Re: [PATCH] KVM: x86: Check for invalid/obsolete root *after* making MMU pages available

[Sergey Senozhatsky <senozhatsky@chromium.org>]

On (26/08/10 15:47), Sean Christopherson wrote:
[..]
> is_page_fault_stale() needs be checked for the TDP MMU as well.  I had the
> pleasure of doing this cherry-pick for an internal kernel, this is what I thought
> yielded the easiest-to-read sequence:

I knew it!

>         if (is_tdp_mmu_fault) {
>                 read_lock(&vcpu->kvm->mmu_lock);
>         } else {
>                 write_lock(&vcpu->kvm->mmu_lock);
> 
>                 r = make_mmu_pages_available(vcpu);
>                 if (r)
>                         goto out_unlock;
>         }
> 
>         if (is_page_fault_stale(vcpu, fault, mmu_seq)) {
>                 r = RET_PF_RETRY;
>                 goto out_unlock;
>         }
> 
>         if (is_tdp_mmu_fault)
>                 r = kvm_tdp_mmu_map(vcpu, fault);
>         else
>                 r = __direct_map(vcpu, fault);
> 
> As a diff...

Sean, can I trouble you with a request to submit your cherry-pick to 6.1.y?