According to xHCI spec rev 1.2, unaligned access to xHCI Host Controller Capability Registers is not prohibited. In addition, the limit of access size is also unspecified. Actually, some real devices allow unaligned access and 8-byte access to these registers.
This commit makes it possible to unaligned access and 8-byte access to Host Controller Capability Registers. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/143 Signed-off-by: Tomoyuki HIROSE <tomoyuki.hir...@igel.co.jp> --- hw/usb/hcd-xhci.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index d85adaca0d..f35cbe526f 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -3165,9 +3165,11 @@ static const MemoryRegionOps xhci_cap_ops = { .read = xhci_cap_read, .write = xhci_cap_write, .valid.min_access_size = 1, - .valid.max_access_size = 4, + .valid.max_access_size = 8, + .valid.unaligned = true, .impl.min_access_size = 4, .impl.max_access_size = 4, + .impl.unaligned = false, .endianness = DEVICE_LITTLE_ENDIAN, }; -- 2.43.0
