mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-06-22 21:47:22 +00:00
0287b3c05a
It is found that SOS will reset the PCI devices under PCI bridge 00:1c.0 when 00:1c.0 is exposed to SOS. If a PCI device under 00:1c.0 is passed through to pre-launched VM, it will be reset by SOS at startup hence the passthrough will not work properly. This patch provides a workaround by hiding PCI bridge 00:1c.0 from SOS in this case. Tracked-On: #5346 Signed-off-by: Jian Jun Chen <jian.jun.chen@intel.com>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2019 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <vm_config.h>
|
|
#include <pci.h>
|
|
#include <pci_dev.h>
|
|
#include <vpci.h>
|
|
#include <logmsg.h>
|
|
|
|
struct acrn_vm_pci_dev_config sos_pci_devs[CONFIG_MAX_PCI_DEV_NUM];
|
|
|
|
/*
|
|
* @pre pdev != NULL;
|
|
*/
|
|
static bool is_allocated_to_prelaunched_vm(struct pci_pdev *pdev)
|
|
{
|
|
bool found = false;
|
|
uint16_t vmid;
|
|
uint32_t pci_idx;
|
|
struct acrn_vm_config *vm_config;
|
|
struct acrn_vm_pci_dev_config *dev_config;
|
|
|
|
for (vmid = 0U; (vmid < CONFIG_MAX_VM_NUM) && !found; vmid++) {
|
|
vm_config = get_vm_config(vmid);
|
|
if (vm_config->load_order == PRE_LAUNCHED_VM) {
|
|
for (pci_idx = 0U; pci_idx < vm_config->pci_dev_num; pci_idx++) {
|
|
dev_config = &vm_config->pci_devs[pci_idx];
|
|
if ((dev_config->emu_type == PCI_DEV_TYPE_PTDEV) &&
|
|
bdf_is_equal(dev_config->pbdf, pdev->bdf)) {
|
|
dev_config->pdev = pdev;
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
static bool is_pbus_allocated_to_prelaunched_vm(uint8_t bus)
|
|
{
|
|
bool found = false;
|
|
uint16_t vmid;
|
|
uint32_t pci_idx;
|
|
struct acrn_vm_config *vm_config;
|
|
struct acrn_vm_pci_dev_config *dev_config;
|
|
|
|
for (vmid = 0U; (vmid < CONFIG_MAX_VM_NUM) && !found; vmid++) {
|
|
vm_config = get_vm_config(vmid);
|
|
if (vm_config->load_order == PRE_LAUNCHED_VM) {
|
|
for (pci_idx = 0U; pci_idx < vm_config->pci_dev_num; pci_idx++) {
|
|
dev_config = &vm_config->pci_devs[pci_idx];
|
|
if ((dev_config->emu_type == PCI_DEV_TYPE_PTDEV) &&
|
|
(dev_config->pbdf.bits.b == bus)) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
static bool need_hide_from_sos(struct pci_pdev *pdev)
|
|
{
|
|
const union pci_bdf bdf = {.bits.b = 0U, .bits.d = 0x1cU, .bits.f = 0U};
|
|
uint8_t hdr_type, hdr_layout, sec_busno;
|
|
uint32_t vid, pid;
|
|
bool ret = false;
|
|
|
|
if (bdf_is_equal(bdf, pdev->bdf)) {
|
|
vid = pci_pdev_read_cfg(pdev->bdf, PCIR_VENDOR, 2U);
|
|
pid = pci_pdev_read_cfg(pdev->bdf, PCIR_DEVICE, 2U);
|
|
hdr_type = (uint8_t)pci_pdev_read_cfg(pdev->bdf, PCIR_HDRTYPE, 1U);
|
|
hdr_layout = (hdr_type & PCIM_HDRTYPE);
|
|
|
|
if ((vid == 0x8086) && (pid == 0xa0bc) && (hdr_layout == PCIM_HDRTYPE_BRIDGE)) {
|
|
sec_busno = (uint8_t)pci_pdev_read_cfg(pdev->bdf, PCIR_SECBUS_1, 1U);
|
|
ret = is_pbus_allocated_to_prelaunched_vm(sec_busno);
|
|
if (ret) {
|
|
pr_acrnlog("%s: [%x:%x.%x] is hidden from SOS",
|
|
__func__, bdf.bits.b, bdf.bits.d, bdf.bits.f);
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* @brief Initialize a acrn_vm_pci_dev_config structure
|
|
*
|
|
* Initialize a acrn_vm_pci_dev_config structure with a specified the pdev structure.
|
|
* A acrn_vm_pci_dev_config is used to store a PCI device configuration for a VM. The
|
|
* caller of the function init_one_dev_config should guarantee execution atomically.
|
|
*
|
|
* @pre pdev != NULL
|
|
*
|
|
* @return If there's a successfully initialized acrn_vm_pci_dev_config return it, otherwise return NULL;
|
|
*/
|
|
struct acrn_vm_pci_dev_config *init_one_dev_config(struct pci_pdev *pdev)
|
|
{
|
|
uint16_t vmid;
|
|
struct acrn_vm_config *vm_config;
|
|
struct acrn_vm_pci_dev_config *dev_config = NULL;
|
|
|
|
if (!is_allocated_to_prelaunched_vm(pdev) && !need_hide_from_sos(pdev)) {
|
|
for (vmid = 0U; vmid < CONFIG_MAX_VM_NUM; vmid++) {
|
|
vm_config = get_vm_config(vmid);
|
|
if (vm_config->load_order != SOS_VM) {
|
|
continue;
|
|
}
|
|
|
|
dev_config = &vm_config->pci_devs[vm_config->pci_dev_num];
|
|
dev_config->emu_type = PCI_DEV_TYPE_PTDEV;
|
|
dev_config->vbdf.value = pdev->bdf.value;
|
|
dev_config->pbdf.value = pdev->bdf.value;
|
|
dev_config->pdev = pdev;
|
|
vm_config->pci_dev_num++;
|
|
}
|
|
}
|
|
return dev_config;
|
|
}
|