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KVM: Return EFAULT from kvm ioctl when guest accesses bad area

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Currently if guest access address that belongs to memory slot but is not
backed up by page or page is read only KVM treats it like MMIO access.
Remove that capability. It was never part of the interface and should
not be relied upon.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2010-07-07 20:16:45 +03:00 • committed by Avi Kivity
parent fa7bff8f8a
commit edba23e515
3 changed files with 28 additions and 5 deletions
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1
include/linux/kvm_host.h
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@ -269,6 +269,7 @@ extern pfn_t bad_pfn;
int is_error_page(struct page *page);
int is_error_pfn(pfn_t pfn);
int is_hwpoison_pfn(pfn_t pfn);
int is_fault_pfn(pfn_t pfn);
int kvm_is_error_hva(unsigned long addr);
int kvm_set_memory_region(struct kvm *kvm,
struct kvm_userspace_memory_region *mem,