[RFC PATCH v2 06/12] powerpc/ptrace: split out SPE related functions.

From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	mikey@neuling.org
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [RFC PATCH v2 06/12] powerpc/ptrace: split out SPE related functions.
Date: Fri, 28 Jun 2019 15:47:55 +0000 (UTC)	[thread overview]
Message-ID: <a5f16b82b4d69bcb75c35bf795c5f21a123d309b.1561735588.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <cover.1561735587.git.christophe.leroy@c-s.fr>

Move CONFIG_SPE functions out of ptrace.c, into
ptrace-spe.c

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/ptrace/Makefile      |  1 +
 arch/powerpc/kernel/ptrace/ptrace-decl.h |  9 ++++
 arch/powerpc/kernel/ptrace/ptrace-spe.c  | 92 ++++++++++++++++++++++++++++++++
 arch/powerpc/kernel/ptrace/ptrace.c      | 66 -----------------------
 4 files changed, 102 insertions(+), 66 deletions(-)
 create mode 100644 arch/powerpc/kernel/ptrace/ptrace-spe.c

diff --git a/arch/powerpc/kernel/ptrace/Makefile b/arch/powerpc/kernel/ptrace/Makefile
index 522e6fd0b5b8..f87eadf6e072 100644
--- a/arch/powerpc/kernel/ptrace/Makefile
+++ b/arch/powerpc/kernel/ptrace/Makefile
@@ -12,3 +12,4 @@ ifneq ($(CONFIG_VSX),y)
 obj-y				+= ptrace-novsx.o
 endif
 obj-$(CONFIG_ALTIVEC)		+= ptrace-altivec.o
+obj-$(CONFIG_SPE)		+= ptrace-spe.o
diff --git a/arch/powerpc/kernel/ptrace/ptrace-decl.h b/arch/powerpc/kernel/ptrace/ptrace-decl.h
index 0f9282cb52fc..8a362f97f1d6 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-decl.h
+++ b/arch/powerpc/kernel/ptrace/ptrace-decl.h
@@ -26,6 +26,15 @@ int vr_set(struct task_struct *target, const struct user_regset *regset,
 	   unsigned int pos, unsigned int count,
 	   const void *kbuf, const void __user *ubuf);
 
+/* ptrace-spe */
+
+int evr_active(struct task_struct *target, const struct user_regset *regset);
+int evr_get(struct task_struct *target, const struct user_regset *regset,
+	    unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf);
+int evr_set(struct task_struct *target, const struct user_regset *regset,
+	    unsigned int pos, unsigned int count,
+	    const void *kbuf, const void __user *ubuf);
+
 /* ptrace */
 
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
diff --git a/arch/powerpc/kernel/ptrace/ptrace-spe.c b/arch/powerpc/kernel/ptrace/ptrace-spe.c
new file mode 100644
index 000000000000..b286fdf20feb
--- /dev/null
+++ b/arch/powerpc/kernel/ptrace/ptrace-spe.c
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/regset.h>
+#include <linux/tracehook.h>
+#include <linux/elf.h>
+#include <linux/user.h>
+#include <linux/security.h>
+#include <linux/signal.h>
+#include <linux/seccomp.h>
+#include <linux/audit.h>
+#include <trace/syscall.h>
+#include <linux/hw_breakpoint.h>
+#include <linux/perf_event.h>
+#include <linux/context_tracking.h>
+#include <linux/nospec.h>
+
+#include <linux/uaccess.h>
+#include <linux/pkeys.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/switch_to.h>
+#include <asm/tm.h>
+#include <asm/asm-prototypes.h>
+#include <asm/debug.h>
+#include <asm/hw_breakpoint.h>
+
+/*
+ * For get_evrregs/set_evrregs functions 'data' has the following layout:
+ *
+ * struct {
+ *   u32 evr[32];
+ *   u64 acc;
+ *   u32 spefscr;
+ * }
+ */
+
+int evr_active(struct task_struct *target, const struct user_regset *regset)
+{
+	flush_spe_to_thread(target);
+	return target->thread.used_spe ? regset->n : 0;
+}
+
+int evr_get(struct task_struct *target, const struct user_regset *regset,
+	    unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf)
+{
+	int ret;
+
+	flush_spe_to_thread(target);
+
+	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+				  &target->thread.evr,
+				  0, sizeof(target->thread.evr));
+
+	BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
+		     offsetof(struct thread_struct, spefscr));
+
+	if (!ret)
+		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
+					  &target->thread.acc,
+					  sizeof(target->thread.evr), -1);
+
+	return ret;
+}
+
+int evr_set(struct task_struct *target, const struct user_regset *regset,
+	    unsigned int pos, unsigned int count,
+	    const void *kbuf, const void __user *ubuf)
+{
+	int ret;
+
+	flush_spe_to_thread(target);
+
+	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+				 &target->thread.evr,
+				 0, sizeof(target->thread.evr));
+
+	BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
+		     offsetof(struct thread_struct, spefscr));
+
+	if (!ret)
+		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
+					 &target->thread.acc,
+					 sizeof(target->thread.evr), -1);
+
+	return ret;
+}
diff --git a/arch/powerpc/kernel/ptrace/ptrace.c b/arch/powerpc/kernel/ptrace/ptrace.c
index 198ccbfce544..711cccdc14e4 100644
--- a/arch/powerpc/kernel/ptrace/ptrace.c
+++ b/arch/powerpc/kernel/ptrace/ptrace.c
@@ -415,72 +415,6 @@ static int gpr_set(struct task_struct *target, const struct user_regset *regset,
 	return ret;
 }
 
-#ifdef CONFIG_SPE
-
-/*
- * For get_evrregs/set_evrregs functions 'data' has the following layout:
- *
- * struct {
- *   u32 evr[32];
- *   u64 acc;
- *   u32 spefscr;
- * }
- */
-
-static int evr_active(struct task_struct *target,
-		      const struct user_regset *regset)
-{
-	flush_spe_to_thread(target);
-	return target->thread.used_spe ? regset->n : 0;
-}
-
-static int evr_get(struct task_struct *target, const struct user_regset *regset,
-		   unsigned int pos, unsigned int count,
-		   void *kbuf, void __user *ubuf)
-{
-	int ret;
-
-	flush_spe_to_thread(target);
-
-	ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-				  &target->thread.evr,
-				  0, sizeof(target->thread.evr));
-
-	BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
-		     offsetof(struct thread_struct, spefscr));
-
-	if (!ret)
-		ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf,
-					  &target->thread.acc,
-					  sizeof(target->thread.evr), -1);
-
-	return ret;
-}
-
-static int evr_set(struct task_struct *target, const struct user_regset *regset,
-		   unsigned int pos, unsigned int count,
-		   const void *kbuf, const void __user *ubuf)
-{
-	int ret;
-
-	flush_spe_to_thread(target);
-
-	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-				 &target->thread.evr,
-				 0, sizeof(target->thread.evr));
-
-	BUILD_BUG_ON(offsetof(struct thread_struct, acc) + sizeof(u64) !=
-		     offsetof(struct thread_struct, spefscr));
-
-	if (!ret)
-		ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
-					 &target->thread.acc,
-					 sizeof(target->thread.evr), -1);
-
-	return ret;
-}
-#endif /* CONFIG_SPE */
-
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 /**
  * tm_cgpr_active - get active number of registers in CGPR
-- 
2.13.3

