patches/old/powerpc-64e-drop-e500-ifdefs-in-64-bit-code.patch

From: Michael Ellerman <mpe@ellerman.id.au>
Subject: powerpc/64e: drop E500 ifdefs in 64-bit code
Date: Tue, 2 Jul 2024 15:51:15 +0200

All 64-bit Book3E have E500=y, so drop the unneeded ifdefs.

Link: https://lkml.kernel.org/r/7fb88809c88a1b774063eda602a9333079403f83.1719928057.git.christophe.leroy@csgroup.eu
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/powerpc/mm/nohash/tlb_64e.c |   12 ------------
 1 file changed, 12 deletions(-)

--- a/arch/powerpc/mm/nohash/tlb_64e.c~powerpc-64e-drop-e500-ifdefs-in-64-bit-code
+++ a/arch/powerpc/mm/nohash/tlb_64e.c
@@ -85,7 +85,6 @@ static void __init setup_page_sizes(void
 	unsigned int eptcfg;
 	int psize;
 
-#ifdef CONFIG_PPC_E500
 	unsigned int mmucfg = mfspr(SPRN_MMUCFG);
 	int fsl_mmu = mmu_has_feature(MMU_FTR_TYPE_FSL_E);
 
@@ -151,7 +150,6 @@ static void __init setup_page_sizes(void
 
 		goto out;
 	}
-#endif
 out:
 	/* Cleanup array and print summary */
 	pr_info("MMU: Supported page sizes\n");
@@ -180,13 +178,11 @@ static void __init setup_mmu_htw(void)
 	 */
 
 	switch (book3e_htw_mode) {
-#ifdef CONFIG_PPC_E500
 	case PPC_HTW_E6500:
 		extlb_level_exc = EX_TLB_SIZE;
 		patch_exception(0x1c0, exc_data_tlb_miss_e6500_book3e);
 		patch_exception(0x1e0, exc_instruction_tlb_miss_e6500_book3e);
 		break;
-#endif
 	}
 	pr_info("MMU: Book3E HW tablewalk %s\n",
 		book3e_htw_mode != PPC_HTW_NONE ? "enabled" : "not supported");
@@ -217,7 +213,6 @@ static void early_init_this_mmu(void)
 	}
 	mtspr(SPRN_MAS4, mas4);
 
-#ifdef CONFIG_PPC_E500
 	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		unsigned int num_cams;
 		bool map = true;
@@ -238,7 +233,6 @@ static void early_init_this_mmu(void)
 			linear_map_top = map_mem_in_cams(linear_map_top,
 							 num_cams, false, true);
 	}
-#endif
 
 	/* A sync won't hurt us after mucking around with
 	 * the MMU configuration
@@ -270,7 +264,6 @@ static void __init early_init_mmu_global
 	/* Look for HW tablewalk support */
 	setup_mmu_htw();
 
-#ifdef CONFIG_PPC_E500
 	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		if (book3e_htw_mode == PPC_HTW_NONE) {
 			extlb_level_exc = EX_TLB_SIZE;
@@ -279,7 +272,6 @@ static void __init early_init_mmu_global
 				exc_instruction_tlb_miss_bolted_book3e);
 		}
 	}
-#endif
 
 	/* Set the global containing the top of the linear mapping
 	 * for use by the TLB miss code
@@ -291,7 +283,6 @@ static void __init early_init_mmu_global
 
 static void __init early_mmu_set_memory_limit(void)
 {
-#ifdef CONFIG_PPC_E500
 	if (mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		/*
 		 * Limit memory so we dont have linear faults.
@@ -302,7 +293,6 @@ static void __init early_mmu_set_memory_
 		 */
 		memblock_enforce_memory_limit(linear_map_top);
 	}
-#endif
 
 	memblock_set_current_limit(linear_map_top);
 }
@@ -340,7 +330,6 @@ void setup_initial_memory_limit(phys_add
 	 * We crop it to the size of the first MEMBLOCK to
 	 * avoid going over total available memory just in case...
 	 */
-#ifdef CONFIG_PPC_E500
 	if (early_mmu_has_feature(MMU_FTR_TYPE_FSL_E)) {
 		unsigned long linear_sz;
 		unsigned int num_cams;
@@ -353,7 +342,6 @@ void setup_initial_memory_limit(phys_add
 
 		ppc64_rma_size = min_t(u64, linear_sz, 0x40000000);
 	} else
-#endif
 		ppc64_rma_size = min_t(u64, first_memblock_size, 0x40000000);
 
 	/* Finally limit subsequent allocations */
_