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Re: [Qemu-devel] [Qemu-ppc] [PATCH] target-ppc: fix sync of SPR_SDR1 wit
From: |
David Gibson |
Subject: |
Re: [Qemu-devel] [Qemu-ppc] [PATCH] target-ppc: fix sync of SPR_SDR1 with KVM |
Date: |
Thu, 3 Mar 2016 15:35:07 +1100 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
On Wed, Mar 02, 2016 at 11:06:19AM +1100, David Gibson wrote:
> On Tue, Mar 01, 2016 at 07:03:10PM +0100, Greg Kurz wrote:
> > The gdbstub can't access guest memory with current master. This is what you
> > get in gdb:
> >
> > 0x00000000100009b8 in main (argc=<error reading variable: Cannot access
> > memory
> > at address 0x3fffce4d3620>, argv=<error reading variable: Cannot access
> > memory
> > at address 0x3fffce4d3628>) at fp.c:11
> >
> > Bisect leads to the following commit:
> >
> > commit fa48b4328c39b2532e47efcfcba6d4031512f514
> > Author: David Gibson <address@hidden>
> > Date: Tue Feb 9 09:30:21 2016 +1000
> >
> > target-ppc: Remove hack for ppc_hash64_load_hpte*() with HV KVM
> >
> > Looking at the env->external_htab users, I've spotted a behaviour change in
> > kvm_arch_get_registers(), which now always calls ppc_store_sdr1().
> >
> > Checking kvmppc_kern_htab, like it is done in the MMU helpers, fixes the
> > issue.
> >
> > Signed-off-by: Greg Kurz <address@hidden>
>
> Mea culpa. Good catch, applied to ppc-for-2.6, thanks.
Ah.. wait.. this patch breaks compile for the ppc32 target. Can you
fix this please.
> > ---
> > target-ppc/kvm.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
> > index d67c169ba324..dbc37f25af2b 100644
> > --- a/target-ppc/kvm.c
> > +++ b/target-ppc/kvm.c
> > @@ -1190,7 +1190,7 @@ int kvm_arch_get_registers(CPUState *cs)
> > return ret;
> > }
> >
> > - if (!env->external_htab) {
> > + if (!kvmppc_kern_htab && !env->external_htab) {
> > ppc_store_sdr1(env, sregs.u.s.sdr1);
> > }
> >
> >
>
--
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_!
http://www.ozlabs.org/~dgibson
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