Merge tag 'csky-for-linus-5.2-rc1' of git://github.com/c-sky/csky-linux

Pull arch/csky updates from Guo Ren:

 - Fixup vdsp&fpu issues in kernel

 - Add dynamic function tracer

 - Use in_syscall & forget_syscall instead of r11_sig

 - Reconstruct signal processing

 - Support dynamic start physical address

 - Fixup wrong update_mmu_cache implementation

 - Support vmlinux bootup with MMU off

 - Use va_pa_offset instead of phys_offset

 - Fixup syscall_trace return processing flow

 - Add perf callchain support

 - Add perf_arch_fetch_caller_regs support

 - Add page fault perf event support

 - Add support for perf registers sampling

* tag 'csky-for-linus-5.2-rc1' of git://github.com/c-sky/csky-linux:
  csky/syscall_trace: Fixup return processing flow
  csky: Fixup compile warning
  csky: Add support for perf registers sampling
  csky: add page fault perf event support
  csky: Use va_pa_offset instead of phys_offset
  csky: Support vmlinux bootup with MMU off
  csky: Add perf_arch_fetch_caller_regs support
  csky: Fixup wrong update_mmu_cache implementation
  csky: Support dynamic start physical address
  csky: Reconstruct signal processing
  csky: Use in_syscall & forget_syscall instead of r11_sig
  csky: Add non-uapi asm/ptrace.h namespace
  csky: mm/fault.c: Remove duplicate header
  csky: remove redundant generic-y
  csky: Update syscall_trace_enter/exit implementation
  csky: Add perf callchain support
  csky/ftrace: Add dynamic function tracer (include graph tracer)
  csky: Fixup vdsp&fpu issues in kernel

33 files changed, 887 insertions, 502 deletions

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 6555d1781132..941e3e2adf41 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -29,15 +29,20 @@ config CSKY
 	select GENERIC_SCHED_CLOCK
 	select GENERIC_SMP_IDLE_THREAD
 	select HAVE_ARCH_TRACEHOOK
+	select HAVE_ARCH_AUDITSYSCALL
+	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FUNCTION_TRACER
 	select HAVE_FUNCTION_GRAPH_TRACER
+	select HAVE_FTRACE_MCOUNT_RECORD
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_LZO
 	select HAVE_KERNEL_LZMA
 	select HAVE_PERF_EVENTS
-	select HAVE_C_RECORDMCOUNT
+	select HAVE_PERF_REGS
+	select HAVE_PERF_USER_STACK_DUMP
 	select HAVE_DMA_API_DEBUG
 	select HAVE_DMA_CONTIGUOUS
+	select HAVE_SYSCALL_TRACEPOINTS
 	select MAY_HAVE_SPARSE_IRQ
 	select MODULES_USE_ELF_RELA if MODULES
 	select OF
diff --git a/arch/csky/Makefile b/arch/csky/Makefile
index 3607a6e8f66c..6b87f6c22ad6 100644
--- a/arch/csky/Makefile
+++ b/arch/csky/Makefile
@@ -36,7 +36,7 @@ endif
 
 ifneq ($(CSKYABI),)
 MCPU_STR = $(CPUTYPE)$(FPUEXT)$(VDSPEXT)$(TEEEXT)
-KBUILD_CFLAGS += -mcpu=$(MCPU_STR)
+KBUILD_CFLAGS += -mcpu=$(CPUTYPE) -Wa,-mcpu=$(MCPU_STR)
 KBUILD_CFLAGS += -DCSKYCPU_DEF_NAME=\"$(MCPU_STR)\"
 KBUILD_CFLAGS += -msoft-float -mdiv
 KBUILD_CFLAGS += -fno-tree-vectorize
diff --git a/arch/csky/abiv1/inc/abi/ckmmu.h b/arch/csky/abiv1/inc/abi/ckmmu.h
index 3a002017bebe..81f37715c0d2 100644
--- a/arch/csky/abiv1/inc/abi/ckmmu.h
+++ b/arch/csky/abiv1/inc/abi/ckmmu.h
@@ -40,6 +40,26 @@ static inline void write_mmu_entryhi(int value)
 	cpwcr("cpcr4", value);
 }
 
+static inline unsigned long read_mmu_msa0(void)
+{
+	return cprcr("cpcr30");
+}
+
+static inline void write_mmu_msa0(unsigned long value)
+{
+	cpwcr("cpcr30", value);
+}
+
+static inline unsigned long read_mmu_msa1(void)
+{
+	return cprcr("cpcr31");
+}
+
+static inline void write_mmu_msa1(unsigned long value)
+{
+	cpwcr("cpcr31", value);
+}
+
 /*
  * TLB operations.
  */
@@ -65,11 +85,11 @@ static inline void tlb_invalid_indexed(void)
 
 static inline void setup_pgd(unsigned long pgd, bool kernel)
 {
-	cpwcr("cpcr29", pgd);
+	cpwcr("cpcr29", pgd | BIT(0));
 }
 
 static inline unsigned long get_pgd(void)
 {
-	return cprcr("cpcr29");
+	return cprcr("cpcr29") & ~BIT(0);
 }
 #endif /* __ASM_CSKY_CKMMUV1_H */
diff --git a/arch/csky/abiv1/inc/abi/entry.h b/arch/csky/abiv1/inc/abi/entry.h
index 3f3faab3d747..7ab78bd0f3b1 100644
--- a/arch/csky/abiv1/inc/abi/entry.h
+++ b/arch/csky/abiv1/inc/abi/entry.h
@@ -16,9 +16,6 @@
 #define LSAVE_A4	40
 #define LSAVE_A5	44
 
-#define EPC_INCREASE	2
-#define EPC_KEEP	0
-
 .macro USPTOKSP
 	mtcr	sp, ss1
 	mfcr	sp, ss0
@@ -29,10 +26,6 @@
 	mfcr	sp, ss1
 .endm
 
-.macro INCTRAP	rx
-	addi	\rx, EPC_INCREASE
-.endm
-
 .macro	SAVE_ALL epc_inc
 	mtcr    r13, ss2
 	mfcr    r13, epsr
@@ -150,11 +143,35 @@
 	cpwcr   \rx, cpcr8
 .endm
 
-.macro SETUP_MMU rx
-	lrw	\rx, PHYS_OFFSET | 0xe
-	cpwcr	\rx, cpcr30
-	lrw	\rx, (PHYS_OFFSET + 0x20000000) | 0xe
-	cpwcr	\rx, cpcr31
+.macro SETUP_MMU
+	/* Init psr and enable ee */
+	lrw	r6, DEFAULT_PSR_VALUE
+	mtcr    r6, psr
+	psrset  ee
+
+	/* Select MMU as co-processor */
+	cpseti	cp15
+
+	/*
+	 * cpcr30 format:
+	 * 31 - 29 | 28 - 4 | 3 | 2 | 1 | 0
+	 *   BA     Reserved  C   D   V
+	 */
+	cprcr	r6, cpcr30
+	lsri	r6, 28
+	lsli	r6, 28
+	addi	r6, 0xe
+	cpwcr	r6, cpcr30
+
+	lsri	r6, 28
+	addi	r6, 2
+	lsli	r6, 28
+	addi	r6, 0xe
+	cpwcr	r6, cpcr31
 .endm
 
+.macro ANDI_R3 rx, imm
+	lsri	\rx, 3
+	andi	\rx, (\imm >> 3)
+.endm
 #endif /* __ASM_CSKY_ENTRY_H */
diff --git a/arch/csky/abiv1/inc/abi/regdef.h b/arch/csky/abiv1/inc/abi/regdef.h
index 876689291b71..104707fbdcc1 100644
--- a/arch/csky/abiv1/inc/abi/regdef.h
+++ b/arch/csky/abiv1/inc/abi/regdef.h
@@ -5,9 +5,8 @@
 #define __ASM_CSKY_REGDEF_H
 
 #define syscallid	r1
-#define r11_sig		r11
-
 #define regs_syscallid(regs) regs->regs[9]
+#define regs_fp(regs) regs->regs[2]
 
 /*
  * PSR format:
@@ -23,4 +22,6 @@
 
 #define SYSTRACE_SAVENUM	2
 
+#define TRAP0_SIZE		2
+
 #endif /* __ASM_CSKY_REGDEF_H */
diff --git a/arch/csky/abiv2/cacheflush.c b/arch/csky/abiv2/cacheflush.c
index d22c95ffc74d..5bb887b275e1 100644
--- a/arch/csky/abiv2/cacheflush.c
+++ b/arch/csky/abiv2/cacheflush.c
@@ -34,10 +34,6 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 {
 	unsigned long addr, pfn;
 	struct page *page;
-	void *va;
-
-	if (!(vma->vm_flags & VM_EXEC))
-		return;
 
 	pfn = pte_pfn(*pte);
 	if (unlikely(!pfn_valid(pfn)))
@@ -47,14 +43,9 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 	if (page == ZERO_PAGE(0))
 		return;
 
-	va = page_address(page);
-	addr = (unsigned long) va;
-
-	if (va == NULL && PageHighMem(page))
-		addr = (unsigned long) kmap_atomic(page);
+	addr = (unsigned long) kmap_atomic(page);
 
 	cache_wbinv_range(addr, addr + PAGE_SIZE);
 
-	if (va == NULL && PageHighMem(page))
-		kunmap_atomic((void *) addr);
+	kunmap_atomic((void *) addr);
 }
diff --git a/arch/csky/abiv2/inc/abi/ckmmu.h b/arch/csky/abiv2/inc/abi/ckmmu.h
index 97230ad9427c..e4480e6bc3b3 100644
--- a/arch/csky/abiv2/inc/abi/ckmmu.h
+++ b/arch/csky/abiv2/inc/abi/ckmmu.h
@@ -42,6 +42,26 @@ static inline void write_mmu_entryhi(int value)
 	mtcr("cr<4, 15>", value);
 }
 
+static inline unsigned long read_mmu_msa0(void)
+{
+	return mfcr("cr<30, 15>");
+}
+
+static inline void write_mmu_msa0(unsigned long value)
+{
+	mtcr("cr<30, 15>", value);
+}
+
+static inline unsigned long read_mmu_msa1(void)
+{
+	return mfcr("cr<31, 15>");
+}
+
+static inline void write_mmu_msa1(unsigned long value)
+{
+	mtcr("cr<31, 15>", value);
+}
+
 /*
  * TLB operations.
  */
@@ -70,18 +90,16 @@ static inline void tlb_invalid_indexed(void)
 	mtcr("cr<8, 15>", 0x02000000);
 }
 
-/* setup hardrefil pgd */
-static inline unsigned long get_pgd(void)
-{
-	return mfcr("cr<29, 15>");
-}
-
 static inline void setup_pgd(unsigned long pgd, bool kernel)
 {
 	if (kernel)
-		mtcr("cr<28, 15>", pgd);
+		mtcr("cr<28, 15>", pgd | BIT(0));
 	else
-		mtcr("cr<29, 15>", pgd);
+		mtcr("cr<29, 15>", pgd | BIT(0));
 }
 
+static inline unsigned long get_pgd(void)
+{
+	return mfcr("cr<29, 15>") & ~BIT(0);
+}
 #endif /* __ASM_CSKY_CKMMUV2_H */
diff --git a/arch/csky/abiv2/inc/abi/entry.h b/arch/csky/abiv2/inc/abi/entry.h
index edc5cc04c4de..9897a16b45e5 100644
--- a/arch/csky/abiv2/inc/abi/entry.h
+++ b/arch/csky/abiv2/inc/abi/entry.h
@@ -14,18 +14,11 @@
 #define LSAVE_A2	32
 #define LSAVE_A3	36
 
-#define EPC_INCREASE	4
-#define EPC_KEEP	0
-
 #define KSPTOUSP
 #define USPTOKSP
 
 #define usp cr<14, 1>
 
-.macro INCTRAP	rx
-	addi	\rx, EPC_INCREASE
-.endm
-
 .macro SAVE_ALL epc_inc
 	subi    sp, 152
 	stw	tls, (sp, 0)
@@ -169,10 +162,80 @@
 	mtcr	\rx, cr<8, 15>
 .endm
 
-.macro SETUP_MMU rx
-	lrw	\rx, PHYS_OFFSET | 0xe
-	mtcr	\rx, cr<30, 15>
-	lrw	\rx, (PHYS_OFFSET + 0x20000000) | 0xe
-	mtcr	\rx, cr<31, 15>
+.macro SETUP_MMU
+	/* Init psr and enable ee */
+	lrw	r6, DEFAULT_PSR_VALUE
+	mtcr    r6, psr
+	psrset  ee
+
+	/* Invalid I/Dcache BTB BHT */
+	movi	r6, 7
+	lsli	r6, 16
+	addi	r6, (1<<4) | 3
+	mtcr	r6, cr17
+
+	/* Invalid all TLB */
+	bgeni   r6, 26
+	mtcr	r6, cr<8, 15> /* Set MCIR */
+
+	/* Check MMU on/off */
+	mfcr	r6, cr18
+	btsti	r6, 0
+	bt	1f
+
+	/* MMU off: setup mapping tlb entry */
+	movi	r6, 0
+	mtcr	r6, cr<6, 15> /* Set MPR with 4K page size */
+
+	grs	r6, 1f /* Get current pa by PC */
+	bmaski  r7, (PAGE_SHIFT + 1) /* r7 = 0x1fff */
+	andn    r6, r7
+	mtcr	r6, cr<4, 15> /* Set MEH */
+
+	mov	r8, r6
+	movi    r7, 0x00000006
+	or      r8, r7
+	mtcr	r8, cr<2, 15> /* Set MEL0 */
+	movi    r7, 0x00001006
+	or      r8, r7
+	mtcr	r8, cr<3, 15> /* Set MEL1 */
+
+	bgeni   r8, 28
+	mtcr	r8, cr<8, 15> /* Set MCIR to write TLB */
+
+	br	2f
+1:
+	/*
+	 * MMU on: use origin MSA value from bootloader
+	 *
+	 * cr<30/31, 15> MSA register format:
+	 * 31 - 29 | 28 - 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
+	 *   BA     Reserved  SH  WA  B   SO SEC  C   D   V
+	 */
+	mfcr	r6, cr<30, 15> /* Get MSA0 */
+2:
+	lsri	r6, 28
+	lsli	r6, 28
+	addi	r6, 0x1ce
+	mtcr	r6, cr<30, 15> /* Set MSA0 */
+
+	lsri	r6, 28
+	addi	r6, 2
+	lsli	r6, 28
+	addi	r6, 0x1ce
+	mtcr	r6, cr<31, 15> /* Set MSA1 */
+
+	/* enable MMU */
+	mfcr    r6, cr18
+	bseti	r6, 0
+	mtcr    r6, cr18
+
+	jmpi	3f /* jump to va */
+3:
+.endm
+
+.macro ANDI_R3 rx, imm
+	lsri	\rx, 3
+	andi	\rx, (\imm >> 3)
 .endm
 #endif /* __ASM_CSKY_ENTRY_H */
diff --git a/arch/csky/abiv2/inc/abi/regdef.h b/arch/csky/abiv2/inc/abi/regdef.h
index c72abb781bdc..d7328bbc1ce7 100644
--- a/arch/csky/abiv2/inc/abi/regdef.h
+++ b/arch/csky/abiv2/inc/abi/regdef.h
@@ -5,9 +5,8 @@
 #define __ASM_CSKY_REGDEF_H
 
 #define syscallid	r7
-#define r11_sig		r11
-
 #define regs_syscallid(regs) regs->regs[3]
+#define regs_fp(regs) regs->regs[4]
 
 /*
  * PSR format:
@@ -23,4 +22,6 @@
 
 #define SYSTRACE_SAVENUM	5
 
+#define TRAP0_SIZE		4
+
 #endif /* __ASM_CSKY_REGDEF_H */
diff --git a/arch/csky/abiv2/mcount.S b/arch/csky/abiv2/mcount.S
index c633379956f5..326402e65f9e 100644
--- a/arch/csky/abiv2/mcount.S
+++ b/arch/csky/abiv2/mcount.S
@@ -61,10 +61,17 @@
 	addi	sp, 16
 .endm
 
+.macro nop32_stub
+	nop32
+	nop32
+	nop32
+.endm
+
 ENTRY(ftrace_stub)
 	jmp	lr
 END(ftrace_stub)
 
+#ifndef CONFIG_DYNAMIC_FTRACE
 ENTRY(_mcount)
 	mcount_enter
 
@@ -76,7 +83,7 @@ ENTRY(_mcount)
 	bf	skip_ftrace
 
 	mov	a0, lr
-	subi	a0, MCOUNT_INSN_SIZE
+	subi	a0, 4
 	ldw	a1, (sp, 24)
 
 	jsr	r26
@@ -101,13 +108,41 @@ skip_ftrace:
 	mcount_exit
 #endif
 END(_mcount)
+#else /* CONFIG_DYNAMIC_FTRACE */
+ENTRY(_mcount)
+	mov	t1, lr
+	ldw	lr, (sp, 0)
+	addi	sp, 4
+	jmp	t1
+ENDPROC(_mcount)
+
+ENTRY(ftrace_caller)
+	mcount_enter
+
+	ldw	a0, (sp, 16)
+	subi	a0, 4
+	ldw	a1, (sp, 24)
+
+	nop
+GLOBAL(ftrace_call)
+	nop32_stub
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+	nop
+GLOBAL(ftrace_graph_call)
+	nop32_stub
+#endif
+
+	mcount_exit
+ENDPROC(ftrace_caller)
+#endif /* CONFIG_DYNAMIC_FTRACE */
 
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 ENTRY(ftrace_graph_caller)
 	mov	a0, sp
 	addi	a0, 24
 	ldw	a1, (sp, 16)
-	subi	a1, MCOUNT_INSN_SIZE
+	subi	a1, 4
 	mov	a2, r8
 	lrw	r26, prepare_ftrace_return
 	jsr	r26
diff --git a/arch/csky/abiv2/memmove.S b/arch/csky/abiv2/memmove.S
index b0c42ecf1889..5721e73ad3d8 100644
--- a/arch/csky/abiv2/memmove.S
+++ b/arch/csky/abiv2/memmove.S
@@ -35,11 +35,7 @@ ENTRY(memmove)
 .L_len_larger_16bytes:
 	subi	r1, 16
 	subi	r0, 16
-#if defined(__CSKY_VDSPV2__)
-	vldx.8	vr0, (r1), r19
-	PRE_BNEZAD (r18)
-	vstx.8	vr0, (r0), r19
-#elif defined(__CK860__)
+#if defined(__CK860__)
 	ldw	r3, (r1, 12)
 	stw	r3, (r0, 12)
 	ldw	r3, (r1, 8)
diff --git a/arch/csky/include/asm/Kbuild b/arch/csky/include/asm/Kbuild
index 95f4e550db8a..a9b63efef416 100644
--- a/arch/csky/include/asm/Kbuild
+++ b/arch/csky/include/asm/Kbuild
@@ -12,7 +12,6 @@ generic-y += dma-mapping.h
 generic-y += emergency-restart.h
 generic-y += exec.h
 generic-y += fb.h
-generic-y += ftrace.h
 generic-y += futex.h
 generic-y += gpio.h
 generic-y += hardirq.h
diff --git a/arch/csky/include/asm/ftrace.h b/arch/csky/include/asm/ftrace.h
index 7547c45312a8..ba35d93ecda2 100644
--- a/arch/csky/include/asm/ftrace.h
+++ b/arch/csky/include/asm/ftrace.h
@@ -4,10 +4,26 @@
 #ifndef __ASM_CSKY_FTRACE_H
 #define __ASM_CSKY_FTRACE_H
 
-#define MCOUNT_INSN_SIZE 4
+#define MCOUNT_INSN_SIZE	14
 
 #define HAVE_FUNCTION_GRAPH_FP_TEST
 
 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
 
+#define MCOUNT_ADDR	((unsigned long)_mcount)
+
+#ifndef __ASSEMBLY__
+
+extern void _mcount(unsigned long);
+
+extern void ftrace_graph_call(void);
+
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+	return addr;
+}
+
+struct dyn_arch_ftrace {
+};
+#endif /* !__ASSEMBLY__ */
 #endif /* __ASM_CSKY_FTRACE_H */
diff --git a/arch/csky/include/asm/mmu_context.h b/arch/csky/include/asm/mmu_context.h
index b2905c0485a7..734db3a122e1 100644
--- a/arch/csky/include/asm/mmu_context.h
+++ b/arch/csky/include/asm/mmu_context.h
@@ -14,23 +14,10 @@
 #include <linux/sched.h>
 #include <abi/ckmmu.h>
 
-static inline void tlbmiss_handler_setup_pgd(unsigned long pgd, bool kernel)
-{
-	pgd -= PAGE_OFFSET;
-	pgd += PHYS_OFFSET;
-	pgd |= 1;
-	setup_pgd(pgd, kernel);
-}
-
 #define TLBMISS_HANDLER_SETUP_PGD(pgd) \
-	tlbmiss_handler_setup_pgd((unsigned long)pgd, 0)
+	setup_pgd(__pa(pgd), false)
 #define TLBMISS_HANDLER_SETUP_PGD_KERNEL(pgd) \
-	tlbmiss_handler_setup_pgd((unsigned long)pgd, 1)
-
-static inline unsigned long tlb_get_pgd(void)
-{
-	return ((get_pgd() - PHYS_OFFSET) & ~1) + PAGE_OFFSET;
-}
+	setup_pgd(__pa(pgd), true)
 
 #define cpu_context(cpu, mm)	((mm)->context.asid[cpu])
 #define cpu_asid(cpu, mm)	(cpu_context((cpu), (mm)) & ASID_MASK)
diff --git a/arch/csky/include/asm/page.h b/arch/csky/include/asm/page.h
index 73cf2bd66a13..9738eacefdc7 100644
--- a/arch/csky/include/asm/page.h
+++ b/arch/csky/include/asm/page.h
@@ -8,7 +8,7 @@
 #include <linux/const.h>
 
 /*
- * PAGE_SHIFT determines the page size
+ * PAGE_SHIFT determines the page size: 4KB
  */
 #define PAGE_SHIFT	12
 #define PAGE_SIZE	(_AC(1, UL) << PAGE_SHIFT)
@@ -17,12 +17,18 @@
 #define THREAD_MASK	(~(THREAD_SIZE - 1))
 #define THREAD_SHIFT	(PAGE_SHIFT + 1)
 
+
 /*
- * NOTE: virtual isn't really correct, actually it should be the offset into the
- * memory node, but we have no highmem, so that works for now.
- * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
- * of the shifts unnecessary.
+ * For C-SKY "User-space:Kernel-space" is "2GB:2GB" fixed by hardware and there
+ * are two segment registers (MSA0 + MSA1) to mapping 512MB + 512MB physical
+ * address region. We use them mapping kernel 1GB direct-map address area and
+ * for more than 1GB of memory we use highmem.
  */
+#define PAGE_OFFSET	0x80000000
+#define SSEG_SIZE	0x20000000
+#define LOWMEM_LIMIT	(SSEG_SIZE * 2)
+
+#define PHYS_OFFSET_OFFSET (CONFIG_RAM_BASE & (SSEG_SIZE - 1))
 
 #ifndef __ASSEMBLY__
 
@@ -50,9 +56,6 @@ struct page;
 
 struct vm_area_struct;
 
-/*
- * These are used to make use of C type-checking..
- */
 typedef struct { unsigned long pte_low; } pte_t;
 #define pte_val(x)	((x).pte_low)
 
@@ -69,18 +72,13 @@ typedef struct page *pgtable_t;
 #define __pgd(x)	((pgd_t) { (x) })
 #define __pgprot(x)	((pgprot_t) { (x) })
 
-#endif /* !__ASSEMBLY__ */
+extern unsigned long va_pa_offset;
 
-#define PHYS_OFFSET		(CONFIG_RAM_BASE & ~(LOWMEM_LIMIT - 1))
-#define PHYS_OFFSET_OFFSET	(CONFIG_RAM_BASE & (LOWMEM_LIMIT - 1))
-#define ARCH_PFN_OFFSET		PFN_DOWN(CONFIG_RAM_BASE)
+#define ARCH_PFN_OFFSET	PFN_DOWN(va_pa_offset + PHYS_OFFSET_OFFSET)
 
-#define	PAGE_OFFSET	0x80000000
-#define LOWMEM_LIMIT	0x40000000
+#define __pa(x)		 ((unsigned long)(x) - PAGE_OFFSET + va_pa_offset)
+#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - va_pa_offset))
 
-#define __pa(x)		((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
-#define __va(x)		((void *)((unsigned long)(x) + PAGE_OFFSET - \
-				  PHYS_OFFSET))
 #define __pa_symbol(x)	__pa(RELOC_HIDE((unsigned long)(x), 0))
 
 #define MAP_NR(x)	PFN_DOWN((unsigned long)(x) - PAGE_OFFSET - \
@@ -90,15 +88,10 @@ typedef struct page *pgtable_t;
 #define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
 				VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
-/*
- * main RAM and kernel working space are coincident at 0x80000000, but to make
- * life more interesting, there's also an uncached virtual shadow at 0xb0000000
- * - these mappings are fixed in the MMU
- */
-
 #define pfn_to_kaddr(x)	__va(PFN_PHYS(x))
 
 #include <asm-generic/memory_model.h>
 #include <asm-generic/getorder.h>
 
+#endif /* !__ASSEMBLY__ */
 #endif /* __ASM_CSKY_PAGE_H */
diff --git a/arch/csky/include/asm/perf_event.h b/arch/csky/include/asm/perf_event.h
index ea8193122294..572093e11001 100644
--- a/arch/csky/include/asm/perf_event.h
+++ b/arch/csky/include/asm/perf_event.h
@@ -4,4 +4,12 @@
 #ifndef __ASM_CSKY_PERF_EVENT_H
 #define __ASM_CSKY_PERF_EVENT_H
 
+#include <abi/regdef.h>
+
+#define perf_arch_fetch_caller_regs(regs, __ip) { \
+	(regs)->pc = (__ip); \
+	regs_fp(regs) = (unsigned long) __builtin_frame_address(0); \
+	asm volatile("mov %0, sp\n":"=r"((regs)->usp)); \
+}
+
 #endif /* __ASM_PERF_EVENT_ELF_H */
diff --git a/arch/csky/include/asm/ptrace.h b/arch/csky/include/asm/ptrace.h
new file mode 100644
index 000000000000..d0aba7b32417
--- /dev/null
+++ b/arch/csky/include/asm/ptrace.h
@@ -0,0 +1,41 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef __ASM_CSKY_PTRACE_H
+#define __ASM_CSKY_PTRACE_H
+
+#include <uapi/asm/ptrace.h>
+#include <asm/traps.h>
+#include <linux/types.h>
+
+#ifndef __ASSEMBLY__
+
+#define PS_S	0x80000000 /* Supervisor Mode */
+
+#define arch_has_single_step() (1)
+#define current_pt_regs() \
+({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; })
+
+#define user_stack_pointer(regs) ((regs)->usp)
+
+#define user_mode(regs) (!((regs)->sr & PS_S))
+#define instruction_pointer(regs) ((regs)->pc)
+#define profile_pc(regs) instruction_pointer(regs)
+
+static inline bool in_syscall(struct pt_regs const *regs)
+{
+	return ((regs->sr >> 16) & 0xff) == VEC_TRAP0;
+}
+
+static inline void forget_syscall(struct pt_regs *regs)
+{
+	regs->sr &= ~(0xff << 16);
+}
+
+static inline unsigned long regs_return_value(struct pt_regs *regs)
+{
+	return regs->a0;
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_CSKY_PTRACE_H */
diff --git a/arch/csky/include/asm/syscall.h b/arch/csky/include/asm/syscall.h
index bc0d8717d28b..f624fa3bbc22 100644
--- a/arch/csky/include/asm/syscall.h
+++ b/arch/csky/include/asm/syscall.h
@@ -8,6 +8,8 @@
 #include <abi/regdef.h>
 #include <uapi/linux/audit.h>
 
+extern void *sys_call_table[];
+
 static inline int
 syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 {
@@ -15,6 +17,13 @@ syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 }
 
 static inline void
+syscall_set_nr(struct task_struct *task, struct pt_regs *regs,
+	       int sysno)
+{
+	regs_syscallid(regs) = sysno;
+}
+
+static inline void
 syscall_rollback(struct task_struct *task, struct pt_regs *regs)
 {
 	regs->a0 = regs->orig_a0;
diff --git a/arch/csky/include/asm/thread_info.h b/arch/csky/include/asm/thread_info.h
index 0e9d035d712b..0b546a55a8bf 100644
--- a/arch/csky/include/asm/thread_info.h
+++ b/arch/csky/include/asm/thread_info.h
@@ -51,29 +51,26 @@ static inline struct thread_info *current_thread_info(void)
 
 #endif /* !__ASSEMBLY__ */
 
-/* entry.S relies on these definitions!
- * bits 0-5 are tested at every exception exit
- */
 #define TIF_SIGPENDING		0	/* signal pending */
 #define TIF_NOTIFY_RESUME	1       /* callback before returning to user */
 #define TIF_NEED_RESCHED	2	/* rescheduling necessary */
-#define TIF_SYSCALL_TRACE	5	/* syscall trace active */
-#define TIF_DELAYED_TRACE	14	/* single step a syscall */
+#define TIF_SYSCALL_TRACE	3	/* syscall trace active */
+#define TIF_SYSCALL_TRACEPOINT	4       /* syscall tracepoint instrumentation */
+#define TIF_SYSCALL_AUDIT	5	/* syscall auditing */
 #define TIF_POLLING_NRFLAG	16	/* poll_idle() is TIF_NEED_RESCHED */
 #define TIF_MEMDIE		18      /* is terminating due to OOM killer */
-#define TIF_FREEZE		19	/* thread is freezing for suspend */
 #define TIF_RESTORE_SIGMASK	20	/* restore signal mask in do_signal() */
 #define TIF_SECCOMP		21	/* secure computing */
 
-#define _TIF_SIGPENDING         (1 << TIF_SIGPENDING)
-#define _TIF_NOTIFY_RESUME      (1 << TIF_NOTIFY_RESUME)
-#define _TIF_NEED_RESCHED       (1 << TIF_NEED_RESCHED)
-#define _TIF_SYSCALL_TRACE      (1 << TIF_SYSCALL_TRACE)
-#define _TIF_DELAYED_TRACE	(1 << TIF_DELAYED_TRACE)
-#define _TIF_POLLING_NRFLAG     (1 << TIF_POLLING_NRFLAG)
+#define _TIF_SIGPENDING		(1 << TIF_SIGPENDING)
+#define _TIF_NOTIFY_RESUME	(1 << TIF_NOTIFY_RESUME)
+#define _TIF_NEED_RESCHED	(1 << TIF_NEED_RESCHED)
+#define _TIF_SYSCALL_TRACE	(1 << TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_TRACEPOINT	(1 << TIF_SYSCALL_TRACEPOINT)
+#define _TIF_SYSCALL_AUDIT	(1 << TIF_SYSCALL_AUDIT)
+#define _TIF_POLLING_NRFLAG	(1 << TIF_POLLING_NRFLAG)
 #define _TIF_MEMDIE		(1 << TIF_MEMDIE)
-#define _TIF_FREEZE             (1 << TIF_FREEZE)
-#define _TIF_RESTORE_SIGMASK    (1 << TIF_RESTORE_SIGMASK)
-#define _TIF_SECCOMP            (1 << TIF_SECCOMP)
+#define _TIF_RESTORE_SIGMASK	(1 << TIF_RESTORE_SIGMASK)
+#define _TIF_SECCOMP		(1 << TIF_SECCOMP)
 
 #endif	/* _ASM_CSKY_THREAD_INFO_H */
diff --git a/arch/csky/include/asm/unistd.h b/arch/csky/include/asm/unistd.h
index 284487477a61..da7a18295615 100644
--- a/arch/csky/include/asm/unistd.h
+++ b/arch/csky/include/asm/unistd.h
@@ -2,3 +2,5 @@
 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
 
 #include <uapi/asm/unistd.h>
+
+#define NR_syscalls (__NR_syscalls)
diff --git a/arch/csky/include/uapi/asm/perf_regs.h b/arch/csky/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..ee323d818592
--- /dev/null
+++ b/arch/csky/include/uapi/asm/perf_regs.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
+
+#ifndef _ASM_CSKY_PERF_REGS_H
+#define _ASM_CSKY_PERF_REGS_H
+
+/* Index of struct pt_regs */
+enum perf_event_csky_regs {
+	PERF_REG_CSKY_TLS,
+	PERF_REG_CSKY_LR,
+	PERF_REG_CSKY_PC,
+	PERF_REG_CSKY_SR,
+	PERF_REG_CSKY_SP,
+	PERF_REG_CSKY_ORIG_A0,
+	PERF_REG_CSKY_A0,
+	PERF_REG_CSKY_A1,
+	PERF_REG_CSKY_A2,
+	PERF_REG_CSKY_A3,
+	PERF_REG_CSKY_REGS0,
+	PERF_REG_CSKY_REGS1,
+	PERF_REG_CSKY_REGS2,
+	PERF_REG_CSKY_REGS3,
+	PERF_REG_CSKY_REGS4,
+	PERF_REG_CSKY_REGS5,
+	PERF_REG_CSKY_REGS6,
+	PERF_REG_CSKY_REGS7,
+	PERF_REG_CSKY_REGS8,
+	PERF_REG_CSKY_REGS9,
+#if defined(__CSKYABIV2__)
+	PERF_REG_CSKY_EXREGS0,
+	PERF_REG_CSKY_EXREGS1,
+	PERF_REG_CSKY_EXREGS2,
+	PERF_REG_CSKY_EXREGS3,
+	PERF_REG_CSKY_EXREGS4,
+	PERF_REG_CSKY_EXREGS5,
+	PERF_REG_CSKY_EXREGS6,
+	PERF_REG_CSKY_EXREGS7,
+	PERF_REG_CSKY_EXREGS8,
+	PERF_REG_CSKY_EXREGS9,
+	PERF_REG_CSKY_EXREGS10,
+	PERF_REG_CSKY_EXREGS11,
+	PERF_REG_CSKY_EXREGS12,
+	PERF_REG_CSKY_EXREGS13,
+	PERF_REG_CSKY_EXREGS14,
+	PERF_REG_CSKY_HI,
+	PERF_REG_CSKY_LO,
+	PERF_REG_CSKY_DCSR,
+#endif
+	PERF_REG_CSKY_MAX,
+};
+#endif /* _ASM_CSKY_PERF_REGS_H */
diff --git a/arch/csky/i