From: "Shevchenko, Andriy" <andriy.shevchenko@intel.com>
To: "Schmauss, Erik" <erik.schmauss@intel.com>
Cc: "Moore, Robert" <robert.moore@intel.com>,
Nikolaus Voss <nikolaus.voss@loewensteinmedical.de>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Ferry Toth <fntoth@gmail.com>, Len Brown <lenb@kernel.org>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Pavel Machek <pavel@ucw.cz>, Dan Murphy <dmurphy@ti.com>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"devel@acpica.org" <devel@acpica.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"nv@vosn.de" <nv@vosn.de>
Subject: Re: [PATCH] ACPICA: make acpi_load_table() return table index
Date: Thu, 26 Sep 2019 11:09:36 +0300 [thread overview]
Message-ID: <20190926080936.GB32742@smile.fi.intel.com> (raw)
In-Reply-To: <CF6A88132359CE47947DB4C6E1709ED53C646E97@ORSMSX122.amr.corp.intel.com>
On Wed, Sep 25, 2019 at 09:13:34PM +0300, Schmauss, Erik wrote:
> > -----Original Message-----
> > From: Ferry Toth <ftoth@telfort.nl>
> > Sent: Thursday, September 12, 2019 12:37 PM
> > To: Moore, Robert <robert.moore@intel.com>; Nikolaus Voss
> > <nikolaus.voss@loewensteinmedical.de>; Shevchenko, Andriy
> > <andriy.shevchenko@intel.com>; Schmauss, Erik <erik.schmauss@intel.com>;
> > Rafael J. Wysocki <rjw@rjwysocki.net>
> > Cc: Len Brown <lenb@kernel.org>; Jacek Anaszewski
> > <jacek.anaszewski@gmail.com>; Pavel Machek <pavel@ucw.cz>; Dan Murphy
> > <dmurphy@ti.com>; linux-acpi@vger.kernel.org; devel@acpica.org; linux-
> > kernel@vger.kernel.org; nv@vosn.de
> > Subject: Re: [PATCH] ACPICA: make acpi_load_table() return table index
> >
> > Op 12-09-19 om 16:19 schreef Moore, Robert:
> > > Nikolaus,
> > > The ability to unload an ACPI table (especially AML tables such as SSDTs) is in
> > the process of being deprecated in ACPICA -- since it is also deprecated in the
> > current ACPI specification. This is being done because of the difficulty of
> > deleting the namespace entries for the table. FYI, Windows does not properly
> > support this function either.
> >
> > I really hope this is not the case. On x86 loading/unloading SSDTs has proven to
> > be a powerful way to handle reconfigurable hardware without rebooting and
> > without requiring dedicated platform drivers. Same for user plugable hardware
> > on i2c/spi busses.
> >
> > This has worked before and will violate the "don't break user space" rule.
>
> If the table index wasn't being used, how did this work before?
> Which commit broke this?
>
> Bob and I are trying to understand if this is a regression or a new feature request...
It is a regression as I explained in my bisecting message.
Before it uses acpi_tb_* API directly.
I thought Bob already got the idea.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2019-09-26 8:09 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1559127603.git.nikolaus.voss@loewensteinmedical.de>
[not found] ` <8704391ae3004a6b4dd17975dbcc9e88bd28cf4b.1559127603.git.nikolaus.voss@loewensteinmedical.de>
[not found] ` <20190814185055.GZ30120@smile.fi.intel.com>
[not found] ` <CF6A88132359CE47947DB4C6E1709ED53C61A211@ORSMSX122.amr.corp.intel.com>
[not found] ` <alpine.DEB.2.20.1908161345590.41303@fox.voss.local>
[not found] ` <20190830145348.GM2680@smile.fi.intel.com>
[not found] ` <alpine.DEB.2.20.1909040913230.15999@fox.voss.local>
[not found] ` <20190906174605.GY2680@smile.fi.intel.com>
2019-09-12 8:05 ` [PATCH 1/3] ACPI: Resolve objects on host-directed table loads Nikolaus Voss
2019-09-12 8:07 ` [PATCH] ACPICA: make acpi_load_table() return table index Nikolaus Voss
2019-09-12 14:19 ` Moore, Robert
2019-09-12 19:36 ` Ferry Toth
2019-09-25 18:13 ` Schmauss, Erik
2019-09-26 8:09 ` Shevchenko, Andriy [this message]
2019-09-13 7:44 ` Nikolaus Voss
2019-09-13 14:20 ` Moore, Robert
2019-09-13 15:12 ` Shevchenko, Andriy
2019-09-13 16:48 ` Ferry Toth
2019-09-13 16:48 ` Ferry Toth
2019-09-13 17:40 ` Moore, Robert
2019-09-13 19:56 ` Rafael J. Wysocki
2019-09-16 9:46 ` Nikolaus Voss
2019-09-18 14:13 ` Moore, Robert
2019-09-18 14:31 ` Nikolaus Voss
2019-09-19 17:05 ` Moore, Robert
2019-09-23 9:05 ` Nikolaus Voss
2019-09-24 19:41 ` Moore, Robert
2019-09-25 10:18 ` Nikolaus Voss
2019-09-25 10:53 ` Shevchenko, Andriy
2019-09-19 8:13 ` Rafael J. Wysocki
2019-09-23 9:08 ` Nikolaus Voss
2019-09-23 9:47 ` [PATCH] ACPICA: Introduce acpi_load_table_with_index() Nikolaus Voss
2019-09-24 12:07 ` Shevchenko, Andriy
2019-09-24 12:08 ` Shevchenko, Andriy
2019-09-25 10:20 ` Nikolaus Voss
2019-09-24 15:11 ` Andy Shevchenko
2019-09-25 10:22 ` Nikolaus Voss
2019-09-26 16:09 ` [PATCH] ACPICA: make acpi_load_table() return table index Schmauss, Erik
2019-09-26 16:35 ` Shevchenko, Andriy
2019-09-26 16:51 ` Schmauss, Erik
2019-09-26 17:47 ` Shevchenko, Andriy
2019-09-26 18:44 ` Nikolaus Voss
2019-09-26 19:26 ` Rafael J. Wysocki
2019-09-26 19:41 ` Schmauss, Erik
2019-09-26 18:43 ` Nikolaus Voss
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