diff options
Diffstat (limited to 'arch/parisc/kernel')
42 files changed, 1028 insertions, 477 deletions
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile index 8e5f1ab65c68..fc0df5c44468 100644 --- a/arch/parisc/kernel/Makefile +++ b/arch/parisc/kernel/Makefile @@ -9,7 +9,8 @@ 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 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 + process.o processor.o pdc_cons.o pdc_chassis.o unwind.o \ + patch.o ifdef CONFIG_FUNCTION_TRACER # Do not profile debug and lowlevel utilities @@ -32,3 +33,6 @@ obj-$(CONFIG_64BIT) += perf.o perf_asm.o $(obj64-y) obj-$(CONFIG_PARISC_CPU_TOPOLOGY) += topology.o obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o +obj-$(CONFIG_JUMP_LABEL) += jump_label.o +obj-$(CONFIG_KGDB) += kgdb.o +obj-$(CONFIG_KPROBES) += kprobes.o diff --git a/arch/parisc/kernel/alternative.c b/arch/parisc/kernel/alternative.c index bf2274e01a96..ca1f5ca0540a 100644 --- a/arch/parisc/kernel/alternative.c +++ b/arch/parisc/kernel/alternative.c @@ -56,7 +56,8 @@ void __init_or_module apply_alternatives(struct alt_instr *start, * time IO-PDIR is changed in Ike/Astro. */ if ((cond & ALT_COND_NO_IOC_FDC) && - (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC)) + ((boot_cpu_data.cpu_type <= pcxw_) || + (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC))) continue; /* Want to replace pdtlb by a pdtlb,l instruction? */ diff --git a/arch/parisc/kernel/asm-offsets.c b/arch/parisc/kernel/asm-offsets.c index dfff8a0d6fd1..aa79d35dedfa 100644 --- a/arch/parisc/kernel/asm-offsets.c +++ b/arch/parisc/kernel/asm-offsets.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Generate definitions needed by assembly language modules. * This code generates raw asm output which is post-processed to extract @@ -11,20 +12,6 @@ * Copyright (C) 2001 Richard Hirst <rhirst at parisc-linux.org> * Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org> * Copyright (C) 2003 James Bottomley <jejb at parisc-linux.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/types.h> diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 804880efa11e..a82b3eaa5398 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -29,9 +29,9 @@ #include <asm/sections.h> #include <asm/shmparam.h> -int split_tlb __read_mostly; -int dcache_stride __read_mostly; -int icache_stride __read_mostly; +int split_tlb __ro_after_init; +int dcache_stride __ro_after_init; +int icache_stride __ro_after_init; EXPORT_SYMBOL(dcache_stride); void flush_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr); @@ -40,16 +40,23 @@ void purge_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr); void flush_icache_page_asm(unsigned long phys_addr, unsigned long vaddr); -/* On some machines (e.g. ones with the Merced bus), there can be +/* On some machines (i.e., ones with the Merced bus), there can be * only a single PxTLB broadcast at a time; this must be guaranteed - * by software. We put a spinlock around all TLB flushes to - * ensure this. + * by software. We need a spinlock around all TLB flushes to ensure + * this. */ -DEFINE_SPINLOCK(pa_tlb_lock); +DEFINE_SPINLOCK(pa_tlb_flush_lock); -struct pdc_cache_info cache_info __read_mostly; +/* Swapper page setup lock. */ +DEFINE_SPINLOCK(pa_swapper_pg_lock); + +#if defined(CONFIG_64BIT) && defined(CONFIG_SMP) +int pa_serialize_tlb_flushes __ro_after_init; +#endif + +struct pdc_cache_info cache_info __ro_after_init; #ifndef CONFIG_PA20 -static struct pdc_btlb_info btlb_info __read_mostly; +static struct pdc_btlb_info btlb_info __ro_after_init; #endif #ifdef CONFIG_SMP @@ -374,10 +381,10 @@ EXPORT_SYMBOL(flush_data_cache_local); EXPORT_SYMBOL(flush_kernel_icache_range_asm); #define FLUSH_THRESHOLD 0x80000 /* 0.5MB */ -static unsigned long parisc_cache_flush_threshold __read_mostly = FLUSH_THRESHOLD; +static unsigned long parisc_cache_flush_threshold __ro_after_init = FLUSH_THRESHOLD; #define FLUSH_TLB_THRESHOLD (16*1024) /* 16 KiB minimum TLB threshold */ -static unsigned long parisc_tlb_flush_threshold __read_mostly = FLUSH_TLB_THRESHOLD; +static unsigned long parisc_tlb_flush_threshold __ro_after_init = FLUSH_TLB_THRESHOLD; void __init parisc_setup_cache_timing(void) { diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c index 5eb979d04b90..3b330e58a4f0 100644 --- a/arch/parisc/kernel/drivers.c +++ b/arch/parisc/kernel/drivers.c @@ -1,11 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * drivers.c * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Copyright (c) 1999 The Puffin Group * Copyright (c) 2001 Matthew Wilcox for Hewlett Packard * Copyright (c) 2001 Helge Deller <deller@gmx.de> @@ -38,9 +34,10 @@ #include <asm/io.h> #include <asm/pdc.h> #include <asm/parisc-device.h> +#include <asm/ropes.h> /* See comments in include/asm-parisc/pci.h */ -const struct dma_map_ops *hppa_dma_ops __read_mostly; +const struct dma_map_ops *hppa_dma_ops __ro_after_init; EXPORT_SYMBOL(hppa_dma_ops); static struct device root = { @@ -257,6 +254,30 @@ static struct parisc_device *find_device_by_addr(unsigned long hpa) return ret ? d.dev : NULL; } +static int __init is_IKE_device(struct device *dev, void *data) +{ + struct parisc_device *pdev = to_parisc_device(dev); + + if (!check_dev(dev)) + return 0; + if (pdev->id.hw_type != HPHW_BCPORT) + return 0; + if (IS_IKE(pdev) || + (pdev->id.hversion == REO_MERCED_PORT) || + (pdev->id.hversion == REOG_MERCED_PORT)) { + return 1; + } + return 0; +} + +int __init machine_has_merced_bus(void) +{ + int ret; + + ret = for_each_padev(is_IKE_device, NULL); + return ret ? 1 : 0; +} + /** * find_pa_parent_type - Find a parent of a specific type * @dev: The device to start searching from diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index d5eb19efa65b..89c801c2b5d1 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -1,3 +1,4 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Linux/PA-RISC Project (http://www.parisc-linux.org/) * @@ -6,20 +7,6 @@ * Copyright (C) 1999 SuSE GmbH Nuernberg * Copyright (C) 2000 Hewlett-Packard (John Marvin) * Copyright (C) 1999 Hewlett-Packard (Frank Rowand) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <asm/asm-offsets.h> @@ -50,12 +37,8 @@ .import pa_tlb_lock,data .macro load_pa_tlb_lock reg -#if __PA_LDCW_ALIGNMENT > 4 - load32 PA(pa_tlb_lock) + __PA_LDCW_ALIGNMENT-1, \reg - depi 0,31,__PA_LDCW_ALIGN_ORDER, \reg -#else - load32 PA(pa_tlb_lock), \reg -#endif + mfctl %cr25,\reg + addil L%(PAGE_SIZE << (PGD_ALLOC_ORDER - 1)),\reg .endm /* space_to_prot macro creates a prot id from a space id */ @@ -471,8 +454,9 @@ nop LDREG 0(\ptp),\pte bb,<,n \pte,_PAGE_PRESENT_BIT,3f + LDCW 0(\tmp),\tmp1 b \fault - stw,ma \spc,0(\tmp) + stw \spc,0(\tmp) 99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) #endif 2: LDREG 0(\ptp),\pte @@ -481,20 +465,22 @@ .endm /* Release pa_tlb_lock lock without reloading lock address. */ - .macro tlb_unlock0 spc,tmp + .macro tlb_unlock0 spc,tmp,tmp1 #ifdef CONFIG_SMP 98: or,COND(=) %r0,\spc,%r0 - stw,ma \spc,0(\tmp) + LDCW 0(\tmp),\tmp1 + or,COND(=) %r0,\spc,%r0 + stw \spc,0(\tmp) 99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) #endif .endm /* Release pa_tlb_lock lock. */ - .macro tlb_unlock1 spc,tmp + .macro tlb_unlock1 spc,tmp,tmp1 #ifdef CONFIG_SMP 98: load_pa_tlb_lock \tmp 99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) - tlb_unlock0 \spc,\tmp + tlb_unlock0 \spc,\tmp,\tmp1 #endif .endm @@ -1177,7 +1163,7 @@ dtlb_miss_20w: idtlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1203,7 +1189,7 @@ nadtlb_miss_20w: idtlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1237,7 +1223,7 @@ dtlb_miss_11: mtsp t1, %sr1 /* Restore sr1 */ - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1270,7 +1256,7 @@ nadtlb_miss_11: mtsp t1, %sr1 /* Restore sr1 */ - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1299,7 +1285,7 @@ dtlb_miss_20: idtlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1327,7 +1313,7 @@ nadtlb_miss_20: idtlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1434,7 +1420,7 @@ itlb_miss_20w: iitlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1458,7 +1444,7 @@ naitlb_miss_20w: iitlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1492,7 +1478,7 @@ itlb_miss_11: mtsp t1, %sr1 /* Restore sr1 */ - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1516,7 +1502,7 @@ naitlb_miss_11: mtsp t1, %sr1 /* Restore sr1 */ - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1546,7 +1532,7 @@ itlb_miss_20: iitlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1566,7 +1552,7 @@ naitlb_miss_20: iitlbt pte,prot - tlb_unlock1 spc,t0 + tlb_unlock1 spc,t0,t1 rfir nop @@ -1596,7 +1582,7 @@ dbit_trap_20w: idtlbt pte,prot - tlb_unlock0 spc,t0 + tlb_unlock0 spc,t0,t1 rfir nop #else @@ -1622,7 +1608,7 @@ dbit_trap_11: mtsp t1, %sr1 /* Restore sr1 */ - tlb_unlock0 spc,t0 + tlb_unlock0 spc,t0,t1 rfir nop @@ -1642,7 +1628,7 @@ dbit_trap_20: idtlbt pte,prot - tlb_unlock0 spc,t0 + tlb_unlock0 spc,t0,t1 rfir nop #endif diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c index e6f3b49f2fd7..58cc08e7fd12 100644 --- a/arch/parisc/kernel/firmware.c +++ b/arch/parisc/kernel/firmware.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * arch/parisc/kernel/firmware.c - safe PDC access routines * @@ -12,12 +13,6 @@ * Copyright 2003 Grant Grundler <grundler parisc-linux org> * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org> * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * */ /* I think it would be in everyone's best interest to follow this @@ -87,7 +82,7 @@ extern unsigned long pdc_result2[NUM_PDC_RESULT]; /* Firmware needs to be initially set to narrow to determine the * actual firmware width. */ -int parisc_narrow_firmware __read_mostly = 1; +int parisc_narrow_firmware __ro_after_init = 1; #endif /* On most currently-supported platforms, IODC I/O calls are 32-bit calls @@ -569,6 +564,30 @@ int pdc_model_capabilities(unsigned long *capabilities) } /** + * pdc_model_platform_info - Returns machine product and serial number. + * @orig_prod_num: Return buffer for original product number. + * @current_prod_num: Return buffer for current product number. + * @serial_no: Return buffer for serial number. + * + * Returns strings containing the original and current product numbers and the + * serial number of the system. + */ +int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num, + char *serial_no) +{ + int retval; + unsigned long flags; + + spin_lock_irqsave(&pdc_lock, flags); + retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO, + __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no)); + convert_to_wide(pdc_result); + spin_unlock_irqrestore(&pdc_lock, flags); + + return retval; +} + +/** * pdc_cache_info - Return cache and TLB information. * @cache_info: The return buffer. * diff --git a/arch/parisc/kernel/ftrace.c b/arch/parisc/kernel/ftrace.c index e46a4157a894..a28f915993b1 100644 --- a/arch/parisc/kernel/ftrace.c +++ b/arch/parisc/kernel/ftrace.c @@ -51,7 +51,6 @@ void notrace __hot ftrace_function_trampoline(unsigned long parent, unsigned long org_sp_gr3) { extern ftrace_func_t ftrace_trace_function; /* depends on CONFIG_DYNAMIC_FTRACE */ - extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace); if (ftrace_trace_function != ftrace_stub) { /* struct ftrace_ops *op, struct pt_regs *regs); */ diff --git a/arch/parisc/kernel/hardware.c b/arch/parisc/kernel/hardware.c index a2058953a53f..98c5203c1ab0 100644 --- a/arch/parisc/kernel/hardware.c +++ b/arch/parisc/kernel/hardware.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Hardware descriptions for HP 9000 based hardware, including * system types, SCSI controllers, DMA controllers, HPPB controllers @@ -9,21 +10,6 @@ * * Copyright 1999 by Alex deVries <alex@onefishtwo.ca> * and copyright 1999 The Puffin Group Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index fbb4e43fda05..951a339369dd 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S @@ -22,7 +22,7 @@ #include <linux/linkage.h> #include <linux/init.h> - .level LEVEL + .level PA_ASM_LEVEL __INITDATA ENTRY(boot_args) @@ -258,7 +258,7 @@ stext_pdc_ret: ldo R%PA(fault_vector_11)(%r10),%r10 $is_pa20: - .level LEVEL /* restore 1.1 || 2.0w */ + .level PA_ASM_LEVEL /* restore 1.1 || 2.0w */ #endif /*!CONFIG_64BIT*/ load32 PA(fault_vector_20),%r10 @@ -329,6 +329,19 @@ smp_slave_stext: mtsp %r0,%sr6 mtsp %r0,%sr7 +#ifdef CONFIG_64BIT + /* + * Enable Wide mode early, in case the task_struct for the idle + * task in smp_init_current_idle_task was allocated above 4GB. + */ +1: mfia %rp /* clear upper part of pcoq */ + ldo 2f-1b(%rp),%rp + depdi 0,31,32,%rp + bv (%rp) + ssm PSW_SM_W,%r0 +2: +#endif + /* Initialize the SP - monarch sets up smp_init_current_idle_task */ load32 PA(smp_init_current_idle_task),%sp LDREG 0(%sp),%sp /* load task address */ @@ -363,7 +376,7 @@ smp_slave_stext: ENDPROC(parisc_kernel_start) #ifndef CONFIG_64BIT - .section .data..read_mostly + .section .data..ro_after_init .align 4 .export $global$,data diff --git a/arch/parisc/kernel/hpmc.S b/arch/parisc/kernel/hpmc.S index fde654115564..81de5e2b391c 100644 --- a/arch/parisc/kernel/hpmc.S +++ b/arch/parisc/kernel/hpmc.S @@ -1,23 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * HPMC (High Priority Machine Check) handler. * * Copyright (C) 1999 Philipp Rumpf <prumpf@tux.org> * Copyright (C) 1999 Hewlett-Packard (Frank Rowand) * Copyright (C) 2000 Hewlett-Packard (John Marvin) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ diff --git a/arch/parisc/kernel/inventory.c b/arch/parisc/kernel/inventory.c index 35d05fdd7483..9298f2285510 100644 --- a/arch/parisc/kernel/inventory.c +++ b/arch/parisc/kernel/inventory.c @@ -1,11 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * inventory.c * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * * Copyright (c) 1999 The Puffin Group (David Kennedy and Alex deVries) * Copyright (c) 2001 Matthew Wilcox for Hewlett-Packard * @@ -31,6 +27,7 @@ #include <asm/processor.h> #include <asm/page.h> #include <asm/parisc-device.h> +#include <asm/tlbflush.h> /* ** Debug options @@ -38,12 +35,12 @@ */ #undef DEBUG_PAT -int pdc_type __read_mostly = PDC_TYPE_ILLEGAL; +int pdc_type __ro_after_init = PDC_TYPE_ILLEGAL; /* cell number and location (PAT firmware only) */ -unsigned long parisc_cell_num __read_mostly; -unsigned long parisc_cell_loc __read_mostly; -unsigned long parisc_pat_pdc_cap __read_mostly; +unsigned long parisc_cell_num __ro_after_init; +unsigned long parisc_cell_loc __ro_after_init; +unsigned long parisc_pat_pdc_cap __ro_after_init; void __init setup_pdc(void) @@ -638,4 +635,10 @@ void __init do_device_inventory(void) } printk(KERN_INFO "Found devices:\n"); print_parisc_devices(); + +#if defined(CONFIG_64BIT) && defined(CONFIG_SMP) + pa_serialize_tlb_flushes = machine_has_merced_bus(); + if (pa_serialize_tlb_flushes) + pr_info("Merced bus found: Enable PxTLB serialization.\n"); +#endif } diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index 0ca254085a66..e5fcfb70cc7c 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Code to handle x86 style IRQs plus some generic interrupt stuff. * @@ -6,20 +7,6 @@ * Copyright (C) 1999 SuSE GmbH (Philipp Rumpf, prumpf@tux.org) * Copyright (C) 1999-2000 Grant Grundler * Copyright (c) 2005 Matthew Wilcox - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/bitops.h> #include <linux/errno.h> @@ -117,7 +104,10 @@ int cpu_check_affinity(struct irq_data *d, const struct cpumask *dest) return -EINVAL; /* whatever mask they set, we just allow one CPU */ - cpu_dest = cpumask_first_and(dest, cpu_online_mask); + cpu_dest = cpumask_next_and(d->irq & (num_online_cpus()-1), + dest, cpu_online_mask); + if (cpu_dest >= nr_cpu_ids) + cpu_dest = cpumask_first_and(dest, cpu_online_mask); return cpu_dest; } @@ -175,10 +165,16 @@ int arch_show_interrupts(struct seq_file *p, int prec) # endif #endif #ifdef CONFIG_SMP - seq_printf(p, "%*s: ", prec, "RES"); - for_each_online_cpu(j) - seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count); - seq_puts(p, " Rescheduling interrupts\n"); + if (num_online_cpus() > 1) { + seq_printf(p, "%*s: ", prec, "RES"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count); + seq_puts(p, " Rescheduling interrupts\n"); + seq_printf(p, "%*s: ", prec, "CAL"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->irq_call_count); + seq_puts(p, " Function call interrupts\n"); + } #endif seq_printf(p, "%*s: ", prec, "UAH"); for_each_online_cpu(j) diff --git a/arch/parisc/kernel/jump_label.c b/arch/parisc/kernel/jump_label.c new file mode 100644 index 000000000000..d2f3cb12e282 --- /dev/null +++ b/arch/parisc/kernel/jump_label.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Helge Deller <deller@gmx.de> + * + * Based on arch/arm64/kernel/jump_label.c + */ +#include <linux/kernel.h> +#include <linux/jump_label.h> +#include <linux/bug.h> +#include <asm/alternative.h> +#include <asm/patch.h> + +static inline int reassemble_17(int as17) +{ + return (((as17 & 0x10000) >> 16) | + ((as17 & 0x0f800) << 5) | + ((as17 & 0x00400) >> 8) | + ((as17 & 0x003ff) << 3)); +} + +void arch_jump_label_transform(struct jump_entry *entry, + enum jump_label_type type) +{ + void *addr = (void *)jump_entry_code(entry); + u32 insn; + + if (type == JUMP_LABEL_JMP) { + void *target = (void *)jump_entry_target(entry); + int distance = target - addr; + /* + * Encode the PA1.1 "b,n" instruction with a 17-bit + * displacement. In case we hit the BUG(), we could use + * another branch instruction with a 22-bit displacement on + * 64-bit CPUs instead. But this seems sufficient for now. + */ + distance -= 8; + BUG_ON(distance > 262143 || distance < -262144); + insn = 0xe8000002 | reassemble_17(distance >> 2); + } else { + insn = INSN_NOP; + } + + patch_text(addr, insn); +} + +void arch_jump_label_transform_static(struct jump_entry *entry, + enum jump_label_type type) +{ + /* + * We use the architected NOP in arch_static_branch, so there's no + * need to patch an identical NOP over the top of it here. The core + * will call arch_jump_label_transform from a module notifier if the + * NOP needs to be replaced by a branch. + */ +} diff --git a/arch/parisc/kernel/kgdb.c b/arch/parisc/kernel/kgdb.c new file mode 100644 index 000000000000..664278db9b97 --- /dev/null +++ b/arch/parisc/kernel/kgdb.c @@ -0,0 +1,209 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * PA-RISC KGDB support + * + * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> + * + */ + +#include <linux/kgdb.h> +#include <linux/string.h> +#include <linux/sched.h> +#include <linux/notifier.h> +#include <linux/kdebug.h> +#include <linux/uaccess.h> +#include <asm/ptrace.h> +#include <asm/traps.h> +#include <asm/processor.h> +#include <asm/patch.h> +#include <asm/cacheflush.h> + +const struct kgdb_arch arch_kgdb_ops = { + .gdb_bpt_instr = { 0x03, 0xff, 0xa0, 0x1f } +}; + +static int __kgdb_notify(struct die_args *args, unsigned long cmd) +{ + struct pt_regs *regs = args->regs; + + if (kgdb_handle_exception(1, args->signr, cmd, regs)) + return NOTIFY_DONE; + return NOTIFY_STOP; +} + +static int kgdb_notify(struct notifier_block *self, + unsigned long cmd, void *ptr) +{ + unsigned long flags; + int ret; + + local_irq_save(flags); + ret = __kgdb_notify(ptr, cmd); + local_irq_restore(flags); + + return ret; +} + +static struct notifier_block kgdb_notifier = { + .notifier_call = kgdb_notify, + .priority = -INT_MAX, +}; + +int kgdb_arch_init(void) +{ + return register_die_notifier(&kgdb_notifier); +} + +void kgdb_arch_exit(void) +{ + unregister_die_notifier(&kgdb_notifier); +} + +void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs) +{ + struct parisc_gdb_regs *gr = (struct parisc_gdb_regs *)gdb_regs; + + memset(gr, 0, sizeof(struct parisc_gdb_regs)); + + memcpy(gr->gpr, regs->gr, sizeof(gr->gpr)); + memcpy(gr->fr, regs->fr, sizeof(gr->fr)); + + gr->sr0 = regs->sr[0]; + gr->sr1 = regs->sr[1]; + gr->sr2 = regs->sr[2]; + gr->sr3 = regs->sr[3]; + gr->sr4 = regs->sr[4]; + gr->sr5 = regs->sr[5]; + gr->sr6 = regs->sr[6]; + gr->sr7 = regs->sr[7]; + + gr->sar = regs->sar; + gr->iir = regs->iir; + gr->isr = regs->isr; + gr->ior = regs->ior; + gr->ipsw = regs->ipsw; + gr->cr27 = regs->cr27; + + gr->iaoq_f = regs->iaoq[0]; + gr->iasq_f = regs->iasq[0]; + + gr->iaoq_b = regs->iaoq[1]; + gr->iasq_b = regs->iasq[1]; +} + +void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs) +{ + struct parisc_gdb_regs *gr = (struct parisc_gdb_regs *)gdb_regs; + + + memcpy(regs->gr, gr->gpr, sizeof(regs->gr)); + memcpy(regs->fr, gr->fr, sizeof(regs->fr)); + + regs->sr[0] = gr->sr0; + regs->sr[1] = gr->sr1; + regs->sr[2] = gr->sr2; + regs->sr[3] = gr->sr3; + regs->sr[4] = gr->sr4; + regs->sr[5] = gr->sr5; + regs->sr[6] = gr->sr6; + regs->sr[7] = gr->sr7; + + regs->sar = gr->sar; + regs->iir = gr->iir; + regs->isr = gr->isr; + regs->ior = gr->ior; + regs->ipsw = gr->ipsw; + regs->cr27 = gr->cr27; + + regs->iaoq[0] = gr->iaoq_f; + regs->iasq[0] = gr->iasq_f; + + regs->iaoq[1] = gr->iaoq_b; + regs->iasq[1] = gr->iasq_b; +} + +void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, + struct task_struct *task) +{ + struct pt_regs *regs = task_pt_regs(task); + unsigned long gr30, iaoq; + + gr30 = regs->gr[30]; + iaoq = regs->iaoq[0]; + + regs->gr[30] = regs->ksp; + regs->iaoq[0] = regs->kpc; + pt_regs_to_gdb_regs(gdb_regs, regs); + + regs->gr[30] = gr30; + regs->iaoq[0] = iaoq; + +} + +static void step_instruction_queue(struct pt_regs *regs) +{ + regs->iaoq[0] = regs->iaoq[1]; + regs->iaoq[1] += 4; +} + +void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long ip) +{ + regs->iaoq[0] = ip; + regs->iaoq[1] = ip + 4; +} + +int kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt) +{ + int ret = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr, + BREAK_INSTR_SIZE); + if (ret) + return ret; + + __patch_text((void *)bpt->bpt_addr, + *(unsigned int *)&arch_kgdb_ops.gdb_bpt_instr); + return ret; +} + +int kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt) +{ + __patch_text((void *)bpt->bpt_addr, *(unsigned int *)&bpt->saved_instr); + return 0; +} + +int kgdb_arch_handle_exception(int trap, int signo, + int err_code, char *inbuf, char *outbuf, + struct pt_regs *regs) +{ + unsigned long addr; + char *p = inbuf + 1; + + switch (inbuf[0]) { + case 'D': + case 'c': + case 'k': + kgdb_contthread = NULL; + kgdb_single_step = 0; + + if (kgdb_hex2long(&p, &addr)) + kgdb_arch_set_pc(regs, addr); + else if (trap == 9 && regs->iir == + PARISC_KGDB_COMPILED_BREAK_INSN) + step_instruction_queue(regs); + return 0; + case 's': + kgdb_single_step = 1; + if (kgdb_hex2long(&p, &addr)) { + kgdb_arch_set_pc(regs, addr); + } else if (trap == 9 && regs->iir == + PARISC_KGDB_COMPILED_BREAK_INSN) { + step_instruction_queue(regs); + mtctl(-1, 0); + } else { + mtctl(0, 0); + } + regs->gr[0] |= PSW_R; + return 0; + + } + return -1; +} diff --git a/arch/parisc/kernel/kprobes.c b/arch/parisc/kernel/kprobes.c new file mode 100644 index 000000000000..d58960b33bda --- /dev/null +++ b/arch/parisc/kernel/kprobes.c @@ -0,0 +1,291 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * arch/parisc/kernel/kprobes.c + * + * PA-RISC kprobes implementation + * + * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> + */ + +#include <linux/types.h> +#include <linux/kprobes.h> +#include <linux/slab.h> +#include <asm/cacheflush.h> +#include <asm/patch.h> + +DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL; +DEFINE_PER_CPU(struct kprobe_ctlblk, kprobe_ctlblk); + +int __kprobes arch_prepare_kprobe(struct kprobe *p) +{ + if ((unsigned long)p->addr & 3UL) + return -EINVAL; + + p->ainsn.insn = get_insn_slot(); + if (!p->ainsn.insn) + return -ENOMEM; + + memcpy(p->ainsn.insn, p->addr, + MAX_INSN_SIZE * sizeof(kprobe_opcode_t)); + p->opcode = *p->addr; + flush_insn_slot(p); + return 0; +} + +void __kprobes arch_remove_kprobe(struct kprobe *p) +{ + if (!p->ainsn.insn) + return; + + free_insn_slot(p->ainsn.insn, 0); + p->ainsn.insn = NULL; +} + +void __kprobes arch_arm_kprobe(struct kprobe *p) +{ + patch_text(p->addr, PARISC_KPROBES_BREAK_INSN); +} + +void __kprobes arch_disarm_kprobe(struct kprobe *p) +{ + patch_text(p->addr, p->opcode); +} + +static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb) +{ + kcb->prev_kprobe.kp = kprobe_running(); + kcb->prev_kprobe.status = kcb->kprobe_status; +} + +static void __kprobes restore_previous_kprobe(struct kprobe_ctlblk *kcb) +{ + __this_cpu_write(current_kprobe, kcb->prev_kprobe.kp); + kcb->kprobe_status = kcb->prev_kprobe.status; +} + +static inline void __kprobes set_current_kprobe(struct kprobe *p) +{ + __this_cpu_write(current_kprobe, p); +} + +static void __kprobes setup_singlestep(struct kprobe *p, + struct kprobe_ctlblk *kcb, struct pt_regs *regs) +{ + kcb->iaoq[0] = regs->iaoq[0]; + kcb->iaoq[1] = regs->iaoq[1]; + regs->iaoq[0] = (unsigned long)p->ainsn.insn; + mtctl(0, 0); + regs->gr[0] |= PSW_R; +} + +int __kprobes parisc_kprobe_break_handler(struct pt_regs *regs) +{ + struct kprobe *p; + struct kprobe_ctlblk *kcb; + + preempt_disable(); + + kcb = get_kprobe_ctlblk(); + p = get_kprobe((unsigned long *)regs->iaoq[0]); + + if (!p) { + preempt_enable_no_resched(); + return 0; + } + + if (kprobe_running()) { + /* + * We have reentered the kprobe_handler, since another kprobe + * was hit while within the handler, we save the original + * kprobes and single step on the instruction of the new probe + * without calling any user handlers to avoid recursive + * kprobes. + */ + save_previous_kprobe(kcb); + set_current_kprobe(p); + kprobes_inc_nmissed_count(p); + setup_singlestep(p, kcb, regs); + kcb->kprobe_status = KPROBE_REENTER; + return 1; + } + + set_current_kprobe(p); + kcb->kprobe_status = KPROBE_HIT_ACTIVE; + + /* If we have no pre-handler or it returned 0, we continue with + * normal processing. If we have a pre-handler and it returned + * non-zero - which means user handler setup registers to exit + * to another instruction, we must skip the single stepping. + */ + + if (!p->pre_handler || !p->pre_handler(p, regs)) { + setup_singlestep(p, kcb, regs); + kcb->kprobe_status = KPROBE_HIT_SS; + } else { + reset_current_kprobe(); + preempt_enable_no_resched(); + } + return 1; +} + +int __kprobes parisc_kprobe_ss_handler(struct pt_regs *regs) +{ + struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + struct kprobe *p = kprobe_running(); + + if (regs->iaoq[0] != (unsigned long)p->ainsn.insn+4) + return 0; + + /* restore back original saved kprobe variables and continue */ + if (kcb->kprobe_status == KPROBE_REENTER) { + restore_previous_kprobe(kcb); + return 1; + } + + /* for absolute branch instructions we can copy iaoq_b. for relative + * branch instructions we need to calculate the new address based on the + * difference between iaoq_f and iaoq_b. We cannot use iaoq_b without + * modificationt because it's based on our ainsn.insn address. + */ + + if (p->post_handler) + p->post_handler(p, regs, 0); + + switch (regs->iir >> 26) { + case 0x38: /* BE */ + case 0x39: /* BE,L */ + case 0x3a: /* BV */ + case 0x3b: /* BVE */ + /* for absolute branches, regs->iaoq[1] has already the right + * address + */ + regs->iaoq[0] = kcb->iaoq[1]; + break; + default: + regs->iaoq[1] = kcb->iaoq[0]; + regs->iaoq[1] += (regs->iaoq[1] - regs->iaoq[0]) + 4; + regs->iaoq[0] = kcb->iaoq[1]; + break; + } + kcb->kprobe_status = KPROBE_HIT_SSDONE; + reset_current_kprobe(); + return 1; +} + +static inline void kretprobe_trampoline(void) +{ + asm volatile("nop"); + asm volatile("nop"); +} + +static int __kprobes trampoline_probe_handler(struct kprobe *p, + struct pt_regs *regs); + +static struct kprobe trampoline_p = { + .pre_handler = trampoline_probe_handler +}; + +static int __kprobes trampoline_probe_handler(struct kprobe *p, + struct pt_regs *regs) +{ + struct kretprobe_instance *ri = NULL; + struct hlist_head *head, empty_rp; + struct hlist_node *tmp; + unsigned long flags, orig_ret_address = 0; + unsigned long trampoline_address = (unsigned long)trampoline_p.addr; + kprobe_opcode_t *correct_ret_addr = NULL; + + INIT_HLIST_HEAD(&empty_rp); + kretprobe_hash_lock(current, &head, &flags); + + /* + * It is possible to have multiple instances associated with a given + * task either because multiple functions in the call path have + * a return probe installed on them, and/or more than one return + * probe was registered for a target function. + * + * We can handle this because: + * - instances are always inserted at the head of the list + * - when multiple return probes are registered for the same + * function, the first instance's ret_addr will point to the + * real return address, and all the rest will point to + * kretprobe_trampoline + */ + hlist_for_each_entry_safe(ri, tmp, head, hlist) { + if (ri->task != current) + /* another task is sharing our hash bucket */ + continue; + + orig_ret_address = (unsigned long)ri->ret_addr; + + if (orig_ret_address != trampoline_address) + /* + * This is the real return address. Any other + * instances associated with this task are for + * other calls deeper on the call stack + */ + break; + } + + kretprobe_assert(ri, orig_ret_address, trampoline_address); + + correct_ret_addr = ri->ret_addr; + hlist_for_each_entry_safe(ri, tmp, head, hlist) { + if (ri->task != current) + /* another task is sharing our hash bucket */ + continue; + + orig_ret_address = (unsigned long)ri->ret_addr; + if (ri->rp && ri->rp->handler) { + __this_cpu_write(current_kprobe, &ri->rp->kp); + get_kprobe_ctlblk()->kprobe_status = KPROBE_HIT_ACTIVE; + ri->ret_addr = correct_ret_addr; + ri->rp->handler(ri, regs); + __this_cpu_write(current_kprobe, NULL); + } + + recycle_rp_inst(ri, &empty_rp); + + if (orig_ret_address != trampoline_address) + /* + * This is the real return address. Any other + * instances associated with this task are for + * other calls deeper on the call stack + */ + break; + } + + kretprobe_hash_unlock(current, &flags); + + hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) { + hlist_del(&ri->hlist); + kfree(ri); + } + instruction_pointer_set(regs, orig_ret_address); + return 1; +} + +void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri, + struct pt_regs *regs) +{ + ri->ret_addr = (kprobe_opcode_t *)regs->gr[2]; + + /* Replace the return addr with trampoline addr. */ + regs->gr[2] = (unsigned long)trampoline_p.addr; +} + +int __kprobes arch_trampoline_kprobe(struct kprobe *p) +{ + return p->addr == trampoline_p.addr; +} +bool arch_kprobe_on_func_entry(unsigned long offset) +{ + return !offset; +} + +int __init arch_init_kprobes(void) +{ + trampoline_p.addr = (kprobe_opcode_t *) + dereference_function_descriptor(kretprobe_trampoline); + return register_kprobe(&trampoline_p); +} diff --git a/arch/parisc/kernel/module.c b/arch/parisc/kernel/module.c index 43778420614b..1f0f29a289d3 100644 --- a/arch/parisc/kernel/module.c +++ b/arch/parisc/kernel/module.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Kernel dynamically loadable module help for PARISC. * * The best reference for this stuff is probably the Processor- @@ -8,22 +9,6 @@ * Copyright (C) 2003 Randolph Chung <tausq at debian . org> * Copyright (C) 2008 Helge Deller <deller@gmx.de> * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * * Notes: * - PLT stub handling * On 32bit (and sometimes 64bit) and with big kernel modules like xfs or @@ -801,6 +786,10 @@ int apply_relocate_add(Elf_Shdr *sechdrs, /* 32-bit PC relative address */ *loc = val - dot - 8 + addend; break; + case R_PARISC_PCREL64: + /* 64-bit PC relative address */ + *loc64 = val - dot - 8 + addend; + break; case R_PARISC_DIR64: /* 64-bit effective address */ *loc64 = val + addend; diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S index 187f032c9dd8..ba67893a1d72 100644 --- a/arch/parisc/kernel/pacache.S +++ b/arch/parisc/kernel/pacache.S @@ -1,22 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * PARISC TLB and cache flushing support * Copyright (C) 2000-2001 Hewlett-Packard (John Marvin) * Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org) * Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* @@ -311,39 +298,6 @@ fdsync: nop ENDPROC_CFI(flush_data_cache_local) -/* Macros to serialize TLB purge operations on SMP. */ - - .macro tlb_lock la,flags,tmp -#ifdef CONFIG_SMP -98: -#if __PA_LDCW_ALIGNMENT > 4 - load32 pa_tlb_lock + __PA_LDCW_ALIGNMENT-1, \la - depi 0,31,__PA_LDCW_ALIGN_ORDER, \la -#else - load32 pa_tlb_lock, \la -#endif - rsm PSW_SM_I,\flags -1: LDCW 0(\la),\tmp - cmpib,<>,n 0,\tmp,3f -2: ldw 0(\la),\tmp - cmpb,<> %r0,\tmp,1b - nop - b,n 2b -3: -99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) -#endif - .endm - - .macro tlb_unlock la,flags,tmp -#ifdef CONFIG_SMP -98: ldi 1,\tmp - sync - stw \tmp,0(\la) - mtsm \flags -99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) -#endif - .endm - /* Clear page using kernel mapping. */ ENTRY_CFI(clear_page_asm) @@ -601,10 +555,8 @@ ENTRY_CFI(copy_user_page_asm) pdtlb,l %r0(%r28) pdtlb,l %r0(%r29) #else - tlb_lock %r20,%r21,%r22 0: pdtlb %r0(%r28) 1: pdtlb %r0(%r29) - tlb_unlock %r20,%r21,%r22 ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB) ALTERNATIVE(1b, 1b+4, ALT_COND_NO_SMP, INSN_PxTLB) #endif @@ -743,9 +695,7 @@ ENTRY_CFI(clear_user_page_asm) #ifdef CONFIG_PA20 pdtlb,l %r0(%r28) #else - tlb_lock %r20,%r21,%r22 0: pdtlb %r0(%r28) - tlb_unlock %r20,%r21,%r22 ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB) #endif @@ -821,9 +771,7 @@ ENTRY_CFI(flush_dcache_page_asm) #ifdef CONFIG_PA20 pdtlb,l %r0(%r28) #else - tlb_lock %r20,%r21,%r22 0: pdtlb %r0(%r28) - tlb_unlock %r20,%r21,%r22 ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB) #endif @@ -882,9 +830,7 @@ ENTRY_CFI(purge_dcache_page_asm) #ifdef CONFIG_PA20 pdtlb,l %r0(%r28) #else - tlb_lock %r20,%r21,%r22 0: pdtlb %r0(%r28) - tlb_unlock %r20,%r21,%r22 ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB) #endif @@ -948,10 +894,8 @@ ENTRY_CFI(flush_icache_page_asm) 1: pitlb,l %r0(%sr4,%r28) ALTERNATIVE(1b, 1b+4, ALT_COND_NO_SPLIT_TLB, INSN_NOP) #else - tlb_lock %r20,%r21,%r22 0: pdtlb %r0(%r28) 1: pitlb %r0(%sr4,%r28) - tlb_unlock %r20,%r21,%r22 ALTERNATIVE(0b, 0b+4, ALT_COND_NO_SMP, INSN_PxTLB) ALTERNATIVE(1b, 1b+4, ALT_COND_NO_SMP, INSN_PxTLB) ALTERNATIVE(1b, 1b+4, ALT_COND_NO_SPLIT_TLB, INSN_NOP) diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c index 7baa2265d439..e8a6a751dfd8 100644 --- a/arch/parisc/kernel/parisc_ksyms.c +++ b/arch/parisc/kernel/parisc_ksyms.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Architecture-specific kernel symbols * @@ -8,20 +9,6 @@ * Copyright (C) 2002-2003 Matthew Wilcox <willy at parisc-linux.org> * Copyright (C) 2002 Randolph Chung <tausq at parisc-linux.org> * Copyright (C) 2002-2007 Helge Deller <deller with parisc-linux.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> @@ -138,12 +125,6 @@ extern void $$dyncall(void); EXPORT_SYMBOL($$dyncall); #endif -#ifdef CONFIG_DISCONTIGMEM -#include <asm/mmzone.h> -EXPORT_SYMBOL(node_data); -EXPORT_SYMBOL(pfnnid_map); -#endif - #ifdef CONFIG_FUNCTION_TRACER extern void _mcount(void); EXPORT_SYMBOL(_mcount); diff --git a/arch/parisc/kernel/patch.c b/arch/parisc/kernel/patch.c new file mode 100644 index 000000000000..cdcd981278b3 --- /dev/null +++ b/arch/parisc/kernel/patch.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 + /* + * functions to patch RO kernel text during runtime + * + * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> + */ + +#include <linux/kernel.h> +#include <linux/spinlock.h> +#include <linux/kprobes.h> +#include <linux/mm.h> +#include <linux/stop_machine.h> + +#include <asm/cacheflush.h> +#include <asm/fixmap.h> +#include <asm/patch.h> + +struct patch { + void *addr; + unsigned int insn; +}; + +static void __kprobes *patch_map(void *addr, int fixmap) +{ + unsigned long uintaddr = (uintptr_t) addr; + bool module = !core_kernel_text(uintaddr); + struct page *page; + + if (module && IS_ENABLED(CONFIG_STRICT_MODULE_RWX)) + page = vmalloc_to_page(addr); + else if (!module && IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) + page = virt_to_page(addr); + else + return addr; + + set_fixmap(fixmap, page_to_phys(page)); + + return (void *) (__fix_to_virt(fixmap) + (uintaddr & ~PAGE_MASK)); +} + +static void __kprobes patch_unmap(int fixmap) +{ + clear_fixmap(fixmap); +} + +void __kprobes __patch_text(void *addr, unsigned int insn) +{ + void *waddr = addr; + int size; + + waddr = patch_map(addr, FIX_TEXT_POKE0); + *(u32 *)waddr = insn; + size = sizeof(u32); + flush_kernel_vmap_range(waddr, size); + patch_unmap(FIX_TEXT_POKE0); + flush_icache_range((uintptr_t)(addr), + (uintptr_t)(addr) + size); +} + +static int __kprobes patch_text_stop_machine(void *data) +{ + struct patch *patch = data; + + __patch_text(patch->addr, patch->insn); + + return 0; +} + +void __kprobes patch_text(void *addr, unsigned int insn) +{ + struct patch patch = { + .addr = addr, + .insn = insn, + }; + + stop_machine_cpuslocked(patch_text_stop_machine, &patch, NULL); +} diff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c index ae684ac6efb6..bc41ca243cfe 100644 --- a/arch/parisc/kernel/pci.c +++ b/arch/parisc/kernel/pci.c @@ -45,14 +45,14 @@ * #define pci_post_reset_delay 50 */ -struct pci_port_ops *pci_port __read_mostly; -struct pci_bios_ops *pci_bios __read_mostly; +struct pci_port_ops *pci_port __ro_after_init; +struct pci_bios_ops *pci_bios __ro_after_init; -static int pci_hba_count __read_mostly; +static int pci_hba_count __ro_after_init; /* parisc_pci_hba used by pci_port->in/out() ops to lookup bus data. */ #define PCI_HBA_MAX 32 -static struct pci_hba_data *parisc_pci_hba[PCI_HBA_MAX] __read_mostly; +static struct pci_hba_data *parisc_pci_hba[PCI_HBA_MAX] __ro_after_init; /******************************************************************** diff --git a/arch/parisc/kernel/pdc_chassis.c b/arch/parisc/kernel/pdc_chassis.c index 28e07482b0f1..75ae88d13909 100644 --- a/arch/parisc/kernel/pdc_chassis.c +++ b/arch/parisc/kernel/pdc_chassis.c @@ -1,22 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * interfaces to Chassis Codes via PDC (firmware) * * Copyright (C) 2002 Laurent Canet <canetl@esiee.fr> * Copyright (C) 2002-2006 Thibaut VARENE <varenet@parisc-linux.org> * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * * TODO: poll chassis warns, trigger (configurable) machine shutdown when * needed. * Find out how to get Chassis warnings out of PAT boxes? diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c index c46bf29ae412..7ed404c60a9e 100644 --- a/arch/parisc/kernel/pdc_cons.c +++ b/arch/parisc/kernel/pdc_cons.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PDC Console support - ie use firmware to dump text via boot console * @@ -13,21 +14,6 @@ * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org> * Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org> * Copyright (C) 2010 Guy Martin <gmsoft at tuxicoman.be> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* diff --git a/arch/parisc/kernel/perf.c b/arch/parisc/kernel/perf.c index 0813359049ae..676683641d00 100644 --- a/arch/parisc/kernel/perf.c +++ b/arch/parisc/kernel/perf.c @@ -1,22 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Parisc performance counters * Copyright (C) 2001 Randolph Chung <tausq@debian.org> * * This code is derived, with permission, from HP/UX sources. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* diff --git a/arch/parisc/kernel/perf_asm.S b/arch/parisc/kernel/perf_asm.S index fa6ea99bb324..8fceabb1a832 100644 --- a/arch/parisc/kernel/perf_asm.S +++ b/arch/parisc/kernel/perf_asm.S @@ -1,22 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* low-level asm for "intrigue" (PA8500-8700 CPU perf counters) * * Copyright (C) 2001 Randolph Chung <tausq at parisc-linux.org> * Copyright (C) 2001 Hewlett-Packard (Grant Grundler) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <asm/assembly.h> diff --git a/arch/parisc/kernel/perf_images.h b/arch/parisc/kernel/perf_images.h index 7fef9644df47..7afa2fd550bf 100644 --- a/arch/parisc/kernel/perf_images.h +++ b/arch/parisc/kernel/perf_images.h @@ -1,22 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Imagine for use with the Onyx (PCX-U) CPU interface * * Copyright (C) 2001 Randolph Chung <tausq at parisc-linux.org> * Copyright (C) 2001 Hewlett-Packard (Grant Grundler) - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef PERF_IMAGES_H #define PERF_IMAGES_H @@ -25,7 +12,7 @@ #define PCXU_IMAGE_SIZE 584 -static uint32_t onyx_images[][PCXU_IMAGE_SIZE/sizeof(uint32_t)] __read_mostly = { +static uint32_t onyx_images[][PCXU_IMAGE_SIZE/sizeof(uint32_t)] __ro_after_init = { /* * CPI: * @@ -2093,7 +2080,7 @@ static uint32_t onyx_images[][PCXU_IMAGE_SIZE/sizeof(uint32_t)] __read_mostly = }; #define PCXW_IMAGE_SIZE 576 -static uint32_t cuda_images[][PCXW_IMAGE_SIZE/sizeof(uint32_t)] __read_mostly = { +static uint32_t cuda_images[][PCXW_IMAGE_SIZE/sizeof(uint32_t)] __ro_after_init = { /* * CPI: FROM CPI.IDF (Image 0) * diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index eb39e7e380d7..ecc5c2771208 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PARISC Architecture-dependent parts of process handling * based on the work for i386 @@ -15,21 +16,6 @@ * Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org> * Copyright (C) 2001-2014 Helge Deller <deller@gmx.de> * Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <stdarg.h> @@ -192,7 +178,8 @@ int dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *r) * QEMU idle the host too. */ -int running_on_qemu __read_mostly; +int running_on_qemu __ro_after_init; +EXPORT_SYMBOL(running_on_qemu); void __cpuidle arch_cpu_idle_dead(void) { @@ -210,12 +197,6 @@ void __cpuidle arch_cpu_idle(void) static int __init parisc_idle_init(void) { - const char *marker; - - /* check QEMU/SeaBIOS marker in PAGE0 */ - marker = (char *) &PAGE0->pad0; - running_on_qemu = (memcmp(marker, "SeaBIOS", 8) == 0); - if (!running_on_qemu) cpu_idle_poll_ctrl(1); diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c index 82bd0d0927ce..13f771f74ee3 100644 --- a/arch/parisc/kernel/processor.c +++ b/arch/parisc/kernel/processor.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Initial setup-routines for HP 9000 based hardware. * @@ -9,21 +10,6 @@ * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> * * Initial PA-RISC Version: 04-23-1999 by Helge Deller - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ #include <linux/delay.h> #include <linux/init.h> @@ -43,10 +29,10 @@ #include <asm/irq.h> /* for struct irq_region */ #include <asm/parisc-device.h> -struct system_cpuinfo_parisc boot_cpu_data __read_mostly; +struct system_cpuinfo_parisc boot_cpu_data __ro_after_init; EXPORT_SYMBOL(boot_cpu_data); #ifdef CONFIG_PA8X00 -int _parisc_requires_coherency __read_mostly; +int _parisc_requires_coherency __ro_after_init; EXPORT_SYMBOL(_parisc_requires_coherency); #endif @@ -242,6 +228,7 @@ static int __init processor_probe(struct parisc_device *dev) void __init collect_boot_cpu_data(void) { unsigned long cr16_seed; + char orig_prod_num[64], current_prod_num[64], serial_no[64]; memset(&boot_cpu_data, 0, sizeof(boot_cpu_data)); @@ -301,6 +288,15 @@ void __init collect_boot_cpu_data(void) _parisc_requires_coherency = (boot_cpu_data.cpu_type == mako) || (boot_cpu_data.cpu_type == mako2); #endif + + if (pdc_model_platform_info(orig_prod_num, current_prod_num, serial_no) == PDC_OK) { + printk(KERN_INFO "product %s, original product %s, S/N: %s\n", + current_prod_num[0] ? current_prod_num : "n/a", + orig_prod_num, serial_no); + add_device_randomness(orig_prod_num, strlen(orig_prod_num)); + add_device_randomness(current_prod_num, strlen(current_prod_num)); + add_device_randomness(serial_no, strlen(serial_no)); + } } diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c index 0964c236e3e5..a3d2fb4e6dd2 100644 --- a/arch/parisc/kernel/ptrace.c +++ b/arch/parisc/kernel/ptrace.c @@ -789,3 +789,38 @@ const char *regs_query_register_name(unsigned int offset) return roff->name; return NULL; } + +/** + * regs_within_kernel_stack() - check the address in the stack + * @regs: pt_regs which contains kernel stack pointer. + * @addr: address which is checked. + * + * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). + * If @addr is within the kernel stack, it returns true. If not, returns false. + */ +int regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr) +{ + return ((addr & ~(THREAD_SIZE - 1)) == + (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); +} + +/** + * regs_get_kernel_stack_nth() - get Nth entry of the stack + * @regs: pt_regs which contains kernel stack pointer. + * @n: stack entry number. + * + * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which + * is specified by @regs. If the @n th entry is NOT in the kernel stack, + * this returns 0. + */ +unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n) +{ + unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); + + addr -= n; + + if (!regs_within_kernel_stack(regs, (unsigned long)addr)) + return 0; + + return *addr; +} diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c index f2cf86ac279b..53a21ce927de 100644 --- a/arch/parisc/kernel/setup.c +++ b/arch/parisc/kernel/setup.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Initial setup-routines for HP 9000 based hardware. * @@ -9,21 +10,6 @@ * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> * * Initial PA-RISC Version: 04-23-1999 by Helge Deller - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ #include <linux/kernel.h> @@ -40,6 +26,7 @@ #include <linux/sched/clock.h> #include <linux/start_kernel.h> +#include <asm/cacheflush.h> #include <asm/processor.h> #include <asm/sections.h> #include <asm/pdc.h> @@ -342,6 +329,12 @@ static int __init parisc_init(void) boot_cpu_data.cpu_hz / 1000000, boot_cpu_data.cpu_hz % 1000000 ); +#if defined(CONFIG_64BIT) && defined(CONFIG_SMP) + /* Don't serialize TLB flushes if we run on one CPU only. */ + if (num_online_cpus() == 1) + pa_serialize_tlb_flushes = 0; +#endif + apply_alternatives_all(); parisc_setup_cache_timing(); @@ -396,6 +389,9 @@ void __init start_parisc(void) int ret, cpunum; struct pdc_coproc_cfg coproc_cfg; + /* check QEMU/SeaBIOS marker in PAGE0 */ + running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); + cpunum = smp_processor_id(); init_cpu_topology(); diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c index e8ef3eb69449..9a5ba57ad94d 100644 --- a/arch/parisc/kernel/signal32.c +++ b/arch/parisc/kernel/signal32.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* Signal support for 32-bit kernel builds * * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> @@ -5,21 +6,6 @@ * * Code was mostly borrowed from kernel/signal.c. * See kernel/signal.c for additional Copyrights. - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/compat.h> diff --git a/arch/parisc/kernel/signal32.h b/arch/parisc/kernel/signal32.h index a271dc0976ce..f166250f2d06 100644 --- a/arch/parisc/kernel/signal32.h +++ b/arch/parisc/kernel/signal32.h @@ -1,20 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2001 Matthew Wilcox <willy at parisc-linux.org> * Copyright (C) 2003 Carlos O'Donell <carlos at parisc-linux.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef _PARISC64_KERNEL_SIGNAL32_H #define _PARISC64_KERNEL_SIGNAL32_H diff --git a/arch/parisc/kernel/smp.c b/arch/parisc/kernel/smp.c index 5e26dbede5fc..cbd074ba22da 100644 --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* ** SMP Support ** @@ -11,10 +12,6 @@ ** Thanks to John Curry and Ullas Ponnadi. I learned a lot from their work. ** -grant (1/12/2001) ** -** This program is free software; you can redistribute it and/or modify -** it under the terms of the GNU General Public License as published by -** the Free Software Foundation; either version 2 of the License, or -** (at your option) any later version. */ #include <linux/types.h> #include <linux/spinlock.h> @@ -155,6 +152,7 @@ ipi_interrupt(int irq, void *dev_id) case IPI_CALL_FUNC: smp_debug(100, KERN_DEBUG "CPU%d IPI_CALL_FUNC\n", this_cpu); + inc_irq_stat(irq_call_count); generic_smp_call_function_interrupt(); break; diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c index ec5835e83a7a..34bf6d6bf6e8 100644 --- a/arch/parisc/kernel/stacktrace.c +++ b/arch/parisc/kernel/stacktrace.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Stack trace management functions * @@ -29,22 +30,17 @@ static void dump_trace(struct task_struct *task, struct stack_trace *trace) } } - /* * Save stack-backtrace addresses into a stack_trace buffer. */ void save_stack_trace(struct stack_trace *trace) { dump_trace(current, trace); - if (trace->nr_entries < trace->max_entries) - trace->entries[trace->nr_entries++] = ULONG_MAX; } EXPORT_SYMBOL_GPL(save_stack_trace); void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) { dump_trace(tsk, trace); - if (trace->nr_entries < trace->max_entries) - trace->entries[trace->nr_entries++] = ULONG_MAX; } EXPORT_SYMBOL_GPL(save_stack_trace_tsk); diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index 376ea0d1b275..5d458a44b09c 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PARISC specific syscalls @@ -6,21 +7,6 @@ * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org> * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org> * Copyright (C) 1999-2014 Helge Deller <deller@gmx.de> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/uaccess.h> @@ -86,7 +72,8 @@ static unsigned long mmap_upper_limit(struct rlimit *rlim_stack) stack_base = STACK_SIZE_MAX; /* Add space for stack randomization. */ - stack_base += (STACK_RND_MASK << PAGE_SHIFT); + if (current->flags & PF_RANDOMIZE) + stack_base += (STACK_RND_MASK << PAGE_SHIFT); return PAGE_ALIGN(STACK_TOP - stack_base); } diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S index 4f77bd9be66b..97ac707c6bff 100644 --- a/arch/parisc/kernel/syscall.S +++ b/arch/parisc/kernel/syscall.S @@ -48,7 +48,7 @@ registers). */ #define KILL_INSN break 0,0 - .level LEVEL + .level PA_ASM_LEVEL .text @@ -640,7 +640,10 @@ cas_action: sub,<> %r28, %r25, %r0 2: stw %r24, 0(%r26) /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) #if ENABLE_LWS_DEBUG /* Clear thread register indicator */ @@ -655,7 +658,10 @@ cas_action: 3: /* Error occurred on load or store */ /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) #if ENABLE_LWS_DEBUG stw %r0, 4(%sr2,%r20) @@ -857,7 +863,10 @@ cas2_action: cas2_end: /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) /* Enable interrupts */ ssm PSW_SM_I, %r0 @@ -868,7 +877,10 @@ cas2_end: 22: /* Error occurred on load or store */ /* Free lock */ - sync +#ifdef CONFIG_SMP +98: LDCW 0(%sr2,%r20), %r1 /* Barrier */ +99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, INSN_NOP) +#endif stw %r20, 0(%sr2,%r20) ssm PSW_SM_I, %r0 ldo 1(%r0),%r28 diff --git a/arch/parisc/kernel/syscalls/syscall.tbl b/arch/parisc/kernel/syscalls/syscall.tbl index 9bbd2f9f56c8..c9e377d59232 100644 --- a/arch/parisc/kernel/syscalls/syscall.tbl +++ b/arch/parisc/kernel/syscalls/syscall.tbl @@ -20,7 +20,8 @@ 10 common unlink sys_unlink 11 common execve sys_execve compat_sys_execve 12 common chdir sys_chdir -13 common time sys_time compat_sys_time +13 32 time sys_time32 +13 64 time sys_time 14 common mknod sys_mknod 15 common chmod sys_chmod 16 common lchown sys_lchown @@ -32,12 +33,14 @@ 22 common bind sys_bind 23 common setuid sys_setuid 24 common getuid sys_getuid -25 common stime sys_stime compat_sys_stime +25 32 stime sys_stime32 +25 64 stime sys_stime 26 common ptrace sys_ptrace compat_sys_ptrace 27 common alarm sys_alarm 28 common fstat sys_newfstat compat_sys_newfstat 29 common pause sys_pause -30 common utime sys_utime compat_sys_utime +30 32 utime sys_utime32 +30 64 utime sys_utime 31 common connect sys_connect 32 common listen sys_listen 33 common access sys_access @@ -133,7 +136,8 @@ 121 common setdomainname sys_setdomainname 122 common sendfile sys_sendfile compat_sys_sendfile 123 common recvfrom sys_recvfrom -124 common adjtimex sys_adjtimex compat_sys_adjtimex +124 32 adjtimex sys_adjtimex_time32 +124 64 adjtimex sys_adjtimex 125 common mprotect sys_mprotect 126 common sigprocmask sys_sigprocmask compat_sys_sigprocmask # 127 was create_module @@ -171,8 +175,10 @@ 158 common sched_yield sys_sched_yield 159 common sched_get_priority_max sys_sched_get_priority_max 160 common sched_get_priority_min sys_sched_get_priority_min -161 common sched_rr_get_interval sys_sched_rr_get_interval compat_sys_sched_rr_get_interval -162 common nanosleep sys_nanosleep compat_sys_nanosleep +161 32 sched_rr_get_interval sys_sched_rr_get_interval_time32 +161 64 sched_rr_get_interval sys_sched_rr_get_interval +162 32 nanosleep sys_nanosleep_time32 +162 64 nanosleep sys_nanosleep 163 common mremap sys_mremap 164 common setresuid sys_setresuid 165 common getresuid sys_getresuid @@ -187,7 +193,8 @@ 174 common rt_sigaction sys_rt_sigaction compat_sys_rt_sigaction 175 common rt_sigprocmask sys_rt_sigprocmask compat_sys_rt_sigprocmask 176 common rt_sigpending sys_rt_sigpending compat_sys_rt_sigpending -177 common rt_sigtimedwait sys_rt_sigtimedwait compat_sys_rt_sigtimedwait +177 32 rt_sigtimedwait sys_rt_sigtimedwait_time32 compat_sys_rt_sigtimedwait_time32 +177 64 rt_sigtimedwait sys_rt_sigtimedwait 178 common rt_sigqueueinfo sys_rt_sigqueueinfo compat_sys_rt_sigqueueinfo 179 common rt_sigsuspend sys_rt_sigsuspend compat_sys_rt_sigsuspend 180 common chown sys_chown @@ -223,14 +230,16 @@ 207 64 readahead sys_readahead 208 common tkill sys_tkill 209 common sendfile64 sys_sendfile64 compat_sys_sendfile64 -210 common futex sys_futex compat_sys_futex +210 32 futex sys_futex_time32 +210 64 futex sys_futex 211 common sched_setaffinity sys_sched_setaffinity compat_sys_sched_setaffinity 212 common sched_getaffinity sys_sched_getaffinity compat_sys_sched_getaffinity # 213 was set_thread_area # 214 was get_thread_area 215 common io_setup sys_io_setup compat_sys_io_setup 216 common io_destroy sys_io_destroy -217 common io_getevents sys_io_getevents compat_sys_io_getevents +217 32 io_getevents sys_io_getevents_time32 +217 64 io_getevents sys_io_getevents 218 common io_submit sys_io_submit compat_sys_io_submit 219 common io_cancel sys_io_cancel # 220 was alloc_hugepages @@ -241,11 +250,14 @@ 225 common epoll_ctl sys_epoll_ctl 226 common epoll_wait sys_epoll_wait 227 common remap_file_pages sys_remap_file_pages -228 common semtimedop sys_semtimedop compat_sys_semtimedop +228 32 semtimedop sys_semtimedop_time32 +228 64 semtimedop sys_semtimedop 229 common mq_open sys_mq_open compat_sys_mq_open 230 common mq_unlink sys_mq_unlink -231 common mq_timedsend sys_mq_timedsend compat_sys_mq_timedsend -232 common mq_timedreceive sys_mq_timedreceive compat_sys_mq_timedreceive +231 32 mq_timedsend sys_mq_timedsend_time32 +231 64 mq_timedsend sys_mq_timedsend +232 32 mq_timedreceive sys_mq_timedreceive_time32 +232 64 mq_timedreceive sys_mq_timedreceive 233 common mq_notify sys_mq_notify compat_sys_mq_notify 234 common mq_getsetattr sys_mq_getsetattr compat_sys_mq_getsetattr 235 common waitid sys_waitid compat_sys_waitid @@ -265,14 +277,20 @@ 248 common lremovexattr sys_lremovexattr 249 common fremovexattr sys_fremovexattr 250 common timer_create sys_timer_create compat_sys_timer_create -251 common timer_settime sys_timer_settime compat_sys_timer_settime -252 common timer_gettime sys_timer_gettime compat_sys_timer_gettime +251 32 timer_settime sys_timer_settime32 +251 64 timer_settime sys_timer_settime +252 32 timer_gettime sys_timer_gettime32 +252 64 timer_gettime sys_timer_gettime 253 common timer_getoverrun sys_timer_getoverrun 254 common timer_delete sys_timer_delete -255 common clock_settime sys_clock_settime compat_sys_clock_settime -256 common clock_gettime sys_clock_gettime compat_sys_clock_gettime -257 common clock_getres sys_clock_getres compat_sys_clock_getres -258 common clock_nanosleep sys_clock_nanosleep compat_sys_clock_nanosleep +255 32 clock_settime sys_clock_settime32 +255 64 clock_settime sys_clock_settime +256 32 clock_gettime sys_clock_gettime32 +256 64 clock_gettime sys_clock_gettime +257 32 clock_getres sys_clock_getres_time32 +257 64 clock_getres sys_clock_getres +258 32 clock_nanosleep sys_clock_nanosleep_time32 +258 64 clock_nanosleep sys_clock_nanosleep 259 common tgkill sys_tgkill 260 common mbind sys_mbind compat_sys_mbind 261 common get_mempolicy sys_get_mempolicy compat_sys_get_mempolicy @@ -287,13 +305,16 @@ 270 common inotify_add_watch sys_inotify_add_watch 271 common inotify_rm_watch sys_inotify_rm_watch 272 common migrate_pages sys_migrate_pages -273 common pselect6 sys_pselect6 compat_sys_pselect6 -274 common ppoll sys_ppoll compat_sys_ppoll +273 32 pselect6 sys_pselect6_time32 compat_sys_pselect6_time32 +273 64 pselect6 sys_pselect6 +274 32 ppoll sys_ppoll_time32 compat_sys_ppoll_time32 +274 64 ppoll sys_ppoll 275 common openat sys_openat compat_sys_openat 276 common mkdirat sys_mkdirat 277 common mknodat sys_mknodat 278 common fchownat sys_fchownat -279 common futimesat sys_futimesat compat_sys_futimesat +279 32 futimesat sys_futimesat_time32 +279 64 futimesat sys_futimesat 280 common fstatat64 sys_fstatat64 281 common unlinkat sys_unlinkat 282 common renameat sys_renameat @@ -316,15 +337,18 @@ 298 common statfs64 sys_statfs64 compat_sys_statfs64 299 common fstatfs64 sys_fstatfs64 compat_sys_fstatfs64 300 common kexec_load sys_kexec_load compat_sys_kexec_load -301 common utimensat sys_utimensat compat_sys_utimensat +301 32 utimensat sys_utimensat_time32 +301 64 utimensat sys_utimensat 302 common signalfd sys_signalfd compat_sys_signalfd # 303 was timerfd 304 common eventfd sys_eventfd 305 32 fallocate parisc_fallocate 305 64 fallocate sys_fallocate 306 common timerfd_create sys_timerfd_create -307 common timerfd_settime sys_timerfd_settime compat_sys_timerfd_settime -308 common timerfd_gettime sys_timerfd_gettime compat_sys_timerfd_gettime +307 32 timerfd_settime sys_timerfd_settime32 +307 64 timerfd_settime sys_timerfd_settime +308 32 timerfd_gettime sys_timerfd_gettime32 +308 64 timerfd_gettime sys_timerfd_gettime 309 common signalfd4 sys_signalfd4 compat_sys_signalfd4 310 common eventfd2 sys_eventfd2 311 common epoll_create1 sys_epoll_create1 @@ -335,12 +359,14 @@ 316 common pwritev sys_pwritev compat_sys_pwritev 317 common rt_tgsigqueueinfo sys_rt_tgsigqueueinfo compat_sys_rt_tgsigqueueinfo 318 common perf_event_open sys_perf_event_open -319 common recvmmsg sys_recvmmsg compat_sys_recvmmsg +319 32 recvmmsg sys_recvmmsg_time32 compat_sys_recvmmsg_time32 +319 64 recvmmsg sys_recvmmsg 320 common accept4 sys_accept4 321 common prlimit64 sys_prlimit64 322 common fanotify_init sys_fanotify_init 323 common fanotify_mark sys_fanotify_mark sys32_fanotify_mark -324 common clock_adjtime sys_clock_adjtime compat_sys_clock_adjtime +324 32 clock_adjtime sys_clock_adjtime32 +324 64 clock_adjtime sys_clock_adjtime 325 common name_to_handle_at sys_name_to_handle_at 326 common open_by_handle_at sys_open_by_handle_at compat_sys_open_by_handle_at 327 common syncfs sys_syncfs @@ -352,7 +378,8 @@ 333 common finit_module sys_finit_module 334 common sched_setattr sys_sched_setattr 335 common sched_getattr sys_sched_getattr -336 common utimes sys_utimes compat_sys_utimes +336 32 utimes sys_utimes_time32 +336 64 utimes sys_utimes 337 common renameat2 sys_renameat2 338 common seccomp sys_seccomp 339 common getrandom sys_getrandom @@ -366,4 +393,40 @@ 347 common preadv2 sys_preadv2 compat_sys_preadv2 348 common pwritev2 sys_pwritev2 compat_sys_pwritev2 349 common statx sys_statx -350 common io_pgetevents sys_io_pgetevents compat_sys_io_pgetevents +350 32 io_pgetevents sys_io_pgetevents_time32 compat_sys_io_pgetevents +350 64 io_pgetevents sys_io_pgetevents +351 common pkey_mprotect sys_pkey_mprotect +352 common pkey_alloc sys_pkey_alloc +353 common pkey_free sys_pkey_free +354 common rseq sys_rseq +# 355 through 402 are unassigned to sync up with generic numbers +403 32 clock_gettime64 sys_clock_gettime sys_clock_gettime +404 32 clock_settime64 sys_clock_settime sys_clock_settime +405 32 clock_adjtime64 sys_clock_adjtime sys_clock_adjtime +406 32 clock_getres_time64 sys_clock_getres sys_clock_getres +407 32 clock_nanosleep_time64 sys_clock_nanosleep sys_clock_nanosleep +408 32 timer_gettime64 sys_timer_gettime sys_timer_gettime +409 32 timer_settime64 sys_timer_settime sys_timer_settime +410 32 timerfd_gettime64 sys_timerfd_gettime sys_timerfd_gettime +411 32 timerfd_settime64 sys_timerfd_settime sys_timerfd_settime +412 32 utimensat_time64 sys_utimensat sys_utimensat +413 32 pselect6_time64 sys_pselect6 compat_sys_pselect6_time64 +414 32 ppoll_time64 sys_ppoll compat_sys_ppoll_time64 +416 32 io_pgetevents_time64 sys_io_pgetevents sys_io_pgetevents +417 32 recvmmsg_time64 sys_recvmmsg compat_sys_recvmmsg_time64 +418 32 mq_timedsend_time64 sys_mq_timedsend sys_mq_timedsend +419 32 mq_timedreceive_time64 sys_mq_timedreceive sys_mq_timedreceive +420 32 semtimedop_time64 sys_semtimedop sys_semtimedop +421 32 rt_sigtimedwait_time64 sys_rt_sigtimedwait compat_sys_rt_sigtimedwait_time64 +422 32 futex_time64 sys_futex sys_futex +423 32 sched_rr_get_interval_time64 sys_sched_rr_get_interval sys_sched_rr_get_interval +424 common pidfd_send_signal sys_pidfd_send_signal +425 common io_uring_setup sys_io_uring_setup +426 common io_uring_enter sys_io_uring_enter +427 common io_uring_register sys_io_uring_register +428 common open_tree sys_open_tree +429 common move_mount sys_move_mount +430 common fsopen sys_fsopen +431 common fsconfig sys_fsconfig +432 common fsmount sys_fsmount +433 common fspick sys_fspick diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index a1e772f909cb..04508158815c 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -40,7 +40,7 @@ #include <linux/timex.h> -static unsigned long clocktick __read_mostly; /* timer cycles per tick */ +static unsigned long clocktick __ro_after_init; /* timer cycles per tick */ /* * We keep time on PA-RISC Linux by using the Interval Timer which is diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c index 472a818e8c17..096e319adeb3 100644 --- a/arch/parisc/kernel/traps.c +++ b/arch/parisc/kernel/traps.c @@ -42,6 +42,8 @@ #include <asm/unwind.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> +#include <linux/kgdb.h> +#include <linux/kprobes.h> #include "../math-emu/math-emu.h" /* for handle_fpe() */ @@ -218,7 +220,7 @@ void die_if_kernel(char *str, struct pt_regs *regs, long err) return; } - oops_in_progress = 1; + bust_spinlocks(1); oops_enter(); @@ -293,6 +295,22 @@ static void handle_break(struct pt_regs *regs) (tt == BUG_TRAP_TYPE_NONE) ? 9 : 0); } +#ifdef CONFIG_KPROBES + if (unlikely(iir == PARISC_KPROBES_BREAK_INSN)) { + parisc_kprobe_break_handler(regs); + return; + } + +#endif + +#ifdef CONFIG_KGDB + if (unlikely(iir == PARISC_KGDB_COMPILED_BREAK_INSN || + iir == PARISC_KGDB_BREAK_INSN)) { + kgdb_handle_exception(9, SIGTRAP, 0, regs); + return; + } +#endif + if (unlikely(iir != GDB_BREAK_INSN)) parisc_printk_ratelimited(0, regs, KERN_DEBUG "break %d,%d: pid=%d command='%s'\n", @@ -396,7 +414,7 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o { static DEFINE_SPINLOCK(terminate_lock); - oops_in_progress = 1; + bust_spinlocks(1); set_eiem(0); local_irq_disable(); @@ -518,6 +536,19 @@ void notrace handle_interruption(int code, struct pt_regs *regs) case 3: /* Recovery counter trap */ regs->gr[0] &= ~PSW_R; + +#ifdef CONFIG_KPROBES + if (parisc_kprobe_ss_handler(regs)) + return; +#endif + +#ifdef CONFIG_KGDB + if (kgdb_single_step) { + kgdb_handle_exception(0, SIGTRAP, 0, regs); + return; + } +#endif + if (user_space(regs)) handle_gdb_break(regs, TRAP_TRACE); /* else this must be the start of a syscall - just let it run */ diff --git a/arch/parisc/kernel/unaligned.c b/arch/parisc/kernel/unaligned.c index 932bfc0b7cd8..30161b7c9ac2 100644 --- a/arch/parisc/kernel/unaligned.c +++ b/arch/parisc/kernel/unaligned.c @@ -1,23 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Unaligned memory access handler * * Copyright (C) 2001 Randolph Chung <tausq@debian.org> * Significantly tweaked by LaMont Jones <lamont@debian.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * */ #include <linux/jiffies.h> diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c index 2d14f17838d2..87ae476d1c4f 100644 --- a/arch/parisc/kernel/unwind.c +++ b/arch/parisc/kernel/unwind.c @@ -40,7 +40,7 @@ static DEFINE_SPINLOCK(unwind_lock); * we can call unwind_init as early in the bootup process as * possible (before the slab allocator is initialized) */ -static struct unwind_table kernel_unwind_table __read_mostly; +static struct unwind_table kernel_unwind_table __ro_after_init; static LIST_HEAD(unwind_tables); static inline const struct unwind_table_entry * diff --git a/arch/parisc/kernel/vmlinux.lds.S b/arch/parisc/kernel/vmlinux.lds.S index c3b1b9c24ede..cd33b4feacb1 100644 --- a/arch/parisc/kernel/vmlinux.lds.S +++ b/arch/parisc/kernel/vmlinux.lds.S @@ -35,6 +35,15 @@ OUTPUT_FORMAT("elf64-hppa-linux") OUTPUT_ARCH(hppa:hppa2.0w) #endif +#define EXIT_TEXT_SECTIONS() .exit.text : { EXIT_TEXT } +#if !defined(CONFIG_64BIT) || defined(CONFIG_MLONGCALLS) +#define MLONGCALL_KEEP(x) +#define MLONGCALL_DISCARD(x) x +#else +#define MLONGCALL_KEEP(x) x +#define MLONGCALL_DISCARD(x) +#endif + ENTRY(parisc_kernel_start) #ifndef CONFIG_64BIT jiffies = jiffies_64 + 4; @@ -47,15 +56,11 @@ SECTIONS __init_begin = .; HEAD_TEXT_SECTION - INIT_TEXT_SECTION(8) + MLONGCALL_DISCARD(INIT_TEXT_SECTION(8)) . = ALIGN(PAGE_SIZE); INIT_DATA_SECTION(PAGE_SIZE) - /* we have to discard exit text and such at runtime, not link time */ - .exit.text : - { - EXIT_TEXT - } + MLONGCALL_DISCARD(EXIT_TEXT_SECTIONS()) .exit.data : { EXIT_DATA @@ -73,11 +78,12 @@ SECTIONS _text = .; /* Text and read-only data */ _stext = .; + MLONGCALL_KEEP(INIT_TEXT_SECTION(8)) .text ALIGN(PAGE_SIZE) : { TEXT_TEXT + LOCK_TEXT SCHED_TEXT CPUIDLE_TEXT - LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT @@ -92,6 +98,7 @@ SECTIONS *(.lock.text) /* out-of-line lock text */ *(.gnu.warning) } + MLONGCALL_KEEP(EXIT_TEXT_SECTIONS()) . = ALIGN(PAGE_SIZE); _etext = .; /* End of text section */ |