From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: qemu-devel@nongnu.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>,
Christian Borntraeger <borntraeger@de.ibm.com>
Subject: Re: [Qemu-devel] TCG problem with cpu_{st,ld}x_data ?
Date: Sun, 24 Jul 2016 22:51:37 +1000 [thread overview]
Message-ID: <1469364697.8568.253.camel@kernel.crashing.org> (raw)
In-Reply-To: <1469364141.8568.251.camel@kernel.crashing.org>
On Sun, 2016-07-24 at 22:42 +1000, Benjamin Herrenschmidt wrote:
>
> What *did* work was to copy what x86 does, which is to change my
> helper_stvebx() to not use cpu_stb_data at all, but instead use
> cpu_stb_data_ra(...., GETPC()), which mimmics what x86 does for some
> of
> it's helpers.
>
> That fixed the specific problem I was chasing.
>
> However, there are a ton of other helpers, in powerpc, s390 and other
> archs, doing that cpu_stb_data() the same way we do, so I really
> wonder
> what's going on here.
>
> Some advice would be very much appreciated ;-)
FYI: This probably completely wrong patch (but it was easier than
hacking all the helpers) fixed the problem for me. With this (and the
video driver I wrote that I will publish asap), I can now reliably boot
various versions of MacOS X in qemu ppc using a 7400 CPU.
Cheers,
Ben.
next prev parent reply other threads:[~2016-07-24 12:51 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-24 12:42 [Qemu-devel] TCG problem with cpu_{st,ld}x_data ? Benjamin Herrenschmidt
2016-07-24 12:51 ` Benjamin Herrenschmidt [this message]
2016-07-24 12:52 ` Benjamin Herrenschmidt
2016-07-25 0:36 ` Richard Henderson
2016-07-25 0:46 ` Benjamin Herrenschmidt
2016-07-25 0:51 ` Benjamin Herrenschmidt
2016-07-25 14:00 ` Richard Henderson
2016-07-25 21:42 ` Benjamin Herrenschmidt
2016-07-25 22:19 ` Peter Maydell
2016-07-25 22:42 ` Benjamin Herrenschmidt
2016-07-25 23:22 ` Benjamin Herrenschmidt
2016-07-25 0:34 ` Richard Henderson
2016-07-25 5:15 ` Benjamin Herrenschmidt
2016-07-25 14:12 ` Richard Henderson
2016-07-25 21:46 ` Benjamin Herrenschmidt
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