From: Christoph Hellwig <hch@lst.de>
To: John Stultz <jstultz@google.com>
Cc: "Christoph Hellwig" <hch@lst.de>,
"Pintu Agarwal" <pintu.ping@gmail.com>,
"Pintu Kumar" <quic_pintu@quicinc.com>,
linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
linux-mm@kvack.org, m.szyprowski@samsung.com,
robin.murphy@arm.com, iommu@lists.linux.dev,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Benjamin Gaignard" <benjamin.gaignard@collabora.com>,
"Liam Mark" <lmark@codeaurora.org>,
"Laura Abbott" <labbott@redhat.com>,
"Brian Starkey" <Brian.Starkey@arm.com>,
"Christian König" <christian.koenig@amd.com>,
linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org,
linaro-mm-sig@lists.linaro.org
Subject: Re: [PATCH v2] dma-contiguous: define proper name for global cma region
Date: Wed, 2 Aug 2023 11:47:25 +0200 [thread overview]
Message-ID: <20230802094725.GA28241@lst.de> (raw)
In-Reply-To: <CANDhNCq+3OEosUcQJ5GFgk+5OyG+JqXKM43UAo0aPz-V27OgAA@mail.gmail.com>
On Tue, Aug 01, 2023 at 10:39:04PM -0700, John Stultz wrote:
> So, forgive me, I've not had a chance to look into this, but my
> recollection was "reserved" is the name we see on x86, but other names
> are possibly provided via the dts node?
Indeed, dma_contiguous_default_area can also be set through
rmem_cma_setup, which then takes the name from DT.
> I believe on the hikey board its "linux,cma" is the name, so forcing
> it to reserved would break that.
>
> Maybe instead add a compat config option to force the cma name (so x86
> can set it to "default" if needed)?
I think we'll just need to leave it as-is. I with dma-heaps had never
exposed the name to userspace, but we'll have to lіve with it now.
next prev parent reply other threads:[~2023-08-02 9:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-28 18:08 [PATCH] dma-contiguous: define proper name for global cma region Pintu Kumar
2023-07-29 2:35 ` [PATCH v2] " Pintu Kumar
2023-07-31 11:21 ` Christoph Hellwig
2023-08-01 17:12 ` Pintu Agarwal
2023-08-01 17:18 ` Christoph Hellwig
2023-08-02 5:39 ` John Stultz
2023-08-02 9:47 ` Christoph Hellwig [this message]
2023-08-03 17:34 ` Pintu Agarwal
2023-08-09 15:04 ` Pintu Agarwal
2023-08-10 0:57 ` John Stultz
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