[PATCH 4.19 097/220] powerpc/64s/radix: Explicitly flush ERAT with local LPID invalidation

Greg Kroah-Hartman
2019-11-22T11:00:13Z

From: Nicholas Piggin <npiggin@gmail.com>

[ Upstream commit 053c5a753e951c5dd1729af2cf4d8107f2e6e09b ]

Local radix TLB flush operations that operate on congruence classes
have explicit ERAT flushes for POWER9. The process scoped LPID flush
did not have a flush, so add it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/mm/tlb-radix.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 62be0e5732b70..796ff5de26d09 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -429,6 +429,7 @@ static inline void _tlbiel_lpid_guest(unsigned long lpid, unsigned long ric)
__tlbiel_lpid_guest(lpid, set, RIC_FLUSH_TLB);

asm volatile("ptesync": : :"memory");
+ asm volatile(PPC_INVALIDATE_ERAT : : :"memory");
}

--
2.20.1