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HV: enable SMEP in hypervisor

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- this patch is to enable SMEP in hypervisor, SMEP protects
   guests' memory from supervisor-mode instruction fetches,
   in other words, hypervisor which operating in supervisor
   mode can't fetch instructions from (guests' memory)
   linear addresses that are accessible in user mode.

Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
This commit is contained in:
Yonghua Huang
2018-06-14 18:22:51 +08:00
committed by Jack Ren
parent b2b49a64a9
commit 098c2e6788
4 changed files with 40 additions and 7 deletions
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1
hypervisor/include/arch/x86/mmu.h
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@@ -299,6 +299,7 @@ bool check_mmu_1gb_support(int page_table_type);
void *alloc_paging_struct(void);
void free_paging_struct(void *ptr);
void enable_paging(uint64_t pml4_base_addr);
void enable_smep(void);
void init_paging(void);
int map_mem(struct map_params *map_params, void *paddr, void *vaddr,
uint64_t size, uint32_t flags);