diff options
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/kvm_main.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 4856a7d..002fe0b 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1028,6 +1028,15 @@ static pfn_t get_fault_pfn(void) return fault_pfn; } +static inline int check_user_page_hwpoison(unsigned long addr) +{ + int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; + + rc = __get_user_pages(current, current->mm, addr, 1, + flags, NULL, NULL, NULL); + return rc == -EHWPOISON; +} + static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic, bool *async, bool write_fault, bool *writable) { @@ -1075,7 +1084,7 @@ static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic, return get_fault_pfn(); down_read(¤t->mm->mmap_sem); - if (is_hwpoison_address(addr)) { + if (check_user_page_hwpoison(addr)) { up_read(¤t->mm->mmap_sem); get_page(hwpoison_page); return page_to_pfn(hwpoison_page); |