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hv: mmu: replace dynamic memory allocation in memory

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Replace dynamic memory allocation in memory management with static memory allocation.
Since the static memory allocation can guarantee the allocation never failed, so
split_large_page and construct_pgentry don't need to return a errno any more.
Besides, the destroy_ept don't need to free page any more. Instead, it would memset
the eptp to 0 to make sure we can't walk this paging table again.

Tracked-On: #861
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
This commit is contained in:
Li, Fei1
2018-10-30 05:55:57 +08:00
committed by lijinxia
parent 9c7c0de08f
commit 0391f84c83
13 changed files with 147 additions and 236 deletions
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2
hypervisor/dm/vpci/pci_pt.c
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@@ -68,7 +68,7 @@ static int vdev_pt_init(struct pci_vdev *vdev)
/* Create an iommu domain for target VM if not created */
if (vm->iommu == NULL) {
if (vm->arch_vm.nworld_eptp == 0UL) {
vm->arch_vm.nworld_eptp = alloc_paging_struct();
vm->arch_vm.nworld_eptp = vm->arch_vm.ept_mem_ops.get_pml4_page(vm->arch_vm.ept_mem_ops.info, 0UL);
sanitize_pte((uint64_t *)vm->arch_vm.nworld_eptp);
}
vm->iommu = create_iommu_domain(vm->vm_id,