linux-kernel - Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put callbacks

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 for Android: free password hash cracker in your pocket

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

Date:   Fri, 6 Jan 2017 13:46:31 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Auger Eric <eric.auger@...hat.com>
Cc:     eric.auger.pro@...il.com, christoffer.dall@...aro.org,
        marc.zyngier@....com, robin.murphy@....com,
        alex.williamson@...hat.com, will.deacon@....com,
        tglx@...utronix.de, jason@...edaemon.net,
        linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org,
        drjones@...hat.com, linux-kernel@...r.kernel.org,
        pranav.sawargaonkar@...il.com, iommu@...ts.linux-foundation.org,
        punit.agrawal@....com, diana.craciun@....com, gpkulkarni@...il.com,
        shankerd@...eaurora.org, bharat.bhushan@....com,
        geethasowjanya.akula@...il.com
Subject: Re: [PATCH v6 08/18] iommu/vt-d: Implement reserved region get/put
 callbacks

On Fri, Jan 06, 2017 at 12:45:54PM +0100, Auger Eric wrote:
> On 06/01/2017 12:01, Joerg Roedel wrote:
> > On Thu, Jan 05, 2017 at 07:04:36PM +0000, Eric Auger wrote:

> > That is different from what AMD does, can you also report the RMRR
> > regions for the device here (as direct-map regions)?
> 
> if I return RMRR regions as direct mapped regions,
> iommu_group_create_direct_mappings will perform the 1-1 mapping.

No, this will not happen until the Intel IOMMU driver returns valid
IOMMU_DOMAIN_DMA type domains.

> I am not familiar with the intel-iommu code but I guess this job
> currently is done in the intel driver:
> iommu_prepare_rmrr_dev -> iommu_prepare_identity_map
> ->domain_prepare_identity_map -> iommu_domain_identity_map?

Right, this is done in the Intel driver atm.



	Joerg