linux-kernel - Re: [PATCH v6 1/6] iommu: Add cache_invalidate

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Date: Mon, 8 Jan 2024 15:32:55 +0800
From: Binbin Wu <binbin.wu@...ux.intel.com>
To: Yi Liu <yi.l.liu@...el.com>
Cc: joro@...tes.org, alex.williamson@...hat.com, jgg@...dia.com,
 kevin.tian@...el.com, robin.murphy@....com, baolu.lu@...ux.intel.com,
 cohuck@...hat.com, eric.auger@...hat.com, nicolinc@...dia.com,
 kvm@...r.kernel.org, mjrosato@...ux.ibm.com, chao.p.peng@...ux.intel.com,
 yi.y.sun@...ux.intel.com, peterx@...hat.com, jasowang@...hat.com,
 shameerali.kolothum.thodi@...wei.com, lulu@...hat.com,
 suravee.suthikulpanit@....com, iommu@...ts.linux.dev,
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
 zhenzhong.duan@...el.com, joao.m.martins@...cle.com, xin.zeng@...el.com,
 yan.y.zhao@...el.com
Subject: Re: [PATCH v6 1/6] iommu: Add cache_invalidate_user op



On 11/17/2023 9:07 PM, Yi Liu wrote:
> From: Lu Baolu <baolu.lu@...ux.intel.com>
>
> The updates of the PTEs in the nested page table will be propagated to the
> hardware caches on both IOMMU (IOTLB) and devices (DevTLB/ATC).
>
> Add a new domain op cache_invalidate_user for the userspace to flush the
> hardware caches for a nested domain through iommufd. No wrapper for it,
> as it's only supposed to be used by iommufd. Then, pass in invalidation
> requests in form of a user data array conatining a number of invalidation

s/conatining/containing/
> data entries.
>