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MM: introduction of ihk_mc_pt_lookup_fault_pte()

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This commit is contained in:
Balazs Gerofi
2018-04-25 16:15:26 +09:00
parent 91d732308d
commit a3aa96af19
2 changed files with 27 additions and 2 deletions
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24
arch/x86_64/kernel/memory.c
View File

@ -1987,6 +1987,28 @@ out:
return ptep; return ptep;
} }
pte_t *ihk_mc_pt_lookup_fault_pte(struct process_vm *vm, void *virt,
int pgshift, void **basep, size_t *sizep, int *p2alignp)
{
int faulted = 0;
pte_t *ptep;
retry:
ptep = ihk_mc_pt_lookup_pte(vm->address_space->page_table,
virt, pgshift, basep, sizep, p2alignp);
if (!faulted && (!ptep || !pte_is_present(ptep))) {
page_fault_process_vm(vm, virt, PF_POPULATE | PF_USER);
faulted = 1;
goto retry;
}
if (faulted && ptep && pte_is_present(ptep)) {
kprintf("%s: successfully faulted 0x%lx\n", __FUNCTION__, virt);
}
return ptep;
}
pte_t *ihk_mc_pt_lookup_pte(page_table_t pt, void *virt, int pgshift, pte_t *ihk_mc_pt_lookup_pte(page_table_t pt, void *virt, int pgshift,
void **basep, size_t *sizep, int *p2alignp) void **basep, size_t *sizep, int *p2alignp)
{ {
@ -2286,7 +2308,7 @@ out:
int ihk_mc_pt_set_range(page_table_t pt, struct process_vm *vm, void *start, int ihk_mc_pt_set_range(page_table_t pt, struct process_vm *vm, void *start,
void *end, uintptr_t phys, enum ihk_mc_pt_attribute attr, void *end, uintptr_t phys, enum ihk_mc_pt_attribute attr,
int pgshift, struct vm_range *range) int pgshift, struct vm_range *range)
{ {
int error; int error;
struct set_range_args args; struct set_range_args args;

5
lib/include/ihk/mm.h
View File

@ -176,7 +176,10 @@ int ihk_mc_pt_free_range(page_table_t pt, struct process_vm *vm,
int ihk_mc_pt_change_attr_range(page_table_t pt, void *start, void *end, int ihk_mc_pt_change_attr_range(page_table_t pt, void *start, void *end,
enum ihk_mc_pt_attribute clrattr, enum ihk_mc_pt_attribute clrattr,
enum ihk_mc_pt_attribute setattr); enum ihk_mc_pt_attribute setattr);
pte_t *ihk_mc_pt_lookup_pte(page_table_t pt, void *virt, int pgshift, void **pgbasep, size_t *pgsizep, int *p2alignp); pte_t *ihk_mc_pt_lookup_pte(page_table_t pt, void *virt, int pgshift,
void **pgbasep, size_t *pgsizep, int *p2alignp);
pte_t *ihk_mc_pt_lookup_fault_pte(struct process_vm *vm, void *virt,
int pgshift, void **basep, size_t *sizep, int *p2alignp);
int ihk_mc_pt_set_range(page_table_t pt, struct process_vm *vm, void *start, int ihk_mc_pt_set_range(page_table_t pt, struct process_vm *vm, void *start,
void *end, uintptr_t phys, enum ihk_mc_pt_attribute attr, void *end, uintptr_t phys, enum ihk_mc_pt_attribute attr,
int pgshift, struct vm_range *range); int pgshift, struct vm_range *range);