linux-kernel - Re: [PATCH v2 09/19] iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT

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]

Message-ID: <20240905161041.GR1358970@nvidia.com>
Date: Thu, 5 Sep 2024 13:10:41 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: kevin.tian@...el.com, will@...nel.org, joro@...tes.org,
	suravee.suthikulpanit@....com, robin.murphy@....com,
	dwmw2@...radead.org, baolu.lu@...ux.intel.com, shuah@...nel.org,
	linux-kernel@...r.kernel.org, iommu@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kselftest@...r.kernel.org, eric.auger@...hat.com,
	jean-philippe@...aro.org, mdf@...nel.org, mshavit@...gle.com,
	shameerali.kolothum.thodi@...wei.com, smostafa@...gle.com,
	yi.l.liu@...el.com
Subject: Re: [PATCH v2 09/19] iommufd: Allow hwpt_id to carry viommu_id for
 IOMMU_HWPT_INVALIDATE

On Tue, Aug 27, 2024 at 09:59:46AM -0700, Nicolin Chen wrote:
> With a VIOMMU object, use space can flush any IOMMU related cache that can
> be directed using the viommu. It is similar to IOMMU_HWPT_INVALIDATE uAPI,
> but can cover a wider range than IOTLB, such as device cache or desciprtor
> cache.
> 
> Allow hwpt_id of the iommu_hwpt_invalidate structure to carry a viommu_id,
> and reuse the IOMMU_HWPT_INVALIDATE uAPI for VIOMMU invalidations. Driver
> can define a different structure for VIOMMU invalidations v.s. HWPT ones.
> 
> Update the uAPI, kdoc, and selftest case accordingly.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  drivers/iommu/iommufd/hw_pagetable.c    | 32 +++++++++++++++++++------
>  include/uapi/linux/iommufd.h            |  9 ++++---
>  tools/testing/selftests/iommu/iommufd.c |  4 ++--
>  3 files changed, 33 insertions(+), 12 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason