From 16ed141677c5a1a796408e74ccd0a6f6554c3f21 Mon Sep 17 00:00:00 2001 From: Paul Mackerras Date: Mon, 30 Jan 2017 21:21:39 +1100 Subject: [PATCH] powerpc/64: Make type of partition table flush depend on partition type When changing a partition table entry on POWER9, we do a particular form of the tlbie instruction which flushes all TLBs and caches of the partition table for a given logical partition ID (LPID). This instruction has a field in the instruction word, labelled R (radix), which should be 1 if the partition was previously a radix partition and 0 if it was a HPT partition. This implements that logic. Signed-off-by: Paul Mackerras Signed-off-by: Michael Ellerman --- arch/powerpc/mm/pgtable_64.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 8bca7f58afc4..d6b5e5cde412 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -454,13 +454,23 @@ void __init mmu_partition_table_init(void) void mmu_partition_table_set_entry(unsigned int lpid, unsigned long dw0, unsigned long dw1) { + unsigned long old = be64_to_cpu(partition_tb[lpid].patb0); + partition_tb[lpid].patb0 = cpu_to_be64(dw0); partition_tb[lpid].patb1 = cpu_to_be64(dw1); - /* Global flush of TLBs and partition table caches for this lpid */ + /* + * Global flush of TLBs and partition table caches for this lpid. + * The type of flush (hash or radix) depends on what the previous + * use of this partition ID was, not the new use. + */ asm volatile("ptesync" : : : "memory"); - asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : : - "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); + if (old & PATB_HR) + asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : : + "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); + else + asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : : + "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid)); asm volatile("eieio; tlbsync; ptesync" : : : "memory"); } EXPORT_SYMBOL_GPL(mmu_partition_table_set_entry); -- 2.39.2