From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "Dmitry Torokhov" <dmitry.torokhov@gmail.com>,
"Matt Fleming" <matt@codeblueprint.co.uk>,
"Will Deacon" <will.deacon@arm.com>,
"Michal Hocko" <mhocko@kernel.org>,
"David Howells" <dhowells@redhat.com>,
"David Brown" <david.brown@linaro.org>,
"Peter Jones" <pjones@redhat.com>,
"Luis R. Rodriguez" <mcgrof@kernel.org>,
"H . Peter Anvin" <hpa@zytor.com>,
"open list:ANDROID DRIVERS" <devel@driverdev.osuosl.org>,
"Nicolas Broeking" <nbroeking@me.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"the arch/x86 maintainers" <x86@kernel.org>,
"Arve Hjønnevåg" <arve@android.com>,
"Ingo Molnar" <mingo@redhat.com>,
"Kalle Valo" <kvalo@codeaurora.org>,
"Andy Gross" <andy.gross@linaro.org>,
"Darren Hart" <dvhart@infradead.org>,
"Mimi Zohar" <zohar@linux.vnet.ibm.com>,
platform-driver-x86@vger.kernel.org,
"Arend Van Spriel" <arend.vanspriel@broadcom.com>,
"Todd Kjos" <tkjos@android.com>, "Kees Cook" <keescook@ch>
Subject: Re: Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()?
Date: Thu, 7 Jun 2018 00:55:22 +0200 [thread overview]
Message-ID: <20180606225522.GL4511@wotan.suse.de> (raw)
In-Reply-To: <CAKv+Gu_AYCmEzfSoXfgJ2RbAfuadsBYWXuZdpTvCtJT3btzW4w@mail.gmail.com>
On Thu, Jun 07, 2018 at 12:41:12AM +0200, Ard Biesheuvel wrote:
> On 7 June 2018 at 00:29, Luis R. Rodriguez <mcgrof@kernel.org> wrote:
> > Given no one is providing a clear answer, and we cannot easily describe the
> > buffer at run time we'll just move forward with READING_FIRMWARE_DMA_COHERENT.
>
> I seriously wonder whether the QCOM code cannot switch to the
> streaming API instead. That is generally preferred anyway (for
> performance, although that should not matter for loading firmware) but
> also removes this single wart for which we have to invent new flags
> and new security code plus the associated validation overhead.
Given 1 month and no response I don't think we can count on that at this point.
Luis
--
Do not panic
next prev parent reply other threads:[~2018-06-06 22:55 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-08 17:40 [PATCH v3 0/5] efi/firmware/platform-x86: Add EFI embedded fw support Hans de Goede
2018-04-08 17:40 ` [PATCH v3 1/5] efi: Export boot-services code and data as debugfs-blobs Hans de Goede
2018-04-16 8:23 ` Ard Biesheuvel
2018-04-16 8:23 ` Ard Biesheuvel
2018-04-24 13:11 ` Hans de Goede
2018-04-24 13:11 ` Hans de Goede
2018-04-23 11:55 ` Greg Kroah-Hartman
2018-04-23 11:55 ` Greg Kroah-Hartman
2018-04-08 17:40 ` [PATCH v3 2/5] efi: Add embedded peripheral firmware support Hans de Goede
2018-04-16 8:28 ` Ard Biesheuvel
2018-04-16 8:28 ` Ard Biesheuvel
2018-04-24 13:17 ` Hans de Goede
2018-04-24 13:17 ` Hans de Goede
2018-04-17 0:17 ` Luis R. Rodriguez
2018-04-17 0:17 ` Luis R. Rodriguez
2018-04-17 8:58 ` Hans de Goede
2018-04-17 8:58 ` Hans de Goede
2018-04-17 9:19 ` Hans de Goede
2018-04-17 9:19 ` Hans de Goede
2018-04-23 21:11 ` Luis R. Rodriguez
2018-04-23 21:11 ` Luis R. Rodriguez
2018-04-24 15:09 ` Hans de Goede
2018-04-24 15:09 ` Hans de Goede
2018-04-24 16:07 ` Mimi Zohar
2018-04-24 16:07 ` Mimi Zohar
2018-04-24 18:33 ` Hans de Goede
2018-04-24 18:33 ` Hans de Goede
2018-04-24 23:42 ` Luis R. Rodriguez
2018-04-24 23:42 ` Luis R. Rodriguez
2018-04-24 23:42 ` Luis R. Rodriguez
2018-04-25 5:00 ` Mimi Zohar
2018-04-25 5:00 ` Mimi Zohar
2018-04-25 5:00 ` Mimi Zohar
2018-04-25 17:55 ` Luis R. Rodriguez
2018-04-25 17:55 ` Luis R. Rodriguez
2018-04-25 17:55 ` Luis R. Rodriguez
2018-05-04 0:21 ` Luis R. Rodriguez
2018-05-04 0:21 ` Luis R. Rodriguez
2018-05-04 0:21 ` Luis R. Rodriguez
2018-05-04 15:26 ` Martijn Coenen
2018-05-04 15:26 ` Martijn Coenen
2018-05-04 15:26 ` Martijn Coenen
2018-05-04 19:44 ` Martijn Coenen
2018-05-04 19:44 ` Martijn Coenen
2018-05-04 19:44 ` Martijn Coenen
2018-05-08 15:38 ` Luis R. Rodriguez
2018-05-08 15:38 ` Luis R. Rodriguez
2018-05-08 15:38 ` Luis R. Rodriguez
2018-05-08 16:10 ` Luis R. Rodriguez
2018-05-08 16:10 ` Luis R. Rodriguez
2018-05-08 16:10 ` Luis R. Rodriguez
2018-06-07 16:49 ` Bjorn Andersson
2018-06-07 16:49 ` Bjorn Andersson
2018-06-07 16:49 ` Bjorn Andersson
2018-06-07 18:22 ` Luis R. Rodriguez
2018-06-07 18:22 ` Luis R. Rodriguez
2018-06-07 18:22 ` Luis R. Rodriguez
2018-06-01 19:23 ` Luis R. Rodriguez
2018-06-01 19:23 ` Luis R. Rodriguez
2018-06-01 19:23 ` Luis R. Rodriguez
2018-06-06 20:32 ` Do Qualcomm drivers use DMA buffers for request_firmware_into_buf()? Luis R. Rodriguez
2018-06-06 20:32 ` Luis R. Rodriguez
2018-06-06 20:32 ` Luis R. Rodriguez
2018-06-06 20:41 ` Ard Biesheuvel
2018-06-06 22:29 ` Luis R. Rodriguez
2018-06-06 22:41 ` Ard Biesheuvel
2018-06-06 22:55 ` Luis R. Rodriguez [this message]
2018-06-07 16:18 ` Bjorn Andersson
2018-06-07 16:18 ` Bjorn Andersson
2018-06-07 16:18 ` Bjorn Andersson
2018-06-07 16:18 ` Bjorn Andersson
2018-06-07 16:23 ` Ard Biesheuvel
2018-06-07 16:33 ` Greg Kroah-Hartman
2018-06-07 16:43 ` Ard Biesheuvel
2018-06-07 16:49 ` Greg Kroah-Hartman
2018-06-07 16:56 ` Ard Biesheuvel
2018-06-07 18:21 ` Bjorn Andersson
2018-06-07 18:42 ` Ard Biesheuvel
2018-06-26 0:08 ` Bjorn Andersson
2018-06-27 18:00 ` Luis R. Rodriguez
2018-06-27 22:21 ` Ard Biesheuvel
2018-06-27 23:33 ` Luis R. Rodriguez
2018-06-27 23:42 ` Ard Biesheuvel
2018-06-27 23:50 ` Luis R. Rodriguez
2018-06-08 6:41 ` Vlastimil Babka
2018-06-08 6:41 ` Vlastimil Babka
2018-06-08 6:41 ` Vlastimil Babka
2018-06-07 18:06 ` Bjorn Andersson
2018-06-18 23:49 ` Luis R. Rodriguez
2018-06-07 16:33 ` [PATCH v3 2/5] efi: Add embedded peripheral firmware support Bjorn Andersson
2018-06-07 16:33 ` Bjorn Andersson
2018-06-07 16:33 ` Bjorn Andersson
2018-04-08 17:40 ` [PATCH v3 3/5] platform/x86: Rename silead_dmi to touchscreen_dmi Hans de Goede
2018-04-09 8:07 ` Andy Shevchenko
2018-04-09 8:07 ` Andy Shevchenko
2018-04-20 0:20 ` Darren Hart
2018-04-20 0:20 ` Darren Hart
2018-04-08 17:40 ` [PATCH v3 4/5] platform/x86: touchscreen_dmi: Add EFI embedded firmware info support Hans de Goede
2018-04-08 17:40 ` [PATCH v3 5/5] platform/x86: touchscreen_dmi: Add info for the Chuwi Vi8 Plus tablet Hans de Goede
2018-04-09 8:10 ` Andy Shevchenko
2018-04-09 8:10 ` Andy Shevchenko
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