From 3b47b7549ead0719e94022c6742199333c7c8d9f Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Fri, 27 Nov 2020 10:14:07 +0530
Subject: [PATCH] powerpc/book3s64/kuap: Move KUAP related function outside
 radix

The next set of patches adds support for kuap with hash translation.
In preparation for that rename/move kuap related functions to
non radix names.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201127044424.40686-6-aneesh.kumar@linux.ibm.com
---
 .../include/asm/book3s/64/{kup-radix.h => kup.h}   |  6 +++---
 arch/powerpc/include/asm/kup.h                     |  4 +++-
 arch/powerpc/mm/book3s64/pkeys.c                   | 22 ++++++++++++++++++++++
 arch/powerpc/mm/book3s64/radix_pgtable.c           | 19 -------------------
 4 files changed, 28 insertions(+), 23 deletions(-)
 rename arch/powerpc/include/asm/book3s/64/{kup-radix.h => kup.h} (97%)

diff --git a/arch/powerpc/include/asm/book3s/64/kup-radix.h b/arch/powerpc/include/asm/book3s/64/kup.h
similarity index 97%
rename from arch/powerpc/include/asm/book3s/64/kup-radix.h
rename to arch/powerpc/include/asm/book3s/64/kup.h
index 2fb8ee7..8735d2d 100644
--- a/arch/powerpc/include/asm/book3s/64/kup-radix.h
+++ b/arch/powerpc/include/asm/book3s/64/kup.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H
-#define _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H
+#ifndef _ASM_POWERPC_BOOK3S_64_KUP_H
+#define _ASM_POWERPC_BOOK3S_64_KUP_H
 
 #include <linux/const.h>
 #include <asm/reg.h>
@@ -202,4 +202,4 @@ static inline void restore_user_access(unsigned long flags)
 }
 #endif /* __ASSEMBLY__ */
 
-#endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */
+#endif /* _ASM_POWERPC_BOOK3S_64_KUP_H */
diff --git a/arch/powerpc/include/asm/kup.h b/arch/powerpc/include/asm/kup.h
index 0d93331..a06e50b 100644
--- a/arch/powerpc/include/asm/kup.h
+++ b/arch/powerpc/include/asm/kup.h
@@ -15,11 +15,13 @@
 #define KUAP_CURRENT		(KUAP_CURRENT_READ | KUAP_CURRENT_WRITE)
 
 #ifdef CONFIG_PPC_BOOK3S_64
-#include <asm/book3s/64/kup-radix.h>
+#include <asm/book3s/64/kup.h>
 #endif
+
 #ifdef CONFIG_PPC_8xx
 #include <asm/nohash/32/kup-8xx.h>
 #endif
+
 #ifdef CONFIG_PPC_BOOK3S_32
 #include <asm/book3s/32/kup.h>
 #endif
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c
index 7dc71f8..c75994c 100644
--- a/arch/powerpc/mm/book3s64/pkeys.c
+++ b/arch/powerpc/mm/book3s64/pkeys.c
@@ -9,9 +9,12 @@
 #include <asm/mmu_context.h>
 #include <asm/mmu.h>
 #include <asm/setup.h>
+#include <asm/smp.h>
+
 #include <linux/pkeys.h>
 #include <linux/of_fdt.h>
 
+
 int  num_pkey;		/* Max number of pkeys supported */
 /*
  *  Keys marked in the reservation list cannot be allocated by  userspace
@@ -226,6 +229,25 @@ out:
 	return;
 }
 
+#ifdef CONFIG_PPC_KUAP
+void __init setup_kuap(bool disabled)
+{
+	if (disabled || !early_radix_enabled())
+		return;
+
+	if (smp_processor_id() == boot_cpuid) {
+		pr_info("Activating Kernel Userspace Access Prevention\n");
+		cur_cpu_spec->mmu_features |= MMU_FTR_RADIX_KUAP;
+	}
+
+	/*
+	 * Set the default kernel AMR values on all cpus.
+	 */
+	mtspr(SPRN_AMR, AMR_KUAP_BLOCKED);
+	isync();
+}
+#endif
+
 static inline u64 read_amr(void)
 {
 	return mfspr(SPRN_AMR);
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index f5f248d..fe2c26d 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -609,25 +609,6 @@ void setup_kuep(bool disabled)
 }
 #endif
 
-#ifdef CONFIG_PPC_KUAP
-void setup_kuap(bool disabled)
-{
-	if (disabled || !early_radix_enabled())
-		return;
-
-	if (smp_processor_id() == boot_cpuid) {
-		pr_info("Activating Kernel Userspace Access Prevention\n");
-		cur_cpu_spec->mmu_features |= MMU_FTR_RADIX_KUAP;
-	}
-
-	/*
-	 * Set the default kernel AMR values on all cpus.
-	 */
-	mtspr(SPRN_AMR, AMR_KUAP_BLOCKED);
-	isync();
-}
-#endif
-
 void __init radix__early_init_mmu(void)
 {
 	unsigned long lpcr;
-- 
2.7.4