linux-kernel - RE: [PATCH v10 2/6] x86/sgx: Introduce functions to count the sgx_(vepc

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Message-ID: <DM8PR11MB57509CBF5603A9A0EEE5E01BE723A@DM8PR11MB5750.namprd11.prod.outlook.com>
Date: Mon, 4 Aug 2025 07:18:16 +0000
From: "Reshetova, Elena" <elena.reshetova@...el.com>
To: "Hansen, Dave" <dave.hansen@...el.com>
CC: "jarkko@...nel.org" <jarkko@...nel.org>, "seanjc@...gle.com"
	<seanjc@...gle.com>, "Huang, Kai" <kai.huang@...el.com>, "mingo@...nel.org"
	<mingo@...nel.org>, "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, "Mallick, Asit K"
	<asit.k.mallick@...el.com>, "Scarlata, Vincent R"
	<vincent.r.scarlata@...el.com>, "Cai, Chong" <chongc@...gle.com>, "Aktas,
 Erdem" <erdemaktas@...gle.com>, "Annapurve, Vishal" <vannapurve@...gle.com>,
	"Bondarevska, Nataliia" <bondarn@...gle.com>, "Raynor, Scott"
	<scott.raynor@...el.com>
Subject: RE: [PATCH v10 2/6] x86/sgx: Introduce functions to count the
 sgx_(vepc_)open()



> -----Original Message-----
> From: Hansen, Dave <dave.hansen@...el.com>
> Sent: Friday, August 1, 2025 7:45 PM
> To: Reshetova, Elena <elena.reshetova@...el.com>
> Cc: jarkko@...nel.org; seanjc@...gle.com; Huang, Kai
> <kai.huang@...el.com>; mingo@...nel.org; linux-sgx@...r.kernel.org; linux-
> kernel@...r.kernel.org; x86@...nel.org; Mallick, Asit K
> <asit.k.mallick@...el.com>; Scarlata, Vincent R <vincent.r.scarlata@...el.com>;
> Cai, Chong <chongc@...gle.com>; Aktas, Erdem <erdemaktas@...gle.com>;
> Annapurve, Vishal <vannapurve@...gle.com>; Bondarevska, Nataliia
> <bondarn@...gle.com>; Raynor, Scott <scott.raynor@...el.com>
> Subject: Re: [PATCH v10 2/6] x86/sgx: Introduce functions to count the
> sgx_(vepc_)open()
> 
> On 8/1/25 04:25, Elena Reshetova wrote:
> > Note: the sgx_inc_usage_count prototype is defined to return
> > int for the cleanliness of the follow-up patches. When the
> > EUPDATESVN SGX instruction will be enabled in the follow-up patch,
> > the sgx_inc_usage_count will start to return int.
> 
> Please use parenthesis for function_names().

Sure, will fix. 

> 
> Second, sgx_inc_usage_count() _already_ returns 'int'. Now. In this patch.
> 
> So I'm confused what this is trying to say.
> 
> Is this trying to say that sgx_inc_usage_count() always returns success
> (0) for now, but the future implementation can fail? *That's* why it
> needs to have an 'int' return type.

Yes, I will rephrase this better. 

Best Regards,
Elena.