linux-kernel - Re: [PATCH v1 02/15] nitro_enclaves: Define the PCI device interface

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Message-ID: <b4c58884-987a-0be0-8fa1-9aa8efa3e874@amazon.com>
Date:   Thu, 23 Apr 2020 16:37:44 +0300
From:   "Paraschiv, Andra-Irina" <andraprs@...zon.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, <linux-kernel@...r.kernel.org>
CC:     Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...zon.com>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        Bjoern Doebel <doebel@...zon.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Frank van der Linden <fllinden@...zon.com>,
        Alexander Graf <graf@...zon.de>,
        Martin Pohlack <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>, Balbir Singh <sblbir@...zon.com>,
        Stewart Smith <trawets@...zon.com>,
        Uwe Dannowski <uwed@...zon.de>, <kvm@...r.kernel.org>,
        <ne-devel-upstream@...zon.com>
Subject: Re: [PATCH v1 02/15] nitro_enclaves: Define the PCI device interface



On 22/04/2020 00:22, Paolo Bonzini wrote:
> On 21/04/20 20:41, Andra Paraschiv wrote:
>> The Nitro Enclaves (NE) driver communicates with a new PCI device, that
>> is exposed to a virtual machine (VM) and handles commands meant for
>> handling enclaves lifetime e.g. creation, termination, setting memory
>> regions. The communication with the PCI device is handled using a MMIO
>> space and MSI-X interrupts.
>>
>> This device communicates with the hypervisor on the host, where the VM
>> that spawned the enclave itself run, e.g. to launch a VM that is used
>> for the enclave.
>>
>> Define the MMIO space of the PCI device, the commands that are
>> provided by this device. Add an internal data structure used as private
>> data for the PCI device driver and the functions for the PCI device init
>> / uninit and command requests handling.
>>
>> Signed-off-by: Alexandru-Catalin Vasile <lexnv@...zon.com>
>> Signed-off-by: Alexandru Ciobotaru <alcioa@...zon.com>
>> Signed-off-by: Andra Paraschiv <andraprs@...zon.com>
>> ---
>>   .../virt/amazon/nitro_enclaves/ne_pci_dev.h   | 266 ++++++++++++++++++
>>   1 file changed, 266 insertions(+)
>>   create mode 100644 drivers/virt/amazon/nitro_enclaves/ne_pci_dev.h
> Can this be placed just in drivers/virt/nitro_enclaves, or
> drivers/virt/enclave/nitro?  It's not unlikely that this device be
> implemented outside EC2 sooner or later, and there's nothing
> Amazon-specific as far as I can see from the UAPI.

I can update the path to drivers/virt/nitro_enclaves.

The PCI device in the patch series is registered under Amazon PCI Vendor 
ID and it has this PCI Device ID - 0xe4c1.

Thanks,
Andra




Amazon Development Center (Romania) S.R.L. registered office: 27A Sf. Lazar Street, UBC5, floor 2, Iasi, Iasi County, 700045, Romania. Registered in Romania. Registration number J22/2621/2005.