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Re: [Qemu-devel] Single 64bit memory transaction instead of two 32bit me
Re: [Qemu-devel] Single 64bit memory transaction instead of two 32bit memory transaction
Sat, 03 Sep 2011 17:36:42 -0500
Is there a patch for the new MemoryRegion API?
At least for now, I need to be able to issue a single 64, 128 or 256bit transaction to a particular IO device. Is there a way I can do this now as a temp solution? I don't mind coalescing the bytes as they are issued by Qemu but I have no way to know that they're from the same instruction. Any pointers?
From: Richard Henderson [mailto:address@hidden
Cc: address@hidden, address@hidden
Sent: Fri, 02 Sep 2011 20:53:30 -0500
Subject: Re: [Qemu-devel] Single 64bit memory transaction instead of two 32bit memory transaction
On 09/02/2011 12:46 AM, Adnan Khaleel wrote:
> Is there anyway we can prevent Qemu breaking up 64,128 and 256bit XMM or YMM instructions into smaller chunks and have them issue as a single transaction of the original width?
Not yet. The new MemoryRegion API will allow this, but we need to convert all
the devices first, then rip out the old API.
It's a work in progress...