]> git.baikalelectronics.ru Git - kernel.git/commit
nEPT: Fix cr3 handling in nested exit and entry
authorNadav Har'El <nyh@il.ibm.com>
Mon, 5 Aug 2013 08:07:07 +0000 (11:07 +0300)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 7 Aug 2013 13:57:34 +0000 (15:57 +0200)
commit35b65f7237cef5cbb0625ce2c833852b3b08bf13
tree272bfb48835cc3d86a1541e6e9b73b027158ce82
parentc1f630b01edb75554bcc323f9896f45174a11816
nEPT: Fix cr3 handling in nested exit and entry

The existing code for handling cr3 and related VMCS fields during nested
exit and entry wasn't correct in all cases:

If L2 is allowed to control cr3 (and this is indeed the case in nested EPT),
during nested exit we must copy the modified cr3 from vmcs02 to vmcs12, and
we forgot to do so. This patch adds this copy.

If L0 isn't controlling cr3 when running L2 (i.e., L0 is using EPT), and
whoever does control cr3 (L1 or L2) is using PAE, the processor might have
saved PDPTEs and we should also save them in vmcs12 (and restore later).

Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Jun Nakajima <jun.nakajima@intel.com>
Signed-off-by: Xinhao Xu <xinhao.xu@intel.com>
Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx.c