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From:   "Xing, Cedric" <cedric.xing@intel.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "x86@kernel.org" <x86@kernel.org>,
        "linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
        "Christopherson, Sean J" <sean.j.christopherson@intel.com>
CC:     "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
        "Hansen, Dave" <dave.hansen@intel.com>,
        "nhorman@redhat.com" <nhorman@redhat.com>,
        "npmccallum@redhat.com" <npmccallum@redhat.com>,
        "Ayoun, Serge" <serge.ayoun@intel.com>,
        "Katz-zamir, Shay" <shay.katz-zamir@intel.com>,
        "Huang, Haitao" <haitao.huang@intel.com>,
        "andriy.shevchenko@linux.intel.com" 
        <andriy.shevchenko@linux.intel.com>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "Svahn, Kai" <kai.svahn@intel.com>, "bp@alien8.de" <bp@alien8.de>,
        "josh@joshtriplett.org" <josh@joshtriplett.org>,
        "luto@kernel.org" <luto@kernel.org>,
        "Huang, Kai" <kai.huang@intel.com>,
        "rientjes@google.com" <rientjes@google.com>,
        Andy Lutomirski <luto@amacapital.net>,
        Dave Hansen <dave.hansen@linux.intel.com>
Subject: RE: [PATCH v20 22/28] x86/traps: Attempt to fixup exceptions in
 vDSO before signaling
Thread-Topic: [PATCH v20 22/28] x86/traps: Attempt to fixup exceptions in
 vDSO before signaling
Thread-Index: AQHVK2zZgzHDWzFJwEGh+L3RXyNlXaav93CQ
Date:   Thu, 27 Jun 2019 20:32:58 +0000
Message-ID: <960B34DE67B9E140824F1DCDEC400C0F6551B873@ORSMSX116.amr.corp.intel.com>
References: <20190417103938.7762-1-jarkko.sakkinen@linux.intel.com>
 <20190417103938.7762-23-jarkko.sakkinen@linux.intel.com>
 <20190625154341.GA7046@linux.intel.com>
In-Reply-To: <20190625154341.GA7046@linux.intel.com>
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> From: linux-sgx-owner@vger.kernel.org [mailto:linux-sgx-
> owner@vger.kernel.org] On Behalf Of Jarkko Sakkinen
> Sent: Tuesday, June 25, 2019 8:44 AM
> 
> I went through the vDSO changes just to revisit couple of details that I
> had forgotten. Sean, if you don't mind I'd squash this and prepending
> patch.

Just a reminder that #DB/#BP shall be treated differently because they are used by debuggers. So instead of branching to the fixup address, the kernel shall just signal the process. 

> 
> Is there any obvious reason why #PF fixup is in its own patch and the
> rest are collected to the same patch? I would not find it confusing if
> there was one patch per exception but really don't get this division.
> 
> /Jarkko