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PPC: KVM: Fix BAT put

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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>
This commit is contained in:
Alexander Graf 2012-10-05 04:34:40 +02:00
parent fb37c3029c
commit ef8beb0e94
1 changed files with 5 additions and 4 deletions
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9
target-ppc/kvm.c
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@ -493,10 +493,11 @@ int kvm_arch_put_registers(CPUPPCState *env, int level)
/* Sync BATs */ /* Sync BATs */
for (i = 0; i < 8; i++) { for (i = 0; i < 8; i++) {
sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[1][i] << 32) /* Beware. We have to swap upper and lower bits here */
| env->DBAT[0][i]; sregs.u.s.ppc32.dbat[i] = ((uint64_t)env->DBAT[0][i] << 32)
sregs.u.s.ppc32.ibat[i] = ((uint64_t)env->IBAT[1][i] << 32) | env->DBAT[1][i];
| env->IBAT[0][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); ret = kvm_vcpu_ioctl(env, KVM_SET_SREGS, &sregs);