vpci_bar

The state of a given PCI BAR

Synopsis:

#include <qvm/vpci.h>
struct vpci_bar {
    struct gasp_region vb_mapping;
    uint32_t vb_value;
    uint32_t vb_value_upper;
    uint16_t vb_slice;
    uint16_t vb_breg;
    uint32_t vb_zero;
};

Data:

struct gasp_region vb_mapping

Current established mapping.

The vb_mapping.host_location and vb_mapping.guest.length fields are expected to be constant.

uint32_t vb_value

Current value of the BAR.

uint32_t vb_value_upper

Upper word for 64-bit BARs.

uint16_t vb_slice

Slice index for the BAR.

uint16_t vb_breg

BAR register; should be left as zero (0) if this vpci_bar structure is the storage back-end. If this field is non-zero, the qvm process writes the value of the BAR back to the device when assigning an address to the BAR.

uint32_t vb_zero

Must be initialized to 0.

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