From e7e81847478b37a3958a3163171bf6aee99f87d7 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Fri, 10 Aug 2018 16:42:48 +1000 Subject: powerpc/64s: move machine check SLB flushing to mm/slb.c The machine check code that flushes and restores bolted segments in real mode belongs in mm/slb.c. This will also be used by pseries machine check and idle code in future changes. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/mm/slb.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'arch/powerpc/mm/slb.c') diff --git a/arch/powerpc/mm/slb.c b/arch/powerpc/mm/slb.c index cb796724a6fc..0b095fa54049 100644 --- a/arch/powerpc/mm/slb.c +++ b/arch/powerpc/mm/slb.c @@ -90,6 +90,45 @@ static inline void create_shadowed_slbe(unsigned long ea, int ssize, : "memory" ); } +/* + * Insert bolted entries into SLB (which may not be empty, so don't clear + * slb_cache_ptr). + */ +void __slb_restore_bolted_realmode(void) +{ + struct slb_shadow *p = get_slb_shadow(); + enum slb_index index; + + /* No isync needed because realmode. */ + for (index = 0; index < SLB_NUM_BOLTED; index++) { + asm volatile("slbmte %0,%1" : + : "r" (be64_to_cpu(p->save_area[index].vsid)), + "r" (be64_to_cpu(p->save_area[index].esid))); + } +} + +/* + * Insert the bolted entries into an empty SLB. + * This is not the same as rebolt because the bolted segments are not + * changed, just loaded from the shadow area. + */ +void slb_restore_bolted_realmode(void) +{ + __slb_restore_bolted_realmode(); + get_paca()->slb_cache_ptr = 0; +} + +/* + * This flushes all SLB entries including 0, so it must be realmode. + */ +void slb_flush_all_realmode(void) +{ + /* + * This flushes all SLB entries including 0, so it must be realmode. + */ + asm volatile("slbmte %0,%0; slbia" : : "r" (0)); +} + static void __slb_flush_and_rebolt(void) { /* If you change this make sure you change SLB_NUM_BOLTED -- cgit v1.2.3