hv: vtd: remove dynamic page allocation for root&ctx table

Preserve pages for each vtd root table and ctx table

Tracked-On: #861
Signed-off-by: Tw <wei.tan@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/include/arch/x86/mmu.h

@@ -71,6 +71,10 @@ enum _page_table_level {
 #define PAGE_SIZE_2M	MEM_2M
 #define PAGE_SIZE_1G	MEM_1G
 
+struct cpu_page {
+	uint8_t contents[CPU_PAGE_SIZE];
+};
+
 uint64_t get_paging_pml4(void);
 void *alloc_paging_struct(void);
 void free_paging_struct(void *ptr);