Interface vmm_pci_helper.h

The interface presents a series of helpers for establishing VMM PCI support on x86 platforms.

Brief content:

Functions:

vmm_pci_helper_map_bars(vm, cfg, bars)

vmm_pci_io_port_in(vcpu, cookie, port_no, size, result)

vmm_pci_io_port_out(vcpu, cookie, port_no, size, value)

Functions

The interface vmm_pci_helper.h defines the following functions.

Function vmm_pci_helper_map_bars(vm, cfg, bars)

Given a PCI device config, map the PCI device bars into the VM, effectively passing-through the PCI device. This will map MMIO and IO-based bars.

Parameters:

• vm {vm_t *}: A handle to the VM
• cfg {libpci_device_iocfg_t *}: PCI device config
• bars {vmm_pci_bar_t *}: Resulting PCI bars mapped into the VM

Returns:

• -1 for error, otherwise the number of bars mapped into the VM (>=0)

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Function vmm_pci_io_port_in(vcpu, cookie, port_no, size, result)

Emulates IOPort in access on the VMM Virtual PCI device

Parameters:

• vcpu {vm_vcpu_t *}: Faulting vcpu performing ioport access
• port_no {unsigned int}: Port address being accessed
• size {unsigned int}: Size of ioport access
• result {unsigned int *}: Pointer that will be populated with resulting data of io-in op

Returns:

No return

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Function vmm_pci_io_port_out(vcpu, cookie, port_no, size, value)

Emulates IOPort out access on the VMM Virtual PCI device

Parameters:

• vcpu {vm_vcpu_t *}: Faulting vcpu performing ioport access
• port_no {unsigned int}: Port address being accessed
• size {unsigned int}: Size of ioport access
• value {unsigned int}: Value being written in io-out op

Returns:

No return

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