kvm: x86: Skip TLB flush on fast CR3 switch when indicated by guest

Browse source

When PCIDs are enabled, the MSb of the source operand for a MOV-to-CR3
instruction indicates that the TLB doesn't need to be flushed.

This change enables this optimization for MOV-to-CR3s in the guest
that have been intercepted by KVM for shadow paging and are handled
within the fast CR3 switch path.

Signed-off-by: Junaid Shahid <junaids@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Junaid Shahid 2018-06-27 14:59:15 -07:00 • committed by Paolo Bonzini

parent eb4b248e15

commit ade61e2824

4 changed files with 36 additions and 17 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/x86/include/asm/kvm_host.h

View file

28

arch/x86/kvm/mmu.c

View file

12

arch/x86/kvm/vmx.c

View file

11

arch/x86/kvm/x86.c

View file