From: Thiemo Seufer <ths@networkno.de>
To: "J. Mayer" <l_indien@magic.fr>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [RFC] support more than 2 execution modes
Date: Mon, 26 Mar 2007 09:49:40 +0100 [thread overview]
Message-ID: <20070326084940.GA23564@networkno.de> (raw)
In-Reply-To: <1174892411.6794.18.camel@rapid>
J. Mayer wrote:
> It appears that some targets may need more than the 2 "standard"
> execution modes.
> For example, PowerPC 64 has 3 execution modes: hypervisor, supervisor
> and problem state.
> Another example is alpha which has 4 execution modes (even if Linux
> seems to use only two of them).
>
> My proposal is to increase the number of the tlb_tables entries in a way
> that would be selected at compile time in order to keep good
> performances for other emulated targets that do not need this feature.
>
> You'll find attached a short patch implementing it. With this patch, one
> would just have to properly define CPU_MEM_INDEX and is_user flags for
> those targets.
>
> Please comment.
Looks good to me, as it will help to implement MIPS supervisor mode
some day. :-)
Thiemo
prev parent reply other threads:[~2007-03-26 8:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-26 7:00 [Qemu-devel] [RFC] support more than 2 execution modes J. Mayer
2007-03-26 8:49 ` Thiemo Seufer [this message]
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