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| author | Phil Dennis-Jordan <phil@philjordan.eu> | 2024-12-27 13:13:33 +0100 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2025-01-13 17:21:46 +0100 |
| commit | ef82ab692424c7fb42c3aeb6b65db68eade6213a (patch) | |
| tree | f9e5769e1487be2331ea5f9757738d6ba6b89aeb /hw/i2c | |
| parent | bb5b7fced6b5d3334ab20702fc846e47bb1fb731 (diff) | |
| download | focaccia-qemu-ef82ab692424c7fb42c3aeb6b65db68eade6213a.tar.gz focaccia-qemu-ef82ab692424c7fb42c3aeb6b65db68eade6213a.zip | |
hw/usb/hcd-xhci-pci: Use event ring 0 if mapping unsupported
The XHCI specification, section 4.17.1 specifies that "If the Number of Interrupters (MaxIntrs) field is greater than 1, then Interrupter Mapping shall be supported." and "If Interrupter Mapping is not supported, the Interrupter Target field shall be ignored by the xHC and all Events targeted at Interrupter 0." QEMU's XHCI device has so far not specially addressed this case, so we add a check to xhci_event() to redirect to event ring and interrupt 0 if mapping is disabled. Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-ID: <20241227121336.25838-4-phil@philjordan.eu> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'hw/i2c')
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