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hypervisor/ivshmem: Fix ivshmem ivposition loss issue

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ACRN sets the ivposition to the VM_ID in ivshmem_server_bind_peer().
This value should be saved in the ivshmem_device until unbind.
It is wrong to clear ivs_dev->mmio in the ivshmem_vbar_map(),
Instead, it should clear the ivshmem_device structure in the
create_ivshmem_device to ensure the same initial states
after VM reboot case.

Tracked-On: #8485

Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Reviewed-by: Junjie Mao <Junjie.mao@intel.com>
This commit is contained in:
Zhang Chen 2023-06-27 09:38:51 +08:00 committed by acrnsi-robot
parent 7f2fd0b5fd
commit c9c0d2167b
1 changed files with 5 additions and 2 deletions
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7
hypervisor/dm/vpci/ivshmem.c
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@ -180,6 +180,11 @@ static void create_ivshmem_device(struct pci_vdev *vdev)
}
spinlock_release(&ivshmem_dev_lock);
ASSERT((i < IVSHMEM_DEV_NUM), "failed to find and set ivshmem device");
/*
* Clear ivshmem_device mmio to ensure the same initial
* states after VM reboot.
*/
memset(&ivshmem_dev[i].mmio, 0U, sizeof(uint32_t) * 4);
}
/*
@ -248,13 +253,11 @@ 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];
struct ivshmem_device *ivs_dev = (struct ivshmem_device *) vdev->priv_data;
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 | EPT_IGNORE_PAT);
} else if ((idx == IVSHMEM_MMIO_BAR) && (vbar->base_gpa != 0UL)) {
(void)memset(&ivs_dev->mmio, 0U, sizeof(ivs_dev->mmio));
register_mmio_emulation_handler(vm, ivshmem_mmio_handler, vbar->base_gpa,
(vbar->base_gpa + vbar->size), vdev, false);
ept_del_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vbar->base_gpa, round_page_up(vbar->size));