diff options
Diffstat (limited to 'hw/misc/vfio.c')
| -rw-r--r-- | hw/misc/vfio.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c index 22ebcbd796..d66f3d2425 100644 --- a/hw/misc/vfio.c +++ b/hw/misc/vfio.c @@ -1250,7 +1250,13 @@ static void vfio_pci_load_rom(VFIODevice *vdev) static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size) { VFIODevice *vdev = opaque; - uint64_t val = ((uint64_t)1 << (size * 8)) - 1; + union { + uint8_t byte; + uint16_t word; + uint32_t dword; + uint64_t qword; + } val; + uint64_t data = 0; /* Load the ROM lazily when the guest tries to read it */ if (unlikely(!vdev->rom && !vdev->rom_read_failed)) { @@ -1260,11 +1266,26 @@ static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size) memcpy(&val, vdev->rom + addr, (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0); + switch (size) { + case 1: + data = val.byte; + break; + case 2: + data = le16_to_cpu(val.word); + break; + case 4: + data = le32_to_cpu(val.dword); + break; + default: + hw_error("vfio: unsupported read size, %d bytes\n", size); + break; + } + DPRINTF("%s(%04x:%02x:%02x.%x, 0x%"HWADDR_PRIx", 0x%x) = 0x%"PRIx64"\n", __func__, vdev->host.domain, vdev->host.bus, vdev->host.slot, - vdev->host.function, addr, size, val); + vdev->host.function, addr, size, data); - return val; + return data; } static void vfio_rom_write(void *opaque, hwaddr addr, |