powerpc/64s/powernv: machine check dump SLB contents
Re-use the code introduced in pseries to save and dump the contents
of the SLB in the case of an SLB involved machine check exception.
This patch also avoids allocating the SLB save array on pseries radix.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190802105709.27696-9-npiggin@gmail.com
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index d8930c3..b955d54 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -142,17 +142,19 @@ static void __init fwnmi_init(void)
}
#ifdef CONFIG_PPC_BOOK3S_64
- /* Allocate per cpu slb area to save old slb contents during MCE */
- size = sizeof(struct slb_entry) * mmu_slb_size * nr_cpus;
- slb_ptr = memblock_alloc_try_nid_raw(size, sizeof(struct slb_entry),
- MEMBLOCK_LOW_LIMIT, ppc64_rma_size,
- NUMA_NO_NODE);
- if (!slb_ptr)
- panic("Failed to allocate %zu bytes below %pa for slb area\n",
- size, &ppc64_rma_size);
+ if (!radix_enabled()) {
+ /* Allocate per cpu area to save old slb contents during MCE */
+ size = sizeof(struct slb_entry) * mmu_slb_size * nr_cpus;
+ slb_ptr = memblock_alloc_try_nid_raw(size,
+ sizeof(struct slb_entry), MEMBLOCK_LOW_LIMIT,
+ ppc64_rma_size, NUMA_NO_NODE);
+ if (!slb_ptr)
+ panic("Failed to allocate %zu bytes below %pa for slb area\n",
+ size, &ppc64_rma_size);
- for_each_possible_cpu(i)
- paca_ptrs[i]->mce_faulty_slbs = slb_ptr + (mmu_slb_size * i);
+ for_each_possible_cpu(i)
+ paca_ptrs[i]->mce_faulty_slbs = slb_ptr + (mmu_slb_size * i);
+ }
#endif
}