Re: [PATCH 3/4] KVM: nVMX: Don't flush TLB when vmcs12 uses VPID

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



----- jmattson@xxxxxxxxxx wrote:

> On Tue, May 22, 2018 at 7:16 AM, Liran Alon <liran.alon@xxxxxxxxxx>
> wrote:
> 
> > +       /*
> > +        * If vmcs01 don't use VPID, CPU flushes TLB on every
> > +        * VMEntry/VMExit. Thus, no need to flush TLB.
> > +        *
> > +        * If vmcs12 uses VPID, TLB entries populated by L2 are
> > +        * tagged with vmx->nested.vpid02 while L1 entries are
> tagged
> > +        * with vmx->vpid. Thus, no need to flush TLB.
> > +        *
> 
> Furthermore, If vmcs12 uses EPT, TLB entries populated by L2 are
> tagged with the vmcs02 EP4TA while L1 entries are tagged with the
> vmcs01 EP4TA. Thus, no need to flush the TLB.

I agree. But let's do that as a separate patch on top of this patch.
To make each patch more readable and handle one issue at a time.




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux