From: Jarkko Sakkinen <jarkko@kernel.org>
To: linux-sgx@vger.kernel.org
Cc: dave.hansen@linux.intel.com, reinette.chatre@intel.com
Subject: Re: Odd looking #PF fault code
Date: Tue, 05 Apr 2022 00:32:35 +0300 [thread overview]
Message-ID: <2ad3f46e4cb6298da0b04a2f338d13e9dcca1c78.camel@kernel.org> (raw)
In-Reply-To: <YkoyvdqIqkaOk8NL@kernel.org>
On Mon, 2022-04-04 at 02:50 +0300, Jarkko Sakkinen wrote:
> I get this when trying to get EAUG-EACCEPTCOPY to run on Enarx and I get:
>
> Unexpected PF: address: 0x007f7fff910000, error code 0x15
>
> I'm using patches from:
>
> https://github.com/rchatre/linux/tree/sgx/sgx2_submitted_v2_plus_rwx
>
> Fault code is in other words PROT|WRITE|USER|RSVD.
>
> According to arch/x86/kernel/fault.c:
>
> /*
> * Reserved bits are never expected to be set on
> * entries in the user portion of the page tables.
> */
> if (unlikely(error_code & X86_PF_RSVD))
> pgtable_bad(regs, error_code, address);
>
> Any clue how this fault code could emit?
>
> [*] https://github.com/enarx/enarx/pull/1608
>
> BR, Jarkko
Oops, off-by-one, I bit is set, not RSVD :-)
BR, Jarkko
prev parent reply other threads:[~2022-04-04 21:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-03 23:50 Odd looking #PF fault code Jarkko Sakkinen
2022-04-04 16:27 ` Reinette Chatre
2022-04-05 5:59 ` Jarkko Sakkinen
2022-04-04 21:32 ` Jarkko Sakkinen [this message]
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