linux-kernel - Re: [PATCH v33 03/21] x86/mm: x86/sgx: Signal SIGSEGV with PF

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Message-ID: <20200625164939.GF20319@zn.tnic>
Date:   Thu, 25 Jun 2020 18:49:39 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>, x86@...nel.org,
        linux-sgx@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jethro Beekman <jethro@...tanix.com>,
        akpm@...ux-foundation.org, andriy.shevchenko@...ux.intel.com,
        asapek@...gle.com, cedric.xing@...el.com, chenalexchen@...gle.com,
        conradparker@...gle.com, cyhanish@...gle.com,
        dave.hansen@...el.com, haitao.huang@...el.com,
        josh@...htriplett.org, kai.huang@...el.com, kai.svahn@...el.com,
        kmoy@...gle.com, ludloff@...gle.com, luto@...nel.org,
        nhorman@...hat.com, npmccallum@...hat.com, puiterwijk@...hat.com,
        rientjes@...gle.com, tglx@...utronix.de, yaozhangx@...gle.com
Subject: Re: [PATCH v33 03/21] x86/mm: x86/sgx: Signal SIGSEGV with PF_SGX

On Thu, Jun 25, 2020 at 08:34:31AM -0700, Sean Christopherson wrote:
> However, building and running enclaves is complex, and the vast majority of
> SGX enabled applications are expected to leverage a library of one kind or
> another to hand the bulk of the gory details.

I gotta say this rings a bell: dhansen alluded on IRC to the jumping
through hoops one needs to do in order to run SGX enclaves.

...

> The vDSO stuff is in patches 15-18 of this series.
> 
> There's a gigantic thread on all the alternatives that were considered[2].
> 
> [1] https://lkml.kernel.org/r/CALCETrXByb2UVuZ6AXUeOd8y90NAikbZuvdN3wf_TjHZ+CxNhA@mail.gmail.com
> [2] https://lkml.kernel.org/r/CALCETrWdpoDkbZjkucKL91GWpDPG9p=VqYrULade2pFDR7S=GQ@mail.gmail.com

Yeah, that makes it very clear. Thanks a lot for taking the time and
writing it down. I've snipped it for brevity but it is very useful!

Thx!

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette