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hv: add APIs to allow updating EPT mem type

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- Add PAGING_REQUEST_TYPE_MODIFY_MT memory map request type
- Update map_mem_region() to allow modifying the memory type related
  fields in a page table entry
- Add ept_update_mt()
- add modify_mem_mt() for both EPT and MMU

Signed-off-by: Zide Chen <zide.chen@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Zide Chen
2018-06-06 09:13:33 -07:00
committed by lijinxia
parent b435c74e91
commit 5d2ab4d9ef
3 changed files with 72 additions and 0 deletions
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21
hypervisor/arch/x86/ept.c
View File

@@ -489,3 +489,24 @@ int ept_mmap(struct vm *vm, uint64_t hpa,
return 0;
}
int ept_update_mt(struct vm *vm, uint64_t hpa,
uint64_t gpa, uint64_t size, uint32_t prot)
{
struct map_params map_params;
struct vcpu *vcpu;
int i;
/* Setup memory map parameters */
map_params.page_table_type = PTT_EPT;
map_params.pml4_base = HPA2HVA(vm->arch_vm.nworld_eptp);
map_params.pml4_inverted = HPA2HVA(vm->arch_vm.m2p);
modify_mem_mt(&map_params, (void *)hpa, (void *)gpa, size, prot);
foreach_vcpu(i, vm, vcpu) {
vcpu_make_request(vcpu, ACRN_REQUEST_EPT_FLUSH);
}
return 0;
}

43
hypervisor/arch/x86/mmu.c
View File

@@ -35,6 +35,7 @@ enum mem_map_request_type {
PAGING_REQUEST_TYPE_MAP = 0, /* Creates a new mapping. */
PAGING_REQUEST_TYPE_UNMAP = 1, /* Removes a pre-existing entry */
PAGING_REQUEST_TYPE_MODIFY = 2,
PAGING_REQUEST_TYPE_MODIFY_MT = 3, /* Update the memory type fields */
/* Modifies a pre-existing entries attributes. */
PAGING_REQUEST_TYPE_UNKNOWN,
};
@@ -375,6 +376,28 @@ static uint32_t map_mem_region(void *vaddr, void *paddr,
mmu_need_invtlb = true;
break;
}
case PAGING_REQUEST_TYPE_MODIFY_MT:
{
if (prev_entry_present) {
/* modify the memory type related fields only */
if (table_type == PTT_EPT)
table_entry = entry & ~IA32E_EPT_MT_MASK;
else
table_entry = entry & ~MMU_MEM_ATTR_TYPE_MASK;
table_entry |= attr;
/* Write the table entry to map this memory */
MEM_WRITE64(table_base + table_offset, table_entry);
/* Modify, need to invalidate TLB and
* page-structure cache
*/
if (table_type == PTT_HOST)
mmu_need_invtlb = true;
}
break;
}
default:
ASSERT(0, "Bad memory map request type");
return 0;
@@ -1124,3 +1147,23 @@ int modify_mem(struct map_params *map_params, void *paddr, void *vaddr,
}
return ret;
}
int modify_mem_mt(struct map_params *map_params, void *paddr, void *vaddr,
uint64_t size, uint32_t flags)
{
int ret = 0;
/* used for MMU and EPT*/
ret = modify_paging(map_params, paddr, vaddr, size, flags,
PAGING_REQUEST_TYPE_MODIFY_MT, true);
if (ret < 0)
return ret;
/* only for EPT */
if (map_params->page_table_type == PTT_EPT) {
ret = modify_paging(map_params, vaddr, paddr, size, flags,
PAGING_REQUEST_TYPE_MODIFY_MT, false);
}
return ret;
}