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move_pages(): parallel implementation v1

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This commit is contained in:
Balazs Gerofi
2017-05-12 09:28:52 +09:00
parent 06f824c829
commit 4c0f401424
3 changed files with 412 additions and 131 deletions
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31
arch/x86/kernel/memory.c
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@ -2263,6 +2263,37 @@ int getint_user(int *dest, const int *p)
return 0;
}
int verify_process_vm(struct process_vm *vm,
const void *usrc, size_t size)
{
const uintptr_t ustart = (uintptr_t)usrc;
const uintptr_t uend = ustart + size;
uint64_t reason;
uintptr_t addr;
int error = 0;
if ((ustart < vm->region.user_start)
|| (vm->region.user_end <= ustart)
|| ((vm->region.user_end - ustart) < size)) {
kprintf("%s: error: out of user range\n", __FUNCTION__);
return -EFAULT;
}
reason = PF_USER; /* page not present */
for (addr = ustart & PAGE_MASK; addr < uend; addr += PAGE_SIZE) {
if (!addr)
return -EINVAL;
error = page_fault_process_vm(vm, (void *)addr, reason);
if (error) {
kprintf("%s: error: PF for %p failed\n", __FUNCTION__, addr);
return error;
}
}
return error;
}
int read_process_vm(struct process_vm *vm, void *kdst, const void *usrc, size_t siz)
{
const uintptr_t ustart = (uintptr_t)usrc;