linux-kernel - Re: [PATCH 06/10] iommu: Remember when default domain type was set on kernel command line

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] [day] [month] [year] [list]

Date:   Thu, 15 Aug 2019 09:19:54 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     corbet@....net, tony.luck@...el.com, fenghua.yu@...el.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        x86@...nel.org, linux-doc@...r.kernel.org,
        linux-ia64@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Thomas.Lendacky@....com,
        Suravee.Suthikulpanit@....com, Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 06/10] iommu: Remember when default domain type was set
 on kernel command line

Hey Lu Baolu,

thanks for your review!

On Thu, Aug 15, 2019 at 01:01:57PM +0800, Lu Baolu wrote:
> > +#define IOMMU_CMD_LINE_DMA_API		(1 << 0)
> 
> Prefer BIT() micro?

Yes, I'll change that.

> > +	iommu_set_cmd_line_dma_api();
> 
> IOMMU command line is also set in other places, for example,
> iommu_setup() (arch/x86/kernel/pci-dma.c). Need to call this there as
> well?

You are right, I'll better add a 'bool cmd_line' parameter to the
iommu_set_default_*() functions and tell the IOMMU core this way. That
will also fix iommu=pt/nopt.

Thanks,

	Joerg