112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
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/*
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* graphics passthrough
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*/
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#include "xen_pt.h"
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#include "xen-host-pci-device.h"
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#include "hw/xen/xen_backend.h"
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typedef struct VGARegion {
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int type; /* Memory or port I/O */
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uint64_t guest_base_addr;
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uint64_t machine_base_addr;
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uint64_t size; /* size of the region */
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int rc;
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} VGARegion;
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#define IORESOURCE_IO 0x00000100
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#define IORESOURCE_MEM 0x00000200
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static struct VGARegion vga_args[] = {
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{
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.type = IORESOURCE_IO,
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.guest_base_addr = 0x3B0,
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.machine_base_addr = 0x3B0,
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.size = 0xC,
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.rc = -1,
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},
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{
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.type = IORESOURCE_IO,
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.guest_base_addr = 0x3C0,
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.machine_base_addr = 0x3C0,
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.size = 0x20,
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.rc = -1,
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},
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{
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.type = IORESOURCE_MEM,
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.guest_base_addr = 0xa0000 >> XC_PAGE_SHIFT,
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.machine_base_addr = 0xa0000 >> XC_PAGE_SHIFT,
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.size = 0x20,
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.rc = -1,
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},
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};
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/*
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* register VGA resources for the domain with assigned gfx
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*/
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int xen_pt_register_vga_regions(XenHostPCIDevice *dev)
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{
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int i = 0;
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if (!is_igd_vga_passthrough(dev)) {
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return 0;
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}
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for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) {
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if (vga_args[i].type == IORESOURCE_IO) {
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vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
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vga_args[i].guest_base_addr,
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vga_args[i].machine_base_addr,
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vga_args[i].size, DPCI_ADD_MAPPING);
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} else {
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vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid,
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vga_args[i].guest_base_addr,
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vga_args[i].machine_base_addr,
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vga_args[i].size, DPCI_ADD_MAPPING);
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}
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if (vga_args[i].rc) {
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XEN_PT_ERR(NULL, "VGA %s mapping failed! (rc: %i)\n",
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vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory",
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vga_args[i].rc);
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return vga_args[i].rc;
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}
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}
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return 0;
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}
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/*
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* unregister VGA resources for the domain with assigned gfx
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*/
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int xen_pt_unregister_vga_regions(XenHostPCIDevice *dev)
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{
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int i = 0;
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if (!is_igd_vga_passthrough(dev)) {
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return 0;
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}
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for (i = 0 ; i < ARRAY_SIZE(vga_args); i++) {
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if (vga_args[i].type == IORESOURCE_IO) {
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vga_args[i].rc = xc_domain_ioport_mapping(xen_xc, xen_domid,
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vga_args[i].guest_base_addr,
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vga_args[i].machine_base_addr,
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vga_args[i].size, DPCI_REMOVE_MAPPING);
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} else {
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vga_args[i].rc = xc_domain_memory_mapping(xen_xc, xen_domid,
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vga_args[i].guest_base_addr,
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vga_args[i].machine_base_addr,
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vga_args[i].size, DPCI_REMOVE_MAPPING);
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}
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if (vga_args[i].rc) {
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XEN_PT_ERR(NULL, "VGA %s unmapping failed! (rc: %i)\n",
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vga_args[i].type == IORESOURCE_IO ? "ioport" : "memory",
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vga_args[i].rc);
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return vga_args[i].rc;
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}
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}
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return 0;
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}
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