Merge tag 'parisc-for-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:
 "PA-RISC now has a native eBPF JIT compiler for 32- and 64-bit kernels,
  the LED driver was rewritten to use the Linux LED framework and most
  of the parisc bootup code was switched to use *_initcall() functions.

  Summary:

   - add eBPF JIT compiler for 32- and 64-bit kernel

   - LCD/LED driver rewrite to utilize Linux LED subsystem

   - switch to generic mmap top-down layout and brk randomization

   - kernel startup cleanup by loading most drivers via arch_initcall()"

* tag 'parisc-for-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: (31 commits)
  parisc: ccio-dma: Create private runway procfs root entry
  parisc: chassis: Do not overwrite string on LCD display
  parisc: led: Rewrite LED/LCD driver to utilizize Linux LED subsystem
  parisc: led: Fix LAN receive and transmit LEDs
  parisc: lasi: Initialize LASI driver via arch_initcall()
  parisc: asp: Initialize asp driver via arch_initcall()
  parisc: wax: Initialize wax driver via arch_initcall()
  parisc: iosapic: Convert I/O Sapic driver to use arch_initcall()
  parisc: sba_iommu: Convert SBA IOMMU driver to use arch_initcall()
  parisc: led: Move register_led_regions() to late_initcall()
  parisc: lba: Convert LBA PCI bus driver to use arch_initcall()
  parisc: gsc: Convert GSC bus driver to use arch_initcall()
  parisc: ccio: Convert CCIO driver to use arch_initcall()
  parisc: eisa: Convert HP EISA bus driver to use arch_initcall()
  parisc: hppb: Convert HP PB bus driver to use arch_initcall()
  parisc: dino: Convert dino PCI bus driver to use arch_initcall()
  parisc: Makefile: Adjust order in which drivers should be loaded
  parisc: led: Reduce CPU overhead for disk & lan LED computation
  parisc: Avoid ioremap() for same addresss in iosapic_register()
  parisc: unaligned: Simplify 32-bit assembly in emulate_std()
  ...

arch/parisc/Kbuild

 # SPDX-License-Identifier: GPL-2.0-only
-obj-y	+= mm/ kernel/ math-emu/
+obj-y	+= mm/ kernel/ math-emu/ net/
 
 # for cleaning
 subdir- += boot

arch/parisc/Kconfig

@@ -49,6 +49,9 @@ config PARISC
 	select TTY # Needed for pdc_cons.c
 	select HAS_IOPORT if PCI || EISA
 	select HAVE_DEBUG_STACKOVERFLOW
+	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+	select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
+	select HAVE_ARCH_MMAP_RND_BITS
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_HASH
 	select HAVE_ARCH_JUMP_LABEL
@@ -56,6 +59,8 @@ config PARISC
 	select HAVE_ARCH_KFENCE
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
+	select HAVE_EBPF_JIT
+	select ARCH_WANT_DEFAULT_BPF_JIT
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
 	select GENERIC_SCHED_CLOCK
@@ -124,6 +129,20 @@ config TIME_LOW_RES
 	depends on SMP
 	default y
 
+config ARCH_MMAP_RND_BITS_MIN
+	default 18 if 64BIT
+	default 8
+
+config ARCH_MMAP_RND_COMPAT_BITS_MIN
+	default 8
+
+config ARCH_MMAP_RND_BITS_MAX
+	default 24 if 64BIT
+	default 17
+
+config ARCH_MMAP_RND_COMPAT_BITS_MAX
+	default 17
+
 # unless you want to implement ACPI on PA-RISC ... ;-)
 config PM
 	bool

arch/parisc/Kconfig.debug

@@ -13,7 +13,7 @@ config LIGHTWEIGHT_SPINLOCK_CHECK
 
 config TLB_PTLOCK
 	bool "Use page table locks in TLB fault handler"
-	depends on SMP
+	depends on DEBUG_KERNEL && SMP
 	default n
 	help
 	  Select this option to enable page table locking in the TLB

arch/parisc/include/asm/elf.h

@@ -163,8 +163,7 @@ typedef struct elf32_fdesc {
 
 /* Format for the Elf64 Function descriptor */
 typedef struct elf64_fdesc {
-	__u64	dummy[2]; /* FIXME: nothing uses these, why waste
-			   * the space */
+	__u64	dummy[2]; /* used by 64-bit eBPF and tracing functions */
 	__u64	addr;
 	__u64	gp;
 } Elf64_Fdesc;

arch/parisc/include/asm/led.h

@@ -11,8 +11,8 @@
 #define	LED1		0x02
 #define	LED0		0x01		/* bottom (or furthest left) LED */
 
-#define	LED_LAN_TX	LED0		/* for LAN transmit activity */
-#define	LED_LAN_RCV	LED1		/* for LAN receive activity */
+#define	LED_LAN_RCV	LED0		/* for LAN receive activity */
+#define	LED_LAN_TX	LED1		/* for LAN transmit activity */
 #define	LED_DISK_IO	LED2		/* for disk activity */
 #define	LED_HEARTBEAT	LED3		/* heartbeat */
 
@@ -25,19 +25,13 @@
 #define LED_CMD_REG_NONE 0		/* NULL == no addr for the cmd register */
 
 /* register_led_driver() */
-int __init register_led_driver(int model, unsigned long cmd_reg, unsigned long data_reg);
-
-/* registers the LED regions for procfs */
-void __init register_led_regions(void);
+int register_led_driver(int model, unsigned long cmd_reg, unsigned long data_reg);
 
 #ifdef CONFIG_CHASSIS_LCD_LED
 /* writes a string to the LCD display (if possible on this h/w) */
-int lcd_print(const char *str);
+void lcd_print(const char *str);
 #else
-#define lcd_print(str)
+#define lcd_print(str) do { } while (0)
 #endif
 
-/* main LED initialization function (uses PDC) */ 
-int __init led_init(void);
-
 #endif /* LED_H */

arch/parisc/include/asm/machdep.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _PARISC_MACHDEP_H
-#define _PARISC_MACHDEP_H
-
-#include <linux/notifier.h>
-
-#define	MACH_RESTART	1
-#define	MACH_HALT	2
-#define MACH_POWER_ON	3
-#define	MACH_POWER_OFF	4
-
-extern struct notifier_block *mach_notifier;
-extern void pa7300lc_init(void);
-
-extern void (*cpu_lpmc)(int, struct pt_regs *);
-
-#endif

arch/parisc/include/asm/processor.h

@@ -313,15 +313,7 @@ extern void collect_boot_cpu_data(void);
 extern int show_cpuinfo (struct seq_file *m, void *v);
 
 /* driver code in driver/parisc */
-extern void gsc_init(void);
 extern void processor_init(void);
-extern void ccio_init(void);
-extern void hppb_init(void);
-extern void dino_init(void);
-extern void iosapic_init(void);
-extern void lba_init(void);
-extern void sba_init(void);
-extern void parisc_eisa_init(void);
 struct parisc_device;
 struct resource;
 extern void sba_distributed_lmmio(struct parisc_device *, struct resource *);

arch/parisc/include/asm/ropes.h

@@ -252,7 +252,7 @@ static inline int agp_mode_mercury(void __iomem *hpa) {
 ** fixup_irq is to initialize PCI IRQ line support and
 ** virtualize pcidev->irq value. To be called by pci_fixup_bus().
 */
-extern void *iosapic_register(unsigned long hpa);
+extern void *iosapic_register(unsigned long hpa, void __iomem *vaddr);
 extern int iosapic_fixup_irq(void *obj, struct pci_dev *pcidev);
 
 #define LBA_FUNC_ID	0x0000	/* function id */

arch/parisc/include/asm/runway.h

@@ -2,9 +2,6 @@
 #ifndef ASM_PARISC_RUNWAY_H
 #define ASM_PARISC_RUNWAY_H
 
-/* declared in arch/parisc/kernel/setup.c */
-extern struct proc_dir_entry * proc_runway_root;
-
 #define RUNWAY_STATUS	0x10
 #define RUNWAY_DEBUG	0x40
 

arch/parisc/kernel/Makefile

@@ -6,7 +6,7 @@
 extra-y		:= vmlinux.lds
 
 obj-y		:= head.o 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 \
+		   syscall.o entry.o sys_parisc.o firmware.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/pa7300lc.c

-// SPDX-License-Identifier: GPL-2.0
-/*
- *   linux/arch/parisc/kernel/pa7300lc.c
- *	- PA7300LC-specific functions	
- *
- *   Copyright (C) 2000 Philipp Rumpf */
-
-#include <linux/sched.h>
-#include <linux/sched/debug.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <asm/io.h>
-#include <asm/ptrace.h>
-#include <asm/machdep.h>
-
-/* CPU register indices */
-
-#define MIOC_STATUS	0xf040
-#define MIOC_CONTROL	0xf080
-#define MDERRADD	0xf0e0
-#define DMAERR		0xf0e8
-#define DIOERR		0xf0ec
-#define HIDMAMEM	0xf0f4
-
-/* this returns the HPA of the CPU it was called on */
-static u32 cpu_hpa(void)
-{
-	return 0xfffb0000;
-}
-
-static void pa7300lc_lpmc(int code, struct pt_regs *regs)
-{
-	u32 hpa;
-	printk(KERN_WARNING "LPMC on CPU %d\n", smp_processor_id());
-
-	show_regs(regs);
-
-	hpa = cpu_hpa();
-	printk(KERN_WARNING
-		"MIOC_CONTROL %08x\n" "MIOC_STATUS  %08x\n"
-		"MDERRADD     %08x\n" "DMAERR       %08x\n"
-		"DIOERR       %08x\n" "HIDMAMEM     %08x\n",
-		gsc_readl(hpa+MIOC_CONTROL), gsc_readl(hpa+MIOC_STATUS),
-		gsc_readl(hpa+MDERRADD), gsc_readl(hpa+DMAERR),
-		gsc_readl(hpa+DIOERR), gsc_readl(hpa+HIDMAMEM));
-}
-
-void pa7300lc_init(void)
-{
-	cpu_lpmc = pa7300lc_lpmc;
-}

arch/parisc/kernel/pdc_chassis.c

@@ -31,6 +31,7 @@
 #include <asm/processor.h>
 #include <asm/pdc.h>
 #include <asm/pdcpat.h>
+#include <asm/led.h>
 
 #define PDC_CHASSIS_VER	"0.05"
 
@@ -234,6 +235,11 @@ int pdc_chassis_send_status(int message)
 		} else retval = -1;
 #endif /* CONFIG_64BIT */
 	}	/* if (pdc_chassis_enabled) */
+
+	/* if system has LCD display, update current string */
+	if (retval != -1 && IS_ENABLED(CONFIG_CHASSIS_LCD_LED))
+		lcd_print(NULL);
+
 #endif /* CONFIG_PDC_CHASSIS */
 	return retval;
 }

arch/parisc/kernel/process.c

@@ -97,18 +97,12 @@ void machine_restart(char *cmd)
 
 }
 
-void (*chassis_power_off)(void);
-
 /*
  * This routine is called from sys_reboot to actually turn off the
  * machine 
  */
 void machine_power_off(void)
 {
-	/* If there is a registered power off handler, call it. */
-	if (chassis_power_off)
-		chassis_power_off();
-
 	/* Put the soft power button back under hardware control.
 	 * If the user had already pressed the power button, the
 	 * following call will immediately power off. */
@@ -284,17 +278,3 @@ __get_wchan(struct task_struct *p)
 	} while (count++ < MAX_UNWIND_ENTRIES);
 	return 0;
 }
-
-static inline unsigned long brk_rnd(void)
-{
-	return (get_random_u32() & BRK_RND_MASK) << PAGE_SHIFT;
-}
-
-unsigned long arch_randomize_brk(struct mm_struct *mm)
-{
-	unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd());
-
-	if (ret < mm->brk)
-		return mm->brk;
-	return ret;
-}

arch/parisc/kernel/processor.c

@@ -378,10 +378,18 @@ int
 show_cpuinfo (struct seq_file *m, void *v)
 {
 	unsigned long cpu;
+	char cpu_name[60], *p;
+
+	/* strip PA path from CPU name to not confuse lscpu */
+	strlcpy(cpu_name, per_cpu(cpu_data, 0).dev->name, sizeof(cpu_name));
+	p = strrchr(cpu_name, '[');
+	if (p)
+		*(--p) = 0;
 
 	for_each_online_cpu(cpu) {
-		const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
 #ifdef CONFIG_SMP
+		const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
+
 		if (0 == cpuinfo->hpa)
 			continue;
 #endif
@@ -426,8 +434,7 @@ show_cpuinfo (struct seq_file *m, void *v)
 
 		seq_printf(m, "model\t\t: %s - %s\n",
 				 boot_cpu_data.pdc.sys_model_name,
-				 cpuinfo->dev ?
-				 cpuinfo->dev->name : "Unknown");
+				 cpu_name);
 
 		seq_printf(m, "hversion\t: 0x%08x\n"
 			        "sversion\t: 0x%08x\n",

arch/parisc/kernel/setup.c

@@ -31,7 +31,6 @@
 #include <asm/sections.h>
 #include <asm/pdc.h>
 #include <asm/led.h>
-#include <asm/machdep.h>	/* for pa7300lc_init() proto */
 #include <asm/pdc_chassis.h>
 #include <asm/io.h>
 #include <asm/setup.h>
@@ -93,8 +92,6 @@ static void __init dma_ops_init(void)
 			"the PA-RISC 1.1 or 2.0 architecture specification.\n");
 
 	case pcxl2:
-		pa7300lc_init();
-		break;
 	default:
 		break;
 	}
@@ -146,11 +143,6 @@ void __init setup_arch(char **cmdline_p)
 	parisc_cache_init();
 	paging_init();
 
-#ifdef CONFIG_CHASSIS_LCD_LED
-	/* initialize the LCD/LED after boot_cpu_data is available ! */
-	led_init();		/* LCD/LED initialization */
-#endif
-
 #ifdef CONFIG_PA11
 	dma_ops_init();
 #endif
@@ -281,47 +273,6 @@ static int __init parisc_init(void)
 
 	apply_alternatives_all();
 	parisc_setup_cache_timing();
-
-	/* These are in a non-obvious order, will fix when we have an iotree */
-#if defined(CONFIG_IOSAPIC)
-	iosapic_init();
-#endif
-#if defined(CONFIG_IOMMU_SBA)
-	sba_init();
-#endif
-#if defined(CONFIG_PCI_LBA)
-	lba_init();
-#endif
-
-	/* CCIO before any potential subdevices */
-#if defined(CONFIG_IOMMU_CCIO)
-	ccio_init();
-#endif
-
-	/*
-	 * Need to register Asp & Wax before the EISA adapters for the IRQ
-	 * regions.  EISA must come before PCI to be sure it gets IRQ region
-	 * 0.
-	 */
-#if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
-	gsc_init();
-#endif
-#ifdef CONFIG_EISA
-	parisc_eisa_init();
-#endif
-
-#if defined(CONFIG_HPPB)
-	hppb_init();
-#endif
-
-#if defined(CONFIG_GSC_DINO)
-	dino_init();
-#endif
-
-#ifdef CONFIG_CHASSIS_LCD_LED
-	register_led_regions();	/* register LED port info in procfs */
-#endif
-
 	return 0;
 }
 arch_initcall(parisc_init);

arch/parisc/kernel/sys_parisc.c

@@ -161,7 +161,7 @@ static unsigned long arch_get_unmapped_area_common(struct file *filp,
 	}
 
 	info.flags = 0;
-	info.low_limit = mm->mmap_legacy_base;
+	info.low_limit = mm->mmap_base;
 	info.high_limit = mmap_upper_limit(NULL);
 	return vm_unmapped_area(&info);
 }
@@ -181,58 +181,6 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp,
 			addr, len, pgoff, flags, DOWN);
 }
 
-static int mmap_is_legacy(void)
-{
-	if (current->personality & ADDR_COMPAT_LAYOUT)
-		return 1;
-
-	/* parisc stack always grows up - so a unlimited stack should
-	 * not be an indicator to use the legacy memory layout.
-	 * if (rlimit(RLIMIT_STACK) == RLIM_INFINITY)
-	 *	return 1;
-	 */
-
-	return sysctl_legacy_va_layout;
-}
-
-static unsigned long mmap_rnd(void)
-{
-	unsigned long rnd = 0;
-
-	if (current->flags & PF_RANDOMIZE)
-		rnd = get_random_u32() & MMAP_RND_MASK;
-
-	return rnd << PAGE_SHIFT;
-}
-
-unsigned long arch_mmap_rnd(void)
-{
-	return (get_random_u32() & MMAP_RND_MASK) << PAGE_SHIFT;
-}
-
-static unsigned long mmap_legacy_base(void)
-{
-	return TASK_UNMAPPED_BASE + mmap_rnd();
-}
-
-/*
- * This function, called very early during the creation of a new
- * process VM image, sets up which VM layout function to use:
- */
-void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)
-{
-	mm->mmap_legacy_base = mmap_legacy_base();
-	mm->mmap_base = mmap_upper_limit(rlim_stack);
-
-	if (mmap_is_legacy()) {
-		mm->mmap_base = mm->mmap_legacy_base;
-		mm->get_unmapped_area = arch_get_unmapped_area;
-	} else {
-		mm->get_unmapped_area = arch_get_unmapped_area_topdown;
-	}
-}
-
-
 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
 	unsigned long prot, unsigned long flags, unsigned long fd,
 	unsigned long pgoff)

arch/parisc/kernel/traps.c

@@ -335,9 +335,6 @@ static void default_trap(int code, struct pt_regs *regs)
 	show_regs(regs);
 }
 
-void (*cpu_lpmc) (int code, struct pt_regs *regs) __read_mostly = default_trap;
-
-
 static void transfer_pim_to_trap_frame(struct pt_regs *regs)
 {
     register int i;
@@ -557,7 +554,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 		
 		flush_cache_all();
 		flush_tlb_all();
-		cpu_lpmc(5, regs);
+		default_trap(code, regs);
 		return;
 
 	case  PARISC_ITLB_TRAP:

arch/parisc/kernel/unaligned.c

@@ -338,25 +338,24 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
 	: "r19", "r20", "r21", "r22", "r1" );
 #else
     {
-	unsigned long valh = (val >> 32), vall = (val & 0xffffffffl);
 	__asm__ __volatile__ (
-"	mtsp	%4, %%sr1\n"
-"	zdep	%2, 29, 2, %%r19\n"
-"	dep	%%r0, 31, 2, %3\n"
+"	mtsp	%3, %%sr1\n"
+"	zdep	%R1, 29, 2, %%r19\n"
+"	dep	%%r0, 31, 2, %2\n"
 "	mtsar	%%r19\n"
 "	zvdepi	-2, 32, %%r19\n"
-"1:	ldw	0(%%sr1,%3),%%r20\n"
-"2:	ldw	8(%%sr1,%3),%%r21\n"
-"	vshd	%1, %2, %%r1\n"
+"1:	ldw	0(%%sr1,%2),%%r20\n"
+"2:	ldw	8(%%sr1,%2),%%r21\n"
+"	vshd	%1, %R1, %%r1\n"
 "	vshd	%%r0, %1, %1\n"
-"	vshd	%2, %%r0, %2\n"
+"	vshd	%R1, %%r0, %R1\n"
 "	and	%%r20, %%r19, %%r20\n"
 "	andcm	%%r21, %%r19, %%r21\n"
 "	or	%1, %%r20, %1\n"
-"	or	%2, %%r21, %2\n"
-"3:	stw	%1,0(%%sr1,%3)\n"
-"4:	stw	%%r1,4(%%sr1,%3)\n"
-"5:	stw	%2,8(%%sr1,%3)\n"
+"	or	%R1, %%r21, %R1\n"
+"3:	stw	%1,0(%%sr1,%2)\n"
+"4:	stw	%%r1,4(%%sr1,%2)\n"
+"5:	stw	%R1,8(%%sr1,%2)\n"
 "6:	\n"
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 6b)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 6b)
@@ -364,7 +363,7 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(4b, 6b)
 	ASM_EXCEPTIONTABLE_ENTRY_EFAULT(5b, 6b)
 	: "+r" (ret)
-	: "r" (valh), "r" (vall), "r" (regs->ior), "r" (regs->isr)
+	: "r" (val), "r" (regs->ior), "r" (regs->isr)
 	: "r19", "r20", "r21", "r1" );
     }
 #endif

arch/parisc/net/Makefile

+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_BPF_JIT) += bpf_jit_core.o
+
+ifeq ($(CONFIG_64BIT),y)
+	obj-$(CONFIG_BPF_JIT) += bpf_jit_comp64.o
+else
+	obj-$(CONFIG_BPF_JIT) += bpf_jit_comp32.o
+endif

arch/parisc/net/bpf_jit_core.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Common functionality for HPPA32 and HPPA64 BPF JIT compilers
+ *
+ * Copyright (c) 2023 Helge Deller <deller@gmx.de>
+ *
+ */
+
+#include <linux/bpf.h>
+#include <linux/filter.h>
+#include "bpf_jit.h"
+
+/* Number of iterations to try until offsets converge. */
+#define NR_JIT_ITERATIONS	35
+
+static int build_body(struct hppa_jit_context *ctx, bool extra_pass, int *offset)
+{
+	const struct bpf_prog *prog = ctx->prog;
+	int i;
+
+	ctx->reg_seen_collect = true;
+	for (i = 0; i < prog->len; i++) {
+		const struct bpf_insn *insn = &prog->insnsi[i];
+		int ret;
+
+		ret = bpf_jit_emit_insn(insn, ctx, extra_pass);
+		/* BPF_LD | BPF_IMM | BPF_DW: skip the next instruction. */
+		if (ret > 0)
+			i++;
+		if (offset)
+			offset[i] = ctx->ninsns;
+		if (ret < 0)
+			return ret;
+	}
+	ctx->reg_seen_collect = false;
+	return 0;
+}
+
+bool bpf_jit_needs_zext(void)
+{
+	return true;
+}
+
+struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
+{
+	unsigned int prog_size = 0, extable_size = 0;
+	bool tmp_blinded = false, extra_pass = false;
+	struct bpf_prog *tmp, *orig_prog = prog;
+	int pass = 0, prev_ninsns = 0, prologue_len, i;
+	struct hppa_jit_data *jit_data;
+	struct hppa_jit_context *ctx;
+
+	if (!prog->jit_requested)
+		return orig_prog;
+
+	tmp = bpf_jit_blind_constants(prog);
+	if (IS_ERR(tmp))
+		return orig_prog;
+	if (tmp != prog) {
+		tmp_blinded = true;
+		prog = tmp;
+	}
+
+	jit_data = prog->aux->jit_data;
+	if (!jit_data) {
+		jit_data = kzalloc(sizeof(*jit_data), GFP_KERNEL);
+		if (!jit_data) {
+			prog = orig_prog;
+			goto out;
+		}
+		prog->aux->jit_data = jit_data;
+	}
+
+	ctx = &jit_data->ctx;
+
+	if (ctx->offset) {
+		extra_pass = true;
+		prog_size = sizeof(*ctx->insns) * ctx->ninsns;
+		goto skip_init_ctx;
+	}
+
+	ctx->prog = prog;
+	ctx->offset = kcalloc(prog->len, sizeof(int), GFP_KERNEL);
+	if (!ctx->offset) {
+		prog = orig_prog;
+		goto out_offset;
+	}
+	for (i = 0; i < prog->len; i++) {
+		prev_ninsns += 20;
+		ctx->offset[i] = prev_ninsns;
+	}
+
+	for (i = 0; i < NR_JIT_ITERATIONS; i++) {
+		pass++;
+		ctx->ninsns = 0;
+		if (build_body(ctx, extra_pass, ctx->offset)) {
+			prog = orig_prog;
+			goto out_offset;
+		}
+		ctx->body_len = ctx->ninsns;
+		bpf_jit_build_prologue(ctx);
+		ctx->prologue_len = ctx->ninsns - ctx->body_len;
+		ctx->epilogue_offset = ctx->ninsns;
+		bpf_jit_build_epilogue(ctx);
+
+		if (ctx->ninsns == prev_ninsns) {
+			if (jit_data->header)
+				break;
+			/* obtain the actual image size */
+			extable_size = prog->aux->num_exentries *
+				sizeof(struct exception_table_entry);
+			prog_size = sizeof(*ctx->insns) * ctx->ninsns;
+
+			jit_data->header =
+				bpf_jit_binary_alloc(prog_size + extable_size,
+						     &jit_data->image,
+						     sizeof(u32),
+						     bpf_fill_ill_insns);
+			if (!jit_data->header) {
+				prog = orig_prog;
+				goto out_offset;
+			}
+
+			ctx->insns = (u32 *)jit_data->image;
+			/*
+			 * Now, when the image is allocated, the image can
+			 * potentially shrink more (auipc/jalr -> jal).
+			 */
+		}
+		prev_ninsns = ctx->ninsns;
+	}
+
+	if (i == NR_JIT_ITERATIONS) {
+		pr_err("bpf-jit: image did not converge in <%d passes!\n", i);
+		if (jit_data->header)
+			bpf_jit_binary_free(jit_data->header);
+		prog = orig_prog;
+		goto out_offset;
+	}
+
+	if (extable_size)
+		prog->aux->extable = (void *)ctx->insns + prog_size;
+
+skip_init_ctx:
+	pass++;
+	ctx->ninsns = 0;
+
+	bpf_jit_build_prologue(ctx);
+	if (build_body(ctx, extra_pass, NULL)) {
+		bpf_jit_binary_free(jit_data->header);
+		prog = orig_prog;
+		goto out_offset;
+	}
+	bpf_jit_build_epilogue(ctx);
+
+	if (HPPA_JIT_DEBUG || bpf_jit_enable > 1) {
+		if (HPPA_JIT_DUMP)
+			bpf_jit_dump(prog->len, prog_size, pass, ctx->insns);
+		if (HPPA_JIT_REBOOT)
+			{ extern int machine_restart(char *); machine_restart(""); }
+	}
+
+	prog->bpf_func = (void *)ctx->insns;
+	prog->jited = 1;
+	prog->jited_len = prog_size;
+
+	bpf_flush_icache(jit_data->header, ctx->insns + ctx->ninsns);
+
+	if (!prog->is_func || extra_pass) {
+		bpf_jit_binary_lock_ro(jit_data->header);
+		prologue_len = ctx->epilogue_offset - ctx->body_len;
+		for (i = 0; i < prog->len; i++)
+			ctx->offset[i] += prologue_len;
+		bpf_prog_fill_jited_linfo(prog, ctx->offset);
+out_offset:
+		kfree(ctx->offset);
+		kfree(jit_data);
+		prog->aux->jit_data = NULL;
+	}
+out:
+	if (HPPA_JIT_REBOOT)
+		{ extern int machine_restart(char *); machine_restart(""); }
+
+	if (tmp_blinded)
+		bpf_jit_prog_release_other(prog, prog == orig_prog ?
+					   tmp : orig_prog);
+	return prog;
+}
+
+u64 hppa_div64(u64 div, u64 divisor)
+{
+	div = div64_u64(div, divisor);
+	return div;
+}
+
+u64 hppa_div64_rem(u64 div, u64 divisor)
+{
+	u64 rem;
+	div64_u64_rem(div, divisor, &rem);
+	return rem;
+}

drivers/parisc/Kconfig

@@ -100,8 +100,9 @@ config SUPERIO
 
 config CHASSIS_LCD_LED
 	bool "Chassis LCD and LED support"
+	depends on LEDS_CLASS=y
 	default y
-	select VM_EVENT_COUNTERS
+	select LEDS_TRIGGERS
 	help
 	  Say Y here if you want to enable support for the Heartbeat,
 	  Disk/Network activities LEDs on some PA-RISC machines,

drivers/parisc/Makefile

 # SPDX-License-Identifier: GPL-2.0
 #
-# Makefile for most of the non-PCI devices in PA-RISC machines
+# Makefile PCI and non-PCI devices in PA-RISC machines
+#
+# Keep the order below, e.g.
+# - ccio before any potential subdevices
+# - gsc is required before lasi and wax
+# - asp and wax before the EISA adapters for the IRQ regions
+# - EISA must come before PCI to be sure it gets IRQ region
 #
 
-# I/O SAPIC is also on IA64 platforms.
-# The two could be merged into a common source some day.
 obj-$(CONFIG_IOSAPIC)		+= iosapic.o
 obj-$(CONFIG_IOMMU_SBA)		+= sba_iommu.o
 obj-$(CONFIG_PCI_LBA)		+= lba_pci.o
 obj-$(CONFIG_IOMMU_CCIO)	+= ccio-dma.o
 
 obj-$(CONFIG_GSC)		+= gsc.o
-
-obj-$(CONFIG_HPPB)		+= hppb.o
-obj-$(CONFIG_GSC_DINO)		+= dino.o
 obj-$(CONFIG_GSC_LASI)		+= lasi.o asp.o
 obj-$(CONFIG_GSC_WAX)		+= wax.o
 obj-$(CONFIG_EISA)		+= eisa.o eisa_enumerator.o eisa_eeprom.o
+obj-$(CONFIG_HPPB)		+= hppb.o
+obj-$(CONFIG_GSC_DINO)		+= dino.o
 
 obj-$(CONFIG_SUPERIO)		+= superio.o
 obj-$(CONFIG_CHASSIS_LCD_LED)	+= led.o
 obj-$(CONFIG_PDC_STABLE)	+= pdc_stable.o
 obj-y				+= power.o
-

drivers/parisc/asp.c

@@ -4,7 +4,7 @@
  *
  *	(c) Copyright 2000 The Puffin Group Inc.
  *
- *	by Helge Deller <deller@gmx.de>
+ *	(c) 2000-2023 by Helge Deller <deller@gmx.de>
  */
 
 #include <linux/errno.h>
@@ -118,9 +118,16 @@ static const struct parisc_device_id asp_tbl[] __initconst = {
 	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
 	{ 0, }
 };
+MODULE_DEVICE_TABLE(parisc, asp_tbl);
 
-struct parisc_driver asp_driver __refdata = {
+static struct parisc_driver asp_driver __refdata = {
 	.name =		"asp",
 	.id_table =	asp_tbl,
 	.probe =	asp_init_chip,
 };
+
+static int __init asp_init(void)
+{
+	return register_parisc_driver(&asp_driver);
+}
+arch_initcall(asp_init);

drivers/parisc/ccio-dma.c

@@ -8,18 +8,10 @@
 **	(c) Copyright 2000 Ryan Bradetich
 **	(c) Copyright 2000 Hewlett-Packard Company
 **
-**
-**
 **  "Real Mode" operation refers to U2/Uturn chip operation.
 **  U2/Uturn were designed to perform coherency checks w/o using
 **  the I/O MMU - basically what x86 does.
 **
-**  Philipp Rumpf has a "Real Mode" driver for PCX-W machines at:
-**      CVSROOT=:pserver:anonymous@198.186.203.37:/cvsroot/linux-parisc
-**      cvs -z3 co linux/arch/parisc/kernel/dma-rm.c
-**
-**  I've rewritten his code to work under TPG's tree. See ccio-rm-dma.c.
-**
 **  Drawbacks of using Real Mode are:
 **	o outbound DMA is slower - U2 won't prefetch data (GSC+ XQL signal).
 **      o Inbound DMA less efficient - U2 can't use DMA_FAST attribute.
@@ -71,8 +63,6 @@
 #undef CCIO_COLLECT_STATS
 #endif
 
-#include <asm/runway.h>		/* for proc_runway_root */
-
 #ifdef DEBUG_CCIO_INIT
 #define DBG_INIT(x...)  printk(x)
 #else
@@ -1567,10 +1557,15 @@ static int __init ccio_probe(struct parisc_device *dev)
 
 #ifdef CONFIG_PROC_FS
 	if (ioc_count == 0) {
-		proc_create_single(MODULE_NAME, 0, proc_runway_root,
+		struct proc_dir_entry *runway;
+
+		runway = proc_mkdir("bus/runway", NULL);
+		if (runway) {
+			proc_create_single(MODULE_NAME, 0, runway,
 				ccio_proc_info);
-		proc_create_single(MODULE_NAME"-bitmap", 0, proc_runway_root,
+			proc_create_single(MODULE_NAME"-bitmap", 0, runway,
 				ccio_proc_bitmap_info);
+		}
 	}
 #endif
 	ioc_count++;
@@ -1582,8 +1577,8 @@ static int __init ccio_probe(struct parisc_device *dev)
  *
  * Register this driver.
  */
-void __init ccio_init(void)
+static int __init ccio_init(void)
 {
-	register_parisc_driver(&ccio_driver);
+	return register_parisc_driver(&ccio_driver);
 }
-
+arch_initcall(ccio_init);

drivers/parisc/dino.c

@@ -1084,8 +1084,8 @@ static struct parisc_driver dino_driver __refdata = {
  * This is the only routine which is NOT static.
  * Must be called exactly once before pci_init().
  */
-void __init dino_init(void)
+static int __init dino_init(void)
 {
-	register_parisc_driver(&dino_driver);
+	return register_parisc_driver(&dino_driver);
 }
-
+arch_initcall(dino_init);

drivers/parisc/eisa.c

@@ -400,10 +400,11 @@ static struct parisc_driver eisa_driver __refdata = {
 	.probe =	eisa_probe,
 };
 
-void __init parisc_eisa_init(void)
+static int __init parisc_eisa_init(void)
 {
-	register_parisc_driver(&eisa_driver);
+	return register_parisc_driver(&eisa_driver);
 }
+arch_initcall(parisc_eisa_init);
 
 
 static unsigned int eisa_irq_configured;

drivers/parisc/gsc.c

@@ -258,18 +258,3 @@ int gsc_common_setup(struct parisc_device *parent, struct gsc_asic *gsc_asic)
 
 	return 0;
 }
-
-extern struct parisc_driver lasi_driver;
-extern struct parisc_driver asp_driver;
-extern struct parisc_driver wax_driver;
-
-void __init gsc_init(void)
-{
-#ifdef CONFIG_GSC_LASI
-	register_parisc_driver(&lasi_driver);
-	register_parisc_driver(&asp_driver);
-#endif
-#ifdef CONFIG_GSC_WAX
-	register_parisc_driver(&wax_driver);
-#endif
-}

drivers/parisc/hppb.c

@@ -96,9 +96,10 @@ static struct parisc_driver hppb_driver __refdata = {
 /**
  * hppb_init - HP-PB bus initialization procedure.
  *
- * Register this driver.   
+ * Register this driver.
  */
-void __init hppb_init(void)
+static int __init hppb_init(void)
 {
-        register_parisc_driver(&hppb_driver);
+        return register_parisc_driver(&hppb_driver);
 }
+arch_initcall(hppb_init);

drivers/parisc/iosapic.c

@@ -348,13 +348,10 @@ iosapic_load_irt(unsigned long cell_num, struct irt_entry **irt)
 }
 
 
-
-void __init iosapic_init(void)
+static int __init iosapic_init(void)
 {
 	unsigned long cell = 0;
 
-	DBG("iosapic_init()\n");
-
 #ifdef __LP64__
 	if (is_pdc_pat()) {
 		int status;
@@ -371,7 +368,10 @@ void __init iosapic_init(void)
 	irt_num_entry = iosapic_load_irt(cell, &irt_cell);
 	if (irt_num_entry == 0)
 		irt_cell = NULL;	/* old PDC w/o iosapic */
+
+	return 0;
 }
+arch_initcall(iosapic_init);
 
 
 /*
@@ -890,7 +890,7 @@ iosapic_rd_version(struct iosapic_info *isi)
 **	o allocate and initialize isi_vector[]
 **	o allocate irq region
 */
-void *iosapic_register(unsigned long hpa)
+void *iosapic_register(unsigned long hpa, void __iomem *vaddr)
 {
 	struct iosapic_info *isi = NULL;
 	struct irt_entry *irte = irt_cell;
@@ -919,7 +919,7 @@ void *iosapic_register(unsigned long hpa)
 		return NULL;
 	}
 
-	isi->addr = ioremap(hpa, 4096);
+	isi->addr = vaddr;
 	isi->isi_hpa = hpa;
 	isi->isi_version = iosapic_rd_version(isi);
 	isi->isi_num_vectors = IOSAPIC_IRDT_MAX_ENTRY(isi->isi_version) + 1;

drivers/parisc/lasi.c

@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/pm.h>
 #include <linux/types.h>
+#include <linux/reboot.h>
 
 #include <asm/io.h>
 #include <asm/hardware.h>
@@ -145,23 +146,19 @@ static void __init lasi_led_init(unsigned long lasi_hpa)
  * 1 to PWR_ON_L in the Power Control Register
  * 
  */
-
-static unsigned long lasi_power_off_hpa __read_mostly;
-
-static void lasi_power_off(void)
+static int lasi_power_off(struct sys_off_data *data)
 {
-	unsigned long datareg;
+	struct gsc_asic *lasi = data->cb_data;
 
-	/* calculate addr of the Power Control Register */
-	datareg = lasi_power_off_hpa + 0x0000C000;
+	/* Power down the machine via Power Control Register */
+	gsc_writel(0x02, lasi->hpa + 0x0000C000);
 
-	/* Power down the machine */
-	gsc_writel(0x02, datareg);
+	/* might not be reached: */
+	return NOTIFY_DONE;
 }
 
 static int __init lasi_init_chip(struct parisc_device *dev)
 {
-	extern void (*chassis_power_off)(void);
 	struct gsc_asic *lasi;
 	int ret;
 
@@ -212,13 +209,10 @@ static int __init lasi_init_chip(struct parisc_device *dev)
 
 	gsc_fixup_irqs(dev, lasi, lasi_choose_irq);
 
-	/* initialize the power off function */
-	/* FIXME: Record the LASI HPA for the power off function.  This should
-	 * ensure that only the first LASI (the one controlling the power off)
-	 * should set the HPA here */
-	lasi_power_off_hpa = lasi->hpa;
-	chassis_power_off = lasi_power_off;
-	
+	/* register the LASI power off function */
+	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF,
+		SYS_OFF_PRIO_DEFAULT, lasi_power_off, lasi);
+
 	return ret;
 }
 
@@ -226,9 +220,16 @@ static struct parisc_device_id lasi_tbl[] __initdata = {
 	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00081 },
 	{ 0, }
 };
+MODULE_DEVICE_TABLE(parisc, lasi_tbl);
 
-struct parisc_driver lasi_driver __refdata = {
+static struct parisc_driver lasi_driver __refdata = {
 	.name =		"lasi",
 	.id_table =	lasi_tbl,
 	.probe =	lasi_init_chip,
 };
+
+static int __init lasi_init(void)
+{
+	return register_parisc_driver(&lasi_driver);
+}
+arch_initcall(lasi_init);

drivers/parisc/lba_pci.c

@@ -1535,7 +1535,8 @@ lba_driver_probe(struct parisc_device *dev)
 	}
 
 	/* Tell I/O SAPIC driver we have a IRQ handler/region. */
-	tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE);
+	tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE,
+						addr + LBA_IOSAPIC_BASE);
 
 	/* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't
 	**	have an IRT entry will get NULL back from iosapic code.
@@ -1681,10 +1682,11 @@ static struct parisc_driver lba_driver __refdata = {
 ** One time initialization to let the world know the LBA was found.
 ** Must be called exactly once before pci_init().
 */
-void __init lba_init(void)
+static int __init lba_init(void)
 {
-	register_parisc_driver(&lba_driver);
+	return register_parisc_driver(&lba_driver);
 }
+arch_initcall(lba_init);
 
 /*
 ** Initialize the IBASE/IMASK registers for LBA (Elroy).

drivers/parisc/sba_iommu.c

@@ -121,7 +121,7 @@ module_param(sba_reserve_agpgart, int, 0444);
 MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART");
 #endif
 
-struct proc_dir_entry *proc_runway_root __ro_after_init;
+static struct proc_dir_entry *proc_runway_root __ro_after_init;
 struct proc_dir_entry *proc_mckinley_root __ro_after_init;
 
 /************************************
@@ -1994,10 +1994,11 @@ static int __init sba_driver_callback(struct parisc_device *dev)
 ** This is the only routine which is NOT static.
 ** Must be called exactly once before pci_init().
 */
-void __init sba_init(void)
+static int __init sba_init(void)
 {
-	register_parisc_driver(&sba_driver);
+	return register_parisc_driver(&sba_driver);
 }
+arch_initcall(sba_init);
 
 
 /**

drivers/parisc/wax.c

@@ -4,7 +4,7 @@
  *
  *	(c) Copyright 2000 The Puffin Group Inc.
  *
- *	by Helge Deller <deller@gmx.de>
+ *	(c) 2000-2023 by Helge Deller <deller@gmx.de>
  */
 
 #include <linux/errno.h>
@@ -121,14 +121,20 @@ static int __init wax_init_chip(struct parisc_device *dev)
 }
 
 static const struct parisc_device_id wax_tbl[] __initconst = {
-  	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
+	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008e },
 	{ 0, }
 };
 
 MODULE_DEVICE_TABLE(parisc, wax_tbl);
 
-struct parisc_driver wax_driver __refdata = {
+static struct parisc_driver wax_driver __refdata = {
 	.name =		"wax",
 	.id_table =	wax_tbl,
 	.probe =	wax_init_chip,
 };
+
+static int __init wax_init(void)
+{
+	return register_parisc_driver(&wax_driver);
+}
+arch_initcall(wax_init);

mm/util.c

@@ -396,7 +396,10 @@ static int mmap_is_legacy(struct rlimit *rlim_stack)
 	if (current->personality & ADDR_COMPAT_LAYOUT)
 		return 1;
 
-	if (rlim_stack->rlim_cur == RLIM_INFINITY)
+	/* On parisc the stack always grows up - so a unlimited stack should
+	 * not be an indicator to use the legacy memory layout. */
+	if (rlim_stack->rlim_cur == RLIM_INFINITY &&
+		!IS_ENABLED(CONFIG_STACK_GROWSUP))
 		return 1;
 
 	return sysctl_legacy_va_layout;