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HV: refine copy_from_vm/copy_to_vm

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If the target is an array, then only the first element
will be copied.
So replace structure assignment with memcpy_s().

Signed-off-by: Qi Yadong <yadong.qi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Qi Yadong
2018-05-16 13:47:02 +08:00
committed by lijinxia
parent 30549a59c7
commit 2ea3b49858
2 changed files with 33 additions and 29 deletions
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12
hypervisor/include/common/hypercall.h
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@@ -366,26 +366,26 @@ static inline int check_result(int found)
return found ? 0 : -1;
}
#define copy_from_vm(vm, ptr, gpa) ({ \
#define copy_from_vm(vm, ptr, gpa, size) ({ \
int found = 0; \
typeof(*(ptr)) *h_ptr = (ptr); \
typeof(*(ptr)) *g_ptr = \
HPA2HVA(gpa2hpa_check(vm, gpa, \
sizeof(*h_ptr), &found, true)); \
size, &found, true)); \
if (found) { \
*h_ptr = *g_ptr; \
memcpy_s(h_ptr, size, g_ptr, size); \
} \
check_result(found); \
})
#define copy_to_vm(vm, ptr, gpa) ({ \
#define copy_to_vm(vm, ptr, gpa, size) ({ \
int found = 0; \
typeof(*(ptr)) *h_ptr = (ptr); \
typeof(*(ptr)) *g_ptr = \
HPA2HVA(gpa2hpa_check(vm, gpa, \
sizeof(*h_ptr), &found, true)); \
size, &found, true)); \
if (found) { \
*g_ptr = *h_ptr; \
memcpy_s(g_ptr, size, h_ptr, size); \
} \
check_result(found); \
})