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[5.6,127/161] KVM: nSVM: leave ASID aside in copy_vmcb_control_area

Message ID 20200616153112.411554722@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH June 16, 2020, 3:35 p.m. UTC 
From: Paolo Bonzini <pbonzini@redhat.com>

commit 6c0238c4a62b3a0b1201aeb7e33a4636d552a436 upstream.

Restoring the ASID from the hsave area on VMEXIT is wrong, because its
value depends on the handling of TLB flushes.  Just skipping the field in
copy_vmcb_control_area will do.

Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/kvm/svm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -3326,7 +3326,7 @@  static inline void copy_vmcb_control_are
 	dst->iopm_base_pa         = from->iopm_base_pa;
 	dst->msrpm_base_pa        = from->msrpm_base_pa;
 	dst->tsc_offset           = from->tsc_offset;
-	dst->asid                 = from->asid;
+	/* asid not copied, it is handled manually for svm->vmcb.  */
 	dst->tlb_ctl              = from->tlb_ctl;
 	dst->int_ctl              = from->int_ctl;
 	dst->int_vector           = from->int_vector;