From: Jarkko Sakkinen <jarkko@kernel.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org,
linux-sgx@vger.kernel.org, dave.hansen@linux.intel.com
Subject: Re: [PATCH v5] sgx.7: New page with overview of Software Guard eXtensions (SGX)
Date: Mon, 10 May 2021 20:33:09 +0300 [thread overview]
Message-ID: <YJluVfQ2TeO1N/KZ@kernel.org> (raw)
In-Reply-To: <3072f586-4200-a0a1-8c85-fca0102e7913@intel.com>
On Mon, May 10, 2021 at 07:58:27AM -0700, Dave Hansen wrote:
> On 5/10/21 7:52 AM, Jarkko Sakkinen wrote:
> > +This can lead to reserving a large region than required by the payload,
> > +but the address space can be obviously trimmed after the enclave has been
> > +constructed on,
> > +with a sequence of
> > +.BR mmap(MAP_FIXED)
> > +calls.
>
> Sorry if I missed this previously.
>
> But, do we really intend to suggest the use of mmap(MAP_FIXED) for this?
> What's the harm in leaving a non-populated piece of address space of
> mmap()'d /dev/sgx_enclave?
Probably most of the time: not much. Especially since we support 64-bit
only.
Maybe it should be relaxed a bit?
/Jarkko
next prev parent reply other threads:[~2021-05-10 17:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 14:52 [PATCH v5] sgx.7: New page with overview of Software Guard eXtensions (SGX) Jarkko Sakkinen
2021-05-10 14:58 ` Dave Hansen
2021-05-10 17:33 ` Jarkko Sakkinen [this message]
2021-05-11 20:22 ` Reinette Chatre
2021-05-12 1:16 ` Jarkko Sakkinen
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