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Re: [Qemu-devel] [Qemu-ppc] [PATCH 4/5] ppc: Improve PCR bit selection i

From: Thomas Huth
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH 4/5] ppc: Improve PCR bit selection in ppc_set_compat()
Date: Wed, 8 Jun 2016 09:37:43 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.8.0

On 08.06.2016 09:24, David Gibson wrote:
> On Wed, Jun 08, 2016 at 08:59:30AM +0200, Thomas Huth wrote:
>> On 08.06.2016 07:44, David Gibson wrote:
>>> On Tue, Jun 07, 2016 at 05:39:39PM +0200, Thomas Huth wrote:
>>>> When using an olderr PowerISA level, all the upper compatibility
>>>> bits have to be enabled, too. For example when we want to run
>>>> something in PowerISA 2.05 compatibility mode on POWER8, the bit
>>>> for 2.06 has to be set beside the bit for 2.05.
>>>> Additionally, to make sure that we do not set bits that are not
>>>> supported by the host, we apply a mask with the known-to-be-good
>>>> bits here, too.
>>>> Signed-off-by: Thomas Huth <address@hidden>
>>> So, this breaks compile on 32-bit targets, because the spr values are
>>> only 32-bit there, and the PCR constants exceed that.  But
>>> ppc_set_compat() is only actually used on 64-bit machines, so I've
>>> added a change to #if it out for 64-bit targets.
>> D'oh, I explicitly compiled everything with a mingw32 cross-compiler to
>> catch such issues ... but apparently it compiled without -Werror here,
>> so I did not notice the warning :-(
> No, not 32-bit *host*, 32-bit *target*, so mingw32 wouldn't help.
> Configuring in ppc-softmmu and ppcemb-softmmu would.

Ok, right, ... I've now enabled these in my compile-test folder, too.

Anyway, seems like mingw is compiled without -Werror by default, unlike
the Linux builds ... I guess we could enable -Werror by default on mingw
nowadays, too...


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