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

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Message-ID: <f936d026-65cd-2632-2ffa-041d1430fb28@amazon.com>
Date:   Fri, 24 Apr 2020 18:10:54 +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 23/04/2020 16:37, Paraschiv, Andra-Irina wrote:
>
>
> 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.

v2 now includes the updated path - drivers/virt/nitro_enclaves.

Thanks,
Andra




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