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From: Joerg Roedel <joro@8bytes.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: will@kernel.org, linux-kernel@vger.kernel.org, murphyt7@tcd.ie,
	iommu@lists.linux-foundation.org, dwmw2@infradead.org
Subject: Re: [PATCH] iommu/dma: Resurrect the "forcedac" option
Date: Thu, 18 Mar 2021 10:55:44 +0100	[thread overview]
Message-ID: <YFMjoKaSHZ+ilQDa@8bytes.org> (raw)
In-Reply-To: <7eece8e0ea7bfbe2cd0e30789e0d46df573af9b0.1614961776.git.robin.murphy@arm.com>

On Fri, Mar 05, 2021 at 04:32:34PM +0000, Robin Murphy wrote:
> In converting intel-iommu over to the common IOMMU DMA ops, it quietly
> lost the functionality of its "forcedac" option. Since this is a handy
> thing both for testing and for performance optimisation on certain
> platforms, reimplement it under the common IOMMU parameter namespace.
> 
> For the sake of fixing the inadvertent breakage of the Intel-specific
> parameter, remove the dmar_forcedac remnants and hook it up as an alias
> while documenting the transition to the new common parameter.
> 
> Fixes: c588072bba6b ("iommu/vt-d: Convert intel iommu driver to the iommu ops")
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 15 ++++++++-------
>  drivers/iommu/dma-iommu.c                       | 13 ++++++++++++-
>  drivers/iommu/intel/iommu.c                     |  5 ++---
>  include/linux/dma-iommu.h                       |  2 ++
>  4 files changed, 24 insertions(+), 11 deletions(-)

Applied for v5.13, thanks.
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WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro@8bytes.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: iommu@lists.linux-foundation.org, dwmw2@infradead.org,
	baolu.lu@linux.intel.com, murphyt7@tcd.ie, john.garry@huawei.com,
	thunder.leizhen@huawei.com, will@kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/dma: Resurrect the "forcedac" option
Date: Thu, 18 Mar 2021 10:55:44 +0100	[thread overview]
Message-ID: <YFMjoKaSHZ+ilQDa@8bytes.org> (raw)
In-Reply-To: <7eece8e0ea7bfbe2cd0e30789e0d46df573af9b0.1614961776.git.robin.murphy@arm.com>

On Fri, Mar 05, 2021 at 04:32:34PM +0000, Robin Murphy wrote:
> In converting intel-iommu over to the common IOMMU DMA ops, it quietly
> lost the functionality of its "forcedac" option. Since this is a handy
> thing both for testing and for performance optimisation on certain
> platforms, reimplement it under the common IOMMU parameter namespace.
> 
> For the sake of fixing the inadvertent breakage of the Intel-specific
> parameter, remove the dmar_forcedac remnants and hook it up as an alias
> while documenting the transition to the new common parameter.
> 
> Fixes: c588072bba6b ("iommu/vt-d: Convert intel iommu driver to the iommu ops")
> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 15 ++++++++-------
>  drivers/iommu/dma-iommu.c                       | 13 ++++++++++++-
>  drivers/iommu/intel/iommu.c                     |  5 ++---
>  include/linux/dma-iommu.h                       |  2 ++
>  4 files changed, 24 insertions(+), 11 deletions(-)

Applied for v5.13, thanks.

  parent reply	other threads:[~2021-03-18  9:55 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-05 16:32 [PATCH] iommu/dma: Resurrect the "forcedac" option Robin Murphy
2021-03-05 16:32 ` Robin Murphy
2021-03-05 17:41 ` John Garry
2021-03-05 17:41   ` John Garry
2021-03-08 13:08   ` Robin Murphy
2021-03-08 13:08     ` Robin Murphy
2021-03-08 14:54     ` John Garry
2021-03-08 14:54       ` John Garry
2021-03-08  1:51 ` Lu Baolu
2021-03-08  1:51   ` Lu Baolu
2021-03-11 15:25 ` John Garry
2021-03-11 15:25   ` John Garry
2021-03-18  9:55 ` Joerg Roedel [this message]
2021-03-18  9:55   ` Joerg Roedel

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