From: "H. Peter Anvin" <hpa@zytor.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: guenter.roeck@ericsson.com, linux-kernel@vger.kernel.org,
Yinghai <yinghai.lu@oracle.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Bjorn Helgaas <bjorn.helgaas@hp.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
Andy Isaacson <adi@hexapodia.org>,
Thomas Renninger <trenn@suse.de>
Subject: Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32
Date: Fri, 09 Apr 2010 15:55:42 -0700 [thread overview]
Message-ID: <4BBFB06E.6020703@zytor.com> (raw)
In-Reply-To: <20100409235413.1167ff0c@lxorguk.ukuu.org.uk>
On 04/09/2010 03:54 PM, Alan Cox wrote:
> Depending on your definition of "PC". Quite a few early MSDOS systems had
> video elsewhere. Some embedded systems without video use the space for
> other stuff. Lots of ISA 386/486 PCs had cards borrowing the unused bits
> of video space.
With "early MSDOS" I presume you mean pre-386 (early on there were
computer makers who thought the MS-DOS universe would work like the CP/M
universe had), so that doesn't really matter for these purposes.
>> I'm wondering what those legitimate reasons are. This is particularly
>> so since it affects our ability to deal with very early errors, long
>> before we have enumerated anything. At this point we can at least lay
>> down bytes in the video area and hope the user can see them.
>
> Thats why you have the bios equipment byte and video queries.
Yes of course; just because we don't want people to do the wrong thing
doesn't necessarily mean we won't try to be nice about it, as long as it
doesn't cause excessive pains elsewhere.
-hpa
next prev parent reply other threads:[~2010-04-09 22:56 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-07 21:06 [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 Bjorn Helgaas
2010-04-07 22:45 ` Yinghai
2010-04-07 23:05 ` Bjorn Helgaas
2010-04-07 23:22 ` Yinghai
2010-04-08 3:24 ` Bjorn Helgaas
2010-04-08 4:42 ` H. Peter Anvin
2010-04-08 13:04 ` Bjorn Helgaas
2010-04-09 16:04 ` Bjorn Helgaas
2010-04-09 16:44 ` H. Peter Anvin
2010-04-09 17:22 ` Yinghai
2010-04-09 18:23 ` H. Peter Anvin
2010-04-09 18:55 ` Guenter Roeck
2010-04-09 19:55 ` Yinghai
2010-04-09 22:21 ` Andy Isaacson
2010-04-09 22:27 ` Yinghai Lu
2010-04-09 22:35 ` Andy Isaacson
2010-04-09 22:44 ` H. Peter Anvin
2010-04-09 22:54 ` Yinghai
2010-04-09 23:01 ` Yinghai
2010-04-10 0:00 ` Andy Isaacson
2010-04-10 1:10 ` Yinghai
2010-04-10 1:43 ` Andy Isaacson
2010-04-10 1:48 ` Yinghai
2010-04-10 1:57 ` Andy Isaacson
2010-04-10 2:46 ` Yinghai
2010-04-12 18:54 ` Andy Isaacson
2010-04-12 19:34 ` Yinghai
2010-04-12 19:48 ` Andy Isaacson
2010-04-12 19:55 ` yinghai.lu
2010-04-12 20:02 ` Andy Isaacson
2010-04-12 22:32 ` [PATCH -v2 1/2] x86: Reserve [0xa0000, 0x100000] in e820 map Yinghai
2010-04-13 21:02 ` Bjorn Helgaas
2010-04-13 21:08 ` Yinghai
2010-04-13 21:09 ` H. Peter Anvin
2010-04-13 21:11 ` Yinghai
2010-04-13 21:18 ` H. Peter Anvin
2010-04-13 21:22 ` [PATCH -v3 1/3] " Yinghai
2010-04-23 23:30 ` H. Peter Anvin
2010-04-26 15:35 ` Jesse Barnes
2010-04-13 21:23 ` [PATCH -v3 2/3] x86,pci, acpi: host bridge windows inherit BUSY flag from parent Yinghai
2010-04-13 21:24 ` [PATCH -v3 3/3] pci: don't allocate from a BUSY bus resource Yinghai
2010-04-13 21:42 ` [PATCH -v2 1/2] x86: Reserve [0xa0000, 0x100000] in e820 map Yinghai
2010-04-13 21:58 ` H. Peter Anvin
2010-04-13 22:29 ` Yinghai
2010-04-13 22:39 ` Yinghai
2010-04-13 22:41 ` H. Peter Anvin
2010-04-13 22:58 ` Yinghai
2010-04-13 23:02 ` H. Peter Anvin
2010-04-13 23:03 ` Yinghai
2010-04-13 23:07 ` H. Peter Anvin
2010-04-13 23:09 ` Yinghai
2010-04-21 5:33 ` [PATCH -v4 1/3] " Yinghai
2010-04-21 5:34 ` [PATCH 2/3] x86, resource: Add reserve_region_with_split_check_child() Yinghai
2010-04-21 5:35 ` [PATCH 3/3] x86,pci,acpi: Handle invalid _CRS Yinghai
2010-04-21 15:21 ` Bjorn Helgaas
2010-04-21 16:45 ` Yinghai Lu
2010-04-21 16:59 ` Bjorn Helgaas
2010-04-21 22:33 ` H. Peter Anvin
2010-04-21 23:04 ` Bjorn Helgaas
2010-04-21 23:10 ` H. Peter Anvin
2010-04-21 23:43 ` Yinghai
2010-04-22 0:02 ` H. Peter Anvin
2010-04-22 0:06 ` Yinghai
2010-04-21 19:31 ` [PATCH -v4 1/3] x86: Reserve [0xa0000, 0x100000] in e820 map Andy Isaacson
2010-04-23 23:05 ` [PATCH] x86/PCI: never allocate PCI MMIO resources below BIOS_END Bjorn Helgaas
2010-04-23 23:44 ` H. Peter Anvin
2010-04-24 0:36 ` Yinghai Lu
2010-04-26 12:50 ` R. Andrew Bailey
2010-04-26 15:40 ` Bjorn Helgaas
2010-04-26 18:34 ` Andy Isaacson
2010-04-26 19:31 ` Jesse Barnes
2010-04-26 20:27 ` Bjorn Helgaas
2010-04-26 20:37 ` Jesse Barnes
2010-04-26 21:07 ` Yinghai
2010-04-26 21:19 ` H. Peter Anvin
2010-04-26 21:12 ` H. Peter Anvin
2010-04-26 21:25 ` Jesse Barnes
2010-04-26 21:44 ` H. Peter Anvin
2010-04-26 21:53 ` Jesse Barnes
2010-04-26 21:59 ` Yinghai Lu
2010-04-26 22:04 ` [PATCH -v5] reserve a0000 - 0x10000 Yinghai
[not found] ` <4BD60CD4.9020708@oracle.com>
2010-04-26 22:04 ` [PATCH -v5 1/3] x86: Reserve [0xa0000, 0x100000] in e820 map Yinghai
2010-04-26 22:04 ` [PATCH -v5 2/3] x86: Remove probe_roms for 32bit Yinghai
2010-04-26 22:04 ` [PATCH -v5 3/3] x86, resource: Add reserve_region_with_split_check_child() Yinghai
2010-04-26 21:44 ` [PATCH] x86/PCI: never allocate PCI MMIO resources below BIOS_END jacob pan
2010-04-13 23:03 ` [PATCH -v2 1/2] x86: Reserve [0xa0000, 0x100000] in e820 map H. Peter Anvin
2010-04-14 0:57 ` Yinghai
2010-04-14 16:55 ` Bjorn Helgaas
2010-04-14 17:21 ` Yinghai Lu
2010-04-14 19:25 ` Andy Isaacson
2010-04-14 19:27 ` Yinghai
2010-04-14 19:43 ` Andy Isaacson
2010-04-14 19:49 ` Yinghai
2010-04-12 22:33 ` [PATCH -v2 2/2] x86,pci, acpi: Inherent BUSY flag when setup_resource for root bus Yinghai
2010-04-12 22:44 ` Jesse Barnes
2010-04-13 21:02 ` Bjorn Helgaas
2010-04-09 20:11 ` [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 H. Peter Anvin
2010-04-09 20:31 ` Guenter Roeck
2010-04-09 20:44 ` H. Peter Anvin
2010-04-09 21:01 ` Guenter Roeck
2010-04-09 22:42 ` Alan Cox
2010-04-09 22:42 ` H. Peter Anvin
2010-04-09 22:54 ` Alan Cox
2010-04-09 22:55 ` H. Peter Anvin [this message]
2010-04-09 22:51 ` Alan Cox
2010-04-09 22:55 ` H. Peter Anvin
2010-04-07 23:43 ` H. Peter Anvin
2010-04-08 0:19 ` Andy Isaacson
2010-04-08 5:00 ` H. Peter Anvin
2010-04-08 21:40 ` Andy Isaacson
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