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This change addresses an edge case that trips up macOS guest drivers for PCI based XHCI controllers. The guest driver would attempt to schedule events to XHCI event rings 1 and 2 even when using PCI pin-based interrupts. Interrupts would therefore be dropped, and events only handled on timeout. So, in addition to disabling interrupter mapping if numintrs is 1, a callback is added to xhci to check whether interrupter mapping should be enabled. The PCI XHCI device type now provides an implementation of this callback if the new "conditional-intr-mapping" property is enabled. (default: disabled) When enabled, interrupter mapping is only enabled when MSI-X or MSI is active. This means that when using pin-based interrupts, events are only submitted to interrupter 0 regardless of selected target. This allows the macOS guest drivers to work with the device in those configurations. Signed-off-by: Phil Dennis-Jordan <phil@philjordan.eu> Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2705 Message-ID: <20241227121336.25838-6-phil@philjordan.eu> Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
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* USB xHCI controller emulation
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*
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* Copyright (c) 2011 Securiforest
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* Date: 2011-05-11 ; Author: Hector Martin <hector@marcansoft.com>
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* Based on usb-ohci.c, emulates Renesas NEC USB 3.0
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* Date: 2020-01-1; Author: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com>
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* PCI hooks are moved from XHCIState to XHCIPciState
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef HW_USB_HCD_XHCI_PCI_H
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#define HW_USB_HCD_XHCI_PCI_H
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#include "hw/pci/pci_device.h"
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#include "hw/usb.h"
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#include "hcd-xhci.h"
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#define TYPE_XHCI_PCI "pci-xhci"
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#define XHCI_PCI(obj) \
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OBJECT_CHECK(XHCIPciState, (obj), TYPE_XHCI_PCI)
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typedef struct XHCIPciState {
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/*< private >*/
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PCIDevice parent_obj;
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/*< public >*/
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XHCIState xhci;
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OnOffAuto msi;
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OnOffAuto msix;
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bool conditional_intr_mapping;
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} XHCIPciState;
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#endif
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