powerpc/kuap: MMU_FTR_BOOK3S_KUAP becomes MMU_FTR_KUAP

In order to reuse MMU_FTR_BOOK3S_KUAP for other targets than BOOK3S,
rename it MMU_FTR_KUAP.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c8b6f7b8cd0eeaace96879ed0e0a157faa619451.1689091022.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/book3s/64/hash-pkey.h

@@ -24,7 +24,7 @@ static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags)
 		    ((pteflags & H_PTE_PKEY_BIT1) ? HPTE_R_KEY_BIT1 : 0x0UL) |
 		    ((pteflags & H_PTE_PKEY_BIT0) ? HPTE_R_KEY_BIT0 : 0x0UL));
 
-	if (mmu_has_feature(MMU_FTR_BOOK3S_KUAP) ||
+	if (mmu_has_feature(MMU_FTR_KUAP) ||
 	    mmu_has_feature(MMU_FTR_BOOK3S_KUEP)) {
 		if ((pte_pkey == 0) && (flags & HPTE_USE_KERNEL_KEY))
 			return HASH_DEFAULT_KERNEL_KEY;

arch/powerpc/include/asm/book3s/64/kup.h

@@ -31,7 +31,7 @@
 	mfspr	\gpr2, SPRN_AMR
 	cmpd	\gpr1, \gpr2
 	beq	99f
-	END_MMU_FTR_SECTION_NESTED_IFCLR(MMU_FTR_BOOK3S_KUAP, 68)
+	END_MMU_FTR_SECTION_NESTED_IFCLR(MMU_FTR_KUAP, 68)
 
 	isync
 	mtspr	SPRN_AMR, \gpr1
@@ -78,7 +78,7 @@
 	 * No need to restore IAMR when returning to kernel space.
 	 */
 100:
-	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_BOOK3S_KUAP, 67)
+	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_KUAP, 67)
 #endif
 .endm
 
@@ -91,7 +91,7 @@
 	LOAD_REG_IMMEDIATE(\gpr2, AMR_KUAP_BLOCKED)
 999:	tdne	\gpr1, \gpr2
 	EMIT_WARN_ENTRY 999b, __FILE__, __LINE__, (BUGFLAG_WARNING | BUGFLAG_ONCE)
-	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_BOOK3S_KUAP, 67)
+	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_KUAP, 67)
 #endif
 .endm
 #endif
@@ -130,7 +130,7 @@
 	 */
 	BEGIN_MMU_FTR_SECTION_NESTED(68)
 	b	100f  // skip_save_amr
-	END_MMU_FTR_SECTION_NESTED_IFCLR(MMU_FTR_PKEY | MMU_FTR_BOOK3S_KUAP, 68)
+	END_MMU_FTR_SECTION_NESTED_IFCLR(MMU_FTR_PKEY | MMU_FTR_KUAP, 68)
 
 	/*
 	 * if pkey is disabled and we are entering from userspace
@@ -166,7 +166,7 @@
 	mtspr	SPRN_AMR, \gpr2
 	isync
 102:
-	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_BOOK3S_KUAP, 69)
+	END_MMU_FTR_SECTION_NESTED_IFSET(MMU_FTR_KUAP, 69)
 
 	/*
 	 * if entering from kernel we don't need save IAMR
@@ -232,7 +232,7 @@ static inline u64 current_thread_iamr(void)
 
 static __always_inline bool kuap_is_disabled(void)
 {
-	return !mmu_has_feature(MMU_FTR_BOOK3S_KUAP);
+	return !mmu_has_feature(MMU_FTR_KUAP);
 }
 
 static inline void kuap_user_restore(struct pt_regs *regs)
@@ -243,7 +243,7 @@ static inline void kuap_user_restore(struct pt_regs *regs)
 	if (!mmu_has_feature(MMU_FTR_PKEY))
 		return;
 
-	if (!mmu_has_feature(MMU_FTR_BOOK3S_KUAP)) {
+	if (!mmu_has_feature(MMU_FTR_KUAP)) {
 		amr = mfspr(SPRN_AMR);
 		if (amr != regs->amr)
 			restore_amr = true;
@@ -317,7 +317,7 @@ static inline unsigned long get_kuap(void)
 	 * This has no effect in terms of actually blocking things on hash,
 	 * so it doesn't break anything.
 	 */
-	if (!mmu_has_feature(MMU_FTR_BOOK3S_KUAP))
+	if (!mmu_has_feature(MMU_FTR_KUAP))
 		return AMR_KUAP_BLOCKED;
 
 	return mfspr(SPRN_AMR);
@@ -325,7 +325,7 @@ static inline unsigned long get_kuap(void)
 
 static __always_inline void set_kuap(unsigned long value)
 {
-	if (!mmu_has_feature(MMU_FTR_BOOK3S_KUAP))
+	if (!mmu_has_feature(MMU_FTR_KUAP))
 		return;
 
 	/*

arch/powerpc/include/asm/mmu.h

@@ -33,7 +33,7 @@
  * key 0 controlling userspace addresses on radix
  * Key 3 on hash
  */
-#define MMU_FTR_BOOK3S_KUAP		ASM_CONST(0x00000200)
+#define MMU_FTR_KUAP		ASM_CONST(0x00000200)
 
 /*
  * Supports KUEP feature
@@ -188,7 +188,7 @@ enum {
 #endif /* CONFIG_PPC_RADIX_MMU */
 #endif
 #ifdef CONFIG_PPC_KUAP
-	MMU_FTR_BOOK3S_KUAP |
+	MMU_FTR_KUAP |
 #endif /* CONFIG_PPC_KUAP */
 #ifdef CONFIG_PPC_MEM_KEYS
 	MMU_FTR_PKEY |

arch/powerpc/kernel/syscall.c

@@ -46,7 +46,7 @@ notrace long system_call_exception(struct pt_regs *regs, unsigned long r0)
 		iamr = mfspr(SPRN_IAMR);
 		regs->amr  = amr;
 		regs->iamr = iamr;
-		if (mmu_has_feature(MMU_FTR_BOOK3S_KUAP)) {
+		if (mmu_has_feature(MMU_FTR_KUAP)) {
 			mtspr(SPRN_AMR, AMR_KUAP_BLOCKED);
 			flush_needed = true;
 		}

arch/powerpc/mm/book3s64/pkeys.c

@@ -291,7 +291,7 @@ void setup_kuap(bool disabled)
 
 	if (smp_processor_id() == boot_cpuid) {
 		pr_info("Activating Kernel Userspace Access Prevention\n");
-		cur_cpu_spec->mmu_features |= MMU_FTR_BOOK3S_KUAP;
+		cur_cpu_spec->mmu_features |= MMU_FTR_KUAP;
 	}
 
 	/*