From: Joerg Roedel <joro@8bytes.org>
To: Vasant Hegde <vasant.hegde@amd.com>
Cc: iommu@lists.linux.dev, will@kernel.org, robin.murphy@arm.com,
suravee.suthikulpanit@amd.com
Subject: Re: [PATCH v2 08/10] iommu/amd: Convert dev_data lock from spinlock to mutex
Date: Tue, 15 Oct 2024 10:43:34 +0200 [thread overview]
Message-ID: <Zw4rNoSwn6n-Z0n1@8bytes.org> (raw)
In-Reply-To: <20240910065812.6091-9-vasant.hegde@amd.com>
On Tue, Sep 10, 2024 at 06:58:10AM +0000, Vasant Hegde wrote:
> Currently in attach device path it takes dev_data->spinlock. But as per
> design attach device path can sleep. Also if device is PRI capable then
> it adds device to IOMMU fault handler queue which takes mutex. Hence
> currently PRI enablement is done outside dev_data lock.
>
> Covert dev_data lock from spinlock to mutex so that it follows the
> design and also PRI enablement can be done properly.
>
> Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
> ---
> drivers/iommu/amd/amd_iommu_types.h | 2 +-
> drivers/iommu/amd/iommu.c | 14 +++++++-------
> 2 files changed, 8 insertions(+), 8 deletions(-)
Pending on the clarification for the lock inversion change:
Reviewed-by: Joerg Roedel <jroedel@suse.de>
next prev parent reply other threads:[~2024-10-15 8:43 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-10 6:58 [PATCH v2 00/10] iommu/amd: Improve domain allocator and device attach code path Vasant Hegde
2024-09-10 6:58 ` [PATCH v2 01/10] iommu/amd: Use ida interface to manage protection domain ID Vasant Hegde
2024-10-15 8:38 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 02/10] iommu/amd: Remove protection_domain.dev_cnt variable Vasant Hegde
2024-10-15 8:39 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 03/10] iommu/amd: xarray to track protection_domain->iommu list Vasant Hegde
2024-10-15 8:39 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 04/10] iommu/amd: Remove unused amd_iommus variable Vasant Hegde
2024-10-15 8:39 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 05/10] iommu/amd: Do not detach devices in domain free path Vasant Hegde
2024-10-15 8:40 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 06/10] iommu/amd: Reduce domain lock scope in attach device path Vasant Hegde
2024-10-15 8:38 ` Joerg Roedel
2024-10-15 12:30 ` Vasant Hegde
2024-10-15 16:12 ` Jason Gunthorpe
2024-10-15 16:45 ` Vasant Hegde
2024-10-15 17:01 ` Jason Gunthorpe
2024-10-16 10:13 ` Vasant Hegde
2024-09-10 6:58 ` [PATCH v2 07/10] iommu/amd: Rearrange attach device code Vasant Hegde
2024-10-15 8:41 ` Joerg Roedel
2024-09-10 6:58 ` [PATCH v2 08/10] iommu/amd: Convert dev_data lock from spinlock to mutex Vasant Hegde
2024-10-15 8:43 ` Joerg Roedel [this message]
2024-09-10 6:58 ` [PATCH v2 09/10] iommu/amd: Reorder attach device code Vasant Hegde
2024-10-15 8:44 ` Joerg Roedel
2024-10-15 16:42 ` Vasant Hegde
2024-09-10 6:58 ` [PATCH v2 10/10] iommu/amd: Improve amd_iommu_release_device() Vasant Hegde
2024-10-15 8:45 ` Joerg Roedel
2024-10-04 14:24 ` [PATCH v2 00/10] iommu/amd: Improve domain allocator and device attach code path Vasant Hegde
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