From 62e984ddfd6b056d399e24113f5e6a7145e579d8 Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Thu, 1 Feb 2018 16:09:44 +1100
Subject: [PATCH] powerpc/mm: Flush radix process translations when setting MMU
type
References: bsc#1061840
Patch-mainline: v4.16-rc2
Git-commit: 62e984ddfd6b056d399e24113f5e6a7145e579d8
Radix guests do normally invalidate process-scoped translations when a
new pid is allocated but migrated guests do not invalidate these so
migrated guests crash sometime, especially easy to reproduce with
migration happening within first 10 seconds after the guest boot start
on the same machine.
This adds the "Invalidate process-scoped translations" flush to fix
radix guests migration.
Fixes: 2ee13be34b13 ("KVM: PPC: Book3S HV: Update kvmppc_set_arch_compat() for ISA v3.00")
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Tested-by: Laurent Vivier <lvivier@redhat.com>
Tested-by: Daniel Henrique Barboza <danielhb@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michal Suchanek <msuchanek@suse.de>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
arch/powerpc/mm/pgtable_64.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index c9a623c2d8a2..d75dd5273d15 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -471,6 +471,8 @@ void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0,
if (old & PATB_HR) {
asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
+ asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
+ "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
trace_tlbie(lpid, 0, TLBIEL_INVAL_SET_LPID, lpid, 2, 0, 1);
} else {
asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : :
--
2.13.6