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Date: Mon, 15 Apr 2024 15:58:11 -0700
From: Isaku Yamahata <isaku.yamahata@intel.com>
To: Binbin Wu <binbin.wu@linux.intel.com>
Cc: isaku.yamahata@intel.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, isaku.yamahata@gmail.com,
	Paolo Bonzini <pbonzini@redhat.com>, erdemaktas@google.com,
	Sean Christopherson <seanjc@google.com>,
	Sagi Shahar <sagis@google.com>, Kai Huang <kai.huang@intel.com>,
	chen.bo@intel.com, hang.yuan@intel.com, tina.zhang@intel.com,
	isaku.yamahata@linux.intel.com
Subject: Re: [PATCH v19 098/130] KVM: TDX: Add a place holder to handle TDX
 VM exit
Message-ID: <20240415225811.GU3039520@ls.amr.corp.intel.com>
References: <cover.1708933498.git.isaku.yamahata@intel.com>
 <88920c598dcb55c15219642f27d0781af6d0c044.1708933498.git.isaku.yamahata@intel.com>
 <4ccb3a98-d732-421e-a013-8912b46d8107@linux.intel.com>
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On Tue, Apr 09, 2024 at 06:36:01PM +0800,
Binbin Wu <binbin.wu@linux.intel.com> wrote:

> > +		return 1;
> > +
> > +	/*
> > +	 * TDH.VP.ENTRY
> 
> "TDH.VP.ENTRY" -> "TDH.VP.ENTER"
> 
> >   checks TD EPOCH which contend with TDH.MEM.TRACK and
> > +	 * vcpu TDH.VP.ENTER.
> Do you mean TDH.VP.ENTER on one vcpu can contend with TDH.MEM.TRACK and
> TDH.VP.ENTER on another vcpu?

Yes.  The caller of TDH.MEM.TRACK() must ensure that other vCPUS go through
inactive (not running vCPU) after TDH.MEM.TRACK().
-- 
Isaku Yamahata <isaku.yamahata@intel.com>