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From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Tom Murphy <tmurphy-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>
Cc: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>,
	Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
	David Brown <david.brown-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Thierry Reding
	<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	linux-s390-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Krzysztof Kozlowski
	<krzk-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Jonathan Hunter
	<jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	Kukjin Kim <kgene-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Matthias Brugger
	<matthias.bgg-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Gerald Schaefer
	<gerald.schaefer-tA70FqPdS9bQT0dZR+AlfA@public.gmane.org>,
	Andy Gross <andy.gross-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	murphyt7-/Zw1syy4LHg@public.gmane.org,
	iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>
Subject: Re: [PATCH v3 1/4] iommu: Add gfp parameter to iommu_ops::map
Date: Tue, 4 Jun 2019 22:50:21 -0700	[thread overview]
Message-ID: <20190605055021.GA15036@infradead.org> (raw)
In-Reply-To: <20190506185207.31069-2-tmurphy-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>

On Mon, May 06, 2019 at 07:52:03PM +0100, Tom Murphy via iommu wrote:
> We can remove the mutex lock from amd_iommu_map and amd_iommu_unmap.
> iommu_map doesn’t lock while mapping and so no two calls should touch
> the same iova range. The AMD driver already handles the page table page
> allocations without locks so we can safely remove the locks.

Btw, this really should be a separate patch.

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  parent reply	other threads:[~2019-06-05  5:50 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-06 18:52 [PATCH v3 0/4] iommu/amd: Convert the AMD iommu driver to the dma-iommu api Tom Murphy via iommu
     [not found] ` <20190506185207.31069-1-tmurphy-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>
2019-05-06 18:52   ` [PATCH v3 1/4] iommu: Add gfp parameter to iommu_ops::map Tom Murphy via iommu
2019-06-04 18:11     ` Robin Murphy
2019-06-04 20:55       ` Tom Murphy
     [not found]       ` <33a1e3c1-1906-9e45-d060-e7998424973b-5wv7dgnIgG8@public.gmane.org>
2019-06-04 21:24         ` Rob Clark
     [not found]     ` <20190506185207.31069-2-tmurphy-nzgTgzXrdUbQT0dZR+AlfA@public.gmane.org>
2019-06-05  5:50       ` Christoph Hellwig [this message]
2019-05-06 18:52   ` [PATCH v3 3/4] iommu/dma-iommu: Use the dev->coherent_dma_mask Tom Murphy via iommu
2019-05-06 18:52 ` [PATCH v3 2/4] iommu/dma-iommu: Handle deferred devices Tom Murphy
2019-05-07  6:40   ` Christoph Hellwig
2019-05-15 12:46     ` Tom Murphy
2019-05-06 18:52 ` [PATCH v3 4/4] iommu/amd: Convert AMD iommu driver to the dma-iommu api Tom Murphy
2019-06-03 10:51 ` [PATCH v3 0/4] iommu/amd: Convert the " Joerg Roedel
2019-06-03 11:27   ` Tom Murphy

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