Nicholas Piggin b11931e9ad powerpc/64s: add pte_needs_flush and huge_pmd_needs_flush ... Allow PTE changes to avoid flushing the TLB when access permissions are being relaxed, the dirty bit is being set, and the accessed bit is being changed. Relaxing access permissions and setting dirty and accessed bits do not require a flush because the MMU will re-load the PTE and notice the updates (it may also cause a spurious fault). Clearing the accessed bit does not require a flush because of the imprecise PTE accessed bit accounting that is already performed, as documented in ptep_clear_flush_young(). This reduces TLB flushing for some mprotect(2) calls. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Link: https://lore.kernel.org/r/20220901110334.1618913-1-npiggin@gmail.com		2022-09-08 11:11:18 +10:00
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asm	powerpc/64s: add pte_needs_flush and huge_pmd_needs_flush	2022-09-08 11:11:18 +10:00
uapi/asm	powerpc/bpf: Fix use of user_pt_regs in uapi	2022-06-29 20:43:04 +10:00