From: Alexander Graf <agraf@suse.de>
Date: Fri, 5 Oct 2012 02:34:40 +0000 (+0200)
Subject: PPC: KVM: Fix BAT put
X-Git-Tag: TizenStudio_2.0_p2.3.2~208^2~3372^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ef8beb0e94c75984e016e855164361c36e15396c;p=sdk%2Femulator%2Fqemu.git

PPC: KVM: Fix BAT put

In the sregs API, upper and lower 32bit segments of the BAT registers
are swapped when doing a set. Since we need to support old kernels out
there, don't bother to fix it in the kernel, but instead work around
the problem in QEMU by swapping on put.

Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 1975323..93c5bb7 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -493,10 +493,11 @@ int kvm_arch_put_registers(CPUPPCState *env, int level)
 
         /* Sync BATs */
         for (i = 0; i < 8; i++) {
-            sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[1][i] << 32)
-                | env->DBAT[0][i];
-            sregs.u.s.ppc32.ibat[i] = ((uint64_t)env->IBAT[1][i] << 32)
-                | env->IBAT[0][i];
+            /* Beware. We have to swap upper and lower bits here */
+            sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[0][i] << 32)
+                | env->DBAT[1][i];
+            sregs.u.s.ppc32.ibat[i] = ((uint64_t)env->IBAT[0][i] << 32)
+                | env->IBAT[1][i];
         }
 
         ret = kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs);