From: "H. Peter Anvin" <hpa@zytor.com>
To: Thomas Renninger <trenn@suse.de>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, devel@acpica.org,
mingo@redhat.com, ck@conrad-kostecki.de, tglx@linutronix.de,
rjw@rjwysocki.net
Subject: Re: [PATCH 1/4] ACPI: Provide support for ACPI table adding via OS
Date: Tue, 18 Feb 2014 12:51:07 -0800 [thread overview]
Message-ID: <5303C7BB.4020803@zytor.com> (raw)
In-Reply-To: <1568883.1dLS7uNIC1@skinner>
On 02/18/2014 10:44 AM, Thomas Renninger wrote:
> On Tuesday, February 18, 2014 10:27:23 AM H. Peter Anvin wrote:
>> Why can't you add SSDTs? It would be particularly useful.
>
> There are 2 ways how ACPI tables get added:
> - Via pointer from a root table (XSDT or RSDT iirc)
> - Via load statement inside of ACPI context when ACPI BIOS
> code gets executed (iirc the physical address is passed).
>
> The latter is only for SSDTs.
> The problem is that you if you add an SSDT early, it might
> have been intended for overriding when an SSDT gets dynamically
> loaded later when the system is up which is particular useful as
> well if you want to debug this specific BIOS table.
>
> This could be workarounded via a boot param:
> acpi=allow_ssdt_adding
> But this is not nice. Maybe someone has a more elegant idea.
> Something could still be added if someone is really needing this.
Since adding SSDTs is one of the things I really can imagine one would
do, I think we need to figure out how to do that. I would think that
overriding would be the exception case.
-hpa
next prev parent reply other threads:[~2014-02-18 20:53 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-14 10:23 [PATCH] x86: HPET force enable for Soekris net6501 Conrad Kostecki
2014-02-14 17:46 ` H. Peter Anvin
2014-02-14 18:06 ` AW: " Conrad Kostecki
2014-02-14 18:08 ` H. Peter Anvin
2014-02-14 18:13 ` AW: " Conrad Kostecki
2014-02-14 18:16 ` H. Peter Anvin
2014-02-14 18:21 ` Thomas Gleixner
2014-02-14 18:22 ` H. Peter Anvin
2014-02-14 18:38 ` Thomas Gleixner
2014-02-14 18:39 ` H. Peter Anvin
2014-02-14 19:15 ` Thomas Gleixner
2014-02-14 19:26 ` H. Peter Anvin
2014-02-14 19:59 ` Thomas Gleixner
2014-02-14 20:06 ` H. Peter Anvin
2014-02-14 21:16 ` Thomas Gleixner
2014-02-14 21:18 ` H. Peter Anvin
2014-02-14 21:47 ` Thomas Gleixner
2014-02-14 21:48 ` H. Peter Anvin
2014-02-17 16:28 ` Thomas Renninger
2014-02-17 17:19 ` H. Peter Anvin
2014-02-17 18:23 ` Thomas Renninger
2014-02-17 18:23 ` [Devel] " Thomas Renninger
2014-02-17 18:47 ` AW: AW: " H. Peter Anvin
2014-02-17 19:25 ` Thomas Renninger
2014-02-17 19:25 ` [Devel] " Thomas Renninger
2014-02-17 19:40 ` AW: AW: " H. Peter Anvin
2014-02-18 18:22 ` ACPI: Also allow ACPI table adding via initrd not only overriding Thomas Renninger
2014-02-18 18:22 ` [Devel] " Thomas Renninger
2014-02-18 18:22 ` [PATCH 1/4] ACPI: Provide support for ACPI table adding via OS Thomas Renninger
2014-02-18 18:22 ` [Devel] " Thomas Renninger
2014-02-18 18:27 ` H. Peter Anvin
2014-02-18 18:44 ` Thomas Renninger
2014-02-18 18:44 ` [Devel] " Thomas Renninger
2014-02-18 20:51 ` H. Peter Anvin [this message]
2014-02-19 11:22 ` Thomas Renninger
2014-02-19 11:22 ` [Devel] " Thomas Renninger
2014-02-21 7:24 ` Zheng, Lv
2014-02-21 7:24 ` Zheng, Lv
2014-02-21 7:28 ` Zheng, Lv
2014-02-21 7:28 ` Zheng, Lv
2014-02-18 18:22 ` [PATCH 2/4] ACPICA: Introduce new acpi_os_physical_table_add OS callback Thomas Renninger
2014-02-18 18:22 ` [Devel] " Thomas Renninger
2014-02-18 18:22 ` [PATCH 3/4] ACPICA: Add BGRT signature to known signatures Thomas Renninger
2014-02-18 18:22 ` [Devel] " Thomas Renninger
2014-02-18 18:22 ` [PATCH 4/4] ACPI: Add new table signatures that can be overridden/added Thomas Renninger
2014-02-18 18:22 ` [Devel] " Thomas Renninger
2014-02-18 18:38 ` [Devel] ACPI: Also allow ACPI table adding via initrd not only overriding Moore, Robert
2014-02-18 18:38 ` Moore, Robert
2014-02-18 18:52 ` Thomas Renninger
2014-02-18 18:52 ` Thomas Renninger
2014-02-18 19:59 ` Moore, Robert
2014-02-18 19:59 ` Moore, Robert
2014-02-19 11:14 ` Thomas Renninger
2014-02-19 11:14 ` Thomas Renninger
2014-02-19 13:03 ` Thomas Gleixner
2014-02-14 18:28 ` AW: AW: AW: [PATCH] x86: HPET force enable for Soekris net6501 Conrad Kostecki
2014-09-09 13:56 ` Eric Sesterhenn
2014-09-09 14:54 ` Thomas Gleixner
2014-09-09 15:26 ` H. Peter Anvin
2014-09-09 15:41 ` Thomas Gleixner
2014-09-12 9:41 ` Eric Sesterhenn
2014-09-12 10:37 ` Thomas Gleixner
2014-09-12 11:06 ` [PATCH] x86: HPET force enable for e6xx based systems Eric Sesterhenn
2014-09-16 0:58 ` [tip:x86/platform] " tip-bot for Peter Neubauer
[not found] <1393608241-31037-1-git-send-email-trenn@suse.de>
2014-02-28 17:23 ` [PATCH 1/4] ACPI: Provide support for ACPI table adding via OS Thomas Renninger
2014-02-28 17:27 ` Thomas Renninger
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