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Date:   Mon, 3 Jun 2019 17:55:24 -0700
From:   Sean Christopherson <sean.j.christopherson@intel.com>
To:     "Xing, Cedric" <cedric.xing@intel.com>
Cc:     "Hansen, Dave" <dave.hansen@intel.com>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Stephen Smalley <sds@tycho.nsa.gov>,
        James Morris <jmorris@namei.org>,
        "Serge E . Hallyn" <serge@hallyn.com>,
        LSM List <linux-security-module@vger.kernel.org>,
        Paul Moore <paul@paul-moore.com>,
        Eric Paris <eparis@parisplace.org>,
        "selinux@vger.kernel.org" <selinux@vger.kernel.org>,
        Jethro Beekman <jethro@fortanix.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        LKML <linux-kernel@vger.kernel.org>, X86 ML <x86@kernel.org>,
        "linux-sgx@vger.kernel.org" <linux-sgx@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        "nhorman@redhat.com" <nhorman@redhat.com>,
        "npmccallum@redhat.com" <npmccallum@redhat.com>,
        "Ayoun, Serge" <serge.ayoun@intel.com>,
        "Katz-zamir, Shay" <shay.katz-zamir@intel.com>,
        "Huang, Haitao" <haitao.huang@intel.com>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        "Svahn, Kai" <kai.svahn@intel.com>, Borislav Petkov <bp@alien8.de>,
        Josh Triplett <josh@joshtriplett.org>,
        "Huang, Kai" <kai.huang@intel.com>,
        David Rientjes <rientjes@google.com>,
        "Roberts, William C" <william.c.roberts@intel.com>,
        "Tricca, Philip B" <philip.b.tricca@intel.com>
Subject: Re: [RFC PATCH 3/9] x86/sgx: Allow userspace to add multiple pages
 in single ioctl()
Message-ID: <20190604005524.GB24521@linux.intel.com>
References: <20190531233159.30992-1-sean.j.christopherson@intel.com>
 <20190531233159.30992-4-sean.j.christopherson@intel.com>
 <beb8ac7a-b580-8ff2-7467-fb2870fb8cf0@intel.com>
 <20190603203712.GI13384@linux.intel.com>
 <960B34DE67B9E140824F1DCDEC400C0F654ED499@ORSMSX116.amr.corp.intel.com>
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On Mon, Jun 03, 2019 at 04:48:47PM -0700, Xing, Cedric wrote:
> > How about this for the intermediate patch:
> > 
> > 	struct sgx_enclave_add_region {
> > 		__u64	addr;
> > 		__u64	src;
> > 		__u64	size;
> > 		__u64	secinfo;
> > 		__u16	mrmask;
> > 		__u16	reserved16;
> > 		__u32	reserved;
> > 	}
> > 
> > and with the flags field:
> > 
> > 	struct sgx_enclave_add_region {
> > 		__u64	addr;
> > 		__u64	src;
> > 		__u64	size;
> > 		__u64	secinfo;
> > 		__u16	mrmask;
> > 		__u16	flags;
> 
> What is "flags" here?

In the RFC, @flags holds SGX_ALLOW_{READ,WRITE,EXEC}.

> 
> > 		__u32	reserved;
> > 	}