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hv: implement configuration space operations of ivshmem device

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Implement read_vdev_cfg/write_vdev_cfg operations for ivshmem deivce

v2: read_vdev_cfg/write_vdev_cfg always return zero, the ivshmem device
    only emulated in HV.

Tracked-On: #4853

Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yuan Liu 2020-08-06 20:10:16 +08:00 committed by wenlingz
parent 0f5ccab68e
commit b6661e48d8
1 changed files with 39 additions and 10 deletions
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49
hypervisor/dm/vpci/ivshmem.c
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@ -54,23 +54,52 @@ static struct ivshmem_shm_region *find_shm_region(const char *name)
static int32_t read_ivshmem_vdev_cfg(const struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t *val)
{
/* Implementation in next patch */
(void) vdev;
(void) offset;
(void) bytes;
(void) val;
if (cfg_header_access(offset)) {
if (vbar_access(vdev, offset)) {
*val = pci_vdev_read_vbar(vdev, pci_bar_index(offset));
} else {
*val = pci_vdev_read_vcfg(vdev, offset, bytes);
}
}
return 0;
}
static void ivshmem_vbar_unmap(struct pci_vdev *vdev, uint32_t idx)
{
struct acrn_vm *vm = vpci2vm(vdev->vpci);
struct pci_vbar *vbar = &vdev->vbars[idx];
if ((idx == IVSHMEM_SHM_BAR) && (vbar->base_gpa != 0UL)) {
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vbar->base_gpa, vbar->size);
}
}
static void ivshmem_vbar_map(struct pci_vdev *vdev, uint32_t idx)
{
struct acrn_vm *vm = vpci2vm(vdev->vpci);
struct pci_vbar *vbar = &vdev->vbars[idx];
if ((idx == IVSHMEM_SHM_BAR) && (vbar->base_hpa != INVALID_HPA) && (vbar->base_gpa != 0UL)) {
ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vbar->base_hpa,
vbar->base_gpa, vbar->size, EPT_RD | EPT_WR | EPT_WB);
}
}
static int32_t write_ivshmem_vdev_cfg(struct pci_vdev *vdev, uint32_t offset, uint32_t bytes, uint32_t val)
{
/* Implementation in next patch */
(void) vdev;
(void) offset;
(void) bytes;
(void) val;
if (cfg_header_access(offset)) {
if (vbar_access(vdev, offset)) {
vpci_update_one_vbar(vdev, pci_bar_index(offset), val,
ivshmem_vbar_map, ivshmem_vbar_unmap);
} else {
pci_vdev_write_vcfg(vdev, offset, bytes, val);
}
}
return 0;
}
/*
* @pre vdev != NULL
* @pre bar_idx < PCI_BAR_COUNT