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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/arch/powerpc/kernel/setup-common.c
....@@ -1,13 +1,9 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Common boot and setup code for both 32-bit and 64-bit.
34  * Extracted from arch/powerpc/kernel/setup_64.c.
45  *
56  * Copyright (C) 2001 PPC64 Team, IBM Corp
6
- *
7
- *      This program is free software; you can redistribute it and/or
8
- *      modify it under the terms of the GNU General Public License
9
- *      as published by the Free Software Foundation; either version
10
- *      2 of the License, or (at your option) any later version.
117  */
128 
139 #undef DEBUG
....@@ -35,13 +31,13 @@
3531 #include <linux/memblock.h>
3632 #include <linux/of_platform.h>
3733 #include <linux/hugetlb.h>
34
+#include <linux/pgtable.h>
3835 #include <asm/debugfs.h>
3936 #include <asm/io.h>
4037 #include <asm/paca.h>
4138 #include <asm/prom.h>
4239 #include <asm/processor.h>
4340 #include <asm/vdso_datapage.h>
44
-#include <asm/pgtable.h>
4541 #include <asm/smp.h>
4642 #include <asm/elf.h>
4743 #include <asm/machdep.h>
....@@ -67,6 +63,7 @@
6763 #include <asm/livepatch.h>
6864 #include <asm/mmu_context.h>
6965 #include <asm/cpu_has_feature.h>
66
+#include <asm/kasan.h>
7067 
7168 #include "setup.h"
7269 
....@@ -133,13 +130,11 @@
133130 /* also used by kexec */
134131 void machine_shutdown(void)
135132 {
136
-#ifdef CONFIG_FA_DUMP
137133 	/*
138134 	 * if fadump is active, cleanup the fadump registration before we
139135 	 * shutdown.
140136 	 */
141137 	fadump_cleanup();
142
-#endif
143138 
144139 	if (ppc_md.machine_shutdown)
145140 		ppc_md.machine_shutdown();
....@@ -200,14 +195,15 @@
200195 {
201196 	struct device_node *root;
202197 	const char *model = NULL;
203
-#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
204198 	unsigned long bogosum = 0;
205199 	int i;
206
-	for_each_online_cpu(i)
207
-		bogosum += loops_per_jiffy;
208
-	seq_printf(m, "total bogomips\t: %lu.%02lu\n",
209
-		   bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
210
-#endif /* CONFIG_SMP && CONFIG_PPC32 */
200
+
201
+	if (IS_ENABLED(CONFIG_SMP) && IS_ENABLED(CONFIG_PPC32)) {
202
+		for_each_online_cpu(i)
203
+			bogosum += loops_per_jiffy;
204
+		seq_printf(m, "total bogomips\t: %lu.%02lu\n",
205
+			   bogosum / (500000 / HZ), bogosum / (5000 / HZ) % 100);
206
+	}
211207 	seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
212208 	if (ppc_md.name)
213209 		seq_printf(m, "platform\t: %s\n", ppc_md.name);
....@@ -221,11 +217,10 @@
221217 	if (ppc_md.show_cpuinfo != NULL)
222218 		ppc_md.show_cpuinfo(m);
223219 
224
-#ifdef CONFIG_PPC32
225220 	/* Display the amount of memory */
226
-	seq_printf(m, "Memory\t\t: %d MB\n",
227
-		   (unsigned int)(total_memory / (1024 * 1024)));
228
-#endif
221
+	if (IS_ENABLED(CONFIG_PPC32))
222
+		seq_printf(m, "Memory\t\t: %d MB\n",
223
+			   (unsigned int)(total_memory / (1024 * 1024)));
229224 }
230225 
231226 static int show_cpuinfo(struct seq_file *m, void *v)
....@@ -252,26 +247,24 @@
252247 	else
253248 		seq_printf(m, "unknown (%08x)", pvr);
254249 
255
-#ifdef CONFIG_ALTIVEC
256250 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
257251 		seq_printf(m, ", altivec supported");
258
-#endif /* CONFIG_ALTIVEC */
259252 
260253 	seq_printf(m, "\n");
261254 
262255 #ifdef CONFIG_TAU
263
-	if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
264
-#ifdef CONFIG_TAU_AVERAGE
265
-		/* more straightforward, but potentially misleading */
266
-		seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
267
-			   cpu_temp(cpu_id));
268
-#else
269
-		/* show the actual temp sensor range */
270
-		u32 temp;
271
-		temp = cpu_temp_both(cpu_id);
272
-		seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
273
-			   temp & 0xff, temp >> 16);
274
-#endif
256
+	if (cpu_has_feature(CPU_FTR_TAU)) {
257
+		if (IS_ENABLED(CONFIG_TAU_AVERAGE)) {
258
+			/* more straightforward, but potentially misleading */
259
+			seq_printf(m,  "temperature \t: %u C (uncalibrated)\n",
260
+				   cpu_temp(cpu_id));
261
+		} else {
262
+			/* show the actual temp sensor range */
263
+			u32 temp;
264
+			temp = cpu_temp_both(cpu_id);
265
+			seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
266
+				   temp & 0xff, temp >> 16);
267
+		}
275268 	}
276269 #endif /* CONFIG_TAU */
277270 
....@@ -313,15 +306,12 @@
313306 		}
314307 	} else {
315308 		switch (PVR_VER(pvr)) {
316
-			case 0x0020:	/* 403 family */
317
-				maj = PVR_MAJ(pvr) + 1;
318
-				min = PVR_MIN(pvr);
319
-				break;
320309 			case 0x1008:	/* 740P/750P ?? */
321310 				maj = ((pvr >> 8) & 0xFF) - 1;
322311 				min = pvr & 0xFF;
323312 				break;
324313 			case 0x004e: /* POWER9 bits 12-15 give chip type */
314
+			case 0x0080: /* POWER10 bit 12 gives SMT8/4 */
325315 				maj = (pvr >> 8) & 0x0F;
326316 				min = pvr & 0xFF;
327317 				break;
....@@ -335,11 +325,10 @@
335325 	seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
336326 		   maj, min, PVR_VER(pvr), PVR_REV(pvr));
337327 
338
-#ifdef CONFIG_PPC32
339
-	seq_printf(m, "bogomips\t: %lu.%02lu\n",
340
-		   loops_per_jiffy / (500000/HZ),
341
-		   (loops_per_jiffy / (5000/HZ)) % 100);
342
-#endif
328
+	if (IS_ENABLED(CONFIG_PPC32))
329
+		seq_printf(m, "bogomips\t: %lu.%02lu\n", loops_per_jiffy / (500000 / HZ),
330
+			   (loops_per_jiffy / (5000 / HZ)) % 100);
331
+
343332 	seq_printf(m, "\n");
344333 
345334 	/* If this is the last cpu, print the summary */
....@@ -401,8 +390,8 @@
401390 
402391 #ifdef CONFIG_SMP
403392 
404
-int threads_per_core, threads_per_subcore, threads_shift;
405
-cpumask_t threads_core_mask;
393
+int threads_per_core, threads_per_subcore, threads_shift __read_mostly;
394
+cpumask_t threads_core_mask __read_mostly;
406395 EXPORT_SYMBOL_GPL(threads_per_core);
407396 EXPORT_SYMBOL_GPL(threads_per_subcore);
408397 EXPORT_SYMBOL_GPL(threads_shift);
....@@ -459,9 +448,11 @@
459448 
460449 	DBG("smp_setup_cpu_maps()\n");
461450 
462
-	cpu_to_phys_id = __va(memblock_alloc(nr_cpu_ids * sizeof(u32),
463
-							__alignof__(u32)));
464
-	memset(cpu_to_phys_id, 0, nr_cpu_ids * sizeof(u32));
451
+	cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32),
452
+					__alignof__(u32));
453
+	if (!cpu_to_phys_id)
454
+		panic("%s: Failed to allocate %zu bytes align=0x%zx\n",
455
+		      __func__, nr_cpu_ids * sizeof(u32), __alignof__(u32));
465456 
466457 	for_each_node_by_type(dn, "cpu") {
467458 		const __be32 *intserv;
....@@ -635,7 +626,7 @@
635626 	}
636627 	/* What can we do if we didn't find ? */
637628 	if (machine_id >= &__machine_desc_end) {
638
-		DBG("No suitable machine found !\n");
629
+		pr_err("No suitable machine description found !\n");
639630 		for (;;);
640631 	}
641632 
....@@ -688,7 +679,7 @@
688679 		return ret;
689680 	parent = of_get_parent(np);
690681 	if (parent) {
691
-		if (strcmp(parent->type, "isa") == 0)
682
+		if (of_node_is_type(parent, "isa"))
692683 			ret = 0;
693684 		of_node_put(parent);
694685 	}
....@@ -721,8 +712,28 @@
721712 	.priority = INT_MIN /* may not return; must be done last */
722713 };
723714 
715
+/*
716
+ * Dump out kernel offset information on panic.
717
+ */
718
+static int dump_kernel_offset(struct notifier_block *self, unsigned long v,
719
+			      void *p)
720
+{
721
+	pr_emerg("Kernel Offset: 0x%lx from 0x%lx\n",
722
+		 kaslr_offset(), KERNELBASE);
723
+
724
+	return 0;
725
+}
726
+
727
+static struct notifier_block kernel_offset_notifier = {
728
+	.notifier_call = dump_kernel_offset
729
+};
730
+
724731 void __init setup_panic(void)
725732 {
733
+	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_offset() > 0)
734
+		atomic_notifier_chain_register(&panic_notifier_list,
735
+					       &kernel_offset_notifier);
736
+
726737 	/* PPC64 always does a hard irq disable in its panic handler */
727738 	if (!IS_ENABLED(CONFIG_PPC64) && !ppc_md.panic)
728739 		return;
....@@ -738,23 +749,19 @@
738749  * BUG() in that case.
739750  */
740751 
741
-#ifdef CONFIG_NOT_COHERENT_CACHE
742
-#define KERNEL_COHERENCY	0
743
-#else
744
-#define KERNEL_COHERENCY	1
745
-#endif
752
+#define KERNEL_COHERENCY	(!IS_ENABLED(CONFIG_NOT_COHERENT_CACHE))
746753 
747754 static int __init check_cache_coherency(void)
748755 {
749756 	struct device_node *np;
750757 	const void *prop;
751
-	int devtree_coherency;
758
+	bool devtree_coherency;
752759 
753760 	np = of_find_node_by_path("/");
754761 	prop = of_get_property(np, "coherency-off", NULL);
755762 	of_node_put(np);
756763 
757
-	devtree_coherency = prop ? 0 : 1;
764
+	devtree_coherency = prop ? false : true;
758765 
759766 	if (devtree_coherency != KERNEL_COHERENCY) {
760767 		printk(KERN_ERR
....@@ -777,8 +784,7 @@
777784 static int powerpc_debugfs_init(void)
778785 {
779786 	powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
780
-
781
-	return powerpc_debugfs_root == NULL;
787
+	return 0;
782788 }
783789 arch_initcall(powerpc_debugfs_init);
784790 #endif
....@@ -788,22 +794,9 @@
788794 	pr_info("%s\n", s);
789795 }
790796 
791
-void arch_setup_pdev_archdata(struct platform_device *pdev)
792
-{
793
-	pdev->archdata.dma_mask = DMA_BIT_MASK(32);
794
-	pdev->dev.dma_mask = &pdev->archdata.dma_mask;
795
- 	set_dma_ops(&pdev->dev, &dma_nommu_ops);
796
-}
797
-
798797 static __init void print_system_info(void)
799798 {
800799 	pr_info("-----------------------------------------------------\n");
801
-#ifdef CONFIG_PPC_BOOK3S_64
802
-	pr_info("ppc64_pft_size    = 0x%llx\n", ppc64_pft_size);
803
-#endif
804
-#ifdef CONFIG_PPC_STD_MMU_32
805
-	pr_info("Hash_size         = 0x%lx\n", Hash_size);
806
-#endif
807800 	pr_info("phys_mem_size     = 0x%llx\n",
808801 		(unsigned long long)memblock_phys_mem_size());
809802 
....@@ -823,20 +816,15 @@
823816 	pr_info("mmu_features      = 0x%08x\n", cur_cpu_spec->mmu_features);
824817 #ifdef CONFIG_PPC64
825818 	pr_info("firmware_features = 0x%016lx\n", powerpc_firmware_features);
819
+#ifdef CONFIG_PPC_BOOK3S
820
+	pr_info("vmalloc start     = 0x%lx\n", KERN_VIRT_START);
821
+	pr_info("IO start          = 0x%lx\n", KERN_IO_START);
822
+	pr_info("vmemmap start     = 0x%lx\n", (unsigned long)vmemmap);
823
+#endif
826824 #endif
827825 
828
-#ifdef CONFIG_PPC_BOOK3S_64
829
-	if (htab_address)
830
-		pr_info("htab_address      = 0x%p\n", htab_address);
831
-	if (htab_hash_mask)
832
-		pr_info("htab_hash_mask    = 0x%lx\n", htab_hash_mask);
833
-#endif
834
-#ifdef CONFIG_PPC_STD_MMU_32
835
-	if (Hash)
836
-		pr_info("Hash              = 0x%p\n", Hash);
837
-	if (Hash_mask)
838
-		pr_info("Hash_mask         = 0x%lx\n", Hash_mask);
839
-#endif
826
+	if (!early_radix_enabled())
827
+		print_system_hash_info();
840828 
841829 	if (PHYSICAL_START > 0)
842830 		pr_info("physical_start    = 0x%llx\n",
....@@ -867,6 +855,8 @@
867855  */
868856 void __init setup_arch(char **cmdline_p)
869857 {
858
+	kasan_init();
859
+
870860 	*cmdline_p = boot_command_line;
871861 
872862 	/* Set a half-reasonable default so udelay does something sensible */
....@@ -937,27 +927,17 @@
937927 	/* Reserve large chunks of memory for use by CMA for KVM. */
938928 	kvm_cma_reserve();
939929 
940
-	klp_init_thread_info(&init_thread_info);
930
+	/*  Reserve large chunks of memory for us by CMA for hugetlb */
931
+	gigantic_hugetlb_cma_reserve();
932
+
933
+	klp_init_thread_info(&init_task);
941934 
942935 	init_mm.start_code = (unsigned long)_stext;
943936 	init_mm.end_code = (unsigned long) _etext;
944937 	init_mm.end_data = (unsigned long) _edata;
945938 	init_mm.brk = klimit;
946939 
947
-#ifdef CONFIG_PPC_MM_SLICES
948
-#ifdef CONFIG_PPC64
949
-	if (!radix_enabled())
950
-		init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW_USER64;
951
-#elif defined(CONFIG_PPC_8xx)
952
-	init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW;
953
-#else
954
-#error	"context.addr_limit not initialized."
955
-#endif
956
-#endif
957
-
958
-#ifdef CONFIG_SPAPR_TCE_IOMMU
959940 	mm_iommu_init(&init_mm);
960
-#endif
961941 	irqstack_early_init();
962942 	exc_lvl_early_init();
963943 	emergency_stack_init();
....@@ -966,9 +946,8 @@
966946 
967947 	initmem_init();
968948 
969
-#ifdef CONFIG_DUMMY_CONSOLE
970
-	conswitchp = &dummy_con;
971
-#endif
949
+	early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
950
+
972951 	if (ppc_md.setup_arch)
973952 		ppc_md.setup_arch();
974953 
....@@ -980,10 +959,8 @@
980959 	/* Initialize the MMU context management stuff. */
981960 	mmu_context_init();
982961 
983
-#ifdef CONFIG_PPC64
984962 	/* Interrupt code needs to be 64K-aligned. */
985
-	if ((unsigned long)_stext & 0xffff)
963
+	if (IS_ENABLED(CONFIG_PPC64) && (unsigned long)_stext & 0xffff)
986964 		panic("Kernelbase not 64K-aligned (0x%lx)!\n",
987965 		      (unsigned long)_stext);
988
-#endif
989966 }