linux-kernel - [PATCH v1 2/3] nitro_enclaves: Update documentation for Arm support

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Message-ID: <20210826173451.93165-3-andraprs@amazon.com>
Date:   Thu, 26 Aug 2021 20:34:50 +0300
From:   Andra Paraschiv <andraprs@...zon.com>
To:     linux-kernel <linux-kernel@...r.kernel.org>
CC:     Alexandru Ciobotaru <alcioa@...zon.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        Kamal Mostafa <kamal@...onical.com>,
        "Alexandru Vasile" <lexnv@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        "Stefano Garzarella" <sgarzare@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        kvm <kvm@...r.kernel.org>,
        ne-devel-upstream <ne-devel-upstream@...zon.com>,
        Andra Paraschiv <andraprs@...zon.com>
Subject: [PATCH v1 2/3] nitro_enclaves: Update documentation for Arm support

Add references for hugepages and booting steps for Arm.

Signed-off-by: Andra Paraschiv <andraprs@...zon.com>
---
 Documentation/virt/ne_overview.rst | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/virt/ne_overview.rst b/Documentation/virt/ne_overview.rst
index 39b0c8fe2654a..2777da1fb0ad1 100644
--- a/Documentation/virt/ne_overview.rst
+++ b/Documentation/virt/ne_overview.rst
@@ -43,8 +43,8 @@ for the enclave VM. An enclave does not have persistent storage attached.
 The memory regions carved out of the primary VM and given to an enclave need to
 be aligned 2 MiB / 1 GiB physically contiguous memory regions (or multiple of
 this size e.g. 8 MiB). The memory can be allocated e.g. by using hugetlbfs from
-user space [2][3]. The memory size for an enclave needs to be at least 64 MiB.
-The enclave memory and CPUs need to be from the same NUMA node.
+user space [2][3][7]. The memory size for an enclave needs to be at least
+64 MiB. The enclave memory and CPUs need to be from the same NUMA node.
 
 An enclave runs on dedicated cores. CPU 0 and its CPU siblings need to remain
 available for the primary VM. A CPU pool has to be set for NE purposes by an
@@ -61,7 +61,7 @@ device is placed in memory below the typical 4 GiB.
 The application that runs in the enclave needs to be packaged in an enclave
 image together with the OS ( e.g. kernel, ramdisk, init ) that will run in the
 enclave VM. The enclave VM has its own kernel and follows the standard Linux
-boot protocol [6].
+boot protocol [6][8].
 
 The kernel bzImage, the kernel command line, the ramdisk(s) are part of the
 Enclave Image Format (EIF); plus an EIF header including metadata such as magic
@@ -93,3 +93,5 @@ enclave process can exit.
 [4] https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
 [5] https://man7.org/linux/man-pages/man7/vsock.7.html
 [6] https://www.kernel.org/doc/html/latest/x86/boot.html
+[7] https://www.kernel.org/doc/html/latest/arm64/hugetlbpage.html
+[8] https://www.kernel.org/doc/html/latest/arm64/booting.html
-- 
2.20.1 (Apple Git-117)




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