linux-kernel - Re: [PATCH v6 11/18] nitro_enclaves: Add logic for setting an enclave memory region

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Message-ID: <76b87d46-88b6-4c00-4ac7-27e5be020a57@amazon.de>
Date:   Mon, 10 Aug 2020 11:54:27 +0200
From:   Alexander Graf <graf@...zon.de>
To:     Andra Paraschiv <andraprs@...zon.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Anthony Liguori <aliguori@...zon.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Colm MacCarthaigh <colmmacc@...zon.com>,
        "David Duncan" <davdunc@...zon.com>,
        Bjoern Doebel <doebel@...zon.de>,
        "David Woodhouse" <dwmw@...zon.co.uk>,
        Frank van der Linden <fllinden@...zon.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Karen Noel <knoel@...hat.com>,
        "Martin Pohlack" <mpohlack@...zon.de>,
        Matt Wilson <msw@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Balbir Singh <sblbir@...zon.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Stewart Smith <trawets@...zon.com>,
        Uwe Dannowski <uwed@...zon.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        kvm <kvm@...r.kernel.org>,
        ne-devel-upstream <ne-devel-upstream@...zon.com>
Subject: Re: [PATCH v6 11/18] nitro_enclaves: Add logic for setting an enclave
 memory region



On 05.08.20 11:10, Andra Paraschiv wrote:
> Another resource that is being set for an enclave is memory. User space
> memory regions, that need to be backed by contiguous memory regions,
> are associated with the enclave.
> 
> One solution for allocating / reserving contiguous memory regions, that
> is used for integration, is hugetlbfs. The user space process that is
> associated with the enclave passes to the driver these memory regions.
> 
> The enclave memory regions need to be from the same NUMA node as the
> enclave CPUs.
> 
> Add ioctl command logic for setting user space memory region for an
> enclave.
> 
> Signed-off-by: Alexandru Vasile <lexnv@...zon.com>
> Signed-off-by: Andra Paraschiv <andraprs@...zon.com>

Reviewed-by: Alexander Graf <graf@...zon.com>


Alex



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