68f5d3f3b6
To support testing of PCI/PCIe drivers in UML, add a PCI bus support driver. This driver uses virtio, which in UML is really just vhost-user, to talk to devices, and adds the devices to the virtual PCI bus in the system. Since virtio already allows DMA/bus mastering this really isn't all that hard, of course we need the logic_iomem infrastructure that was added by a previous patch. The protocol to talk to the device is has a few fairly simple messages for reading to/writing from config and IO spaces, and messages for the device to send the various interrupts (INT#, MSI/MSI-X and while suspended PME#). Note that currently no offical virtio device ID is assigned for this protocol, as a consequence this patch requires defining it in the Kconfig, with a default that makes the driver refuse to work at all. Finally, in order to add support for MSI/MSI-X interrupts, some small changes are needed in the UML IRQ code, it needs to have more interrupts, changing NR_IRQS from 64 to 128 if this driver is enabled, but not actually use them for anything so that the generic IRQ domain/MSI infrastructure can allocate IRQ numbers. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
31 lines
723 B
Makefile
31 lines
723 B
Makefile
# SPDX-License-Identifier: GPL-2.0
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generic-y += bpf_perf_event.h
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generic-y += bug.h
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generic-y += compat.h
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generic-y += current.h
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generic-y += device.h
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generic-y += emergency-restart.h
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generic-y += exec.h
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generic-y += extable.h
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generic-y += fb.h
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generic-y += ftrace.h
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generic-y += futex.h
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generic-y += hw_irq.h
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generic-y += irq_regs.h
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generic-y += irq_work.h
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generic-y += kdebug.h
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generic-y += mcs_spinlock.h
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generic-y += mmiowb.h
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generic-y += module.lds.h
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generic-y += param.h
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generic-y += percpu.h
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generic-y += preempt.h
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generic-y += softirq_stack.h
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generic-y += switch_to.h
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generic-y += topology.h
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generic-y += trace_clock.h
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generic-y += word-at-a-time.h
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generic-y += kprobes.h
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generic-y += mm_hooks.h
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generic-y += vga.h
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