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powerpc/spufs: Fix hash faults for kernel regions
Commitac29c64089
("powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED") swapped _PAGE_USER for _PAGE_PRIVILEGED, and introduced check_pte_access() which denied kernel access to non-_PAGE_PRIVILEGED pages. However, it didn't add _PAGE_PRIVILEGED to the hash fault handler for spufs' kernel accesses, so the DMAs required to establish SPE memory no longer work. This change adds _PAGE_PRIVILEGED to the hash fault handler for kernel accesses. Fixes:ac29c64089
("powerpc/mm: Replace _PAGE_USER with _PAGE_PRIVILEGED") Cc: stable@vger.kernel.org # v4.7+ Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Reported-by: Sombat Tragolgosol <sombat3960@gmail.com> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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1 changed files with 3 additions and 1 deletions
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@ -197,7 +197,9 @@ static int __spu_trap_data_map(struct spu *spu, unsigned long ea, u64 dsisr)
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(REGION_ID(ea) != USER_REGION_ID)) {
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spin_unlock(&spu->register_lock);
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ret = hash_page(ea, _PAGE_PRESENT | _PAGE_READ, 0x300, dsisr);
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ret = hash_page(ea,
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_PAGE_PRESENT | _PAGE_READ | _PAGE_PRIVILEGED,
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0x300, dsisr);
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spin_lock(&spu->register_lock);
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if (!ret) {
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