pci_min driver

kernel_module/README.md

@@ -26,6 +26,7 @@
         1. [dep2](dep2.c)
     1.  [character_device](character_device.c)
     1.  Hardware device drivers
+        1. [pci_min](pci_min.c)
         1. [pci](pci.c)
         1. [platform_device](platform_device.c)
 1.  [user](user/)

kernel_module/pci_min.c

@@ -2,6 +2,8 @@
 Only tested in x86.
 
 PCI driver for our minimal pci_min.c QEMU fork device.
+
+probe already does a mmio write, which generates an IRQ and tests everything.
 */
 
 #include <asm/uaccess.h>

kernel_module/platform_device.c

@@ -77,8 +77,8 @@ static int lkmc_platform_device_probe(struct platform_device *pdev)
 		dev_err(dev, "of_iomap");
 		return -EINVAL;
 	}
-	dev_info(dev, "res.start = %u resource_size = %llx\n",
-			res.start, (unsigned long long)resource_size(&res));
+	dev_info(dev, "res.start = %llx resource_size = %llx\n",
+			(unsigned long long)res.start, (unsigned long long)resource_size(&res));
 
 	/* Test MMIO and IRQ. */
 	iowrite32(0x12345678, map);

run

@@ -44,6 +44,7 @@ env \
   HOST_QEMU_OPTS="--enable-debug --enable-sdl --extra-cflags='-DDEBUG_PL061=1' --with-sdlabi=2.0" \
   host-qemu-rebuild \
   linux-rebuild \
+  kernel_module-rebuild \
   all \
 ;
 cd ..

runqemu

@@ -63,6 +63,7 @@ case "$arch" in
       -M pc \
       -append 'root=/dev/vda $extra_append' \
       -device edu \
+      -device lkmc_pci_min \
       -drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \
       -kernel ${images_dir}/bzImage \
       -net nic,model=virtio \