| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <7f9bf073f04d4ba6b0d98f6189d951bc@inspur.com>
Date: Fri, 28 Mar 2025 03:26:27 +0000
From: Bo Liu (刘波)-浪潮信息
<liubo03@...pur.com>
To: "kristen.c.accardi@...el.com" <kristen.c.accardi@...el.com>,
"vinicius.gomes@...el.com" <vinicius.gomes@...el.com>
CC: "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Dou zhi chong Dou (窦志冲) <douzhichong@...pur.com>
Subject: Intel IAA issue consultation
Hi Kristen:
We recently encountered issues when using Intel IAA (In-Memory Analytics Accelerator) for data decompression in the Linux kernel. Specifically, while using the iaa_crypto driver, decompression fails when processing large datasets composed of non-contiguous memory pages. Initially, we attempted to address this by using scatterlists (SGLs), but decompression still failed. After analyzing the iaa_crypto driver code, we discovered that non-contiguous pages require enabling IOMMU to map them into a single virtual contiguous memory block for the device. However, while this approach worked for small numbers of non-contiguous pages, it failed for larger quantities due to IOMMU limitations in mapping fragmented pages into a unified virtual address space.
We would like to consult with you
Is it possible to use iaa_crypto for decompression with numerous non-contiguous pages?
If yes, what modifications are required to resolve the IOMMU mapping constraints?
Thanks,
Bo Liu.
Download attachment "smime.p7s" of type "application/pkcs7-signature" (3777 bytes)
Powered by blists - more mailing lists