From 7cd2a8695ef9c31e8f51773f0de9e6007d6dc083 Mon Sep 17 00:00:00 2001 From: Suraj Jitindar Singh Date: Thu, 3 Aug 2017 14:15:51 +1000 Subject: [PATCH] powerpc/mm: Properly invalidate when setting process table base The host process table base is stored in the partition table by calling the function native_register_process_table(). Currently this just sets the entry in memory and is missing a subsequent cache invalidation instruction. Any update to the partition table should be followed by a cache invalidation instruction specifying invalidation of the caching of any partition table entries (RIC = 2, PRS = 0). We already have a function to update the partition table with the required cache invalidation instructions - mmu_partition_table_set_entry(). Update the native_register_process_table() function to call mmu_partition_table_set_entry(), this ensures all appropriate invalidation will be performed. Signed-off-by: Suraj Jitindar Singh Reviewed-by: Aneesh Kumar K.V [mpe: Use a local for patb0 to clean it up slightly] Signed-off-by: Michael Ellerman --- arch/powerpc/mm/pgtable-radix.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index c1185c8ecb22..5d8be076f8e5 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -28,9 +28,13 @@ static int native_register_process_table(unsigned long base, unsigned long pg_sz, unsigned long table_size) { - unsigned long patb1 = base | table_size | PATB_GR; + unsigned long patb0, patb1; + + patb0 = be64_to_cpu(partition_tb[0].patb0); + patb1 = base | table_size | PATB_GR; + + mmu_partition_table_set_entry(0, patb0, patb1); - partition_tb->patb1 = cpu_to_be64(patb1); return 0; } -- 2.20.1