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author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2014-09-22 15:26:36 -0600 |
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committer | Alex Williamson <alex.williamson@redhat.com> | 2014-09-22 15:26:36 -0600 |
commit | 6758008e2c4e79fb6bd04fe8e7a41665fa583965 (patch) | |
tree | 03e64c162683c0a159d9f83c17a14f5f9bc30fc6 /hw | |
parent | 07e2863d0271ac6c05206d8ce9e4f4c39b25d3ea (diff) | |
download | qemu-6758008e2c4e79fb6bd04fe8e7a41665fa583965.zip qemu-6758008e2c4e79fb6bd04fe8e7a41665fa583965.tar.gz qemu-6758008e2c4e79fb6bd04fe8e7a41665fa583965.tar.bz2 |
Revert "vfio: Make BARs native endian"
This reverts commit c40708176a6b52b73bec14796b7c71b882ceb102.
The resulting code wrongly assumed target and host endianness are
the same which is not always the case for PPC64.
[aw: or potentially any host supporting VFIO and TCG]
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/misc/vfio.c | 41 |
1 files changed, 10 insertions, 31 deletions
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c index 40dcaa6..22ebcbd 100644 --- a/hw/misc/vfio.c +++ b/hw/misc/vfio.c @@ -1098,10 +1098,10 @@ static void vfio_bar_write(void *opaque, hwaddr addr, buf.byte = data; break; case 2: - buf.word = data; + buf.word = cpu_to_le16(data); break; case 4: - buf.dword = data; + buf.dword = cpu_to_le32(data); break; default: hw_error("vfio: unsupported write size, %d bytes", size); @@ -1158,10 +1158,10 @@ static uint64_t vfio_bar_read(void *opaque, data = buf.byte; break; case 2: - data = buf.word; + data = le16_to_cpu(buf.word); break; case 4: - data = buf.dword; + data = le32_to_cpu(buf.dword); break; default: hw_error("vfio: unsupported read size, %d bytes", size); @@ -1188,7 +1188,7 @@ static uint64_t vfio_bar_read(void *opaque, static const MemoryRegionOps vfio_bar_ops = { .read = vfio_bar_read, .write = vfio_bar_write, - .endianness = DEVICE_NATIVE_ENDIAN, + .endianness = DEVICE_LITTLE_ENDIAN, }; static void vfio_pci_load_rom(VFIODevice *vdev) @@ -1250,42 +1250,21 @@ static void vfio_pci_load_rom(VFIODevice *vdev) static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size) { VFIODevice *vdev = opaque; - union { - uint8_t byte; - uint16_t word; - uint32_t dword; - uint64_t qword; - } buf; - uint64_t data = 0; + uint64_t val = ((uint64_t)1 << (size * 8)) - 1; /* Load the ROM lazily when the guest tries to read it */ if (unlikely(!vdev->rom && !vdev->rom_read_failed)) { vfio_pci_load_rom(vdev); } - memcpy(&buf, vdev->rom + addr, + memcpy(&val, vdev->rom + addr, (addr < vdev->rom_size) ? MIN(size, vdev->rom_size - addr) : 0); - switch (size) { - case 1: - data = buf.byte; - break; - case 2: - data = buf.word; - break; - case 4: - data = buf.dword; - break; - default: - hw_error("vfio: unsupported read size, %d bytes", 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, data); + vdev->host.function, addr, size, val); - return data; + return val; } static void vfio_rom_write(void *opaque, hwaddr addr, @@ -1296,7 +1275,7 @@ static void vfio_rom_write(void *opaque, hwaddr addr, static const MemoryRegionOps vfio_rom_ops = { .read = vfio_rom_read, .write = vfio_rom_write, - .endianness = DEVICE_NATIVE_ENDIAN, + .endianness = DEVICE_LITTLE_ENDIAN, }; static bool vfio_blacklist_opt_rom(VFIODevice *vdev) |