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authorBandan Das <bsd@redhat.com>2017-05-05 15:25:14 -0400
committerPaolo Bonzini <pbonzini@redhat.com>2017-05-09 11:54:22 +0200
commitc5f983f6e8455bbff8b6b39f3ad470317fcd808e (patch)
tree129db6f8f2d391f4f0cc1fcb25c2d77565abacb2 /virt
parentbab4165e2f031905bd0a2bb8b6ad65c5c8cfa870 (diff)
downloadlinux-c5f983f6e8455bbff8b6b39f3ad470317fcd808e.tar.bz2
nVMX: Implement emulated Page Modification Logging
With EPT A/D enabled, processor access to L2 guest paging structures will result in a write violation. When this happens, write the GUEST_PHYSICAL_ADDRESS to the pml buffer provided by L1 if the access is write and the dirty bit is being set. This patch also adds necessary checks during VMEntry if L1 has enabled PML. If the PML index overflows, we change the exit reason and run L1 to simulate a PML full event. Signed-off-by: Bandan Das <bsd@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
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