static unsigned long long kvm_createvm_count;
static unsigned long long kvm_active_vms;
+__weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
+ unsigned long start, unsigned long end)
+{
+}
+
bool kvm_is_reserved_pfn(kvm_pfn_t pfn)
{
if (pfn_valid(pfn))
kvm_flush_remote_tlbs(kvm);
spin_unlock(&kvm->mmu_lock);
+
+ kvm_arch_mmu_notifier_invalidate_range(kvm, start, end);
+
srcu_read_unlock(&kvm->srcu, idx);
}
}
static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
+ .flags = MMU_INVALIDATE_DOES_NOT_BLOCK,
.invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
.invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
.clear_flush_young = kvm_mmu_notifier_clear_flush_young,
return gfn_to_hva_memslot_prot(slot, gfn, writable);
}
-static int get_user_page_nowait(unsigned long start, int write,
- struct page **page)
-{
- int flags = FOLL_NOWAIT | FOLL_HWPOISON;
-
- if (write)
- flags |= FOLL_WRITE;
-
- return get_user_pages(start, 1, flags, page, NULL);
-}
-
static inline int check_user_page_hwpoison(unsigned long addr)
{
int rc, flags = FOLL_HWPOISON | FOLL_WRITE;
static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault,
bool *writable, kvm_pfn_t *pfn)
{
- struct page *page[1];
+ unsigned int flags = FOLL_HWPOISON;
+ struct page *page;
int npages = 0;
might_sleep();
if (writable)
*writable = write_fault;
- if (async) {
- down_read(¤t->mm->mmap_sem);
- npages = get_user_page_nowait(addr, write_fault, page);
- up_read(¤t->mm->mmap_sem);
- } else {
- unsigned int flags = FOLL_HWPOISON;
-
- if (write_fault)
- flags |= FOLL_WRITE;
+ if (write_fault)
+ flags |= FOLL_WRITE;
+ if (async)
+ flags |= FOLL_NOWAIT;
- npages = get_user_pages_unlocked(addr, 1, page, flags);
- }
+ npages = get_user_pages_unlocked(addr, 1, &page, flags);
if (npages != 1)
return npages;
/* map read fault as writable if possible */
if (unlikely(!write_fault) && writable) {
- struct page *wpage[1];
+ struct page *wpage;
- npages = __get_user_pages_fast(addr, 1, 1, wpage);
- if (npages == 1) {
+ if (__get_user_pages_fast(addr, 1, 1, &wpage) == 1) {
*writable = true;
- put_page(page[0]);
- page[0] = wpage[0];
+ put_page(page);
+ page = wpage;
}
-
- npages = 1;
}
- *pfn = page_to_pfn(page[0]);
+ *pfn = page_to_pfn(page);
return npages;
}