diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-10-01 21:49:28 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-10-25 23:25:48 +0200 |
| commit | 4b4d4a21b988f6d56e0792058aa0b968e19fda6b (patch) | |
| tree | 5326f4f90ecc957895ac0c388333c5080190c95d | |
| parent | 5cc7a967e9de8c7b16c15aee4cb9f5bfcf0c5989 (diff) | |
target-ppc: Update slb array with correct index values.
Without this, a value of rb=0 and rs=0 results in replacing the 0th
index. This can be observed when using gdb remote debugging support.
(gdb) x/10i do_fork
0xc000000000085330 <do_fork>: Cannot access memory at address 0xc000000000085330
(gdb)
This is because when we do the slb sync via kvm_cpu_synchronize_state,
we overwrite the slb entry (0th entry) for 0xc000000000085330
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | target-ppc/kvm.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 0b5d391403..e2f8b0303f 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -1033,9 +1033,22 @@ int kvm_arch_get_registers(CPUState *cs) /* Sync SLB */ #ifdef TARGET_PPC64 + /* + * The packed SLB array we get from KVM_GET_SREGS only contains + * information about valid entries. So we flush our internal + * copy to get rid of stale ones, then put all valid SLB entries + * back in. + */ + memset(env->slb, 0, sizeof(env->slb)); for (i = 0; i < 64; i++) { - ppc_store_slb(env, sregs.u.s.ppc64.slb[i].slbe, - sregs.u.s.ppc64.slb[i].slbv); + target_ulong rb = sregs.u.s.ppc64.slb[i].slbe; + target_ulong rs = sregs.u.s.ppc64.slb[i].slbv; + /* + * Only restore valid entries + */ + if (rb & SLB_ESID_V) { + ppc_store_slb(env, rb, rs); + } } #endif |