powerpc/64s: remove register_process_table callback

This callback is only required because the partition table init comes
before process table allocation on powernv (aka bare metal aka native).

Change the order to allocate the process table first, and remove the
callback.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190902152931.17840-2-npiggin@gmail.com

1 files changed, 12 insertions, 33 deletions

diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index 71b649473045..83fa7864e8f4 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -34,19 +34,6 @@
 unsigned int mmu_pid_bits;
 unsigned int mmu_base_pid;
 
-static int native_register_process_table(unsigned long base, unsigned long pg_sz,
-					 unsigned long table_size)
-{
-	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);
-
-	return 0;
-}
-
 static __ref void *early_alloc_pgtable(unsigned long size, int nid,
 			unsigned long region_start, unsigned long region_end)
 {
@@ -381,18 +368,8 @@ static void __init radix_init_pgtable(void)
 	 */
 	rts_field = radix__get_tree_size();
 	process_tb->prtb0 = cpu_to_be64(rts_field | __pa(init_mm.pgd) | RADIX_PGD_INDEX_SIZE);
-	/*
-	 * Fill in the partition table. We are suppose to use effective address
-	 * of process table here. But our linear mapping also enable us to use
-	 * physical address here.
-	 */
-	register_process_table(__pa(process_tb), 0, PRTB_SIZE_SHIFT - 12);
+
 	pr_info("Process table %p and radix root for kernel: %p\n", process_tb, init_mm.pgd);
-	asm volatile("ptesync" : : : "memory");
-	asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
-		     "r" (TLBIEL_INVAL_SET_LPID), "r" (0));
-	asm volatile("eieio; tlbsync; ptesync" : : : "memory");
-	trace_tlbie(0, 0, TLBIEL_INVAL_SET_LPID, 0, 2, 1, 1);
 
 	/*
 	 * The init_mm context is given the first available (non-zero) PID,
@@ -413,22 +390,24 @@ static void __init radix_init_pgtable(void)
 
 static void __init radix_init_partition_table(void)
 {
-	unsigned long rts_field, dw0;
+	unsigned long rts_field, dw0, dw1;
 
 	mmu_partition_table_init();
 	rts_field = radix__get_tree_size();
 	dw0 = rts_field | __pa(init_mm.pgd) | RADIX_PGD_INDEX_SIZE | PATB_HR;
-	mmu_partition_table_set_entry(0, dw0, 0);
+	dw1 = __pa(process_tb) | (PRTB_SIZE_SHIFT - 12) | PATB_GR;
+	mmu_partition_table_set_entry(0, dw0, dw1);
+
+	asm volatile("ptesync" : : : "memory");
+	asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
+		     "r" (TLBIEL_INVAL_SET_LPID), "r" (0));
+	asm volatile("eieio; tlbsync; ptesync" : : : "memory");
+	trace_tlbie(0, 0, TLBIEL_INVAL_SET_LPID, 0, 2, 1, 1);
 
 	pr_info("Initializing Radix MMU\n");
 	pr_info("Partition table %p\n", partition_tb);
 }
 
-void __init radix_init_native(void)
-{
-	register_process_table = native_register_process_table;
-}
-
 static int __init get_idx_from_shift(unsigned int shift)
 {
 	int idx = -1;
@@ -622,8 +601,9 @@ void __init radix__early_init_mmu(void)
 	__pmd_frag_nr = RADIX_PMD_FRAG_NR;
 	__pmd_frag_size_shift = RADIX_PMD_FRAG_SIZE_SHIFT;
 
+	radix_init_pgtable();
+
 	if (!firmware_has_feature(FW_FEATURE_LPAR)) {
-		radix_init_native();
 		lpcr = mfspr(SPRN_LPCR);
 		mtspr(SPRN_LPCR, lpcr | LPCR_UPRT | LPCR_HR);
 		radix_init_partition_table();
@@ -634,7 +614,6 @@ void __init radix__early_init_mmu(void)
 
 	memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE);
 
-	radix_init_pgtable();
 	/* Switch to the guard PID before turning on MMU */
 	radix__switch_mmu_context(NULL, &init_mm);
 	if (cpu_has_feature(CPU_FTR_HVMODE))