mirror of
https://github.com/hardkernel/kernel_common_drivers.git
synced 2026-06-25 12:03:48 +09:00
Jian Hu
68bc14b23e
PD#SWPL-185687 Problem: there is panic when envp_init stores over 32 members Kernel panic - not syncing: Too many boot env vars at `reboot_mode=normal' CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.180-rksec-1.0 #2 Hardware name: Generic DT based system [<b020a1b8>] show_stack+0x10/0x14 [<b0cbd7b4>] dump_stack+0x8c/0xa8 [<b0cad7a4>] panic+0x104/0x304 [<b1100b84>] start_kernel+0xa4/0x42c [<b11004a4>] _sinittext+0x44/0x48 Solution: set __setup return value as 1 to avoid envp_init full Verify: t5w Test: t5w Change-Id: Ie0f5ada11318ab509bf7bd914e2af53213250f00 Signed-off-by: Jian Hu <jian.hu@amlogic.com> Signed-off-by: Dezhen Wang <dezhen.wang@amlogic.com>
360 lines
10 KiB
C
360 lines
10 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2019 Amlogic, Inc. All rights reserved.
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*/
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/errno.h>
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#include <asm/sections.h>
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#include <linux/sizes.h>
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#ifdef CONFIG_RISCV
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#include <asm/pgtable.h>
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#else
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#include <asm/memory.h>
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#endif
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#include <linux/init.h>
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#include <linux/initrd.h>
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#include <linux/gfp.h>
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#include <linux/memblock.h>
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#include <linux/dma-mapping.h>
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#include <linux/vmalloc.h>
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#include <linux/mm.h>
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#include <linux/amlogic/mem_debug.h>
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#include <linux/crash_dump.h>
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#ifdef CONFIG_ARM64
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#include <asm/boot.h>
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#endif
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#include <asm/fixmap.h>
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#include <linux/kasan.h>
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#include <linux/seq_file.h>
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#ifdef CONFIG_HIGHMEM
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#include <asm/highmem.h>
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#endif
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#ifdef CONFIG_AMLOGIC_CMA
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#include <linux/amlogic/aml_cma.h>
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#endif
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#ifdef CONFIG_AMLOGIC_VMAP
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#include <linux/amlogic/vmap_stack.h>
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#endif
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#if IS_MODULE(CONFIG_AMLOGIC_MEM_DEBUG)
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#include <linux/module.h>
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#endif
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static int pagemap_en;
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unsigned long mlock_fault_size;
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void dump_mem_layout(char *buf)
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{
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#define MLK(b, t) b, t, ((t) - (b)) >> 10
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#define MLM(b, t) b, t, ((t) - (b)) >> 20
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#define MLG(b, t) b, t, ((t) - (b)) >> 30
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#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
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#ifdef CONFIG_ARM64
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int pos = 0;
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pos += sprintf(buf + pos, "Virtual kernel memory layout:\n");
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#ifdef CONFIG_KASAN_GENERIC
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pos += sprintf(buf + pos, " kasan : 0x%16lx - 0x%16lx (%6ld GB)\n",
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MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
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#endif
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pos += sprintf(buf + pos, " modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(MODULES_VADDR, MODULES_END));
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pos += sprintf(buf + pos, " vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
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MLG(VMALLOC_START, VMALLOC_END));
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#if IS_MODULE(CONFIG_AMLOGIC_MEM_DEBUG)
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pos += sprintf(buf + pos, " fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK(FIXADDR_START, FIXADDR_TOP));
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pos += sprintf(buf + pos, " PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(PCI_IO_START, PCI_IO_END));
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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pos += sprintf(buf + pos, " vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
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MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
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#endif
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#else
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pos += sprintf(buf + pos, " .text : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(_text, _etext), (unsigned long)__pa_symbol(_text));
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pos += sprintf(buf + pos, " .rodata : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__start_rodata, __init_begin),
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(unsigned long)__pa_symbol(__start_rodata));
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pos += sprintf(buf + pos, " .init : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__init_begin, __init_end),
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(unsigned long)__pa_symbol(__start_rodata));
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pos += sprintf(buf + pos, " .data : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(_sdata, _edata),
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(unsigned long)__pa_symbol(_sdata));
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pos += sprintf(buf + pos, " .bss : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__bss_start, __bss_stop),
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(unsigned long)__pa_symbol(__bss_start));
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pos += sprintf(buf + pos, " fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK(FIXADDR_START, FIXADDR_TOP));
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pos += sprintf(buf + pos, " PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(PCI_IO_START, PCI_IO_END));
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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pos += sprintf(buf + pos, " vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
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MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
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pos += sprintf(buf + pos, " 0x%16lx - 0x%16lx (%6ld MB actual)\n",
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MLM((unsigned long)phys_to_page(memblock_start_of_DRAM()),
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(unsigned long)virt_to_page(high_memory)));
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#endif
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pos += sprintf(buf + pos, " memory : 0x%16lx - 0x%16lx (%6ld MB) 0x%lx\n",
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MLM(__phys_to_virt(memblock_start_of_DRAM()),
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(unsigned long)high_memory), (unsigned long)memblock_start_of_DRAM());
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pos += sprintf(buf + pos, " offset : 0x%lx\n", kaslr_offset());
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#endif
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#elif defined CONFIG_ARM
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sprintf(buf, "Virtual kernel memory layout:\n"
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#ifdef CONFIG_KASAN
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" kasan : 0x%08lx - 0x%08lx (%4ld MB)\n"
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#endif
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#ifdef CONFIG_HAVE_TCM
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" DTCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
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" ITCM : 0x%08lx - 0x%08lx (%4ld kB)\n"
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#endif
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" fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n"
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" vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n"
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" lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n"
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#ifdef CONFIG_HIGHMEM
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" pkmap : 0x%08lx - 0x%08lx (%4ld MB)\n"
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#endif
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#ifdef CONFIG_MODULES
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" modules : 0x%08lx - 0x%08lx (%4ld MB)\n"
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#endif
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" .text : 0x%px" " - 0x%px" " (%4td kB)\n"
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" .init : 0x%px" " - 0x%px" " (%4td kB)\n"
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" .data : 0x%px" " - 0x%px" " (%4td kB)\n"
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" .bss : 0x%px" " - 0x%px" " (%4td kB)\n",
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#ifdef CONFIG_KASAN
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MLM(KASAN_SHADOW_START, KASAN_SHADOW_END),
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#endif
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#ifdef CONFIG_HAVE_TCM
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MLK(DTCM_OFFSET, (unsigned long) dtcm_end),
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MLK(ITCM_OFFSET, (unsigned long) itcm_end),
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#endif
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MLK(FIXADDR_START, FIXADDR_END),
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MLM(VMALLOC_START, VMALLOC_END),
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MLM(PAGE_OFFSET, (unsigned long)high_memory),
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#ifdef CONFIG_HIGHMEM
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MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
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(PAGE_SIZE)),
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#endif
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#ifdef CONFIG_MODULES
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MLM(MODULES_VADDR, MODULES_END),
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#endif
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MLK_ROUNDUP(_text, _etext),
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MLK_ROUNDUP(__init_begin, __init_end),
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MLK_ROUNDUP(_sdata, _edata),
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MLK_ROUNDUP(__bss_start, __bss_stop));
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#elif defined CONFIG_RISCV
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int pos = 0;
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pos += sprintf(buf + pos, "Virtual kernel memory layout:\n");
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pos += sprintf(buf + pos, " fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
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MLK(FIXADDR_START, FIXADDR_TOP));
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pos += sprintf(buf + pos, " PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(PCI_IO_START, PCI_IO_END));
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#ifdef CONFIG_SPARSEMEM_VMEMMAP
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pos += sprintf(buf + pos, " vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
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MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
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pos += sprintf(buf + pos, " 0x%16lx - 0x%16lx (%6ld MB actual)\n",
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MLM((unsigned long)phys_to_page(memblock_start_of_DRAM()),
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(unsigned long)virt_to_page(high_memory)));
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#endif
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pos += sprintf(buf + pos, " vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
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MLG(VMALLOC_START, VMALLOC_START + VMALLOC_SIZE));
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pos += sprintf(buf + pos, " memory : 0x%16lx - 0x%16lx (%6ld MB) 0x%lx\n",
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MLM(PAGE_OFFSET, (unsigned long)high_memory),
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(unsigned long)memblock_start_of_DRAM());
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pos += sprintf(buf + pos, " modules : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(MODULES_VADDR, MODULES_END));
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pos += sprintf(buf + pos, " kernel : 0x%16lx - 0x%16lx (%6ld MB)\n",
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MLM(KERNEL_LINK_ADDR, ADDRESS_SPACE_END));
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pos += sprintf(buf + pos, " .text : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(_text, _etext), (unsigned long)__pa_symbol(_text));
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pos += sprintf(buf + pos, " .init : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__init_begin, __init_end),
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(unsigned long)__pa_symbol(__init_begin));
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pos += sprintf(buf + pos, " .rodata : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__start_rodata, __end_rodata),
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(unsigned long)__pa_symbol(__start_rodata));
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pos += sprintf(buf + pos, " .data : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(_data, _edata),
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(unsigned long)__pa_symbol(_data));
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pos += sprintf(buf + pos, " .bss : 0x%px" " - 0x%px" " (%6ld KB) 0x%lx\n",
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MLK_ROUNDUP(__bss_start, __bss_stop),
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(unsigned long)__pa_symbol(__bss_start));
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#endif
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}
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static int mdebug_show(struct seq_file *m, void *arg)
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{
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char *buf = kmalloc(4096, GFP_KERNEL);
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if (!buf) {
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pr_err("%s failed\n", __func__);
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return -1;
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}
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/* update only once */
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dump_mem_layout(buf);
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seq_printf(m, "%s\n", buf);
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pr_info("pagemap_en:%d\n", pagemap_en);
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memset(buf, 0, 4096);
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sprintf(buf, "mlock_fault_size: %ldkb\n", mlock_fault_size * 4);
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seq_printf(m, "%s\n", buf);
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kfree(buf);
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return 0;
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}
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static int mdebug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mdebug_show, NULL);
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}
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int pagemap_enabled(void)
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{
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return pagemap_en;
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}
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#if !IS_MODULE(CONFIG_AMLOGIC_MEM_DEBUG)
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/*
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* These information will auto inject to /proc/meminfo sysfs
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*/
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void arch_report_meminfo(struct seq_file *m)
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{
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#ifdef CONFIG_AMLOGIC_CMA
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seq_printf(m, "DriverCma: %8ld kB\n",
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get_cma_allocated() * (1 << (PAGE_SHIFT - 10)));
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#endif
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#ifdef CONFIG_AMLOGIC_VMAP
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vmap_report_meminfo(m);
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#endif
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}
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static int early_pagemap(char *buf)
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{
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if (!buf)
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return -EINVAL;
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if (!strncmp(buf, "eng", 3) ||
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!strncmp(buf, "userdebug", 9))
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pagemap_en = 1;
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pr_info("%s pagemap for %s build\n",
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pagemap_en ? "enable" : "disable", buf);
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return 1;
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}
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__setup("buildvariant=", early_pagemap);
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#endif
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static ssize_t mdebug_write(struct file *file, const char __user *buffer,
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size_t count, loff_t *ppos)
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{
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char *buf;
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unsigned long arg = 0;
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buf = kmalloc(count, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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if (copy_from_user(buf, buffer, count)) {
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kfree(buf);
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return -EINVAL;
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}
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if (!strncmp(buf, "pagemap_en=", 6)) { /* option for 'pagemap_en=' */
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if (sscanf(buf, "pagemap_en=%ld", &arg) < 0) {
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kfree(buf);
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return -EINVAL;
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}
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pagemap_en = arg ? 1 : 0;
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pr_info("set pagemap_en to %d\n", pagemap_en);
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}
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kfree(buf);
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return count;
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}
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static const struct proc_ops mdebug_ops = {
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.proc_open = mdebug_open,
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.proc_read = seq_read,
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.proc_write = mdebug_write,
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.proc_lseek = seq_lseek,
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.proc_release = single_release,
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};
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static size_t str_end_char(const char *s, size_t count, char c)
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{
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size_t len = count, offset = count;
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while (count--) {
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if (*s == c || *s++ == '\0') {
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offset = len - count;
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break;
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}
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}
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return offset;
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}
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void dump_mem_layout_boot_phase(void)
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{
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char *buf = (void *)__get_free_page(GFP_KERNEL);
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int i = 0, len = 0, offset = 0;
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if (!buf) {
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pr_err("%s alloc buffer failed\n", __func__);
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} else {
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dump_mem_layout(buf);
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len = strlen(buf);
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while (i < len) {
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offset = str_end_char(buf + i, 512, '\n');
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pr_crit("%.*s", offset, buf + i);
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i += offset;
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}
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free_page((unsigned long)buf);
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}
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}
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static int __init memory_debug_init(void)
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{
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struct proc_dir_entry *d_mdebug;
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d_mdebug = proc_create("mem_debug", 0444, NULL, &mdebug_ops);
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if (IS_ERR_OR_NULL(d_mdebug)) {
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pr_err("%s, create proc failed\n", __func__);
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return -1;
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}
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return 0;
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}
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#if IS_MODULE(CONFIG_AMLOGIC_MEM_DEBUG)
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static int __init mem_debug_module_init(void)
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{
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memory_debug_init();
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dump_mem_layout_boot_phase();
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return 0;
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}
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static void __exit mem_debug_module_exit(void)
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{
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}
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module_init(mem_debug_module_init);
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module_exit(mem_debug_module_exit);
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MODULE_LICENSE("GPL v2");
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#else
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rootfs_initcall(memory_debug_init);
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#endif
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