13 files changed, 97 insertions, 42 deletions
diff --git a/arch/parisc/include/asm/alternative.h b/arch/parisc/include/asm/alternative.h
index 793d8baa3a10..0ec54f43d6d2 100644
--- a/arch/parisc/include/asm/alternative.h
+++ b/arch/parisc/include/asm/alternative.h
@@ -8,6 +8,7 @@
 #define ALT_COND_NO_ICACHE	0x04	/* if system has no i-cache  */
 #define ALT_COND_NO_SPLIT_TLB	0x08	/* if split_tlb == 0  */
 #define ALT_COND_NO_IOC_FDC	0x10	/* if I/O cache does not need flushes */
+#define ALT_COND_RUN_ON_QEMU	0x20	/* if running on QEMU */
 
 #define INSN_PxTLB	0x02		/* modify pdtlb, pitlb */
 #define INSN_NOP	0x08000240	/* nop */
@@ -21,7 +22,7 @@
 
 struct alt_instr {
 	s32 orig_offset;	/* offset to original instructions */
-	u32 len;		/* end of original instructions */
+	s32 len;		/* end of original instructions */
 	u32 cond;		/* see ALT_COND_XXX */
 	u32 replacement;	/* replacement instruction or code */
 };
@@ -40,12 +41,20 @@ void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
 
 #else
 
+/* to replace one single instructions by a new instruction */
 #define ALTERNATIVE(from, to, cond, replacement)\
 	.section .altinstructions, "aw"	!	\
 	.word (from - .), (to - from)/4	!	\
 	.word cond, replacement		!	\
 	.previous
 
+/* to replace multiple instructions by new code */
+#define ALTERNATIVE_CODE(from, num_instructions, cond, new_instr_ptr)\
+	.section .altinstructions, "aw"	!	\
+	.word (from - .), -num_instructions !	\
+	.word cond, (new_instr_ptr - .)	!	\
+	.previous
+
 #endif  /*  __ASSEMBLY__  */
 
 #endif /* __ASM_PARISC_ALTERNATIVE_H */
diff --git a/arch/parisc/include/asm/fixmap.h b/arch/parisc/include/asm/fixmap.h
index 288da73d4cc0..e480b2c05407 100644
--- a/arch/parisc/include/asm/fixmap.h
+++ b/arch/parisc/include/asm/fixmap.h
@@ -30,6 +30,7 @@
 enum fixed_addresses {
 	/* Support writing RO kernel text via kprobes, jump labels, etc. */
 	FIX_TEXT_POKE0,
+	FIX_TEXT_KEXEC,
 	FIX_BITMAP_COUNT
 };
 
diff --git a/arch/parisc/include/asm/ftrace.h b/arch/parisc/include/asm/ftrace.h
index 42b2c75a1645..a7cf0d05ccf4 100644
--- a/arch/parisc/include/asm/ftrace.h
+++ b/arch/parisc/include/asm/ftrace.h
@@ -5,12 +5,24 @@
 #ifndef __ASSEMBLY__
 extern void mcount(void);
 
-#define MCOUNT_INSN_SIZE 4
-
+#define MCOUNT_ADDR		((unsigned long)mcount)
+#define MCOUNT_INSN_SIZE	4
+#define CC_USING_NOP_MCOUNT
+#define ARCH_SUPPORTS_FTRACE_OPS 1
 extern unsigned long sys_call_table[];
 
 extern unsigned long return_address(unsigned int);
 
+#ifdef CONFIG_DYNAMIC_FTRACE
+extern void ftrace_caller(void);
+
+struct dyn_arch_ftrace {
+};
+
+unsigned long ftrace_call_adjust(unsigned long addr);
+
+#endif
+
 #define ftrace_return_address(n) return_address(n)
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/parisc/include/asm/kexec.h b/arch/parisc/include/asm/kexec.h
new file mode 100644
index 000000000000..a99ea747d7ed
--- /dev/null
+++ b/arch/parisc/include/asm/kexec.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_PARISC_KEXEC_H
+#define _ASM_PARISC_KEXEC_H
+
+#ifdef CONFIG_KEXEC
+
+/* Maximum physical address we can use pages from */
+#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
+/* Maximum address we can reach in physical address mode */
+#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
+/* Maximum address we can use for the control code buffer */
+#define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
+
+#define KEXEC_CONTROL_PAGE_SIZE	4096
+
+#define KEXEC_ARCH KEXEC_ARCH_PARISC
+#define ARCH_HAS_KIMAGE_ARCH
+
+#ifndef __ASSEMBLY__
+
+struct kimage_arch {
+	unsigned long initrd_start;
+	unsigned long initrd_end;
+	unsigned long cmdline;
+};
+
+static inline void crash_setup_regs(struct pt_regs *newregs,
+				    struct pt_regs *oldregs)
+{
+	/* Dummy implementation for now */
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* CONFIG_KEXEC */
+
+#endif /* _ASM_PARISC_KEXEC_H */
diff --git a/arch/parisc/include/asm/kprobes.h b/arch/parisc/include/asm/kprobes.h
index e09cf2deeafe..904034da4974 100644
--- a/arch/parisc/include/asm/kprobes.h
+++ b/arch/parisc/include/asm/kprobes.h
@@ -50,6 +50,10 @@ struct kprobe_ctlblk {
 
 int __kprobes parisc_kprobe_break_handler(struct pt_regs *regs);
 int __kprobes parisc_kprobe_ss_handler(struct pt_regs *regs);
+static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+{
+	return 0;
+}
 
 #endif /* CONFIG_KPROBES */
 #endif /* _PARISC_KPROBES_H */
diff --git a/arch/parisc/include/asm/patch.h b/arch/parisc/include/asm/patch.h
index 685b58a13968..400d84c6e504 100644
--- a/arch/parisc/include/asm/patch.h
+++ b/arch/parisc/include/asm/patch.h
@@ -4,8 +4,10 @@
 
 /* stop machine and patch kernel text */
 void patch_text(void *addr, unsigned int insn);
+void patch_text_multiple(void *addr, u32 *insn, unsigned int len);
 
 /* patch kernel text with machine already stopped (e.g. in kgdb) */
-void __patch_text(void *addr, unsigned int insn);
+void __patch_text(void *addr, u32 insn);
+void __patch_text_multiple(void *addr, u32 *insn, unsigned int len);
 
 #endif
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index 19bb2e46cd36..b388d8176588 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -91,6 +91,7 @@ int pdc_sti_call(unsigned long func, unsigned long flags,
                  unsigned long inptr, unsigned long outputr,
                  unsigned long glob_cfg);
 
+int __pdc_cpu_rendezvous(void);
 static inline char * os_id_to_string(u16 os_id) {
 	switch(os_id) {
 	case OS_ID_NONE:	return "No OS";
diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h
index ea75cc966dae..d98647c29b74 100644
--- a/arch/parisc/include/asm/pgalloc.h
+++ b/arch/parisc/include/asm/pgalloc.h
@@ -10,6 +10,8 @@
 
 #include <asm/cache.h>
 
+#include <asm-generic/pgalloc.h>	/* for pte_{alloc,free}_one */
+
 /* Allocate the top level pgd (page directory)
  *
  * Here (for 64 bit kernels) we implement a Hybrid L2/L3 scheme: we
@@ -122,37 +124,4 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 	pmd_populate_kernel(mm, pmd, page_address(pte_page))
 #define pmd_pgtable(pmd) pmd_page(pmd)
 
-static inline pgtable_t
-pte_alloc_one(struct mm_struct *mm)
-{
-	struct page *page = alloc_page(GFP_KERNEL|__GFP_ZERO);
-	if (!page)
-		return NULL;
-	if (!pgtable_page_ctor(page)) {
-		__free_page(page);
-		return NULL;
-	}
-	return page;
-}
-
-static inline pte_t *
-pte_alloc_one_kernel(struct mm_struct *mm)
-{
-	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
-	return pte;
-}
-
-static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
-{
-	free_page((unsigned long)pte);
-}
-
-static inline void pte_free(struct mm_struct *mm, struct page *pte)
-{
-	pgtable_page_dtor(pte);
-	pte_free_kernel(mm, page_address(pte));
-}
-
-#define check_pgt_cache()	do { } while (0)
-
 #endif
diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h
index a39b079e73f2..4ac374b3a99f 100644
--- a/arch/parisc/include/asm/pgtable.h
+++ b/arch/parisc/include/asm/pgtable.h
@@ -2,6 +2,7 @@
 #ifndef _PARISC_PGTABLE_H
 #define _PARISC_PGTABLE_H
 
+#include <asm/page.h>
 #include <asm-generic/4level-fixup.h>
 
 #include <asm/fixmap.h>
@@ -98,8 +99,6 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 
 #endif /* !__ASSEMBLY__ */
 
-#include <asm/page.h>
-
 #define pte_ERROR(e) \
 	printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
 #define pmd_ERROR(e) \
@@ -133,8 +132,6 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
 #define PTRS_PER_PTE    (1UL << BITS_PER_PTE)
 
 /* Definitions for 2nd level */
-#define pgtable_cache_init()	do { } while (0)
-
 #define PMD_SHIFT       (PLD_SHIFT + BITS_PER_PTE)
 #define PMD_SIZE	(1UL << PMD_SHIFT)
 #define PMD_MASK	(~(PMD_SIZE-1))
diff --git a/arch/parisc/include/asm/psw.h b/arch/parisc/include/asm/psw.h
index 76c301146c31..46921ffcc407 100644
--- a/arch/parisc/include/asm/psw.h
+++ b/arch/parisc/include/asm/psw.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _PARISC_PSW_H
-
+#define _PARISC_PSW_H
 
 #define	PSW_I	0x00000001
 #define	PSW_D	0x00000002
diff --git a/arch/parisc/include/asm/string.h b/arch/parisc/include/asm/string.h
index f6e1132f4e35..4a0c9dbd62fd 100644
--- a/arch/parisc/include/asm/string.h
+++ b/arch/parisc/include/asm/string.h
@@ -8,4 +8,19 @@ extern void * memset(void *, int, size_t);
 #define __HAVE_ARCH_MEMCPY
 void * memcpy(void * dest,const void *src,size_t count);
 
+#define __HAVE_ARCH_STRLEN
+extern size_t strlen(const char *s);
+
+#define __HAVE_ARCH_STRCPY
+extern char *strcpy(char *dest, const char *src);
+
+#define __HAVE_ARCH_STRNCPY
+extern char *strncpy(char *dest, const char *src, size_t count);
+
+#define __HAVE_ARCH_STRCAT
+extern char *strcat(char *dest, const char *src);
+
+#define __HAVE_ARCH_MEMSET
+extern void *memset(void *, int, size_t);
+
 #endif
diff --git a/arch/parisc/include/asm/syscall.h b/arch/parisc/include/asm/syscall.h
index 80757e43cf2c..00b127a5e09b 100644
--- a/arch/parisc/include/asm/syscall.h
+++ b/arch/parisc/include/asm/syscall.h
@@ -29,6 +29,13 @@ static inline void syscall_get_arguments(struct task_struct *tsk,
 	args[0] = regs->gr[26];
 }
 
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	unsigned long error = regs->gr[28];
+	return IS_ERR_VALUE(error) ? error : 0;
+}
+
 static inline long syscall_get_return_value(struct task_struct *task,
 						struct pt_regs *regs)
 {
diff --git a/arch/parisc/include/asm/unistd.h b/arch/parisc/include/asm/unistd.h
index b0838dc4dfee..cd438e4150f6 100644
--- a/arch/parisc/include/asm/unistd.h
+++ b/arch/parisc/include/asm/unistd.h
@@ -166,6 +166,7 @@ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5)	\
 #define __ARCH_WANT_SYS_FORK
 #define __ARCH_WANT_SYS_VFORK
 #define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_CLONE3
 #define __ARCH_WANT_COMPAT_SYS_SENDFILE
 
 #ifdef CONFIG_64BIT