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authorPaolo Bonzini <pbonzini@redhat.com>2013-09-09 13:52:33 +0200
committerGleb Natapov <gleb@redhat.com>2013-09-17 12:52:31 +0300
commitba6a3541545542721ce821d1e7e5ce35752e6fdf (patch)
treeb53ff602454f383dc8148d38d7d870972d7866db /arch/x86/kvm/vmx.c
parent3261107ebfd8f6bba57cfcdb89385779fd149a00 (diff)
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KVM: mmu: allow page tables to be in read-only slots
Page tables in a read-only memory slot will currently cause a triple fault because the page walker uses gfn_to_hva and it fails on such a slot. OVMF uses such a page table; however, real hardware seems to be fine with that as long as the accessed/dirty bits are set. Save whether the slot is readonly, and later check it when updating the accessed and dirty bits. Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Reviewed-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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