Re: [RFC v1] Add declarations for hierarchical memory region API

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From: Anthony Liguori <anthony@codemonkey.ws>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [RFC v1] Add declarations for hierarchical memory region API
Date: Sun, 22 May 2011 10:44:00 -0500	[thread overview]
Message-ID: <4DD92F40.8010405@codemonkey.ws> (raw)
In-Reply-To: <4DD8AF53.7020206@redhat.com>

On 05/22/2011 01:38 AM, Avi Kivity wrote:
> On 05/20/2011 05:31 PM, Anthony Liguori wrote:
>>> Several alpha system chips MCE when accessed with incorrect sizes.
>>> E.g. only 64-bit accesses are allowed.
>>
>>
>> But is this a characteristic of devices or is this a characteristic of
>> the chipset/CPU?
>
> The chipset is modelled by a MemoryRegion too.
>
>>
>> At any rate, I'm fairly sure it doesn't belong in the MemoryRegion
>> structure.
>>
>
> Since it isn't a global property, where does it belong?

The chipset should have an intercept in the dispatch path that enforces 
this (this assumes hierarchical dispatch).

Regards,

Anthony Liguori

>

WARNING: multiple messages have this Message-ID (diff)

From: Anthony Liguori <anthony@codemonkey.ws>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org,
	Richard Henderson <rth@twiddle.net>
Subject: Re: [Qemu-devel] [RFC v1] Add declarations for hierarchical memory region API
Date: Sun, 22 May 2011 10:44:00 -0500	[thread overview]
Message-ID: <4DD92F40.8010405@codemonkey.ws> (raw)
In-Reply-To: <4DD8AF53.7020206@redhat.com>

On 05/22/2011 01:38 AM, Avi Kivity wrote:
> On 05/20/2011 05:31 PM, Anthony Liguori wrote:
>>> Several alpha system chips MCE when accessed with incorrect sizes.
>>> E.g. only 64-bit accesses are allowed.
>>
>>
>> But is this a characteristic of devices or is this a characteristic of
>> the chipset/CPU?
>
> The chipset is modelled by a MemoryRegion too.
>
>>
>> At any rate, I'm fairly sure it doesn't belong in the MemoryRegion
>> structure.
>>
>
> Since it isn't a global property, where does it belong?

The chipset should have an intercept in the dispatch path that enforces 
this (this assumes hierarchical dispatch).

Regards,

Anthony Liguori

>

next prev parent reply	other threads:[~2011-05-22 15:44 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-19 14:12 [RFC v1] Memory API Avi Kivity
2011-05-19 14:12 ` [Qemu-devel] " Avi Kivity
2011-05-19 14:12 ` [RFC v1] Add declarations for hierarchical memory region API Avi Kivity
2011-05-19 14:12   ` [Qemu-devel] " Avi Kivity
2011-05-19 19:07   ` Alex Williamson
2011-05-20  9:18     ` Avi Kivity
2011-05-20  9:18       ` [Qemu-devel] " Avi Kivity
2011-05-19 19:27   ` Jan Kiszka
2011-05-19 19:27     ` [Qemu-devel] " Jan Kiszka
2011-05-20  9:20     ` Avi Kivity
2011-05-20  9:20       ` [Qemu-devel] " Avi Kivity
2011-05-19 20:43   ` Anthony Liguori
2011-05-20  9:23     ` Avi Kivity
2011-05-20 14:06       ` Richard Henderson
2011-05-20 14:06         ` Richard Henderson
2011-05-20 14:31         ` Anthony Liguori
2011-05-20 14:31           ` Anthony Liguori
2011-05-20 14:40           ` Richard Henderson
2011-05-20 14:40             ` Richard Henderson
2011-05-20 14:46             ` Anthony Liguori
2011-05-20 18:16               ` Blue Swirl
2011-05-20 18:16                 ` Blue Swirl
2011-05-22  6:40                 ` Avi Kivity
2011-05-22  6:40                   ` Avi Kivity
2011-05-22  6:39               ` Avi Kivity
2011-05-22  6:39                 ` [Qemu-devel] " Avi Kivity
2011-05-22 15:46                 ` Anthony Liguori
2011-05-22 15:52                   ` Avi Kivity
2011-05-22  6:38           ` Avi Kivity
2011-05-22  6:38             ` Avi Kivity
2011-05-22 15:44             ` Anthony Liguori [this message]
2011-05-22 15:44               ` Anthony Liguori
2011-05-22 15:56               ` Avi Kivity
2011-05-22 15:56                 ` [Qemu-devel] " Avi Kivity
2011-05-22  7:01         ` Avi Kivity
2011-05-22  7:01           ` [Qemu-devel] " Avi Kivity
2011-05-19 21:04   ` Stefan Weil
2011-05-20  9:26     ` Avi Kivity
2011-05-19 21:11   ` Stefan Hajnoczi
2011-05-19 21:11     ` [Qemu-devel] " Stefan Hajnoczi
2011-05-20  9:28     ` Avi Kivity
2011-05-20  9:28       ` [Qemu-devel] " Avi Kivity
2011-05-20 17:59   ` Blue Swirl
2011-05-22  6:45     ` Avi Kivity
2011-05-22  9:32       ` Blue Swirl
2011-05-22  9:32         ` [Qemu-devel] " Blue Swirl
2011-05-22 11:36         ` Avi Kivity
2011-05-22 12:06           ` Blue Swirl
2011-05-22 12:18             ` Avi Kivity
2011-05-22 15:32               ` Blue Swirl
2011-05-22 15:36                 ` Avi Kivity
2011-05-22  7:04     ` Avi Kivity
2011-05-22  7:04       ` [Qemu-devel] " Avi Kivity

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