powerpc/32s: get rid of CPU_FTR_601 feature

Now that 601 is exclusive from other 6xx, CPU_FTR_601 and
associated fixups are useless.

Drop this feature and use #ifdefs instead.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ecdb7194a17dbfa01865df6a82979533adc2c70b.1566834712.git.christophe.leroy@c-s.fr

2 files changed, 7 insertions, 10 deletions

diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index 50a1991d257f..84d5fab94f8f 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c
@@ -74,7 +74,7 @@ static int find_free_bat(void)
 {
 	int b;
 
-	if (cpu_has_feature(CPU_FTR_601)) {
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_601)) {
 		for (b = 0; b < 4; b++) {
 			struct ppc_bat *bat = BATS[b];
 
@@ -106,7 +106,7 @@ static int find_free_bat(void)
  */
 static unsigned int block_size(unsigned long base, unsigned long top)
 {
-	unsigned int max_size = (cpu_has_feature(CPU_FTR_601) ? 8 : 256) << 20;
+	unsigned int max_size = IS_ENABLED(CONFIG_PPC_BOOK3S_601) ? SZ_8M : SZ_256M;
 	unsigned int base_shift = (ffs(base) - 1) & 31;
 	unsigned int block_shift = (fls(top - base) - 1) & 31;
 
@@ -189,7 +189,7 @@ void mmu_mark_initmem_nx(void)
 	unsigned long top = (unsigned long)_etext - PAGE_OFFSET;
 	unsigned long size;
 
-	if (cpu_has_feature(CPU_FTR_601))
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_601))
 		return;
 
 	for (i = 0; i < nb - 1 && base < top && top - base > (128 << 10);) {
@@ -227,7 +227,7 @@ void mmu_mark_rodata_ro(void)
 	int nb = mmu_has_feature(MMU_FTR_USE_HIGH_BATS) ? 8 : 4;
 	int i;
 
-	if (cpu_has_feature(CPU_FTR_601))
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_601))
 		return;
 
 	for (i = 0; i < nb; i++) {
@@ -259,7 +259,7 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys,
 		flags &= ~_PAGE_COHERENT;
 
 	bl = (size >> 17) - 1;
-	if (PVR_VER(mfspr(SPRN_PVR)) != 1) {
+	if (!IS_ENABLED(CONFIG_PPC_BOOK3S_601)) {
 		/* 603, 604, etc. */
 		/* Do DBAT first */
 		wimgxpp = flags & (_PAGE_WRITETHRU | _PAGE_NO_CACHE
@@ -441,7 +441,7 @@ void setup_initial_memory_limit(phys_addr_t first_memblock_base,
 	BUG_ON(first_memblock_base != 0);
 
 	/* 601 can only access 16MB at the moment */
-	if (PVR_VER(mfspr(SPRN_PVR)) == 1)
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_601))
 		memblock_set_current_limit(min_t(u64, first_memblock_size, 0x01000000));
 	else /* Anything else has 256M mapped */
 		memblock_set_current_limit(min_t(u64, first_memblock_size, 0x10000000));
@@ -459,9 +459,6 @@ void __init setup_kuep(bool disabled)
 {
 	pr_info("Activating Kernel Userspace Execution Prevention\n");
 
-	if (cpu_has_feature(CPU_FTR_601))
-		pr_warn("KUEP is not working on powerpc 601 (No NX bit in Seg Regs)\n");
-
 	if (disabled)
 		pr_warn("KUEP cannot be disabled yet on 6xx when compiled in\n");
 }
diff --git a/arch/powerpc/mm/ptdump/bats.c b/arch/powerpc/mm/ptdump/bats.c
index a0d23e96e841..4154feac1da3 100644
--- a/arch/powerpc/mm/ptdump/bats.c
+++ b/arch/powerpc/mm/ptdump/bats.c
@@ -149,7 +149,7 @@ static int bats_show_603(struct seq_file *m, void *v)
 
 static int bats_open(struct inode *inode, struct file *file)
 {
-	if (cpu_has_feature(CPU_FTR_601))
+	if (IS_ENABLED(CONFIG_PPC_BOOK3S_601))
 		return single_open(file, bats_show_601, NULL);
 
 	return single_open(file, bats_show_603, NULL);