powerpc: Only do ERAT invalidate on radix context switch on P9 DD1

[karo-tx-linux.git] / arch / powerpc / mm / mmu_context_book3s64.c

diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c
index c6dca2ae78ef9f1225dd6a13e0997034132315a4..3ef0a89503bfb3b19dd9f31677541632e7e659d6 100644 (file)
--- a/arch/powerpc/mm/mmu_context_book3s64.c
+++ b/arch/powerpc/mm/mmu_context_book3s64.c
@@ -235,10 +235,15 @@ void destroy_context(struct mm_struct *mm)
 #ifdef CONFIG_PPC_RADIX_MMU
 void radix__switch_mmu_context(struct mm_struct *prev, struct mm_struct *next)
 {
-       asm volatile("isync": : :"memory");
-       mtspr(SPRN_PID, next->context.id);
-       asm volatile("isync \n"
-                    PPC_SLBIA(0x7)
-                    : : :"memory");
+
+       if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
+               isync();
+               mtspr(SPRN_PID, next->context.id);
+               isync();
+               asm volatile(PPC_INVALIDATE_ERAT : : :"memory");
+       } else {
+               mtspr(SPRN_PID, next->context.id);
+               isync();
+       }
 }
 #endif