linux-kernel - Re: [PATCH v7 046/102] KVM: x86/tdp_mmu: Support TDX private mapping for TDP MMU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 26 Jul 2022 16:42:03 -0700
From:   Isaku Yamahata <isaku.yamahata@...il.com>
To:     Yuan Yao <yuan.yao@...ux.intel.com>
Cc:     isaku.yamahata@...el.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, isaku.yamahata@...il.com,
        Paolo Bonzini <pbonzini@...hat.com>,
        Kai Huang <kai.huang@...el.com>
Subject: Re: [PATCH v7 046/102] KVM: x86/tdp_mmu: Support TDX private mapping
 for TDP MMU

On Tue, Jul 12, 2022 at 10:36:57AM +0800,
Yuan Yao <yuan.yao@...ux.intel.com> wrote:

> > diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
> > index 62ae590d4e5b..e5b73638bd83 100644
> > --- a/arch/x86/kvm/mmu/paging_tmpl.h
> > +++ b/arch/x86/kvm/mmu/paging_tmpl.h
> > @@ -877,7 +877,7 @@ static int FNAME(page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault
> >
> >  out_unlock:
> >  	write_unlock(&vcpu->kvm->mmu_lock);
> > -	kvm_release_pfn_clean(fault->pfn);
> > +	kvm_mmu_release_fault(vcpu->kvm, fault, r);
> 
> Do we really need this? Shadow page table is not supported for TD guest.

For consistency. pair of kvm_faultin_pfn() and kvm_mmu_release_fault().

-- 
Isaku Yamahata <isaku.yamahata@...il.com>