From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Thomas Renninger <trenn@suse.de>
Cc: Len Brown <lenb@kernel.org>, Zhao Yakui <yakui.zhao@intel.com>,
"Linux-acpi@vger.kernel.org" <Linux-acpi@vger.kernel.org>,
me@markdoughty.co.uk, ibm-acpi-devel@lists.sourceforge.net
Subject: Re: [PATCH] : ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt"
Date: Fri, 9 Jan 2009 12:34:16 +0000 [thread overview]
Message-ID: <20090109123416.GA31003@srcf.ucam.org> (raw)
In-Reply-To: <200901091316.16334.trenn@suse.de>
On Fri, Jan 09, 2009 at 01:16:15PM +0100, Thomas Renninger wrote:
> IMO this cannot generally be done, because chances are high that machines
> which do not support Windows likely will break.
> Chances are high that a machine which does not support Windows uses 64 bit
> addresses and leaves the 32 bit ones uninitialized, a spec valid configuration
> which will then break.
Bear in mind that the values in the 32-bit entries are *io port*
addresses, not physical memory addresses. There's only 16 bits of io
ports, so the probability of the 64-bit values being programmed
correctly and the 32-bit ones containing a valid but not-working set is
tiny. If you know of any machines that behave this way, I'd be
impressed - and it'll be far easier to dmi whitelist them than the other
way around.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-01-09 12:34 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-31 18:42 [PATCH] ACPI: EC: clean up tmp variable before reuse Alexey Starikovskiy
2008-11-03 8:02 ` Zhao Yakui
2008-11-03 8:24 ` [PATCH]: ACPI: Initialize EC global lock based on the return value of _GLK Zhao Yakui
2008-11-04 7:41 ` [PATCH]: ACPI Cleanup :Initialize EC global lock based on the return status Zhao Yakui
2008-11-04 8:05 ` Alexey Starikovskiy
2008-11-04 8:58 ` Rafael J. Wysocki
2008-11-04 9:21 ` Alexey Starikovskiy
2008-11-04 9:37 ` Zhao Yakui
2008-11-04 9:38 ` Alexey Starikovskiy
2008-11-05 1:05 ` Zhao Yakui
2008-11-05 7:24 ` Alexey Starikovskiy
2008-12-17 8:55 ` [PATCH] : ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt" Zhao Yakui
2009-01-09 6:35 ` Len Brown
2009-01-09 10:54 ` Thomas Renninger
2009-01-09 10:59 ` Len Brown
2009-01-09 12:16 ` Thomas Renninger
2009-01-09 12:34 ` Matthew Garrett [this message]
2009-01-12 14:13 ` Thomas Renninger
2009-01-12 14:16 ` Matthew Garrett
2009-01-12 22:17 ` Thomas Renninger
2009-01-12 23:38 ` Matthew Garrett
2009-01-09 10:58 ` Blacklist known broken machines to use the rsdt and enabled Cstates on R40e Thomas Renninger
2009-01-09 10:58 ` [PATCH 1/2] Blacklist known broken machines (ThinkPad R40e and R50e) to use rsdt instead xsdt Thomas Renninger
2009-01-09 10:58 ` [PATCH 2/2] R40e using rsdt (previous patch) makes all Cstates work -> remove blacklisting Thomas Renninger
2008-12-30 4:01 ` [PATCH] : ACPI : Add the MWAIT C-state mask to avoid overflow Zhao Yakui
2009-01-04 4:04 ` Zhao Yakui
2009-01-09 6:28 ` Len Brown
2009-01-12 7:07 ` [PATCH] : ACPI : Use clocksource to get the C-state time instead of ACPI PM timer Zhao Yakui
2009-01-12 7:58 ` Rafael J. Wysocki
2009-01-12 9:31 ` Zhao Yakui
2009-01-12 12:27 ` Rafael J. Wysocki
2009-01-12 9:39 ` Zhao Yakui
2009-01-12 22:09 ` Pallipadi, Venkatesh
2009-01-13 1:26 ` Zhao Yakui
2009-01-13 1:42 ` Zhao Yakui
2009-01-13 3:50 ` [RESEND] " Zhao Yakui
2009-01-20 2:52 ` Len Brown
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