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

From: David Gibson
Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH 4/5] ppc: Improve PCR bit selection in ppc_set_compat()
Date: Wed, 8 Jun 2016 17:24:59 +1000
User-agent: Mutt/1.6.1 (2016-04-27)

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.

David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!

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