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From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Blue Swirl <blauwirbel@gmail.com>,
	qemu-devel <qemu-devel@nongnu.org>,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH] memory: simple memory tree printer
Date: Wed, 14 Sep 2011 22:24:26 +0300	[thread overview]
Message-ID: <4E70FF6A.8050401@redhat.com> (raw)
In-Reply-To: <4E70EDFF.4000008@siemens.com>

On 09/14/2011 09:10 PM, Jan Kiszka wrote:
> OK, let's try again: Do we have to model hierarchy in PIO address space
> at all? I don't think so.


We do.  A device listens to addresses 0x100-0x110.  Another BAR (at 
0x106) clips this to 0x100-0x106.  The pci/pci bridge clips this to 
0x105-0x106.  The host pci bridge remaps this as 
0x1000000105-0x1000000106 in the memory address space space.  But 
someone configured a cpu-local region at this address, so the cpu can't 
reach it at all.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

  reply	other threads:[~2011-09-14 19:24 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-11 20:31 [Qemu-devel] [PATCH] memory: simple memory tree printer Blue Swirl
2011-09-12  6:43 ` Richard Henderson
2011-09-12  9:01   ` Jan Kiszka
2011-09-12  9:11     ` Avi Kivity
2011-09-12  9:19       ` Jan Kiszka
2011-09-14 15:10         ` Richard Henderson
2011-09-14 15:23           ` Avi Kivity
2011-09-14 15:27             ` Richard Henderson
2011-09-14 15:29               ` Avi Kivity
2011-09-14 15:36                 ` Richard Henderson
2011-09-14 15:46                   ` Avi Kivity
2011-09-14 17:58           ` Jan Kiszka
2011-09-14 18:10             ` Jan Kiszka
2011-09-14 19:24               ` Avi Kivity [this message]
2011-09-15  9:30                 ` Jan Kiszka
2011-09-15  9:53                   ` Avi Kivity
2011-09-15 10:18                     ` Jan Kiszka
2011-09-15 11:21                       ` Avi Kivity
2011-09-14 18:26             ` Richard Henderson
2011-09-12  7:00 ` Peter Maydell
2011-09-12  8:46 ` Avi Kivity
2011-09-12  8:53   ` Jan Kiszka
2011-09-12  9:12     ` Avi Kivity
2011-09-12 10:37 ` Gerd Hoffmann
2011-09-12 10:53   ` Avi Kivity
2011-09-12 20:07     ` Blue Swirl

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