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memclear: non-temporal memory clean (arm64)

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Change-Id: I8f80ff20e98bc01088450282e1790c27c67c16eb
This commit is contained in:
Balazs Gerofi
2020-05-27 16:15:55 +09:00
committed by Masamichi Takagi
parent 201f5ce500
commit e056cb799f
3 changed files with 53 additions and 9 deletions
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15
kernel/process.c
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@ -1466,17 +1466,14 @@ int add_process_memory_range(struct process_vm *vm,
/* Clear content! */
if (phys != NOPHYS && !(flag & (VR_REMOTE | VR_DEMAND_PAGING))
&& ((flag & VR_PROT_MASK) != VR_PROT_NONE)) {
#if 1
memset((void *)phys_to_virt(phys), 0, end - start);
if (!zero_at_free) {
#ifdef ARCH_MEMCLEAR
memclear((void *)phys_to_virt(phys), end - start);
#else
if (end - start < (1024*1024)) {
memset((void*)phys_to_virt(phys), 0, end - start);
}
else {
memset_smp(&cpu_local_var(current)->cpu_set,
(void *)phys_to_virt(phys), 0, end - start);
}
memset((void *)phys_to_virt(phys), 0, end - start);
#endif
}
}
/* Return range object if requested */