[Qemu-devel] [PATCH] hw: Add test device for unittests execution

[Lucas Meneghel Rodrigues <lmr@redhat.com>]

Add a test device which supports the kvmctl ioports,
for running the KVM test suite. This is a straight
port from the latest version of the test device present
on qemu-kvm, using the APIs currently in use by qemu.

With this we aim for daily execution of
the KVM unittests to capture any problems with the
KVM interface.

Usage:

  qemu
     -chardev file,path=/log/file/some/where,id=testlog
     -device testdev,chardev=testlog

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
---
 Makefile.target |    1 +
 hw/testdev.c    |  140 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 141 insertions(+), 0 deletions(-)
 create mode 100644 hw/testdev.c

diff --git a/Makefile.target b/Makefile.target
index e280bf6..e095dd5 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -232,6 +232,7 @@ obj-i386-y += debugcon.o multiboot.o
 obj-i386-y += pc_piix.o
 obj-i386-$(CONFIG_KVM) += kvmclock.o
 obj-i386-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
+obj-i386-y += testdev.o
 
 # shared objects
 obj-ppc-y = ppc.o
diff --git a/hw/testdev.c b/hw/testdev.c
new file mode 100644
index 0000000..e38c20e
--- /dev/null
+++ b/hw/testdev.c
@@ -0,0 +1,140 @@
+#include <sys/mman.h>
+#include "hw.h"
+#include "qdev.h"
+#include "isa.h"
+
+struct testdev {
+    ISADevice dev;
+    CharDriverState *chr;
+};
+
+static void test_device_serial_write(void *opaque, uint32_t addr, uint32_t data)
+{
+    struct testdev *dev = opaque;
+    uint8_t buf[1] = { data };
+
+    if (dev->chr) {
+        qemu_chr_fe_write(dev->chr, buf, 1);
+    }
+}
+
+static void test_device_exit(void *opaque, uint32_t addr, uint32_t data)
+{
+    exit(data);
+}
+
+static uint32_t test_device_memsize_read(void *opaque, uint32_t addr)
+{
+    return ram_size;
+}
+
+static void test_device_irq_line(void *opaque, uint32_t addr, uint32_t data)
+{
+    qemu_set_irq(isa_get_irq(addr - 0x2000), !!data);
+}
+
+static uint32 test_device_ioport_data;
+
+static void test_device_ioport_write(void *opaque, uint32_t addr, uint32_t data)
+{
+    test_device_ioport_data = data;
+}
+
+static uint32_t test_device_ioport_read(void *opaque, uint32_t addr)
+{
+    return test_device_ioport_data;
+}
+
+static void test_device_flush_page(void *opaque, uint32_t addr, uint32_t data)
+{
+    target_phys_addr_t len = 4096;
+    void *a = cpu_physical_memory_map(data & ~0xffful, &len, 0);
+
+    mprotect(a, 4096, PROT_NONE);
+    mprotect(a, 4096, PROT_READ|PROT_WRITE);
+    cpu_physical_memory_unmap(a, len, 0, 0);
+}
+
+static char *iomem_buf;
+
+static uint32_t test_iomem_readb(void *opaque, target_phys_addr_t addr)
+{
+    return iomem_buf[addr];
+}
+
+static uint32_t test_iomem_readw(void *opaque, target_phys_addr_t addr)
+{
+    return *(uint16_t*)(iomem_buf + addr);
+}
+
+static uint32_t test_iomem_readl(void *opaque, target_phys_addr_t addr)
+{
+    return *(uint32_t*)(iomem_buf + addr);
+}
+
+static void test_iomem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    iomem_buf[addr] = val;
+}
+
+static void test_iomem_writew(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    *(uint16_t*)(iomem_buf + addr) = val;
+}
+
+static void test_iomem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+{
+    *(uint32_t*)(iomem_buf + addr) = val;
+}
+
+static CPUReadMemoryFunc * const test_iomem_read[3] = {
+    test_iomem_readb,
+    test_iomem_readw,
+    test_iomem_readl,
+};
+
+static CPUWriteMemoryFunc * const test_iomem_write[3] = {
+    test_iomem_writeb,
+    test_iomem_writew,
+    test_iomem_writel,
+};
+
+static int init_test_device(ISADevice *isa)
+{
+    struct testdev *dev = DO_UPCAST(struct testdev, dev, isa);
+    int iomem;
+
+    register_ioport_write(0xf1, 1, 1, test_device_serial_write, dev);
+    register_ioport_write(0xf4, 1, 4, test_device_exit, dev);
+    register_ioport_read(0xd1, 1, 4, test_device_memsize_read, dev);
+    register_ioport_read(0xe0, 1, 1, test_device_ioport_read, dev);
+    register_ioport_write(0xe0, 1, 1, test_device_ioport_write, dev);
+    register_ioport_read(0xe0, 1, 2, test_device_ioport_read, dev);
+    register_ioport_write(0xe0, 1, 2, test_device_ioport_write, dev);
+    register_ioport_read(0xe0, 1, 4, test_device_ioport_read, dev);
+    register_ioport_write(0xe0, 1, 4, test_device_ioport_write, dev);
+    register_ioport_write(0xe4, 1, 4, test_device_flush_page, dev);
+    register_ioport_write(0x2000, 24, 1, test_device_irq_line, NULL);
+    iomem_buf = g_malloc0(0x10000);
+    iomem = cpu_register_io_memory(test_iomem_read, test_iomem_write, NULL,
+                                   DEVICE_NATIVE_ENDIAN);
+    cpu_register_physical_memory(0xff000000, 0x10000, iomem);
+    return 0;
+}
+
+static ISADeviceInfo testdev_info = {
+    .qdev.name  = "testdev",
+    .qdev.size  = sizeof(struct testdev),
+    .init       = init_test_device,
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_CHR("chardev", struct testdev, chr),
+        DEFINE_PROP_END_OF_LIST(),
+    },
+};
+
+static void testdev_register_devices(void)
+{
+    isa_qdev_register(&testdev_info);
+}
+
+device_init(testdev_register_devices)
-- 
1.7.6