From: Jonathan Cameron <jic23@kernel.org>
To: Atharva Tiwari <atharvatiwarilinuxdev@gmail.com>
Cc: "Bjorn Helgaas" <bhelgaas@google.com>,
"Thomas Gleixner" <tglx@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
"Len Brown" <lenb@kernel.org>,
"Linus Walleij" <linusw@kernel.org>,
"Bartosz Golaszewski" <brgl@kernel.org>,
"Sven Peter" <sven@kernel.org>, "Janne Grunau" <j@jannau.net>,
"Neal Gompa" <neal@gompa.dev>,
"Guenter Roeck" <linux@roeck-us.net>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>, "Lee Jones" <lee@kernel.org>,
"Pavel Machek" <pavel@kernel.org>,
"Griffin Kroah-Hartman" <griffin@kroah.com>,
"Hans de Goede" <hansg@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Sebastian Reichel" <sre@kernel.org>,
"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
"Wim Van Sebroeck" <wim@linux-watchdog.org>,
"Jarkko Sakkinen" <jarkko@kernel.org>,
"Mimi Zohar" <zohar@linux.ibm.com>,
"Roberto Sassu" <roberto.sassu@huawei.com>,
"Dmitry Kasatkin" <dmitry.kasatkin@gmail.com>,
"Eric Snowberg" <eric.snowberg@oracle.com>,
"Paul Moore" <paul@paul-moore.com>,
"James Morris" <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org,
asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
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linux-security-module@vger.kernel.org
Subject: Re: [RFC PATCH 14/14] mfd/macsmc: add ioctl to access smc keys
Date: Sun, 1 Nov 2026 01:38:17 +0000 [thread overview]
Message-ID: <20261101013817.22d67ea7@jic23-hlaptop> (raw)
In-Reply-To: <20261029085504.3547-15-atharvatiwarilinuxdev@gmail.com>
On Thu, 29 Oct 2026 04:52:11 -0400
Atharva Tiwari <atharvatiwarilinuxdev@gmail.com> wrote:
> Add a /dev/smc device so userspace can talk to the SMC
> directly. Some keys that need to be written aren't handled by
> any driver, or affect several drivers at once, so they
> can't be exposed cleanly through the kernel interfaces.
>
> Keys already managed by kernel drivers can't be written this
> way, to avoid conflicts.
If this isn't matching some legacy interface, then we need more
on what these do. Maybe they are suited to some other kernel
interface? In particular they might need the various controls
on how destructive they are that something like fwctl brings.
Generally an arbitrary opaque path to firmware isn't a good idea...
Jonathan
next prev parent reply other threads:[~2026-11-01 1:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 8:51 [RFC PATCH 00/14] Add macsmc support for Intel Macs, replacing applesmc Atharva Tiwari
2026-10-29 8:51 ` [RFC PATCH 01/14] treewide: Add backend for macsmc Atharva Tiwari
2026-10-29 8:51 ` [RFC PATCH 02/14] platform/x86: add backend for macsmc in intel macs Atharva Tiwari
2026-10-29 12:59 ` Ilpo Järvinen
2026-10-29 8:52 ` [RFC PATCH 03/14] watchdog: add driver for apple smc Atharva Tiwari
2026-10-29 13:30 ` Andy Shevchenko
2026-10-29 8:52 ` [RFC PATCH 04/14] iio/light: add new driver for macsmc Atharva Tiwari
2026-11-01 1:28 ` Jonathan Cameron
2026-10-29 8:52 ` [RFC PATCH 05/14] iio/accel: add driver for apple SMS Atharva Tiwari
2026-11-01 1:35 ` Jonathan Cameron
2026-10-29 8:52 ` [RFC PATCH 06/14] leds: add support for macsmc kbl Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 07/14] rtc: add support for x86 macs in macsmc-rtc Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 08/14] treewide: Add a flag to detect the Apple T2 chip Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 09/14] treewide: disable other rtc's in t2 macs Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 10/14] power/supply: add support for x86 macs in macsmc-power Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 11/14] acpi: disable battery and adapter for x86 apple machines Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 12/14] hwmon/macsmc: add more types Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 13/14] hwmon: add support for x86 macs in macsmc-hwmon Atharva Tiwari
2026-10-29 8:52 ` [RFC PATCH 14/14] mfd/macsmc: add ioctl to access smc keys Atharva Tiwari
2026-10-29 9:22 ` Sasha Finkelstein
2026-10-29 14:39 ` Atharva Tiwari
2026-10-29 14:53 ` Sasha Finkelstein
2026-10-29 15:25 ` Aditya Garg
2026-10-29 15:42 ` Sasha Finkelstein
2026-11-01 1:38 ` Jonathan Cameron [this message]
2026-11-01 1:07 ` [RFC PATCH 00/14] Add macsmc support for Intel Macs, replacing applesmc Jonathan Cameron
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