Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 27 Jun 2023 17:31:30 -0700
From:   Isaku Yamahata <isaku.yamahata@gmail.com>
To:     "Huang, Kai" <kai.huang@intel.com>
Cc:     "kirill.shutemov@linux.intel.com" <kirill.shutemov@linux.intel.com>,
        "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
        "Williams, Dan J" <dan.j.williams@intel.com>,
        "Raj, Ashok" <ashok.raj@intel.com>,
        "Luck, Tony" <tony.luck@intel.com>,
        "david@redhat.com" <david@redhat.com>,
        "bagasdotme@gmail.com" <bagasdotme@gmail.com>,
        "Hansen, Dave" <dave.hansen@intel.com>,
        "ak@linux.intel.com" <ak@linux.intel.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Chatre, Reinette" <reinette.chatre@intel.com>,
        "Christopherson,, Sean" <seanjc@google.com>,
        "pbonzini@redhat.com" <pbonzini@redhat.com>,
        "mingo@redhat.com" <mingo@redhat.com>,
        "Yamahata, Isaku" <isaku.yamahata@intel.com>,
        "nik.borisov@suse.com" <nik.borisov@suse.com>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "hpa@zytor.com" <hpa@zytor.com>,
        "peterz@infradead.org" <peterz@infradead.org>,
        "imammedo@redhat.com" <imammedo@redhat.com>,
        "Shahar, Sagi" <sagis@google.com>, "bp@alien8.de" <bp@alien8.de>,
        "Brown, Len" <len.brown@intel.com>,
        "Gao, Chao" <chao.gao@intel.com>,
        "sathyanarayanan.kuppuswamy@linux.intel.com" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        "Huang, Ying" <ying.huang@intel.com>,
        "x86@kernel.org" <x86@kernel.org>, isaku.yamahata@gmail.com
Subject: Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on
 demand
Message-ID: <20230628003130.GB3629671@ls.amr.corp.intel.com>
References: <cover.1687784645.git.kai.huang@intel.com>
 <104d324cd68b12e14722ee5d85a660cccccd8892.1687784645.git.kai.huang@intel.com>
 <20230627095012.ln47s62pqzdrnb7x@box.shutemov.name>
 <d6a0fb32ebcdeb6c38ebe8e2b03f034f42360c0f.camel@intel.com>
 <20230627121853.ek5zr7sfiezfkfyj@box.shutemov.name>
 <9361abfa9bf22c2a1a4b25e5495bcccc5b8dcd43.camel@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <9361abfa9bf22c2a1a4b25e5495bcccc5b8dcd43.camel@intel.com>
Precedence: bulk

On Tue, Jun 27, 2023 at 10:37:58PM +0000,
"Huang, Kai" <kai.huang@intel.com> wrote:

> > > 
> > > +/*
> > > + * Do the module global initialization if not done yet.
> > > + * It's always called with interrupts and preemption disabled.
> > > + */
> > 
> > If interrupts are always disabled why do you need _irqsave()?
> > 
> 
> I'll remove the _irqsave().
> 
> AFAICT Isaku preferred this for additional security, but this is not necessary.

It's because the lockdep complains.  Anyway, it's save to remove _irqsave as
discussed with you.
-- 
Isaku Yamahata <isaku.yamahata@gmail.com>