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VR_AP_USER: memory range flag to respect user mempolicy (e.g., in PF handler)

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This commit is contained in:
Balazs Gerofi
2017-01-12 16:39:49 +09:00
parent a18fd1f45c
commit fdbdcbd0ee
3 changed files with 10 additions and 2 deletions
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7
kernel/process.c
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@@ -1652,7 +1652,9 @@ static int page_fault_process_memory_range(struct process_vm *vm, struct vm_rang
retry:
npages = pgsize / PAGE_SIZE;
virt = ihk_mc_alloc_aligned_pages(npages, p2align, IHK_MC_AP_NOWAIT);
virt = ihk_mc_alloc_aligned_pages(npages, p2align,
IHK_MC_AP_NOWAIT |
(range->flag & VR_AP_USER) ? IHK_MC_AP_USER : 0);
if (!virt && !range->pgshift && (pgsize != PAGE_SIZE)) {
error = arch_get_smaller_page_size(NULL, pgsize, &pgsize, &p2align);
if (error) {
@@ -1685,7 +1687,7 @@ retry:
attr = arch_vrflag_to_ptattr(range->flag | memobj_flag, reason, ptep);
/*****/
/* Copy on write */
if (((range->flag & VR_PRIVATE) ||
((reason & PF_PATCH) && !(range->flag & VR_PROT_WRITE)))
&& ((!page && phys == NOPHYS) || (page &&
@@ -1940,6 +1942,7 @@ int init_process_stack(struct thread *thread, struct program_load_desc *pn,
memset(stack, 0, minsz);
vrflag = VR_STACK | VR_DEMAND_PAGING;
vrflag |= (__flag ? VR_AP_USER : 0);
vrflag |= PROT_TO_VR_FLAG(pn->stack_prot);
vrflag |= VR_MAXPROT_READ | VR_MAXPROT_WRITE | VR_MAXPROT_EXEC;
#define NOPHYS ((uintptr_t)-1)