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From: Reinette Chatre <>
To: Jarkko Sakkinen <>,
	Michael Kerrisk <>
Cc: <>, <>,
	<>, <>
Subject: Re: [PATCH v10] sgx.7: New page with overview of Software Guard eXtensions (SGX)
Date: Mon, 13 Dec 2021 11:51:36 -0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Jarkko,

On 12/11/2021 7:19 AM, Jarkko Sakkinen wrote:
> On Wed, 2021-12-08 at 14:11 -0800, Reinette Chatre wrote:
>> On 11/30/2021 9:50 AM, Jarkko Sakkinen wrote:


>>> +.EX
>>> +.B #include <asm/sgx.h>
>>> +.PP
>>> +.IB enclave " = open(""/dev/sgx_enclave", " O_RDWR);"
>> I view the man page output using "man -l man7/sgx.7" and when I do so
>> the above line is unbalanced: "enclave" and (unexpectedly) the comma are
>> underlined and the line is displayed with a single instance of a double
>> quote: enclave = open("/dev/sgx_enclave, O_RDWR);
> After some trial and error, and looking at symlink.7, this seems to
> fix it:
> -.IB enclave " = open(""/dev/sgx_enclave", " O_RDWR);"
> +.IB enclave " = open(""/dev/sgx_enclave"", O_RDWR);"
> Does this fix for you?

Yes, thank you. When looking at your updated patch I see that only 
enclave is underlined and the quotes are matching.


>>> +is called with higher protections than those defined during the build,
>>> +it will return
>>> +.B -EACCES.
>>> +If
>>> +is called after
>>> +.BR mmap (2)
>>> +with lower protections,
>>> +the caller receives
>>> +.BR SIGBUS,
>>> +once it accesses the page for the first time.
>>> +The SGX feature was added in Linux 5.11.
>> This does not document the SGX_IOC_VEPC_REMOVE ioctl that was added in
>> v5.16. How do you envision additions to this page as new features are
>> added to the Linux support of SGX?
> I started this before any of KVM stuff was in upstream. It'd be better
> to get the basic ioctl's done first. I cannot really give estimate for
> vepc at this point.

SGX_IOC_VEPC_REMOVE_ALL can be found in v5.16.

> For future features (e.g. SGX2), the expectation is that the feature is
> supported by an associated man page update.

ok, thank you.


  reply	other threads:[~2021-12-13 19:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-30 17:50 [PATCH v10] sgx.7: New page with overview of Software Guard eXtensions (SGX) Jarkko Sakkinen
2021-12-08 22:11 ` Reinette Chatre
2021-12-11 15:19   ` Jarkko Sakkinen
2021-12-13 19:51     ` Reinette Chatre [this message]
2021-12-22  0:39       ` Jarkko Sakkinen

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