Merge branch 'parisc-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc updates from Helge Deller:
 "The major change in this patchset is the new system call table
  generation support from Firoz Khan"

* 'parisc-4.21-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: syscalls: ignore nfsservctl for other architectures
  parisc: generate uapi header and system call table files
  parisc: add system call table generation support
  parisc: remove __NR_Linux from uapi header file.
  parisc: add __NR_syscalls along with __NR_Linux_syscalls
  parisc: move __IGNORE* entries to non uapi header
  parisc: Fix HP SDC hpa address output
  parisc: Fix serio address output
  parisc: Split out alternative live patching code

arch/parisc/Makefile

@@ -163,3 +163,6 @@ define archhelp
 	@echo  '		  copy to $$(INSTALL_PATH)'
 	@echo  '  zinstall	- Install compressed vmlinuz kernel'
 endef
+
+archheaders:
+	$(Q)$(MAKE) $(build)=arch/parisc/kernel/syscalls all

arch/parisc/include/asm/Kbuild

+generated-y += syscall_table_32.h
+generated-y += syscall_table_64.h
+generated-y += syscall_table_c32.h
 generic-y += barrier.h
 generic-y += current.h
 generic-y += device.h

arch/parisc/include/asm/alternative.h

@@ -2,6 +2,7 @@
 #ifndef __ASM_PARISC_ALTERNATIVE_H
 #define __ASM_PARISC_ALTERNATIVE_H
 
+#define ALT_COND_ALWAYS		0x80	/* always replace instruction */
 #define ALT_COND_NO_SMP		0x01	/* when running UP instead of SMP */
 #define ALT_COND_NO_DCACHE	0x02	/* if system has no d-cache  */
 #define ALT_COND_NO_ICACHE	0x04	/* if system has no i-cache  */
@@ -26,6 +27,9 @@ struct alt_instr {
 };
 
 void set_kernel_text_rw(int enable_read_write);
+void apply_alternatives_all(void);
+void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
+	const char *module_name);
 
 /* Alternative SMP implementation. */
 #define ALTERNATIVE(cond, replacement)		"!0:"	\

arch/parisc/include/asm/unistd.h

@@ -4,10 +4,18 @@
 
 #include <uapi/asm/unistd.h>
 
+#define __NR_Linux_syscalls	__NR_syscalls
+
 #ifndef __ASSEMBLY__
 
 #define SYS_ify(syscall_name)   __NR_##syscall_name
 
+#define __IGNORE_select			/* newselect */
+#define __IGNORE_fadvise64		/* fadvise64_64 */
+#define __IGNORE_pkey_mprotect
+#define __IGNORE_pkey_alloc
+#define __IGNORE_pkey_free
+
 #ifndef ASM_LINE_SEP
 # define ASM_LINE_SEP ;
 #endif

arch/parisc/include/uapi/asm/Kbuild

 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generated-y += unistd_32.h
+generated-y += unistd_64.h
 generic-y += auxvec.h
 generic-y += bpf_perf_event.h
 generic-y += kvm_para.h

arch/parisc/kernel/Makefile

@@ -7,7 +7,7 @@ extra-y			:= head.o vmlinux.lds
 
 obj-y	     	:= cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \
 		   pa7300lc.o syscall.o entry.o sys_parisc.o firmware.o \
-		   ptrace.o hardware.o inventory.o drivers.o \
+		   ptrace.o hardware.o inventory.o drivers.o alternative.o \
 		   signal.o hpmc.o real2.o parisc_ksyms.o unaligned.o \
 		   process.o processor.o pdc_cons.o pdc_chassis.o unwind.o
 

arch/parisc/kernel/alternative.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ *    Alternative live-patching for parisc.
+ *    Copyright (C) 2018 Helge Deller <deller@gmx.de>
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/alternative.h>
+
+#include <linux/module.h>
+
+static int no_alternatives;
+static int __init setup_no_alternatives(char *str)
+{
+	no_alternatives = 1;
+	return 1;
+}
+__setup("no-alternatives", setup_no_alternatives);
+
+void __init_or_module apply_alternatives(struct alt_instr *start,
+		 struct alt_instr *end, const char *module_name)
+{
+	struct alt_instr *entry;
+	int index = 0, applied = 0;
+	int num_cpus = num_online_cpus();
+
+	for (entry = start; entry < end; entry++, index++) {
+
+		u32 *from, len, cond, replacement;
+
+		from = (u32 *)((ulong)&entry->orig_offset + entry->orig_offset);
+		len = entry->len;
+		cond = entry->cond;
+		replacement = entry->replacement;
+
+		WARN_ON(!cond);
+
+		if (cond != ALT_COND_ALWAYS && no_alternatives)
+			continue;
+
+		pr_debug("Check %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
+			index, cond, len, from, replacement);
+
+		if ((cond & ALT_COND_NO_SMP) && (num_cpus != 1))
+			continue;
+		if ((cond & ALT_COND_NO_DCACHE) && (cache_info.dc_size != 0))
+			continue;
+		if ((cond & ALT_COND_NO_ICACHE) && (cache_info.ic_size != 0))
+			continue;
+
+		/*
+		 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit
+		 * set (bit #61, big endian), we have to flush and sync every
+		 * time IO-PDIR is changed in Ike/Astro.
+		 */
+		if ((cond & ALT_COND_NO_IOC_FDC) &&
+			(boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC))
+			continue;
+
+		/* Want to replace pdtlb by a pdtlb,l instruction? */
+		if (replacement == INSN_PxTLB) {
+			replacement = *from;
+			if (boot_cpu_data.cpu_type >= pcxu) /* >= pa2.0 ? */
+				replacement |= (1 << 10); /* set el bit */
+		}
+
+		/*
+		 * Replace instruction with NOPs?
+		 * For long distance insert a branch instruction instead.
+		 */
+		if (replacement == INSN_NOP && len > 1)
+			replacement = 0xe8000002 + (len-2)*8; /* "b,n .+8" */
+
+		pr_debug("Do    %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
+			index, cond, len, from, replacement);
+
+		/* Replace instruction */
+		*from = replacement;
+		applied++;
+	}
+
+	pr_info("%s%salternatives: applied %d out of %d patches\n",
+		module_name ? : "", module_name ? " " : "",
+		applied, index);
+}
+
+
+void __init apply_alternatives_all(void)
+{
+	set_kernel_text_rw(1);
+
+	apply_alternatives((struct alt_instr *) &__alt_instructions,
+		(struct alt_instr *) &__alt_instructions_end, NULL);
+
+	set_kernel_text_rw(0);
+}

arch/parisc/kernel/module.c

@@ -877,6 +877,8 @@ int module_finalize(const Elf_Ehdr *hdr,
 	int i;
 	unsigned long nsyms;
 	const char *strtab = NULL;
+	const Elf_Shdr *s;
+	char *secstrings;
 	Elf_Sym *newptr, *oldptr;
 	Elf_Shdr *symhdr = NULL;
 #ifdef DEBUG
@@ -948,6 +950,18 @@ int module_finalize(const Elf_Ehdr *hdr,
 	nsyms = newptr - (Elf_Sym *)symhdr->sh_addr;
 	DEBUGP("NEW num_symtab %lu\n", nsyms);
 	symhdr->sh_size = nsyms * sizeof(Elf_Sym);
+
+	/* find .altinstructions section */
+	secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+	for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
+		void *aseg = (void *) s->sh_addr;
+		char *secname = secstrings + s->sh_name;
+
+		if (!strcmp(".altinstructions", secname))
+			/* patch .altinstructions */
+			apply_alternatives(aseg, aseg + s->sh_size, me->name);
+	}
+
 	return 0;
 }
 

arch/parisc/kernel/setup.c

@@ -305,86 +305,6 @@ static int __init parisc_init_resources(void)
 	return 0;
 }
 
-static int no_alternatives __initdata;
-static int __init setup_no_alternatives(char *str)
-{
-	no_alternatives = 1;
-	return 1;
-}
-__setup("no-alternatives", setup_no_alternatives);
-
-static void __init apply_alternatives_all(void)
-{
-	struct alt_instr *entry;
-	int index = 0, applied = 0;
-
-
-	pr_info("alternatives: %spatching kernel code\n",
-		no_alternatives ? "NOT " : "");
-	if (no_alternatives)
-		return;
-
-	set_kernel_text_rw(1);
-
-	for (entry = (struct alt_instr *) &__alt_instructions;
-		entry < (struct alt_instr *) &__alt_instructions_end;
-		entry++, index++) {
-
-		u32 *from, len, cond, replacement;
-
-		from = (u32 *)((ulong)&entry->orig_offset + entry->orig_offset);
-		len = entry->len;
-		cond = entry->cond;
-		replacement = entry->replacement;
-
-		WARN_ON(!cond);
-		pr_debug("Check %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
-			index, cond, len, from, replacement);
-
-		if ((cond & ALT_COND_NO_SMP) && (num_online_cpus() != 1))
-			continue;
-		if ((cond & ALT_COND_NO_DCACHE) && (cache_info.dc_size != 0))
-			continue;
-		if ((cond & ALT_COND_NO_ICACHE) && (cache_info.ic_size != 0))
-			continue;
-
-		/*
-		 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit
-		 * set (bit #61, big endian), we have to flush and sync every
-		 * time IO-PDIR is changed in Ike/Astro.
-		 */
-		if ((cond & ALT_COND_NO_IOC_FDC) &&
-			(boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC))
-			continue;
-
-		/* Want to replace pdtlb by a pdtlb,l instruction? */
-		if (replacement == INSN_PxTLB) {
-			replacement = *from;
-			if (boot_cpu_data.cpu_type >= pcxu) /* >= pa2.0 ? */
-				replacement |= (1 << 10); /* set el bit */
-		}
-
-		/*
-		 * Replace instruction with NOPs?
-		 * For long distance insert a branch instruction instead.
-		 */
-		if (replacement == INSN_NOP && len > 1)
-			replacement = 0xe8000002 + (len-2)*8; /* "b,n .+8" */
-
-		pr_debug("Do    %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
-			index, cond, len, from, replacement);
-
-		/* Replace instruction */
-		*from = replacement;
-		applied++;
-	}
-
-	pr_info("alternatives: applied %d out of %d patches\n", applied, index);
-
-	set_kernel_text_rw(0);
-}
-
-
 extern void gsc_init(void);
 extern void processor_init(void);
 extern void ccio_init(void);

arch/parisc/kernel/syscall.S

@@ -923,19 +923,24 @@ ENTRY(lws_table)
 END(lws_table)
 	/* End of lws table */
 
+#define __SYSCALL(nr, entry, nargs) ASM_ULONG_INSN entry
 	.align 8
 ENTRY(sys_call_table)
 	.export sys_call_table,data
-#include "syscall_table.S"
+#ifdef CONFIG_64BIT
+#include <asm/syscall_table_c32.h>   /* Compat syscalls */
+#else
+#include <asm/syscall_table_32.h>    /* 32-bit native syscalls */
+#endif
 END(sys_call_table)
 
 #ifdef CONFIG_64BIT
 	.align 8
 ENTRY(sys_call_table64)
-#define SYSCALL_TABLE_64BIT
-#include "syscall_table.S"
+#include <asm/syscall_table_64.h>    /* 64-bit native syscalls */
 END(sys_call_table64)
 #endif
+#undef __SYSCALL
 
 	/*
 		All light-weight-syscall atomic operations 

arch/parisc/kernel/syscalls/Makefile

+# SPDX-License-Identifier: GPL-2.0
+kapi := arch/$(SRCARCH)/include/generated/asm
+uapi := arch/$(SRCARCH)/include/generated/uapi/asm
+
+_dummy := $(shell [ -d '$(uapi)' ] || mkdir -p '$(uapi)')	\
+	  $(shell [ -d '$(kapi)' ] || mkdir -p '$(kapi)')
+
+syscall := $(srctree)/$(src)/syscall.tbl
+syshdr := $(srctree)/$(src)/syscallhdr.sh
+systbl := $(srctree)/$(src)/syscalltbl.sh
+
+quiet_cmd_syshdr = SYSHDR  $@
+      cmd_syshdr = $(CONFIG_SHELL) '$(syshdr)' '$<' '$@'	\
+		   '$(syshdr_abis_$(basetarget))'		\
+		   '$(syshdr_pfx_$(basetarget))'		\
+		   '$(syshdr_offset_$(basetarget))'
+
+quiet_cmd_systbl = SYSTBL  $@
+      cmd_systbl = $(CONFIG_SHELL) '$(systbl)' '$<' '$@'	\
+		   '$(systbl_abis_$(basetarget))'		\
+		   '$(systbl_abi_$(basetarget))'		\
+		   '$(systbl_offset_$(basetarget))'
+
+syshdr_abis_unistd_32 := common,32
+$(uapi)/unistd_32.h: $(syscall) $(syshdr)
+	$(call if_changed,syshdr)
+
+syshdr_abis_unistd_64 := common,64
+$(uapi)/unistd_64.h: $(syscall) $(syshdr)
+	$(call if_changed,syshdr)
+
+systbl_abis_syscall_table_32 := common,32
+$(kapi)/syscall_table_32.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+systbl_abis_syscall_table_64 := common,64
+$(kapi)/syscall_table_64.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+systbl_abis_syscall_table_c32 := common,32
+systbl_abi_syscall_table_c32 := c32
+$(kapi)/syscall_table_c32.h: $(syscall) $(systbl)
+	$(call if_changed,systbl)
+
+uapisyshdr-y		+= unistd_32.h unistd_64.h
+kapisyshdr-y		+= syscall_table_32.h		\
+			   syscall_table_64.h		\
+			   syscall_table_c32.h
+
+targets	+= $(uapisyshdr-y) $(kapisyshdr-y)
+
+PHONY += all
+all: $(addprefix $(uapi)/,$(uapisyshdr-y))
+all: $(addprefix $(kapi)/,$(kapisyshdr-y))
+	@:

arch/parisc/kernel/syscalls/syscallhdr.sh

+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+prefix="$4"
+offset="$5"
+
+fileguard=_UAPI_ASM_PARISC_`basename "$out" | sed \
+	-e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' \
+	-e 's/[^A-Z0-9_]/_/g' -e 's/__/_/g'`
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+	printf "#ifndef %s\n" "${fileguard}"
+	printf "#define %s\n" "${fileguard}"
+	printf "\n"
+
+	nxt=0
+	while read nr abi name entry compat ; do
+		if [ -z "$offset" ]; then
+			printf "#define __NR_%s%s\t%s\n" \
+				"${prefix}" "${name}" "${nr}"
+		else
+			printf "#define __NR_%s%s\t(%s + %s)\n" \
+				"${prefix}" "${name}" "${offset}" "${nr}"
+		fi
+		nxt=$((nr+1))
+	done
+
+	printf "\n"
+	printf "#ifdef __KERNEL__\n"
+	printf "#define __NR_syscalls\t%s\n" "${nxt}"
+	printf "#endif\n"
+	printf "\n"
+	printf "#endif /* %s */" "${fileguard}"
+) > "$out"

arch/parisc/kernel/syscalls/syscalltbl.sh

+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+
+in="$1"
+out="$2"
+my_abis=`echo "($3)" | tr ',' '|'`
+my_abi="$4"
+offset="$5"
+
+emit() {
+	t_nxt="$1"
+	t_nr="$2"
+	t_entry="$3"
+
+	while [ $t_nxt -lt $t_nr ]; do
+		printf "__SYSCALL(%s, sys_ni_syscall, )\n" "${t_nxt}"
+		t_nxt=$((t_nxt+1))
+	done
+	printf "__SYSCALL(%s, %s, )\n" "${t_nxt}" "${t_entry}"
+}
+
+grep -E "^[0-9A-Fa-fXx]+[[:space:]]+${my_abis}" "$in" | sort -n | (
+	nxt=0
+	if [ -z "$offset" ]; then
+		offset=0
+	fi
+
+	while read nr abi name entry compat ; do
+		if [ "$my_abi" = "c32" ] && [ ! -z "$compat" ]; then
+			emit $((nxt+offset)) $((nr+offset)) $compat
+		else
+			emit $((nxt+offset)) $((nr+offset)) $entry
+		fi
+		nxt=$((nr+1))
+	done
+) > "$out"

drivers/input/serio/gscps2.c

@@ -381,9 +381,9 @@ static int __init gscps2_probe(struct parisc_device *dev)
 		goto fail;
 #endif
 
-	printk(KERN_INFO "serio: %s port at 0x%p irq %d @ %s\n",
+	pr_info("serio: %s port at 0x%08lx irq %d @ %s\n",
 		ps2port->port->name,
-		ps2port->addr,
+		hpa,
 		ps2port->padev->irq,
 		ps2port->port->phys);
 

drivers/input/serio/hp_sdc.c

@@ -884,8 +884,8 @@ static int __init hp_sdc_init(void)
 			"HP SDC NMI", &hp_sdc))
 		goto err2;
 
-	printk(KERN_INFO PREFIX "HP SDC at 0x%p, IRQ %d (NMI IRQ %d)\n",
-	       (void *)hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi);
+	pr_info(PREFIX "HP SDC at 0x%08lx, IRQ %d (NMI IRQ %d)\n",
+	       hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi);
 
 	hp_sdc_status_in8();
 	hp_sdc_data_in8();

scripts/checksyscalls.sh

@@ -150,6 +150,7 @@ cat << EOF
 #define __IGNORE_uselib
 #define __IGNORE__sysctl
 #define __IGNORE_arch_prctl
+#define __IGNORE_nfsservctl
 
 /* ... including the "new" 32-bit uid syscalls */
 #define __IGNORE_lchown32