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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2017-02-06 03:05:16 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2017-02-09 04:54:33 +0100
commit90c1e3c2fafec57fcb55b5d69bcf293b1a5fc8b3 (patch)
treeea2bf611c6112a0fe03d1277ab62cbfc51cded92 /arch
parentpowerpc/mm: Fix spurrious segfaults on radix with autonuma (diff)
downloadlinux-90c1e3c2fafec57fcb55b5d69bcf293b1a5fc8b3.tar.xz
linux-90c1e3c2fafec57fcb55b5d69bcf293b1a5fc8b3.zip
powerpc/mm/radix: Update ERAT flushes when invalidating TLB
Three tiny changes to the ERAT flushing logic: First don't make it depend on DD1. It hasn't been decided yet but we might run DD2 in a mode that also requires explicit flushes for performance reasons so make it unconditional. We also add a missing isync, and finally remove the flush from _tlbiel_va as it is only necessary for congruence-class invalidations (PID, LPID and full TLB), not targetted invalidations. Fixes: 96ed1fe511a8 ("powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1") Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/mm/tlb-radix.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 61b79119065f..952713d6cf04 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -50,9 +50,7 @@ static inline void _tlbiel_pid(unsigned long pid, unsigned long ric)
for (set = 0; set < POWER9_TLB_SETS_RADIX ; set++) {
__tlbiel_pid(pid, set, ric);
}
- if (cpu_has_feature(CPU_FTR_POWER9_DD1))
- asm volatile(PPC_INVALIDATE_ERAT : : :"memory");
- return;
+ asm volatile(PPC_INVALIDATE_ERAT "; isync" : : :"memory");
}
static inline void _tlbie_pid(unsigned long pid, unsigned long ric)
@@ -85,8 +83,6 @@ static inline void _tlbiel_va(unsigned long va, unsigned long pid,
asm volatile(PPC_TLBIEL(%0, %4, %3, %2, %1)
: : "r"(rb), "i"(r), "i"(prs), "i"(ric), "r"(rs) : "memory");
asm volatile("ptesync": : :"memory");
- if (cpu_has_feature(CPU_FTR_POWER9_DD1))
- asm volatile(PPC_INVALIDATE_ERAT : : :"memory");
}
static inline void _tlbie_va(unsigned long va, unsigned long pid,