linux-kernel - RE: [PATCH v3 3/5] iommu/sva: Stop using ioasid

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 22 Feb 2023 02:22:48 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        Jason Gunthorpe <jgg@...dia.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "Jean-Philippe Brucker" <jean-philippe@...aro.com>
CC:     Robin Murphy <robin.murphy@....com>, Will Deacon <will@...nel.org>,
        "David Woodhouse" <dwmw2@...radead.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "X86 Kernel" <x86@...nel.org>, "Jiang, Dave" <dave.jiang@...el.com>
Subject: RE: [PATCH v3 3/5] iommu/sva: Stop using ioasid_set for SVA

> From: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> Sent: Friday, February 17, 2023 8:00 AM
>
> +	ret = ida_alloc_range(&iommu_global_pasid_ida, min, max,
> GFP_KERNEL);
> +	if (ret < min)
> +		goto out;

ioasid_alloc() currently uses GFP_ATOMIC.

since this is kind of a replacement w/o functional impact, it'd be cleaner
from bisect p.o.v. to have a separate patch changing GFP_ATOMIC
to GFP_KERNEL in ioasid_alloc() and then this patch.