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From:   Jethro Beekman <jethro@fortanix.com>
To:     Sean Christopherson <sean.j.christopherson@intel.com>
CC:     Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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Subject: Re: [PATCH v20 15/28] x86/sgx: Add the Linux SGX Enclave Driver
Thread-Topic: [PATCH v20 15/28] x86/sgx: Add the Linux SGX Enclave Driver
Thread-Index: AQHU9Qombksy6NSZXkyI7LD5DH8ik6ZIwveAgAGrtoCAABATgIAACnGA
Date:   Wed, 24 Apr 2019 01:04:21 +0000
Message-ID: <77cface6-dcc4-7e26-9910-ea9d13152531@fortanix.com>
References: <20190417103938.7762-1-jarkko.sakkinen@linux.intel.com>
 <20190417103938.7762-16-jarkko.sakkinen@linux.intel.com>
 <20190422215831.GL1236@linux.intel.com>
 <6dd981a7-0e38-1273-45c1-b2c0d8bf6fed@fortanix.com>
 <20190424002653.GB14422@linux.intel.com>
In-Reply-To: <20190424002653.GB14422@linux.intel.com>
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On 2019-04-23 17:26, Sean Christopherson wrote:
> On Tue, Apr 23, 2019 at 11:29:24PM +0000, Jethro Beekman wrote:
>> On 2019-04-22 14:58, Sean Christopherson wrote:
>>> Now that the core SGX code is approaching stability, I'd like to star=
t
>>> sending RFCs for the EPC virtualization and KVM bits to hash out that=
 side
>>> of things.  The ACPI crud is the last chunk of code that would requir=
e
>>> non-trivial changes to the core SGX code for the proposed virtualizat=
ion
>>> implementation.  I'd strongly prefer to get it out of the way before
>>> sending the KVM RFCs.
>>
>> What kind of changes? Wouldn't KVM just be another consumer of the sam=
e API
>> used by the driver?
>=20
> Nope, userspace "only" needs to be able to mmap() arbitrary chunks of E=
PC.

I don't think this is sufficient. Don't you need enclave tracking in=20
order to support paging?

--
Jethro Beekman | Fortanix


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