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Message-ID: <1418814b95d486a68ebce81524d6261f3849a711.camel@intel.com>
Date: Thu, 27 Jul 2023 03:11:50 +0000
From: "Huang, Kai" <kai.huang@...el.com>
To: "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
"x86@...nel.org" <x86@...nel.org>,
"jarkko@...nel.org" <jarkko@...nel.org>,
"Chatre, Reinette" <reinette.chatre@...el.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"bp@...en8.de" <bp@...en8.de>,
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"mingo@...hat.com" <mingo@...hat.com>
CC: "kristen@...ux.intel.com" <kristen@...ux.intel.com>,
"Mehta, Sohil" <sohil.mehta@...el.com>,
"stable@...r.kernel.org" <stable@...r.kernel.org>,
"Hansen, Dave" <dave.hansen@...el.com>,
"Christopherson,, Sean" <seanjc@...gle.com>
Subject: Re: [PATCH v5] x86/sgx: Resolves SECS reclaim vs. page fault for EAUG
race
On Thu, 2023-07-27 at 02:50 +0000, Huang, Kai wrote:
> > An enclave can not run nor generate page faults without a resident SECS
> > page.
> >
>
> I am not sure whether "nor generate page faults without a resident SECS page" is
> accurate? When SECS is swapped out, I suppose the first EENTER should trigger a
> #PF on the TSC page and in the #PF handler the SECS will be swapped in first.
>
> I guess you can just remove this sentence?
Hmm.. Probably I should interpret this sentence as the enclave "code" itself
cannot generate page faults without a resident SECS. This is true. So feel
free to ignore this comment.
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