KVM: vmx: always initialize HOST_{FS,GS}_BASE to zero during setup

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The HOST_{FS,GS}_BASE fields are guaranteed to be written prior to
VMENTER, by way of vmx_prepare_switch_to_guest().  Initialize the
fields to zero for 64-bit kernels instead of pulling the base values
from their respective MSRs.  In addition to eliminating two RDMSRs,
vmx_prepare_switch_to_guest() can safely assume the initial value of
the fields is zero in all cases.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2018-07-23 12:32:48 -07:00 • committed by Paolo Bonzini

parent d7ee039e2b

commit f3bbc0dced

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arch/x86/kvm/vmx.c

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