vfio/pci/vfio_pci_config.c

354 	 * Round up all permission bits to the next dword, this lets us
357 	 *  - Standard config space is already dword aligned
358 	 *  - Capabilities are all dword aligned (bits 0:1 of next reserved)
359 	 *  - Express capabilities defined as dword aligned
1015 	 * Virtualize the first dword of all express capabilities
1311 	u32 dword;
1328 						      &dword);
1329 				vdev->extended_caps = (dword != 0);
1344 			pci_read_config_dword(pdev, PCI_CFG_SPACE_SIZE, &dword);
1345 			vdev->extended_caps = (dword != 0);
1387 	u32 dword;
1393 					    &dword);
1397 		return PCI_VNDR_HEADER_LEN(dword);
1438 		ret = pci_read_config_dword(pdev, epos + PCI_TPH_CAP, &dword);
1442 		if ((dword & PCI_TPH_CAP_LOC_MASK) == PCI_TPH_LOC_CAP) {
1445 			sts = dword & PCI_TPH_CAP_ST_MASK;
1451 		ret = pci_read_config_dword(pdev, epos + PCI_DVSEC_HEADER1, &dword);
1454 		return PCI_DVSEC_HEADER1_LEN(dword);
1482 	 * we can, assuming that all of the fields support dword access.
1490 			u32 dword;
1492 			ret = pci_read_config_dword(pdev, offset, &dword);
1495 			*dwordp = cpu_to_le32(dword);
1544 	/* We can bound our loop, capabilities are dword aligned */
1723  * capability occupying each dword and thus the struct perm_bits we
1741 	 * Config space, caps and ecaps are all dword aligned, so we could
1742 	 * use one byte per dword to record the type.  However, there are
1853  * Find the remaining number of bytes in a dword that match the given
1854  * position.  Stop at either the end of the capability or the dword boundary.