linux-kernel - Re: [PATCH v3 06/16] iommufd/hw_pagetable: Allow viommu->ops->cache_invalidate for hwpt

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Message-ID: <20241017185408.GU3559746@nvidia.com>
Date: Thu, 17 Oct 2024 15:54:08 -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, aik@....com, patches@...ts.linux.dev
Subject: Re: [PATCH v3 06/16] iommufd/hw_pagetable: Allow
 viommu->ops->cache_invalidate for hwpt_nested

On Wed, Oct 09, 2024 at 09:38:18AM -0700, Nicolin Chen wrote:
> Now cache entries for hwpt_nested can be invalidated via the vIOMMU's
> cache_invalidate op alternatively. Allow iommufd_hwpt_nested_alloc to
> support such a case.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  drivers/iommu/iommufd/hw_pagetable.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)

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

Jason