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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: linux-sgx@vger.kernel.org
Subject: Re: [PATCH for v24 v2 4/4] x86/sgx: add @count to &sgx_enclave_add_pages
Date: Thu, 7 Nov 2019 01:20:30 +0200
Message-ID: <20191106232030.GA13378@linux.intel.com> (raw)
In-Reply-To: <20191105225223.GC23297@linux.intel.com>

On Tue, Nov 05, 2019 at 02:52:23PM -0800, Sean Christopherson wrote:
> On Tue, Nov 05, 2019 at 01:20:56PM +0200, Jarkko Sakkinen wrote:
> > Add @count write the number of bytes added as there is not any good reason
> > to overwrite input parameters.
> 
> I disagree, overwriting the params means userspace doesn't need to adjust
> the values to restart the ioctl().  Ditto for printing out the failing
> address if the ioctl() fails.

There is three redundant updates. At least only @length must be
updated in order to remove this glitch.

As far as overwriting goes, it should be only done when there is
requiring to do that.

/Jarkko

  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-05 11:20 [PATCH for v24 v2 1/4] x86/sgx: Destroy enclave if EADD fails Jarkko Sakkinen
2019-11-05 11:20 ` [PATCH for v24 v2 2/4] x86/sgx: Remove a subordinate clause Jarkko Sakkinen
2019-11-06 22:03   ` Jarkko Sakkinen
2019-11-05 11:20 ` [PATCH for v24 v2 3/4] x86/sgx: Detach sgx_encl_add_page() from struct sgx_enclave_add_pages Jarkko Sakkinen
2019-11-05 11:20 ` [PATCH for v24 v2 4/4] x86/sgx: add @count to &sgx_enclave_add_pages Jarkko Sakkinen
2019-11-05 22:52   ` Sean Christopherson
2019-11-06 23:20     ` Jarkko Sakkinen [this message]
2019-11-08  8:13       ` Jarkko Sakkinen
2019-11-05 22:58 ` [PATCH for v24 v2 1/4] x86/sgx: Destroy enclave if EADD fails Sean Christopherson
2019-11-06 23:26   ` Jarkko Sakkinen

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