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| author | Michael Neuling <mikey@neuling.org> | 2015-05-27 08:06:55 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-03 05:27:15 +0200 |
| commit | 85a97da9584868b6cd0c54b93c5f65319f615b08 (patch) | |
| tree | d1dadeb3d730d2eae9957ff7efb2d1771dba7cc9 | |
| parent | cxl: Use call_rcu to reduce latency when releasing the afu fd (diff) | |
| download | linux-85a97da9584868b6cd0c54b93c5f65319f615b08.tar.xz linux-85a97da9584868b6cd0c54b93c5f65319f615b08.zip | |
powerpc/copro: Fix faulting kernel segments
This fixes calculating the key bits (KP and KS) in the SLB VSID for kernel
mappings.
I'm not CCing this to stable as there are no uses of this currently.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/mm/copro_fault.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/powerpc/mm/copro_fault.c b/arch/powerpc/mm/copro_fault.c index f031a47d7701..7a71d7f81cf6 100644 --- a/arch/powerpc/mm/copro_fault.c +++ b/arch/powerpc/mm/copro_fault.c @@ -100,7 +100,7 @@ EXPORT_SYMBOL_GPL(copro_handle_mm_fault); int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) { - u64 vsid; + u64 vsid, vsidkey; int psize, ssize; switch (REGION_ID(ea)) { @@ -109,6 +109,7 @@ int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) psize = get_slice_psize(mm, ea); ssize = user_segment_size(ea); vsid = get_vsid(mm->context.id, ea, ssize); + vsidkey = SLB_VSID_USER; break; case VMALLOC_REGION_ID: pr_devel("%s: 0x%llx -- VMALLOC_REGION_ID\n", __func__, ea); @@ -118,19 +119,21 @@ int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb) psize = mmu_io_psize; ssize = mmu_kernel_ssize; vsid = get_kernel_vsid(ea, mmu_kernel_ssize); + vsidkey = SLB_VSID_KERNEL; break; case KERNEL_REGION_ID: pr_devel("%s: 0x%llx -- KERNEL_REGION_ID\n", __func__, ea); psize = mmu_linear_psize; ssize = mmu_kernel_ssize; vsid = get_kernel_vsid(ea, mmu_kernel_ssize); + vsidkey = SLB_VSID_KERNEL; break; default: pr_debug("%s: invalid region access at %016llx\n", __func__, ea); return 1; } - vsid = (vsid << slb_vsid_shift(ssize)) | SLB_VSID_USER; + vsid = (vsid << slb_vsid_shift(ssize)) | vsidkey; vsid |= mmu_psize_defs[psize].sllp | ((ssize == MMU_SEGSIZE_1T) ? SLB_VSID_B_1T : 0); |