diff options
| author | Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> | 2012-08-21 11:02:51 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-08-22 15:09:03 +0300 |
| commit | 4d8b81abc47b83a1939e59df2fdb0e98dfe0eedd (patch) | |
| tree | 47ea77cb4f77a2884a0478ecf84f62e32e5661ee /include/linux/kvm_host.h | |
| parent | 7068d0971524dd47a38f44f6020ba133432871ca (diff) | |
KVM: introduce readonly memslot
In current code, if we map a readonly memory space from host to guest
and the page is not currently mapped in the host, we will get a fault
pfn and async is not allowed, then the vm will crash
We introduce readonly memory region to map ROM/ROMD to the guest, read access
is happy for readonly memslot, write access on readonly memslot will cause
KVM_EXIT_MMIO exit
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
| -rw-r--r-- | include/linux/kvm_host.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index a913ac709a9d..5972c9845ddb 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -465,6 +465,7 @@ int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); +unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_release_page_clean(struct page *page); void kvm_release_page_dirty(struct page *page); void kvm_set_page_dirty(struct page *page); @@ -792,12 +793,6 @@ hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) return slot->base_gfn + gfn_offset; } -static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, - gfn_t gfn) -{ - return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; -} - static inline gpa_t gfn_to_gpa(gfn_t gfn) { return (gpa_t)gfn << PAGE_SHIFT; |