj-y += tests/libqos/libqos-spapr.o
 libqos-spapr-obj-y += tests/libqos/rtas.o
@@ -686,14 +683,15 @@ libqos-spapr-obj-y += tests/libqos/pci-spapr.o
 libqos-pc-obj-y = $(libqos-obj-y) tests/libqos/pci-pc.o
 libqos-pc-obj-y += tests/libqos/malloc-pc.o tests/libqos/libqos-pc.o
 libqos-pc-obj-y += tests/libqos/ahci.o
-libqos-omap-obj-y = $(libqos-obj-y) tests/libqos/i2c-omap.o
-libqos-imx-obj-y = $(libqos-obj-y) tests/libqos/i2c-imx.o
 libqos-usb-obj-y = $(libqos-spapr-obj-y) $(libqos-pc-obj-y) tests/libqos/usb.o
 
 # Devices
 qos-test-obj-y = tests/qos-test.o $(libqgraph-obj-y)
 qos-test-obj-y += $(libqos-pc-obj-y) $(libqos-spapr-obj-y)
 qos-test-obj-y += tests/libqos/e1000e.o
+qos-test-obj-y += tests/libqos/i2c.o
+qos-test-obj-y += tests/libqos/i2c-imx.o
+qos-test-obj-y += tests/libqos/i2c-omap.o
 qos-test-obj-y += tests/libqos/sdhci.o
 qos-test-obj-y += tests/libqos/tpci200.o
 qos-test-obj-y += tests/libqos/virtio.o
@@ -709,6 +707,8 @@ qos-test-obj-y += tests/libqos/virtio-serial.o
 
 # Machines
 qos-test-obj-y += tests/libqos/aarch64-xlnx-zcu102-machine.o
+qos-test-obj-y += tests/libqos/arm-imx25-pdk-machine.o
+qos-test-obj-y += tests/libqos/arm-n800-machine.o
 qos-test-obj-y += tests/libqos/arm-raspi2-machine.o
 qos-test-obj-y += tests/libqos/arm-sabrelite-machine.o
 qos-test-obj-y += tests/libqos/arm-smdkc210-machine.o
@@ -719,6 +719,7 @@ qos-test-obj-y += tests/libqos/x86_64_pc-machine.o
 
 # Tests
 qos-test-obj-y += tests/ac97-test.o
+qos-test-obj-y += tests/ds1338-test.o
 qos-test-obj-y += tests/e1000-test.o
 qos-test-obj-y += tests/e1000e-test.o
 qos-test-obj-y += tests/eepro100-test.o
@@ -727,10 +728,12 @@ qos-test-obj-y += tests/ipoctal232-test.o
 qos-test-obj-y += tests/megasas-test.o
 qos-test-obj-y += tests/ne2000-test.o
 qos-test-obj-y += tests/nvme-test.o
+qos-test-obj-y += tests/pca9552-test.o
 qos-test-obj-y += tests/pci-test.o
 qos-test-obj-y += tests/pcnet-test.o
 qos-test-obj-y += tests/sdhci-test.o
 qos-test-obj-y += tests/spapr-phb-test.o
+qos-test-obj-y += tests/tmp105-test.o
 qos-test-obj-y += tests/usb-hcd-ohci-test.o $(libqos-usb-obj-y)
 qos-test-obj-$(CONFIG_VHOST_NET_USER) += tests/vhost-user-test.o $(chardev-obj-y) $(test-io-obj-y)
 qos-test-obj-y += tests/virtio-test.o
@@ -768,9 +771,6 @@ tests/boot-serial-test$(EXESUF): tests/boot-serial-test.o $(libqos-obj-y)
 tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o \
 	tests/boot-sector.o tests/acpi-utils.o $(libqos-obj-y)
 tests/pxe-test$(EXESUF): tests/pxe-test.o tests/boot-sector.o $(libqos-obj-y)
-tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y)
-tests/pca9552-test$(EXESUF): tests/pca9552-test.o $(libqos-omap-obj-y)
-tests/ds1338-test$(EXESUF): tests/ds1338-test.o $(libqos-imx-obj-y)
 tests/microbit-test$(EXESUF): tests/microbit-test.o
 tests/m25p80-test$(EXESUF): tests/m25p80-test.o
 tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y)
diff --git a/tests/ds1338-test.c b/tests/ds1338-test.c
index 742dad9113..f6ade9a050 100644
--- a/tests/ds1338-test.c
+++ b/tests/ds1338-test.c
@@ -21,31 +21,22 @@
 #include "libqtest.h"
 #include "libqos/i2c.h"
 
-#define IMX25_I2C_0_BASE 0x43F80000
-
 #define DS1338_ADDR 0x68
 
-static I2CAdapter *i2c;
-static uint8_t addr;
-
 static inline uint8_t bcd2bin(uint8_t x)
 {
     return ((x) & 0x0f) + ((x) >> 4) * 10;
 }
 
-static void send_and_receive(void)
+static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
 {
-    uint8_t cmd[1];
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
+
     uint8_t resp[7];
     time_t now = time(NULL);
     struct tm *tm_ptr = gmtime(&now);
 
-    /* reset the index in the RTC memory */
-    cmd[0] = 0;
-    i2c_send(i2c, addr, cmd, 1);
-
-    /* retrieve the date */
-    i2c_recv(i2c, addr, resp, 7);
+    i2c_read_block(i2cdev, 0, resp, sizeof(resp));
 
     /* check retrieved time againt local time */
     g_assert_cmpuint(bcd2bin(resp[4]), == , tm_ptr->tm_mday);
@@ -53,23 +44,15 @@ static void send_and_receive(void)
     g_assert_cmpuint(2000 + bcd2bin(resp[6]), == , 1900 + tm_ptr->tm_year);
 }
 
-int main(int argc, char **argv)
+static void ds1338_register_nodes(void)
 {
-    QTestState *s = NULL;
-    int ret;
-
-    g_test_init(&argc, &argv, NULL);
-
-    s = qtest_start("-display none -machine imx25-pdk");
-    i2c = imx_i2c_create(s, IMX25_I2C_0_BASE);
-    addr = DS1338_ADDR;
-
-    qtest_add_func("/ds1338/tx-rx", send_and_receive);
-
-    ret = g_test_run();
-
-    qtest_quit(s);
-    g_free(i2c);
-
-    return ret;
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "address=0x68"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { DS1338_ADDR });
+
+    qos_node_create_driver("ds1338", i2c_device_create);
+    qos_node_consumes("ds1338", "i2c-bus", &opts);
+    qos_add_test("tx-rx", "ds1338", send_and_receive, NULL);
 }
+libqos_init(ds1338_register_nodes);
diff --git a/tests/libqos/arm-imx25-pdk-machine.c b/tests/libqos/arm-imx25-pdk-machine.c
new file mode 100644
index 0000000000..25066fb8a9
--- /dev/null
+++ b/tests/libqos/arm-imx25-pdk-machine.c
@@ -0,0 +1,92 @@
+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "libqos/malloc.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+
+#define ARM_PAGE_SIZE            4096
+#define IMX25_PDK_RAM_START      0x80000000
+#define IMX25_PDK_RAM_END        0x88000000
+
+typedef struct QIMX25PDKMachine QIMX25PDKMachine;
+
+struct QIMX25PDKMachine {
+    QOSGraphObject obj;
+    QGuestAllocator alloc;
+    IMXI2C i2c_1;
+};
+
+static void *imx25_pdk_get_driver(void *object, const char *interface)
+{
+    QIMX25PDKMachine *machine = object;
+    if (!g_strcmp0(interface, "memory")) {
+        return &machine->alloc;
+    }
+
+    fprintf(stderr, "%s not present in arm/imx25_pdk\n", interface);
+    g_assert_not_reached();
+}
+
+static QOSGraphObject *imx25_pdk_get_device(void *obj, const char *device)
+{
+    QIMX25PDKMachine *machine = obj;
+    if (!g_strcmp0(device, "imx.i2c")) {
+        return &machine->i2c_1.obj;
+    }
+
+    fprintf(stderr, "%s not present in arm/imx25_pdk\n", device);
+    g_assert_not_reached();
+}
+
+static void imx25_pdk_destructor(QOSGraphObject *obj)
+{
+    QIMX25PDKMachine *machine = (QIMX25PDKMachine *) obj;
+    alloc_destroy(&machine->alloc);
+}
+
+static void *qos_create_machine_arm_imx25_pdk(QTestState *qts)
+{
+    QIMX25PDKMachine *machine = g_new0(QIMX25PDKMachine, 1);
+
+    alloc_init(&machine->alloc, 0,
+               IMX25_PDK_RAM_START,
+               IMX25_PDK_RAM_END,
+               ARM_PAGE_SIZE);
+    machine->obj.get_device = imx25_pdk_get_device;
+    machine->obj.get_driver = imx25_pdk_get_driver;
+    machine->obj.destructor = imx25_pdk_destructor;
+
+    imx_i2c_init(&machine->i2c_1, qts, 0x43f80000);
+    return &machine->obj;
+}
+
+static void imx25_pdk_register_nodes(void)
+{
+    QOSGraphEdgeOptions edge = {
+        .extra_device_opts = "bus=i2c-bus.0"
+    };
+    qos_node_create_machine("arm/imx25-pdk", qos_create_machine_arm_imx25_pdk);
+    qos_node_contains("arm/imx25-pdk", "imx.i2c", &edge, NULL);
+}
+
+libqos_init(imx25_pdk_register_nodes);
diff --git a/tests/libqos/arm-n800-machine.c b/tests/libqos/arm-n800-machine.c
new file mode 100644
index 0000000000..87279bdb26
--- /dev/null
+++ b/tests/libqos/arm-n800-machine.c
@@ -0,0 +1,92 @@
+/*
+ * libqos driver framework
+ *
+ * Copyright (c) 2019 Red Hat, Inc.
+ *
+ * Author: Paolo Bonzini <pbonzini@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+#include "libqtest.h"
+#include "libqos/malloc.h"
+#include "libqos/qgraph.h"
+#include "libqos/i2c.h"
+
+#define ARM_PAGE_SIZE            4096
+#define N800_RAM_START      0x80000000
+#define N800_RAM_END        0x88000000
+
+typedef struct QN800Machine QN800Machine;
+
+struct QN800Machine {
+    QOSGraphObject obj;
+    QGuestAllocator alloc;
+    OMAPI2C i2c_1;
+};
+
+static void *n800_get_driver(void *object, const char *interface)
+{
+    QN800Machine *machine = object;
+    if (!g_strcmp0(interface, "memory")) {
+        return &machine->alloc;
+    }
+
+    fprintf(stderr, "%s not present in arm/n800\n", interface);
+    g_assert_not_reached();
+}
+
+static QOSGraphObject *n800_get_device(void *obj, const char *device)
+{
+    QN800Machine *machine = obj;
+    if (!g_strcmp0(device, "omap_i2c")) {
+        return &machine->i2c_1.obj;
+    }
+
+    fprintf(stderr, "%s not present in arm/n800\n", device);
+    g_assert_not_reached();
+}
+
+static void n800_destructor(QOSGraphObject *obj)
+{
+    QN800Machine *machine = (QN800Machine *) obj;
+    alloc_destroy(&machine->alloc);
+}
+
+static void *qos_create_machine_arm_n800(QTestState *qts)
+{
+    QN800Machine *machine = g_new0(QN800Machine, 1);
+
+    alloc_init(&machine->alloc, 0,
+               N800_RAM_START,
+               N800_RAM_END,
+               ARM_PAGE_SIZE);
+    machine->obj.get_device = n800_get_device;
+    machine->obj.get_driver = n800_get_driver;
+    machine->obj.destructor = n800_destructor;
+
+    omap_i2c_init(&machine->i2c_1, qts, 0x48070000);
+    return &machine->obj;
+}
+
+static void n800_register_nodes(void)
+{
+    QOSGraphEdgeOptions edge = {
+        .extra_device_opts = "bus=i2c-bus.0"
+    };
+    qos_node_create_machine("arm/n800", qos_create_machine_arm_n800);
+    qos_node_contains("arm/n800", "omap_i2c", &edge, NULL);
+}
+
+libqos_init(n800_register_nodes);
diff --git a/tests/libqos/i2c-imx.c b/tests/libqos/i2c-imx.c
index 0945f2ecdc..f33ece55a3 100644
--- a/tests/libqos/i2c-imx.c
+++ b/tests/libqos/i2c-imx.c
@@ -30,13 +30,6 @@ enum IMXI2CDirection {
     IMX_I2C_WRITE,
 };
 
-typedef struct IMXI2C {
-    I2CAdapter parent;
-
-    uint64_t addr;
-} IMXI2C;
-
-
 static void imx_i2c_set_slave_addr(IMXI2C *s, uint8_t addr,
                                    enum IMXI2CDirection direction)
 {
@@ -47,7 +40,7 @@ static void imx_i2c_set_slave_addr(IMXI2C *s, uint8_t addr,
 static void imx_i2c_send(I2CAdapter *i2c, uint8_t addr,
                          const uint8_t *buf, uint16_t len)
 {
-    IMXI2C *s = (IMXI2C *)i2c;
+    IMXI2C *s = container_of(i2c, IMXI2C, parent);
     uint8_t data;
     uint8_t status;
     uint16_t size = 0;
@@ -107,7 +100,7 @@ static void imx_i2c_send(I2CAdapter *i2c, uint8_t addr,
 static void imx_i2c_recv(I2CAdapter *i2c, uint8_t addr,
                          uint8_t *buf, uint16_t len)
 {
-    IMXI2C *s = (IMXI2C *)i2c;
+    IMXI2C *s = container_of(i2c, IMXI2C, parent);
     uint8_t data;
     uint8_t status;
     uint16_t size = 0;
@@ -193,16 +186,31 @@ static void imx_i2c_recv(I2CAdapter *i2c, uint8_t addr,
     g_assert((status & I2SR_IBB) == 0);
 }
 
-I2CAdapter *imx_i2c_create(QTestState *qts, uint64_t addr)
+static void *imx_i2c_get_driver(void *obj, const char *interface)
 {
-    IMXI2C *s = g_malloc0(sizeof(*s));
-    I2CAdapter *i2c = (I2CAdapter *)s;
+    IMXI2C *s = obj;
+    if (!g_strcmp0(interface, "i2c-bus")) {
+        return &s->parent;
+    }
+    fprintf(stderr, "%s not present in imx-i2c\n", interface);
+    g_assert_not_reached();
+}
 
+void imx_i2c_init(IMXI2C *s, QTestState *qts, uint64_t addr)
+{
     s->addr = addr;
 
-    i2c->send = imx_i2c_send;
-    i2c->recv = imx_i2c_recv;
-    i2c->qts = qts;
+    s->obj.get_driver = imx_i2c_get_driver;
 
-    return i2c;
+    s->parent.send = imx_i2c_send;
+    s->parent.recv = imx_i2c_recv;
+    s->parent.qts = qts;
 }
+
+static void imx_i2c_register_nodes(void)
+{
+    qos_node_create_driver("imx.i2c", NULL);
+    qos_node_produces("imx.i2c", "i2c-bus");
+}
+
+libqos_init(imx_i2c_register_nodes);
diff --git a/tests/libqos/i2c-omap.c b/tests/libqos/i2c-omap.c
index 1ef6e7b200..9ae8214fa8 100644
--- a/tests/libqos/i2c-omap.c
+++ b/tests/libqos/i2c-omap.c
@@ -40,12 +40,6 @@ enum OMAPI2CCONBits {
     OMAP_I2C_CON_I2C_EN = 1 << 15,
 };
 
-typedef struct OMAPI2C {
-    I2CAdapter parent;
-
-    uint64_t addr;
-} OMAPI2C;
-
 
 static void omap_i2c_set_slave_addr(OMAPI2C *s, uint8_t addr)
 {
@@ -59,7 +53,7 @@ static void omap_i2c_set_slave_addr(OMAPI2C *s, uint8_t addr)
 static void omap_i2c_send(I2CAdapter *i2c, uint8_t addr,
                           const uint8_t *buf, uint16_t len)
 {
-    OMAPI2C *s = (OMAPI2C *)i2c;
+    OMAPI2C *s = container_of(i2c, OMAPI2C, parent);
     uint16_t data;
 
     omap_i2c_set_slave_addr(s, addr);
@@ -103,8 +97,9 @@ static void omap_i2c_send(I2CAdapter *i2c, uint8_t addr,
 static void omap_i2c_recv(I2CAdapter *i2c, uint8_t addr,
                           uint8_t *buf, uint16_t len)
 {
-    OMAPI2C *s = (OMAPI2C *)i2c;
+    OMAPI2C *s = container_of(i2c, OMAPI2C, parent);
     uint16_t data, stat;
+    uint16_t orig_len = len;
 
     omap_i2c_set_slave_addr(s, addr);
 
@@ -116,16 +111,24 @@ static void omap_i2c_recv(I2CAdapter *i2c, uint8_t addr,
            OMAP_I2C_CON_STT |
            OMAP_I2C_CON_STP;
     qtest_writew(i2c->qts, s->addr + OMAP_I2C_CON, data);
-    data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_CON);
-    g_assert((data & OMAP_I2C_CON_STP) == 0);
 
     data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_STAT);
     g_assert((data & OMAP_I2C_STAT_NACK) == 0);
 
-    data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_CNT);
-    g_assert_cmpuint(data, ==, len);
-
     while (len > 0) {
+        data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_CON);
+        if (len <= 4) {
+            g_assert((data & OMAP_I2C_CON_STP) == 0);
+
+            data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_CNT);
+            g_assert_cmpuint(data, ==, orig_len);
+        } else {
+            g_assert((data & OMAP_I2C_CON_STP) != 0);
+
+            data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_CNT);
+            g_assert_cmpuint(data, ==, len - 4);
+        }
+
         data = qtest_readw(i2c->qts, s->addr + OMAP_I2C_STAT);
         g_assert((data & OMAP_I2C_STAT_RRDY) != 0);
         g_assert((data & OMAP_I2C_STAT_ROVR) == 0);
@@ -152,21 +155,42 @@ static void omap_i2c_recv(I2CAdapter *i2c, uint8_t addr,
     g_assert((data & OMAP_I2C_CON_STP) == 0);
 }
 
-I2CAdapter *omap_i2c_create(QTestState *qts, uint64_t addr)
+static void *omap_i2c_get_driver(void *obj, const char *interface)
+{
+    OMAPI2C *s = obj;
+    if (!g_strcmp0(interface, "i2c-bus")) {
+        return &s->parent;
+    }
+    fprintf(stderr, "%s not present in omap_i2c\n", interface);
+    g_assert_not_reached();
+}
+
+static void omap_i2c_start_hw(QOSGraphObject *object)
 {
-    OMAPI2C *s = g_malloc0(sizeof(*s));
-    I2CAdapter *i2c = (I2CAdapter *)s;
+    OMAPI2C *s = (OMAPI2C *) object;
     uint16_t data;
 
+    /* verify the mmio address by looking for a known signature */
+    data = qtest_readw(s->parent.qts, s->addr + OMAP_I2C_REV);
+    g_assert_cmphex(data, ==, 0x34);
+}
+
+void omap_i2c_init(OMAPI2C *s, QTestState *qts, uint64_t addr)
+{
     s->addr = addr;
 
-    i2c->send = omap_i2c_send;
-    i2c->recv = omap_i2c_recv;
-    i2c->qts = qts;
+    s->obj.get_driver = omap_i2c_get_driver;
+    s->obj.start_hw = omap_i2c_start_hw;
 
-    /* verify the mmio address by looking for a known signature */
-    data = qtest_readw(qts, addr + OMAP_I2C_REV);
-    g_assert_cmphex(data, ==, 0x34);
+    s->parent.send = omap_i2c_send;
+    s->parent.recv = omap_i2c_recv;
+    s->parent.qts = qts;
+}
 
-    return i2c;
+static void omap_i2c_register_nodes(void)
+{
+    qos_node_create_driver("omap_i2c", NULL);
+    qos_node_produces("omap_i2c", "i2c-bus");
 }
+
+libqos_init(omap_i2c_register_nodes);
diff --git a/tests/libqos/i2c.c b/tests/libqos/i2c.c
index 23bc2a3eb2..156114e745 100644
--- a/tests/libqos/i2c.c
+++ b/tests/libqos/i2c.c
@@ -10,14 +10,76 @@
 #include "libqos/i2c.h"
 #include "libqtest.h"
 
-void i2c_send(I2CAdapter *i2c, uint8_t addr,
-              const uint8_t *buf, uint16_t len)
+void i2c_send(QI2CDevice *i2cdev, const uint8_t *buf, uint16_t len)
 {
-    i2c->send(i2c, addr, buf, len);
+    i2cdev->bus->send(i2cdev->bus, i2cdev->addr, buf, len);
 }
 
-void i2c_recv(I2CAdapter *i2c, uint8_t addr,
-              uint8_t *buf, uint16_t len)
+void i2c_recv(QI2CDevice *i2cdev, uint8_t *buf, uint16_t len)
 {
-    i2c->recv(i2c, addr, buf, len);
+    i2cdev->bus->recv(i2cdev->bus, i2cdev->addr, buf, len);
+}
+
+void i2c_read_block(QI2CDevice *i2cdev, uint8_t reg,
+                    uint8_t *buf, uint16_t len)
+{
+    i2c_send(i2cdev, &reg, 1);
+    i2c_recv(i2cdev, buf, len);
+}
+
+void i2c_write_block(QI2CDevice *i2cdev, uint8_t reg,
+                     const uint8_t *buf, uint16_t len)
+{
+    uint8_t *cmd = g_malloc(len + 1);
+    cmd[0] = reg;
+    memcpy(&cmd[1], buf, len);
+    i2c_send(i2cdev, cmd, len + 1);
+    g_free(cmd);
+}
+
+uint8_t i2c_get8(QI2CDevice *i2cdev, uint8_t reg)
+{
+    uint8_t resp[1];
+    i2c_read_block(i2cdev, reg, resp, sizeof(resp));
+    return resp[0];
+}
+
+uint16_t i2c_get16(QI2CDevice *i2cdev, uint8_t reg)
+{
+    uint8_t resp[2];
+    i2c_read_block(i2cdev, reg, resp, sizeof(resp));
+    return (resp[0] << 8) | resp[1];
+}
+
+void i2c_set8(QI2CDevice *i2cdev, uint8_t reg, uint8_t value)
+{
+    i2c_write_block(i2cdev, reg, &value, 1);
+}
+
+void i2c_set16(QI2CDevice *i2cdev, uint8_t reg, uint16_t value)
+{
+    uint8_t data[2];
+
+    data[0] = value >> 8;
+    data[1] = value & 255;
+    i2c_write_block(i2cdev, reg, data, sizeof(data));
+}
+
+void *i2c_device_create(void *i2c_bus, QGuestAllocator *alloc, void *addr)
+{
+    QI2CDevice *i2cdev = g_new0(QI2CDevice, 1);
+
+    i2cdev->bus = i2c_bus;
+    if (addr) {
+        i2cdev->addr = ((QI2CAddress *)addr)->addr;
+    }
+    return &i2cdev->obj;
+}
+
+void add_qi2c_address(QOSGraphEdgeOptions *opts, QI2CAddress *addr)
+{
+    g_assert(addr);
+
+    opts->arg = addr;
+    opts->size_arg = sizeof(QI2CAddress);
 }
diff --git a/tests/libqos/i2c.h b/tests/libqos/i2c.h
index cc01358a9f..945b65b34c 100644
--- a/tests/libqos/i2c.h
+++ b/tests/libqos/i2c.h
@@ -10,6 +10,7 @@
 #define LIBQOS_I2C_H
 
 #include "libqtest.h"
+#include "libqos/qgraph.h"
 
 typedef struct I2CAdapter I2CAdapter;
 struct I2CAdapter {
@@ -21,17 +22,61 @@ struct I2CAdapter {
     QTestState *qts;
 };
 
-#define OMAP2_I2C_1_BASE 0x48070000
+typedef struct QI2CAddress QI2CAddress;
+struct QI2CAddress {
+    uint8_t addr;
+};
+
+typedef struct QI2CDevice QI2CDevice;
+struct QI2CDevice {
+    /*
+     * For now, all devices are simple enough that there is no need for
+     * them to define their own constructor and get_driver functions.
+     * Therefore, QOSGraphObject is included directly in QI2CDevice;
+     * the tests expect to get a QI2CDevice rather than doing something
+     * like obj->get_driver("i2c-device").
+     *
+     * In fact there is no i2c-device interface even, because there are
+     * no generic I2C tests).
+     */
+    QOSGraphObject obj;
+    I2CAdapter *bus;
+    uint8_t addr;
+};
+
+void *i2c_device_create(void *i2c_bus, QGuestAllocator *alloc, void *addr);
+void add_qi2c_address(QOSGraphEdgeOptions *opts, QI2CAddress *addr);
+
+void i2c_send(QI2CDevice *dev, const uint8_t *buf, uint16_t len);
+void i2c_recv(QI2CDevice *dev, uint8_t *buf, uint16_t len);
+
+void i2c_read_block(QI2CDevice *dev, uint8_t reg,
+                    uint8_t *buf, uint16_t len);
+void i2c_write_block(QI2CDevice *dev, uint8_t reg,
+                     const uint8_t *buf, uint16_t len);
+uint8_t i2c_get8(QI2CDevice *dev, uint8_t reg);
+uint16_t i2c_get16(QI2CDevice *dev, uint8_t reg);
+void i2c_set8(QI2CDevice *dev, uint8_t reg, uint8_t value);
+void i2c_set16(QI2CDevice *dev, uint8_t reg, uint16_t value);
+
+/* i2c-omap.c */
+typedef struct OMAPI2C {
+    QOSGraphObject obj;
+    I2CAdapter parent;
+
+    uint64_t addr;
+} OMAPI2C;
+
+void omap_i2c_init(OMAPI2C *s, QTestState *qts, uint64_t addr);
 
-void i2c_send(I2CAdapter *i2c, uint8_t addr,
-              const uint8_t *buf, uint16_t len);
-void i2c_recv(I2CAdapter *i2c, uint8_t addr,
-              uint8_t *buf, uint16_t len);
+/* i2c-imx.c */
+typedef struct IMXI2C {
+    QOSGraphObject obj;
+    I2CAdapter parent;
 
-/* libi2c-omap.c */
-I2CAdapter *omap_i2c_create(QTestState *qts, uint64_t addr);
+    uint64_t addr;
+} IMXI2C;
 
-/* libi2c-imx.c */
-I2CAdapter *imx_i2c_create(QTestState *qts, uint64_t addr);
+void imx_i2c_init(IMXI2C *s, QTestState *qts, uint64_t addr);
 
 #endif
diff --git a/tests/libqos/qgraph.c b/tests/libqos/qgraph.c
index b149caaaa9..7a7ae2a19e 100644
--- a/tests/libqos/qgraph.c
+++ b/tests/libqos/qgraph.c
@@ -632,15 +632,19 @@ void qos_node_create_driver(const char *name, QOSCreateDriverFunc function)
 }
 
 void qos_node_contains(const char *container, const char *contained,
-                       ...)
+                       QOSGraphEdgeOptions *opts, ...)
 {
     va_list va;
-    va_start(va, contained);
-    QOSGraphEdgeOptions *opts;
 
+    if (opts == NULL) {
+        add_edge(container, contained, QEDGE_CONTAINS, NULL);
+        return;
+    }
+
+    va_start(va, opts);
     do {
-        opts = va_arg(va, QOSGraphEdgeOptions *);
         add_edge(container, contained, QEDGE_CONTAINS, opts);
+        opts = va_arg(va, QOSGraphEdgeOptions *);
     } while (opts != NULL);
 
     va_end(va);
diff --git a/tests/libqos/qgraph.h b/tests/libqos/qgraph.h
index e799095b30..3a25dda4b2 100644
--- a/tests/libqos/qgraph.h
+++ b/tests/libqos/qgraph.h
@@ -453,14 +453,16 @@ void qos_node_create_machine_args(const char *name,
 void qos_node_create_driver(const char *name, QOSCreateDriverFunc function);
 
 /**
- * qos_node_contains(): creates an edge of type QEDGE_CONTAINS and
- * adds it to the edge list mapped to @container in the
+ * qos_node_contains(): creates one or more edges of type QEDGE_CONTAINS
+ * and adds them to the edge list mapped to @container in the
  * edge hash table.
  *
- * This edge will have @container as source and @contained as destination.
+ * The edges will have @container as source and @contained as destination.
  *
- * It also has the possibility to add optional NULL-terminated
- * @opts parameters (see %QOSGraphEdgeOptions)
+ * If @opts is NULL, a single edge will be added with no options.
+ * If @opts is non-NULL, the arguments after @contained represent a
+ * NULL-terminated list of %QOSGraphEdgeOptions structs, and an
+ * edge will be added for each of them.
  *
  * This function can be useful when there are multiple devices
  * with the same node name contained in a machine/other node
@@ -480,7 +482,8 @@ void qos_node_create_driver(const char *name, QOSCreateDriverFunc function);
  * For contains, op1.arg and op1.size_arg represent the arg to pass
  * to @contained constructor to properly initialize it.
  */
-void qos_node_contains(const char *container, const char *contained, ...);
+void qos_node_contains(const char *container, const char *contained,
+                       QOSGraphEdgeOptions *opts, ...);
 
 /**
  * qos_node_produces(): creates an edge of type QEDGE_PRODUCES and
diff --git a/tests/pca9552-test.c b/tests/pca9552-test.c
index 5466a67ed7..4b800d3c3e 100644
--- a/tests/pca9552-test.c
+++ b/tests/pca9552-test.c
@@ -10,107 +10,84 @@
 #include "qemu/osdep.h"
 
 #include "libqtest.h"
+#include "libqos/qgraph.h"
 #include "libqos/i2c.h"
 #include "hw/misc/pca9552_regs.h"
 
 #define PCA9552_TEST_ID   "pca9552-test"
 #define PCA9552_TEST_ADDR 0x60
 
-static I2CAdapter *i2c;
-
-static uint8_t pca9552_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
+static void pca9552_init(QI2CDevice *i2cdev)
 {
-    uint8_t resp[1];
-    i2c_send(i2c, addr, &reg, 1);
-    i2c_recv(i2c, addr, resp, 1);
-    return resp[0];
+    /* Switch on LEDs 0 and 12 */
+    i2c_set8(i2cdev, PCA9552_LS0, 0x54);
+    i2c_set8(i2cdev, PCA9552_LS3, 0x54);
 }
 
-static void pca9552_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
-                         uint8_t value)
-{
-    uint8_t cmd[2];
-    uint8_t resp[1];
-
-    cmd[0] = reg;
-    cmd[1] = value;
-    i2c_send(i2c, addr, cmd, 2);
-    i2c_recv(i2c, addr, resp, 1);
-    g_assert_cmphex(resp[0], ==, cmd[1]);
-}
-
-static void receive_autoinc(void)
+static void receive_autoinc(void *obj, void *data, QGuestAllocator *alloc)
 {
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
     uint8_t resp;
     uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
 
-    i2c_send(i2c, PCA9552_TEST_ADDR, &reg, 1);
+    pca9552_init(i2cdev);
+
+    i2c_send(i2cdev, &reg, 1);
 
     /* PCA9552_LS0 */
-    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    i2c_recv(i2cdev, &resp, 1);
     g_assert_cmphex(resp, ==, 0x54);
 
     /* PCA9552_LS1 */
-    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    i2c_recv(i2cdev, &resp, 1);
     g_assert_cmphex(resp, ==, 0x55);
 
     /* PCA9552_LS2 */
-    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    i2c_recv(i2cdev, &resp, 1);
     g_assert_cmphex(resp, ==, 0x55);
 
     /* PCA9552_LS3 */
-    i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
+    i2c_recv(i2cdev, &resp, 1);
     g_assert_cmphex(resp, ==, 0x54);
 }
 
-static void send_and_receive(void)
+static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
 {
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
     uint8_t value;
 
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
+    value = i2c_get8(i2cdev, PCA9552_LS0);
     g_assert_cmphex(value, ==, 0x55);
 
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
+    value = i2c_get8(i2cdev, PCA9552_INPUT0);
     g_assert_cmphex(value, ==, 0x0);
 
-    /* Switch on LED 0 */
-    pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0, 0x54);
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
+    pca9552_init(i2cdev);
+
+    value = i2c_get8(i2cdev, PCA9552_LS0);
     g_assert_cmphex(value, ==, 0x54);
 
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
+    value = i2c_get8(i2cdev, PCA9552_INPUT0);
     g_assert_cmphex(value, ==, 0x01);
 
-    /* Switch on LED 12 */
-    pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3, 0x54);
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3);
+    value = i2c_get8(i2cdev, PCA9552_LS3);
     g_assert_cmphex(value, ==, 0x54);
 
-    value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT1);
+    value = i2c_get8(i2cdev, PCA9552_INPUT1);
     g_assert_cmphex(value, ==, 0x10);
 }
 
-int main(int argc, char **argv)
+static void pca9552_register_nodes(void)
 {
-    QTestState *s = NULL;
-    int ret;
-
-    g_test_init(&argc, &argv, NULL);
-
-    s = qtest_start("-machine n800 "
-                    "-device pca9552,bus=i2c-bus.0,id=" PCA9552_TEST_ID
-                    ",address=0x60");
-    i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
-
-    qtest_add_func("/pca9552/tx-rx", send_and_receive);
-    qtest_add_func("/pca9552/rx-autoinc", receive_autoinc);
-
-    ret = g_test_run();
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "address=0x60"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { 0x60 });
 
-    if (s) {
-        qtest_quit(s);
-    }
-    g_free(i2c);
+    qos_node_create_driver("pca9552", i2c_device_create);
+    qos_node_consumes("pca9552", "i2c-bus", &opts);
 
-    return ret;
+    qos_add_test("tx-rx", "pca9552", send_and_receive, NULL);
+    qos_add_test("rx-autoinc", "pca9552", receive_autoinc, NULL);
 }
+libqos_init(pca9552_register_nodes);
diff --git a/tests/qos-test.c b/tests/qos-test.c
index ae2fb5de1c..01b2a22c08 100644
--- a/tests/qos-test.c
+++ b/tests/qos-test.c
@@ -340,7 +340,8 @@ static void walk_path(QOSGraphNode *orig_path, int len)
     char **path_vec = g_new0(char *, (QOS_PATH_MAX_ELEMENT_SIZE * 2));
     int path_vec_size = 0;
 
-    char *after_cmd = NULL, *before_cmd = NULL, *after_device = NULL;
+    char *after_cmd, *before_cmd, *after_device;
+    GString *after_device_str = g_string_new("");
     char *node_name = orig_path->name, *path_str;
 
     GString *cmd_line = g_string_new("");
@@ -363,9 +364,8 @@ static void walk_path(QOSGraphNode *orig_path, int len)
         /* append node command line + previous edge command line */
         if (path->command_line && etype == QEDGE_CONSUMED_BY) {
             g_string_append(cmd_line, path->command_line);
-            if (after_device) {
-                g_string_append(cmd_line, after_device);
-            }
+            g_string_append(cmd_line, after_device_str->str);
+            g_string_truncate(after_device_str, 0);
         }
 
         path_vec[path_vec_size++] = qos_graph_edge_get_name(path->path_edge);
@@ -382,12 +382,15 @@ static void walk_path(QOSGraphNode *orig_path, int len)
         if (after_cmd) {
             g_string_append(cmd_line2, after_cmd);
         }
+        if (after_device) {
+            g_string_append(after_device_str, after_device);
+        }
     }
 
     path_vec[path_vec_size++] = NULL;
-    if (after_device) {
-        g_string_append(cmd_line, after_device);
-    }
+    g_string_append(cmd_line, after_device_str->str);
+    g_string_free(after_device_str, true);
+
     g_string_append(cmd_line, cmd_line2->str);
     g_string_free(cmd_line2, true);
 
diff --git a/tests/test-thread-pool.c b/tests/test-thread-pool.c
index 9cdccb3a47..0b675923f6 100644
--- a/tests/test-thread-pool.c
+++ b/tests/test-thread-pool.c
@@ -27,9 +27,10 @@ static int worker_cb(void *opaque)
 static int long_cb(void *opaque)
 {
     WorkerTestData *data = opaque;
-    atomic_inc(&data->n);
-    g_usleep(2000000);
-    atomic_inc(&data->n);
+    if (atomic_cmpxchg(&data->n, 0, 1) == 0) {
+        g_usleep(2000000);
+        atomic_or(&data->n, 2);
+    }
     return 0;
 }
 
@@ -171,7 +172,7 @@ static void do_test_cancel(bool sync)
     /* Cancel the jobs that haven't been started yet.  */
     num_canceled = 0;
     for (i = 0; i < 100; i++) {
-        if (atomic_cmpxchg(&data[i].n, 0, 3) == 0) {
+        if (atomic_cmpxchg(&data[i].n, 0, 4) == 0) {
             data[i].ret = -ECANCELED;
             if (sync) {
                 bdrv_aio_cancel(data[i].aiocb);
@@ -185,7 +186,7 @@ static void do_test_cancel(bool sync)
     g_assert_cmpint(num_canceled, <, 100);
 
     for (i = 0; i < 100; i++) {
-        if (data[i].aiocb && data[i].n != 3) {
+        if (data[i].aiocb && atomic_read(&data[i].n) < 4) {
             if (sync) {
                 /* Canceling the others will be a blocking operation.  */
                 bdrv_aio_cancel(data[i].aiocb);
@@ -201,13 +202,22 @@ static void do_test_cancel(bool sync)
     }
     g_assert_cmpint(active, ==, 0);
     for (i = 0; i < 100; i++) {
-        if (data[i].n == 3) {
+        g_assert(data[i].aiocb == NULL);
+        switch (data[i].n) {
+        case 0:
+            fprintf(stderr, "Callback not canceled but never started?\n");
+            abort();
+        case 3:
+            /* Couldn't be canceled asynchronously, must have completed.  */
+            g_assert_cmpint(data[i].ret, ==, 0);
+            break;
+        case 4:
+            /* Could be canceled asynchronously, never started.  */
             g_assert_cmpint(data[i].ret, ==, -ECANCELED);
-            g_assert(data[i].aiocb == NULL);
-        } else {
-            g_assert_cmpint(data[i].n, ==, 2);
-            g_assert(data[i].ret == 0 || data[i].ret == -ECANCELED);
-            g_assert(data[i].aiocb == NULL);
+            break;
+        default:
+            fprintf(stderr, "Callback aborted while running?\n");
+            abort();
         }
     }
 }
diff --git a/tests/tmp105-test.c b/tests/tmp105-test.c
index 34cae7a582..f599309a4a 100644
--- a/tests/tmp105-test.c
+++ b/tests/tmp105-test.c
@@ -10,6 +10,7 @@
 #include "qemu/osdep.h"
 
 #include "libqtest.h"
+#include "libqos/qgraph.h"
 #include "libqos/i2c.h"
 #include "qapi/qmp/qdict.h"
 #include "hw/misc/tmp105_regs.h"
@@ -17,52 +18,6 @@
 #define TMP105_TEST_ID   "tmp105-test"
 #define TMP105_TEST_ADDR 0x49
 
-static I2CAdapter *i2c;
-
-static uint16_t tmp105_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
-{
-    uint8_t resp[1];
-    i2c_send(i2c, addr, &reg, 1);
-    i2c_recv(i2c, addr, resp, 1);
-    return resp[0];
-}
-
-static uint16_t tmp105_get16(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
-{
-    uint8_t resp[2];
-    i2c_send(i2c, addr, &reg, 1);
-    i2c_recv(i2c, addr, resp, 2);
-    return (resp[0] << 8) | resp[1];
-}
-
-static void tmp105_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
-                        uint8_t value)
-{
-    uint8_t cmd[2];
-    uint8_t resp[1];
-
-    cmd[0] = reg;
-    cmd[1] = value;
-    i2c_send(i2c, addr, cmd, 2);
-    i2c_recv(i2c, addr, resp, 1);
-    g_assert_cmphex(resp[0], ==, cmd[1]);
-}
-
-static void tmp105_set16(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
-                         uint16_t value)
-{
-    uint8_t cmd[3];
-    uint8_t resp[2];
-
-    cmd[0] = reg;
-    cmd[1] = value >> 8;
-    cmd[2] = value & 255;
-    i2c_send(i2c, addr, cmd, 3);
-    i2c_recv(i2c, addr, resp, 2);
-    g_assert_cmphex(resp[0], ==, cmd[1]);
-    g_assert_cmphex(resp[1], ==, cmd[2]);
-}
-
 static int qmp_tmp105_get_temperature(const char *id)
 {
     QDict *response;
@@ -87,21 +42,22 @@ static void qmp_tmp105_set_temperature(const char *id, int value)
 }
 
 #define TMP105_PRECISION (1000/16)
-static void send_and_receive(void)
+static void send_and_receive(void *obj, void *data, QGuestAllocator *alloc)
 {
     uint16_t value;
+    QI2CDevice *i2cdev = (QI2CDevice *)obj;
 
     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
     g_assert_cmpuint(value, ==, 0);
 
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0);
 
     qmp_tmp105_set_temperature(TMP105_TEST_ID, 20000);
     value = qmp_tmp105_get_temperature(TMP105_TEST_ID);
     g_assert_cmpuint(value, ==, 20000);
 
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x1400);
 
     qmp_tmp105_set_temperature(TMP105_TEST_ID, 20938); /* 20 + 15/16 */
@@ -110,24 +66,27 @@ static void send_and_receive(void)
     g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
 
     /* Set config */
-    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
-    value = tmp105_get8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG);
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x60);
+    value = i2c_get8(i2cdev, TMP105_REG_CONFIG);
     g_assert_cmphex(value, ==, 0x60);
 
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x14f0);
 
     /* Set precision to 9, 10, 11 bits.  */
-    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x00);
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x00);
+    g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x00);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x1480);
 
-    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x20);
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x20);
+    g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x20);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x14c0);
 
-    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x40);
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x40);
+    g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x40);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x14e0);
 
     /* stored precision remains the same */
@@ -135,32 +94,27 @@ static void send_and_receive(void)
     g_assert_cmpuint(value, >=, 20938 - TMP105_PRECISION/2);
     g_assert_cmpuint(value, <, 20938 + TMP105_PRECISION/2);
 
-    tmp105_set8(i2c, TMP105_TEST_ADDR, TMP105_REG_CONFIG, 0x60);
-    value = tmp105_get16(i2c, TMP105_TEST_ADDR, TMP105_REG_TEMPERATURE);
+    i2c_set8(i2cdev, TMP105_REG_CONFIG, 0x60);
+    g_assert_cmphex(i2c_get8(i2cdev, TMP105_REG_CONFIG), ==, 0x60);
+    value = i2c_get16(i2cdev, TMP105_REG_TEMPERATURE);
     g_assert_cmphex(value, ==, 0x14f0);
 
-    tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_LOW, 0x1234);
-    tmp105_set16(i2c, TMP105_TEST_ADDR, TMP105_REG_T_HIGH, 0x4231);
+    i2c_set16(i2cdev, TMP105_REG_T_LOW, 0x1234);
+    g_assert_cmphex(i2c_get16(i2cdev, TMP105_REG_T_LOW), ==, 0x1234);
+    i2c_set16(i2cdev, TMP105_REG_T_HIGH, 0x4231);
+    g_assert_cmphex(i2c_get16(i2cdev, TMP105_REG_T_HIGH), ==, 0x4231);
 }
 
-int main(int argc, char **argv)
+static void tmp105_register_nodes(void)
 {
-    QTestState *s = NULL;
-    int ret;
-
-    g_test_init(&argc, &argv, NULL);
+    QOSGraphEdgeOptions opts = {
+        .extra_device_opts = "id=" TMP105_TEST_ID ",address=0x49"
+    };
+    add_qi2c_address(&opts, &(QI2CAddress) { 0x49 });
 
-    s = qtest_start("-machine n800 "
-                    "-device tmp105,bus=i2c-bus.0,id=" TMP105_TEST_ID
-                    ",address=0x49");
-    i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
+    qos_node_create_driver("tmp105", i2c_device_create);
+    qos_node_consumes("tmp105", "i2c-bus", &opts);
 
-    qtest_add_func("/tmp105/tx-rx", send_and_receive);
-
-    ret = g_test_run();
-
-    qtest_quit(s);
-    g_free(i2c);
-
-    return ret;
+    qos_add_test("tx-rx", "tmp105", send_and_receive, NULL);
 }
+libqos_init(tmp105_register_nodes);