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From: Catalin Marinas <catalin.marinas@arm.com>
To: Stefano Stabellini <sstabellini@kernel.org>
Cc: xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com,
	jgross@suse.com, hch@lst.de, will@kernel.org,
	Stefano Stabellini <stefano.stabellini@xilinx.com>
Subject: Re: [PATCH v2 2/3] arm64: do not set SWIOTLB_NO_FORCE when swiotlb is required
Date: Fri, 14 May 2021 11:29:54 +0100	[thread overview]
Message-ID: <20210514102953.GA855@arm.com> (raw)
In-Reply-To: <20210512201823.1963-2-sstabellini@kernel.org>

On Wed, May 12, 2021 at 01:18:22PM -0700, Stefano Stabellini wrote:
> From: Christoph Hellwig <hch@lst.de>
> Although SWIOTLB_NO_FORCE is meant to allow later calls to swiotlb_init,
> today dma_direct_map_page returns error if SWIOTLB_NO_FORCE.
> For now, without a larger overhaul of SWIOTLB_NO_FORCE, the best we can
> do is to avoid setting SWIOTLB_NO_FORCE in mem_init when we know that it
> is going to be required later (e.g. Xen requires it).
> CC: boris.ostrovsky@oracle.com
> CC: jgross@suse.com
> CC: catalin.marinas@arm.com
> CC: will@kernel.org
> CC: linux-arm-kernel@lists.infradead.org
> Fixes: 2726bf3ff252 ("swiotlb: Make SWIOTLB_NO_FORCE perform no allocation")
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

  parent reply	other threads:[~2021-05-14 10:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-12 20:18 [PATCH v2 0/3] swiotlb-xen init fixes Stefano Stabellini
2021-05-12 20:18 ` [PATCH v2 1/3] xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h Stefano Stabellini
2021-05-13  6:10   ` Christoph Hellwig
2021-05-14  9:59   ` Juergen Gross
2021-05-12 20:18 ` [PATCH v2 2/3] arm64: do not set SWIOTLB_NO_FORCE when swiotlb is required Stefano Stabellini
2021-05-14 10:00   ` Juergen Gross
2021-05-14 10:29   ` Catalin Marinas [this message]
2021-05-12 20:18 ` [PATCH v2 3/3] xen/swiotlb: check if the swiotlb has already been initialized Stefano Stabellini
2021-05-13  6:11   ` Christoph Hellwig
2021-05-14 13:56 ` [PATCH v2 0/3] swiotlb-xen init fixes Juergen Gross

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