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Date:   Wed, 12 Jun 2019 08:23:42 -0700
From:   Sean Christopherson <sean.j.christopherson@intel.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     linux-sgx@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
        Cedric Xing <cedric.xing@intel.com>,
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        "Dr . Greg Wettstein" <greg@enjellic.com>
Subject: Re: [PATCH 7/7] x86/sgx: Add a reserved field to
 sgx_enclave_add_region to drop 'packed'
Message-ID: <20190612152341.GE20308@linux.intel.com>
References: <20190605194845.926-1-sean.j.christopherson@intel.com>
 <20190605194845.926-8-sean.j.christopherson@intel.com>
 <20190612151439.GA5723@linux.intel.com>
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On Wed, Jun 12, 2019 at 06:14:39PM +0300, Jarkko Sakkinen wrote:
> On Wed, Jun 05, 2019 at 12:48:45PM -0700, Sean Christopherson wrote:
> > A reserved field could prove useful in the future, and packed structs
> > can result in inefficiencies due to its impact on alignment.
> > 
> > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> 
> Rather should extend mrmask just to 32 bits.

I considered that option, but extending mrmask would probably confusing
to userspace, e.g. we'd have to document that bits 31:15 are ignored.