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From: Avi Kivity <avi@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: vineshp@xilinx.com,
	Peter Crosthwaite <peter.crosthwaite@xilinx.com>,
	qemu-devel@nongnu.org, john.williams@xilinx.com,
	Gerd Hoffmann <kraxel@redhat.com>,
	edgar.iglesias@gmail.com
Subject: Re: [Qemu-devel] [PATCH v1 8/8] usb/ehci: Put RAM in undefined MMIO regions
Date: Thu, 25 Oct 2012 15:21:57 +0200	[thread overview]
Message-ID: <50893CF5.60608@redhat.com> (raw)
In-Reply-To: <CAFEAcA9pSJN5qJfJf-bF-Cf6dpzPm4i5OZfmModGW9vDTgbEHw@mail.gmail.com>

On 10/25/2012 03:12 PM, Peter Maydell wrote:
>  (2) what should the memory system do for accesses where there is
>  no memory region? This is really system specific as it depends
>  what the bus fabric does. For ARM the usual thing would be to
>  generate a decode error response which will result in the guest
>  CPU taking a data abort or prefetch abort. I don't think our
>  memory system currently has any way of saying "for this access
>  generate an exception"...
> 

You could easily have the top-level container have ->ops that generate
an exception.


>  (3) I don't think "qemu segfaults" is a good response to bad
>  guest behaviour so that needs fixing somehow even if we can't
>  model what the h/w does :-)

Right, a stack trace (or a patch) would be appreciated.

-- 
error compiling committee.c: too many arguments to function

  reply	other threads:[~2012-10-25 13:22 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-25  9:47 [Qemu-devel] [PATCH v1 0/8] Sysbus EHCI + Zynq USB Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 1/8] usb/ehci: parameterise the register region offsets Peter Crosthwaite
2012-10-25 12:04   ` Gerd Hoffmann
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 2/8] usb/ehci: Abstract away PCI DMA API Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 3/8] usb/ehci: seperate out PCIisms Peter Crosthwaite
2012-10-25 12:08   ` Gerd Hoffmann
2012-10-25 12:44     ` Peter Crosthwaite
2012-10-25 12:57       ` Gerd Hoffmann
2012-10-25 13:19         ` Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 4/8] usb/ehci: Add usb-ehci-sysbus Peter Crosthwaite
2012-10-25  9:55   ` Peter Maydell
2012-10-25 13:17     ` Avi Kivity
2012-10-25 12:10   ` Gerd Hoffmann
2012-10-25 12:39     ` Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 5/8] xilinx_zynq: add USB controllers Peter Crosthwaite
2012-10-25 12:12   ` Gerd Hoffmann
2012-10-25 12:16     ` Peter Maydell
2012-10-25 12:56       ` Peter Crosthwaite
2012-10-25 13:14         ` Gerd Hoffmann
2012-10-25 13:24           ` Peter Crosthwaite
2012-10-25 13:49             ` Gerd Hoffmann
2012-10-25 14:10               ` Gerd Hoffmann
2012-10-25 23:54                 ` Peter Crosthwaite
2012-10-25 23:59                   ` Peter Crosthwaite
2012-10-26  6:49                     ` Gerd Hoffmann
2012-10-26  6:59                       ` Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 6/8] usb/ehci: Guard definition of EHCI_DEBUG Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 7/8] usb/ehci: Debug mode compile fixes Peter Crosthwaite
2012-10-25  9:47 ` [Qemu-devel] [PATCH v1 8/8] usb/ehci: Put RAM in undefined MMIO regions Peter Crosthwaite
2012-10-25 12:19   ` Gerd Hoffmann
2012-10-25 13:03     ` Peter Crosthwaite
2012-10-25 13:12       ` Peter Maydell
2012-10-25 13:21         ` Avi Kivity [this message]
2012-10-25 13:28           ` Peter Maydell
2012-10-25 13:41             ` Avi Kivity
2012-10-25 13:50               ` Peter Maydell
2012-10-25 13:57                 ` Avi Kivity
2012-10-25 13:59                 ` Peter Crosthwaite
2012-10-25 14:08                   ` Peter Maydell
2012-10-25 13:20       ` Avi Kivity
2012-10-29 14:08 ` [Qemu-devel] [PATCH v1 0/8] Sysbus EHCI + Zynq USB Peter Crosthwaite
2012-10-30  7:20   ` Gerd Hoffmann
2012-10-30  8:24     ` Peter Crosthwaite
2012-10-30 10:30       ` Gerd Hoffmann
2012-10-30 12:14       ` Andreas Färber

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