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KVM: PPC: Book3S HV: radix use correct tlbie sequence in kvmppc_radix_tlbie_page

PATCH New Nicholas Piggin 1 participant 1 message Apr 10, 2018

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PowerPC KVM PowerPC
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Nicholas Piggin

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PATCH 1/1 KVM: PPC: Book3S HV: radix use correct tlbie sequence in kvmppc_radix_tlbie_page

The standard eieio ; tlbsync ; ptesync must follow tlbie to ensure it is ordered with respect to subsequent operations.

Signed-off-by Nicholas Piggin <[email protected]>
---
 arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
arch/powerpc/kvm/book3s_64_mmu_radix.c +1 -1
index 5d9bafe9a371..81d5ad26f9a1 100644
@@ -160,7 +160,7 @@ static void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr,
 	if (cpu_has_feature(CPU_FTR_P9_TLBIE_BUG))
 		asm volatile(PPC_TLBIE_5(%0, %1, 0, 0, 1)
 			     : : "r" (addr), "r" (kvm->arch.lpid) : "memory");
-	asm volatile("ptesync": : :"memory");
+	asm volatile("eieio ; tlbsync ; ptesync": : :"memory");
 }
 
 unsigned long kvmppc_radix_update_pte(struct kvm *kvm, pte_t *ptep,
Signature · 1 line
2.17.0