From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/arch/arm/kernel/entry-common.S | 38 ++++++++++++++++++++++++++++++--------
1 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/kernel/arch/arm/kernel/entry-common.S b/kernel/arch/arm/kernel/entry-common.S
index 0465d65..a30b1a1 100644
--- a/kernel/arch/arm/kernel/entry-common.S
+++ b/kernel/arch/arm/kernel/entry-common.S
@@ -1,11 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/kernel/entry-common.S
*
* Copyright (C) 2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <asm/assembler.h>
@@ -56,7 +53,7 @@
cmp r2, #TASK_SIZE
blne addr_limit_check_failed
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
+ movs r1, r1, lsl #16
bne fast_work_pending
@@ -93,8 +90,9 @@
cmp r2, #TASK_SIZE
blne addr_limit_check_failed
ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
- tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
+ movs r1, r1, lsl #16
beq no_work_pending
+do_slower_path:
UNWIND(.fnend )
ENDPROC(ret_fast_syscall)
@@ -134,7 +132,7 @@
cmp r2, #TASK_SIZE
blne addr_limit_check_failed
ldr r1, [tsk, #TI_FLAGS]
- tst r1, #_TIF_WORK_MASK
+ movs r1, r1, lsl #16
bne slow_work_pending
no_work_pending:
asm_trace_hardirqs_on save = 0
@@ -166,12 +164,36 @@
*/
.align 5
+#ifdef CONFIG_HARDEN_BRANCH_HISTORY
+ENTRY(vector_bhb_loop8_swi)
+ sub sp, sp, #PT_REGS_SIZE
+ stmia sp, {r0 - r12}
+ mov r8, #8
+1: b 2f
+2: subs r8, r8, #1
+ bne 1b
+ dsb
+ isb
+ b 3f
+ENDPROC(vector_bhb_loop8_swi)
+
+ .align 5
+ENTRY(vector_bhb_bpiall_swi)
+ sub sp, sp, #PT_REGS_SIZE
+ stmia sp, {r0 - r12}
+ mcr p15, 0, r8, c7, c5, 6 @ BPIALL
+ isb
+ b 3f
+ENDPROC(vector_bhb_bpiall_swi)
+#endif
+ .align 5
ENTRY(vector_swi)
#ifdef CONFIG_CPU_V7M
v7m_exception_entry
#else
sub sp, sp, #PT_REGS_SIZE
stmia sp, {r0 - r12} @ Calling r0 - r12
+3:
ARM( add r8, sp, #S_PC )
ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr
THUMB( mov r8, sp )
@@ -373,7 +395,7 @@
movhs scno, #0
csdb
#endif
- stmloia sp, {r5, r6} @ shuffle args
+ stmialo sp, {r5, r6} @ shuffle args
movlo r0, r1
movlo r1, r2
movlo r2, r3
--
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