Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 25451dc1 authored by Wooyeon Kim's avatar Wooyeon Kim Committed by Todd Kjos
Browse files

ANDROID: vendor_hooks: FPSIMD save/restore by using vendor_hooks 



 - To use fpsimd in kernel task, vendor_hook call is needed to
   save/restore fpsimd at scheduling time.
 - ANDROID_VENDOR_DATA added to thread_struct.
 - Vendor_hooks is called when thread is switching for save/restore
   fpsimd states.
  (trace_android_vh_is_fpsimd_save(prev, next))

Bug: 149632552
Bug: 165161482

Signed-off-by: default avatarWooyeon Kim <wooy88.kim@samsung.com>
Change-Id: I853e1b6a9a51e24f770423bbc39fdd84265d78fc
parent 2f0f512e

arch/arm64/include/asm/processor.h

+3 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/init.h>

#include <linux/stddef.h>

#include <linux/string.h>

#include <linux/android_vendor.h>



#include <vdso/processor.h>
@@ -138,6 +139,8 @@ struct thread_struct { 
		struct user_fpsimd_state fpsimd_state;

	} uw;



	ANDROID_VENDOR_DATA(1);



	unsigned int		fpsimd_cpu;

	void			*sve_state;	/* SVE registers, if any */

	unsigned int		sve_vl;		/* SVE vector length */

arch/arm64/kernel/process.c

+3 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ 
#include <linux/percpu.h>

#include <linux/thread_info.h>

#include <linux/prctl.h>

#include <trace/hooks/fpsimd.h>



#include <asm/alternative.h>

#include <asm/arch_gicv3.h>
@@ -520,6 +521,8 @@ __notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev, 
	 */

	dsb(ish);



	trace_android_vh_is_fpsimd_save(prev, next);



	/* the actual thread switch */

	last = cpu_switch_to(prev, next);

drivers/android/vendor_hooks.c

+2 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <trace/hooks/binder.h>

#include <trace/hooks/rwsem.h>

#include <trace/hooks/futex.h>

#include <trace/hooks/fpsimd.h>



/*

 * Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -42,3 +43,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake); 
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_finished);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_rwsem_list_add);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_futex_plist_add);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_is_fpsimd_save);

include/trace/hooks/fpsimd.h

0 → 100644
+26 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#undef TRACE_SYSTEM

#define TRACE_SYSTEM fpsimd



#define TRACE_INCLUDE_PATH trace/hooks



#if !defined(_TRACE_HOOK_FPSIMD_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_HOOK_FPSIMD_H



#include <linux/tracepoint.h>

#include <trace/hooks/vendor_hooks.h>



#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_ANDROID_VENDOR_HOOKS)

struct task_struct;



DECLARE_HOOK(android_vh_is_fpsimd_save,

	TP_PROTO(struct task_struct *prev, struct task_struct *next),

	TP_ARGS(prev, next))

#else



#define trace_android_vh_is_fpsimd_save(prev, next)

#endif



#endif /* _TRACE_HOOK_FPSIMD_H */

/* This part must be outside protection */

#include <trace/define_trace.h>