[PATCH AUTOSEL 4.19 085/209] powerpc/64s/radix: Explicitly flush ERAT with local LPID invalidation

[Sasha Levin]

From: Nicholas Piggin <npiggin at 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 at gmail.com>
Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
Signed-off-by: Sasha Levin <sashal at 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 0cddae4263f96..21441ff17b92b 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -366,6 +366,7 @@ 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