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HV: Add flush_address_space API.

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flush_address_space is used to flush address space by clflushopt instruction.

Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
Reviewed-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yuan Liu 2019-06-13 18:03:53 +08:00 committed by ACRN System Integration
parent 6fd397e82b
commit f81585eb3d
2 changed files with 25 additions and 0 deletions
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13
hypervisor/arch/x86/mmu.c
View File

@ -294,3 +294,16 @@ void init_paging(void)
/* set ptep in sanitized_page point to itself */ /* set ptep in sanitized_page point to itself */
sanitize_pte((uint64_t *)sanitized_page); sanitize_pte((uint64_t *)sanitized_page);
} }
/*
* @pre: addr != NULL && size != 0
*/
void flush_address_space(void *addr, uint64_t size)
{
uint64_t n = 0UL;
while (n < size) {
clflushopt((char *)addr + n);
n += CACHE_LINE_SIZE;
}
}

12
hypervisor/include/arch/x86/mmu.h
View File

@ -150,6 +150,18 @@ void flush_vpid_single(uint16_t vpid);
* @return None * @return None
*/ */
void flush_vpid_global(void); void flush_vpid_global(void);
/**
* @brief Flush address space
*
* @param[in] addr the specified virtual address
*
* @param[in] size the specified size to flush
*
* @return None
*/
void flush_address_space(void *addr, uint64_t size);
/** /**
* @brief Guest-physical mappings and combined mappings invalidation * @brief Guest-physical mappings and combined mappings invalidation
* *