xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/64s/powernv: machine check dump SLB contents

Browse Source 
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
This commit is contained in:
Nicholas Piggin
2019-08-02 20:56:33 +10:00
committed by Michael Ellerman
parent 0b66370c61
commit 7290f3b3d3
4 changed files with 31 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
arch/powerpc/platforms/pseries/setup.c
View File

@@ -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
}