From: Christoph Hellwig <hch@infradead.org>
To: Li Chen <me@linux.beauty>
Cc: Christoph Hellwig <hch@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
devicetree <devicetree@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>
Subject: Re: [PATCH 0/4] add struct page and Direct I/O support to reserved memory
Date: Mon, 11 Jul 2022 09:09:55 -0700 [thread overview]
Message-ID: <YsxLU66tNvi10c82@infradead.org> (raw)
In-Reply-To: <181ee01d384.b809bd01412268.496620746959082770@linux.beauty>
On Tue, Jul 12, 2022 at 12:05:06AM +0800, Li Chen wrote:
> My use case has been stated in the cover letter, but our driver is not ready for upstream yet.
Which means we can't review the use case. I'd suggest you come back
when you submit your driver.
> With DMA allocator, we can access buffer in kernel space, not userspace, however, this patch
Take a look at dma_mmap_* on how to map DMA coherent allocations to
usersapce. This is of course easily possible.
next prev parent reply other threads:[~2022-07-11 16:10 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-11 12:24 [PATCH 0/4] add struct page and Direct I/O support to reserved memory Li Chen
2022-07-11 12:24 ` [PATCH 1/4] of: add struct page support to rmem Li Chen
2022-07-11 13:36 ` Arnd Bergmann
2022-07-11 14:51 ` Li Chen
2022-07-11 15:06 ` Arnd Bergmann
2022-07-12 3:13 ` Li Chen
2022-07-16 0:38 ` kernel test robot
2022-07-18 13:21 ` Dan Carpenter
2022-07-11 12:24 ` [PATCH 2/4] mm/sparse: skip no-map memblock check when fill_subsection_map Li Chen
2022-07-11 14:53 ` David Hildenbrand
2022-07-12 4:23 ` Li Chen
2022-07-12 7:31 ` David Hildenbrand
2022-07-12 9:31 ` Li Chen
2022-07-14 18:45 ` kernel test robot
2022-07-11 12:24 ` [PATCH 3/4] arm64: mm: move memblock_clear_nomap after __add_pages Li Chen
2022-07-11 12:24 ` [PATCH 4/4] sample/reserved_mem: Introduce a sample of struct page and dio support to no-map rmem Li Chen
2022-07-11 13:28 ` Arnd Bergmann
2022-07-12 0:26 ` Li Chen
2022-07-12 7:50 ` Arnd Bergmann
2022-07-12 9:58 ` Li Chen
2022-07-12 10:08 ` Arnd Bergmann
2022-07-12 10:20 ` Arnd Bergmann
2022-07-12 10:55 ` Li Chen
2022-07-12 12:10 ` Arnd Bergmann
2022-08-04 7:17 ` Li Chen
2022-08-04 8:24 ` Arnd Bergmann
2022-08-04 10:07 ` Li Chen
2022-08-05 14:09 ` Arnd Bergmann
2022-08-05 15:28 ` David Hildenbrand
2022-07-11 15:01 ` [PATCH 0/4] add struct page and Direct I/O support to reserved memory Christoph Hellwig
2022-07-11 16:05 ` Li Chen
2022-07-11 16:09 ` Christoph Hellwig [this message]
2022-07-12 0:14 ` Li Chen
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