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https://github.com/projectacrn/acrn-hypervisor.git
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a4a73b5aac
For a pdev which allocated to prelaunched VM or owned by HV, we need to check whether it is a multifuction dev at function 0. If yes we have to emulate a dummy function dev in Service VM, otherwise the sub-function devices will be lost in guest OS pci probe process. Tracked-On: #8492 Reviewed-by: Junjie Mao <junjie.mao@intel.com> Signed-off-by: Qiang Zhang <qiang4.zhang@intel.com> Signed-off-by: Victor Sun <victor.sun@intel.com>
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* Copyright (C) 2019-2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <asm/vm_config.h>
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#include <pci.h>
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#include <asm/pci_dev.h>
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#include <vpci.h>
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/*
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* @pre pdev != NULL;
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*/
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static bool allocate_to_prelaunched_vm(struct pci_pdev *pdev)
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{
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bool found = false;
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uint16_t vmid;
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uint16_t pci_idx;
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struct acrn_vm_config *vm_config;
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struct acrn_vm_pci_dev_config *dev_config;
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for (vmid = 0U; (vmid < CONFIG_MAX_VM_NUM) && !found; vmid++) {
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vm_config = get_vm_config(vmid);
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if (vm_config->load_order == PRE_LAUNCHED_VM) {
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for (pci_idx = 0U; pci_idx < vm_config->pci_dev_num; pci_idx++) {
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dev_config = &vm_config->pci_devs[pci_idx];
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if ((dev_config->emu_type == PCI_DEV_TYPE_PTDEV) &&
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bdf_is_equal(dev_config->pbdf, pdev->bdf)) {
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dev_config->pdev = pdev;
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found = true;
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break;
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}
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}
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}
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}
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return found;
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}
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/*
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* @brief Initialize a acrn_vm_pci_dev_config structure
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*
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* Initialize a acrn_vm_pci_dev_config structure with a specified the pdev structure.
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* A acrn_vm_pci_dev_config is used to store a PCI device configuration for a VM. The
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* caller of the function init_one_dev_config should guarantee execution atomically.
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*
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* @pre pdev != NULL
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*
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* @return If there's a successfully initialized acrn_vm_pci_dev_config return it, otherwise return NULL;
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*/
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struct acrn_vm_pci_dev_config *init_one_dev_config(struct pci_pdev *pdev)
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{
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struct acrn_vm_pci_dev_config *dev_config = NULL;
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bool is_allocated_to_prelaunched_vm = allocate_to_prelaunched_vm(pdev);
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bool is_allocated_to_hv = is_hv_owned_pdev(pdev->bdf);
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if (service_vm_config != NULL) {
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dev_config = &service_vm_config->pci_devs[service_vm_config->pci_dev_num];
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if (is_allocated_to_hv) {
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/* Service VM need to emulate the type1 pdevs owned by HV */
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dev_config->emu_type = PCI_DEV_TYPE_SERVICE_VM_EMUL;
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if (is_bridge(pdev)) {
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dev_config->vdev_ops = &vpci_bridge_ops;
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} else if (is_host_bridge(pdev)) {
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dev_config->vdev_ops = &vhostbridge_ops;
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} else {
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/* May have type0 device, E.g. debug pci uart */
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dev_config = NULL;
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}
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} else if (is_allocated_to_prelaunched_vm) {
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dev_config = NULL;
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} else {
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dev_config->emu_type = PCI_DEV_TYPE_PTDEV;
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}
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if ((is_allocated_to_hv || is_allocated_to_prelaunched_vm)
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&& (dev_config == NULL)
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&& is_pci_cfg_multifunction(pdev->hdr_type)
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&& (pdev->bdf.bits.f == 0U))
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{
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dev_config = &service_vm_config->pci_devs[service_vm_config->pci_dev_num];
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dev_config->emu_type = PCI_DEV_TYPE_DUMMY_MF_EMUL;
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dev_config->vdev_ops = &vpci_mf_dev_ops;
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}
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}
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if (dev_config != NULL) {
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dev_config->vbdf.value = pdev->bdf.value;
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dev_config->pbdf.value = pdev->bdf.value;
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dev_config->pdev = pdev;
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service_vm_config->pci_dev_num++;
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}
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return dev_config;
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}
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