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From: Fabien Chouteau <chouteau@adacore.com>
Message-ID: <56659FA6.7050703@adacore.com>
Date: Mon, 7 Dec 2015 16:03:02 +0100
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Subject: Re: [Qemu-devel] [PATCH] sparc: allow CASA with ASI 0xa from user
	space
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To: =?UTF-8?Q?Z=c3=bcpke=2c_Alexander?= <azu@sysgo.com>, qemu-devel@nongnu.org

On 12/07/2015 02:07 PM, "Z=C3=BCpke, Alexander" wrote:
> Hi Fabien,
>=20
>> On December 7, 2015 at 1:56 PM Fabien Chouteau <chouteau@adacore.com> =
wrote:
>> On 12/07/2015 01:41 PM, "Z=C3=BCpke, Alexander" wrote:
>>>
>>> The check for the CASA feature on SPARC v8 is already in the existng =
code,
>>> just 3 lines above the second hunk in the patch:
>>>
>>
>> Yes but you add a special case that allow casa from user space, this
>> special case is only available on LEON3 so that should be taken into
>> account in the priv_insn check.
>>
>> Regards,
>>
>=20
> No, other v8 SPARCs do not have CASA at all, only LEON3 and 4 have CASA
> backported from v9. But when CASA is available on LEON, it's available
> in both user and supervisor mode. The only restriction for user mode
> is that one must use ASI 0xa.
>=20
>=20

You're right, and ASI 0xA is also user data in SPARKv9.

Patch looks good then :)

Thanks,