linux-kernel - Re: [PATCH v20 16/28] x86/sgx: Add provisioning

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Message-ID: <20190423143309.GB26642@linux.intel.com>
Date:   Tue, 23 Apr 2019 17:33:09 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     "Huang, Kai" <kai.huang@...el.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-sgx@...r.kernel.org" <linux-sgx@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "Svahn, Kai" <kai.svahn@...el.com>,
        "nhorman@...hat.com" <nhorman@...hat.com>,
        "jmorris@...ei.org" <jmorris@...ei.org>,
        "Christopherson, Sean J" <sean.j.christopherson@...el.com>,
        "josh@...htriplett.org" <josh@...htriplett.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "Ayoun, Serge" <serge.ayoun@...el.com>,
        "Huang, Haitao" <haitao.huang@...el.com>,
        "linux-security-module@...r.kernel.org" 
        <linux-security-module@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "npmccallum@...hat.com" <npmccallum@...hat.com>,
        "rientjes@...gle.com" <rientjes@...gle.com>,
        "luto@...nel.org" <luto@...nel.org>,
        "Katz-zamir, Shay" <shay.katz-zamir@...el.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "serge@...lyn.com" <serge@...lyn.com>,
        "andriy.shevchenko@...ux.intel.com" 
        <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v20 16/28] x86/sgx: Add provisioning

On Fri, Apr 19, 2019 at 03:06:48AM +0000, Huang, Kai wrote:
> On Wed, 2019-04-17 at 13:39 +0300, Jarkko Sakkinen wrote:
> > In order to provide a mechanism for devilering provisoning rights:
> > 
> > 1. Add a new device file /dev/sgx/provision that works as a token for
> >    allowing an enclave to have the provisioning privileges.
> > 2. Add a new ioctl called SGX_IOC_ENCLAVE_SET_ATTRIBUTE that accepts the
> >    following data structure:
> > 
> >    struct sgx_enclave_set_attribute {
> >            __u64 addr;
> >            __u64 attribute_fd;
> >    };
> > 
> > A daemon could sit on top of /dev/sgx/provision and send a file
> > descriptor of this file to a process that needs to be able to provision
> > enclaves.
> > 
> > The way this API is used is straight-forward. Lets assume that dev_fd is
> > a handle to /dev/sgx/enclave and prov_fd is a handle to
> > /dev/sgx/provision.  You would allow SGX_IOC_ENCLAVE_CREATE to
> > initialize an enclave with the PROVISIONKEY attribute by
> > 
> > params.addr = <enclave address>;
> > params.token_fd = prov_fd;
> > 
> Should be params.attribute_fd = prov_fd;
> 
> Thanks,
> -Kai

Thanks.

/Jarkko