Re: [PATCH 0/2] KVM: nVMX: Skip IPBP on nested VMCS switch

From: Paolo Bonzini
Date: Thu May 07 2020 - 07:58:43 EST


On 07/05/20 01:58, Sean Christopherson wrote:
> Or as Jim would say, "Really skip IPBP on nested VMCS switch" :-D
>
> Patch 1 is the delta between kvm/queue and v3 of the original patch[*],
> i.e. I just cherry-picked v3 and fixed the conflicts.
>
> Patch 2 applies the "no IPBP" logic to copy_vmcs02_to_vmcs12_rare().
>
> Feel free to sqaush both of these to commit 7407a52f23732 ("KVM: nVMX:
> Skip IBPB when switching between vmcs01 and vmcs02") if you so desire.

I squashed patch 1 and applied patch 2 separately. Thanks!

Paolo

> [*] https://lkml.kernel.org/r/20200505044644.16563-1-sean.j.christopherson@xxxxxxxxx
>
> Sean Christopherson (2):
> KVM: nVMX: Refactor IBPB handling on VMCS switch to genericize code
> KVM: nVMX: Skip IPBP when switching between vmcs01 and vmcs02, redux
>
> arch/x86/kvm/vmx/nested.c | 13 +++----------
> arch/x86/kvm/vmx/vmx.c | 19 ++++++++++++++-----
> arch/x86/kvm/vmx/vmx.h | 4 ++--
> 3 files changed, 19 insertions(+), 17 deletions(-)
>