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hv: vpci: refine vpci deinit

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The existing code do separately for each VM when we deinit vpci of a VM. This is
not necessary. This patch use the common handling for all VMs: we first deassign
it from the (current) user, then give it back to its parent user.

When we deassign the vdev from the (current) user, we would de-initialize the
vMSI/VMSI-X remapping, so does the vMSI/vMSI-X data structure.

Tracked-On: #4550
Signed-off-by: Li Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong<eddie.dong@Intel.com>
This commit is contained in:
Li Fei1 2020-05-12 15:06:02 +08:00 committed by wenlingz
parent 15e3062631
commit f9d26a80ed
5 changed files with 54 additions and 137 deletions
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3
hypervisor/dm/vpci/vmsi.c
View File

@ -127,10 +127,11 @@ void write_vmsi_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint
* @pre vdev->vpci != NULL
* @pre vdev->vpci->vm != NULL
*/
void deinit_vmsi(const struct pci_vdev *vdev)
void deinit_vmsi(struct pci_vdev *vdev)
{
if (has_msi_cap(vdev)) {
ptirq_remove_msix_remapping(vpci2vm(vdev->vpci), vdev->bdf.value, 1U);
(void)memset((void *)&vdev->msi, 0U, sizeof(struct pci_msi));
}
}

3
hypervisor/dm/vpci/vmsix.c
View File

@ -262,11 +262,12 @@ void init_vmsix(struct pci_vdev *vdev)
* @pre vdev->vpci != NULL
* @pre vdev->vpci->vm != NULL
*/
void deinit_vmsix(const struct pci_vdev *vdev)
void deinit_vmsix(struct pci_vdev *vdev)
{
if (has_msix_cap(vdev)) {
if (vdev->msix.table_count != 0U) {
ptirq_remove_msix_remapping(vpci2vm(vdev->vpci), vdev->bdf.value, vdev->msix.table_count);
(void)memset((void *)&vdev->msix, 0U, sizeof(struct pci_msix));
}
}
}

179
hypervisor/dm/vpci/vpci.c
View File

@ -39,8 +39,6 @@
#include "pci_dev.h"
static void vpci_init_vdevs(struct acrn_vm *vm);
static void deinit_prelaunched_vm_vpci(struct acrn_vm *vm);
static void deinit_postlaunched_vm_vpci(struct acrn_vm *vm);
static int32_t vpci_read_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t *val);
static int32_t vpci_write_cfg(struct acrn_vpci *vpci, union pci_bdf bdf, uint32_t offset, uint32_t bytes, uint32_t val);
static struct pci_vdev *find_available_vdev(struct acrn_vpci *vpci, union pci_bdf bdf);
@ -272,23 +270,24 @@ void init_vpci(struct acrn_vm *vm)
*/
void deinit_vpci(struct acrn_vm *vm)
{
struct acrn_vm_config *vm_config;
struct pci_vdev *vdev, *parent_vdev;
uint32_t i;
vm_config = get_vm_config(vm->vm_id);
switch (vm_config->load_order) {
case PRE_LAUNCHED_VM:
case SOS_VM:
/* deinit function for both SOS and pre-launched VMs (consider sos also as pre-launched) */
deinit_prelaunched_vm_vpci(vm);
break;
for (i = 0U; i < vm->vpci.pci_vdev_cnt; i++) {
vdev = (struct pci_vdev *) &(vm->vpci.pci_vdevs[i]);
case POST_LAUNCHED_VM:
deinit_postlaunched_vm_vpci(vm);
break;
/* Only deinit the VM's own devices */
if (vdev->user == vdev) {
parent_vdev = vdev->parent_user;
default:
/* Unsupported VM type - Do nothing */
break;
vdev->vdev_ops->deinit_vdev(vdev);
if (parent_vdev != NULL) {
spinlock_obtain(&parent_vdev->vpci->lock);
parent_vdev->vdev_ops->init_vdev(parent_vdev);
spinlock_release(&parent_vdev->vpci->lock);
}
}
}
ptdev_release_all_entries(vm);
@ -658,76 +657,6 @@ static void vpci_init_vdevs(struct acrn_vm *vm)
}
}
/**
* @pre vm != NULL
* @pre vm->vpci.pci_vdev_cnt <= CONFIG_MAX_PCI_DEV_NUM
* @pre is_sos_vm(vm) || is_prelaunched_vm(vm)
*/
static void deinit_prelaunched_vm_vpci(struct acrn_vm *vm)
{
struct pci_vdev *vdev;
uint32_t i;
for (i = 0U; i < vm->vpci.pci_vdev_cnt; i++) {
vdev = (struct pci_vdev *) &(vm->vpci.pci_vdevs[i]);
/* Only deinit the VM's own devices */
if (vdev->user == vdev) {
vdev->vdev_ops->deinit_vdev(vdev);
}
}
}
/**
* @pre vm != NULL && Pointer vm shall point to SOS_VM
* @pre vm->vpci.pci_vdev_cnt <= CONFIG_MAX_PCI_DEV_NUM
* @pre is_postlaunched_vm(vm) == true
*/
static void deinit_postlaunched_vm_vpci(struct acrn_vm *vm)
{
struct acrn_vm *sos_vm;
uint32_t i;
struct pci_vdev *vdev, *target_vdev;
int32_t ret;
/* PCI resources
* 1) IOMMU domain switch
* 2) Relese UOS MSI host IRQ/IRTE
* 3) Update vdev info in SOS vdev
* Cleanup mentioned above is taken care when DM releases UOS resources
* during a UOS reboot or shutdown
* In the following cases, where DM does not get chance to cleanup
* 1) DM crash/segfault
* 2) SOS triple fault/hang
* 3) SOS reboot before shutting down POST_LAUNCHED_VMs
* ACRN must cleanup
*/
sos_vm = get_sos_vm();
spinlock_obtain(&sos_vm->vpci.lock);
for (i = 0U; i < sos_vm->vpci.pci_vdev_cnt; i++) {
vdev = (struct pci_vdev *)&(sos_vm->vpci.pci_vdevs[i]);
/* Only deinit the VM's own devices */
if (vdev->user == vdev) {
spinlock_obtain(&vm->vpci.lock);
target_vdev = vdev->user;
ret = move_pt_device(vm->iommu, sos_vm->iommu, (uint8_t)target_vdev->pdev->bdf.bits.b,
(uint8_t)(target_vdev->pdev->bdf.value & 0xFFU));
if (ret != 0) {
panic("failed to assign iommu device!");
}
deinit_vmsi(target_vdev);
deinit_vmsix(target_vdev);
/* Move vdev pointers back to SOS*/
vdev->user = NULL;
spinlock_release(&vm->vpci.lock);
}
}
spinlock_release(&sos_vm->vpci.lock);
}
/**
* @brief assign a PCI device from SOS to target post-launched VM.
*
@ -765,32 +694,31 @@ int32_t vpci_assign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *pc
pdev_restore_bar(vdev_in_sos->pdev);
}
remove_vdev_pt_iommu_domain(vdev_in_sos);
if (ret == 0) {
vpci = &(tgt_vm->vpci);
vdev_in_sos->vdev_ops->deinit_vdev(vdev_in_sos);
spinlock_obtain(&tgt_vm->vpci.lock);
vdev = vpci_init_vdev(vpci, vdev_in_sos->pci_dev_config, vdev_in_sos->phyfun);
pci_vdev_write_vcfg(vdev, PCIR_INTERRUPT_LINE, 1U, pcidev->intr_line);
pci_vdev_write_vcfg(vdev, PCIR_INTERRUPT_PIN, 1U, pcidev->intr_pin);
for (idx = 0U; idx < vdev->nr_bars; idx++) {
/* VF is assigned to a UOS */
if (vdev->phyfun != NULL) {
vdev->vbars[idx] = vdev_in_sos->vbars[idx];
if (has_msix_cap(vdev) && (idx == vdev->msix.table_bar)) {
vdev->msix.mmio_hpa = vdev->vbars[idx].base_hpa;
vdev->msix.mmio_size = vdev->vbars[idx].size;
}
vpci = &(tgt_vm->vpci);
spinlock_obtain(&tgt_vm->vpci.lock);
vdev = vpci_init_vdev(vpci, vdev_in_sos->pci_dev_config, vdev_in_sos->phyfun);
pci_vdev_write_vcfg(vdev, PCIR_INTERRUPT_LINE, 1U, pcidev->intr_line);
pci_vdev_write_vcfg(vdev, PCIR_INTERRUPT_PIN, 1U, pcidev->intr_pin);
for (idx = 0U; idx < vdev->nr_bars; idx++) {
/* VF is assigned to a UOS */
if (vdev->phyfun != NULL) {
vdev->vbars[idx] = vdev_in_sos->vbars[idx];
if (has_msix_cap(vdev) && (idx == vdev->msix.table_bar)) {
vdev->msix.mmio_hpa = vdev->vbars[idx].base_hpa;
vdev->msix.mmio_size = vdev->vbars[idx].size;
}
pci_vdev_write_vbar(vdev, idx, pcidev->bar[idx]);
}
vdev->flags |= pcidev->type;
vdev->bdf.value = pcidev->virt_bdf;
vdev->parent_user = vdev_in_sos;
spinlock_release(&tgt_vm->vpci.lock);
vdev_in_sos->user = vdev;
pci_vdev_write_vbar(vdev, idx, pcidev->bar[idx]);
}
vdev->flags |= pcidev->type;
vdev->bdf.value = pcidev->virt_bdf;
vdev->parent_user = vdev_in_sos;
spinlock_release(&tgt_vm->vpci.lock);
vdev_in_sos->user = vdev;
} else {
pr_fatal("%s, can't find PCI device %x:%x.%x for vm[%d] %x:%x.%x\n", __func__,
pcidev->phys_bdf >> 8U, (pcidev->phys_bdf >> 3U) & 0x1fU, pcidev->phys_bdf & 0x7U,
@ -812,34 +740,22 @@ int32_t vpci_assign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *pc
int32_t vpci_deassign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *pcidev)
{
int32_t ret = 0;
struct pci_vdev *vdev_in_sos, *vdev;
struct pci_vdev *parent_vdev, *vdev;
union pci_bdf bdf;
struct acrn_vm *sos_vm;
bdf.value = pcidev->phys_bdf;
sos_vm = get_sos_vm();
spinlock_obtain(&sos_vm->vpci.lock);
vdev_in_sos = pci_find_vdev(&sos_vm->vpci, bdf);
if ((vdev_in_sos != NULL) && (vdev_in_sos->user != NULL) &&
(vdev_in_sos->user->vpci == &tgt_vm->vpci) && (vdev_in_sos->pdev != NULL)) {
vdev = vdev_in_sos->user;
bdf.value = pcidev->virt_bdf;
vdev = pci_find_vdev(&tgt_vm->vpci, bdf);
if ((vdev != NULL) && (vdev->user == vdev) && (vdev->pdev != NULL) &&
(vdev->pdev->bdf.value == pcidev->phys_bdf)) {
parent_vdev = vdev->parent_user;
spinlock_obtain(&tgt_vm->vpci.lock);
vdev->vdev_ops->deinit_vdev(vdev);
if (vdev != NULL) {
ret = move_pt_device(tgt_vm->iommu, sos_vm->iommu, (uint8_t)(pcidev->phys_bdf >> 8U),
(uint8_t)(pcidev->phys_bdf & 0xffU));
if (ret != 0) {
panic("failed to assign iommu device!");
}
deinit_vmsi(vdev);
deinit_vmsix(vdev);
if (parent_vdev != NULL) {
spinlock_obtain(&parent_vdev->vpci->lock);
parent_vdev->vdev_ops->init_vdev(parent_vdev);
spinlock_release(&parent_vdev->vpci->lock);
}
spinlock_release(&tgt_vm->vpci.lock);
vdev_in_sos->user = NULL;
} else {
pr_fatal("%s, can't find PCI device %x:%x.%x for vm[%d] %x:%x.%x\n", __func__,
pcidev->phys_bdf >> 8U, (pcidev->phys_bdf >> 3U) & 0x1fU, pcidev->phys_bdf & 0x7U,
@ -847,7 +763,6 @@ int32_t vpci_deassign_pcidev(struct acrn_vm *tgt_vm, struct acrn_assign_pcidev *
pcidev->virt_bdf >> 8U, (pcidev->virt_bdf >> 3U) & 0x1fU, pcidev->virt_bdf & 0x7U);
ret = -ENODEV;
}
spinlock_release(&sos_vm->vpci.lock);
return ret;
}

4
hypervisor/dm/vpci/vpci_priv.h
View File

@ -120,13 +120,13 @@ void vdev_pt_map_msix(struct pci_vdev *vdev, bool hold_lock);
void init_vmsi(struct pci_vdev *vdev);
void read_vmsi_cfg(const struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t *val);
void write_vmsi_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t val);
void deinit_vmsi(const struct pci_vdev *vdev);
void deinit_vmsi(struct pci_vdev *vdev);
void init_vmsix(struct pci_vdev *vdev);
int32_t vmsix_handle_table_mmio_access(struct io_request *io_req, void *handler_private_data);
void read_vmsix_cfg(const struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t *val);
void write_vmsix_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t val);
void deinit_vmsix(const struct pci_vdev *vdev);
void deinit_vmsix(struct pci_vdev *vdev);
void init_vsriov(struct pci_vdev *vdev);
void read_sriov_cap_reg(const struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t *val);

2
hypervisor/include/dm/vpci.h
View File

@ -96,7 +96,7 @@ struct pci_vdev_ops {
};
struct pci_vdev {
const struct acrn_vpci *vpci;
struct acrn_vpci *vpci;
/* The bus/device/function triple of the virtual PCI device. */
union pci_bdf bdf;