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authorPaolo Bonzini <pbonzini@redhat.com>2015-11-13 11:52:45 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2015-11-25 17:24:23 +0100
commit0e3d0648bd903ff6cda7499f9349a2ce612bccb4 (patch)
tree5595b7e53263b89c72d708cf8efdb9bbd05cb405 /virt/kvm/async_pf.c
parentaba2f06c070f604e388cf77b1dcc7f4cf4577eb0 (diff)
downloadlinux-sh-0e3d0648bd903ff6cda7499f9349a2ce612bccb4.tar.gz
KVM: x86: MMU: always set accessed bit in shadow PTEs
Commit 7a1638ce4220 ("nEPT: Redefine EPT-specific link_shadow_page()", 2013-08-05) says: Since nEPT doesn't support A/D bit, we should not set those bit when building the shadow page table. but this is not necessary. Even though nEPT doesn't support A/D bits, and hence the vmcs12 EPT pointer will never enable them, we always use them for shadow page tables if available (see construct_eptp in vmx.c). So we can set the A/D bits freely in the shadow page table. This patch hence basically reverts commit 7a1638ce4220. Cc: Yang Zhang <yang.z.zhang@Intel.com> Cc: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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