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The crash utility uses va_kernel_pa_offset to translate virtual addresses. This is incorrect in the case of XIP kernel, because va_kernel_pa_offset is not the virtual-physical address offset (yes, the name is misleading; this variable will be removed for XIP in a following commit). Stop exporting this variable for XIP kernel. The replacement is to be determined, note it as a TODO for now. Signed-off-by: Nam Cao <namcao@linutronix.de> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Link: https://lore.kernel.org/r/8f8760d3f9a11af4ea0acbc247e4f49ff5d317e9.1717789719.git.namcao@linutronix.de Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/vmcore_info.h>
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#include <linux/pagemap.h>
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void arch_crash_save_vmcoreinfo(void)
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{
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VMCOREINFO_NUMBER(phys_ram_base);
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vmcoreinfo_append_str("NUMBER(PAGE_OFFSET)=0x%lx\n", PAGE_OFFSET);
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vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END);
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#ifdef CONFIG_MMU
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VMCOREINFO_NUMBER(VA_BITS);
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vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START);
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vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END);
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#ifdef CONFIG_64BIT
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vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR);
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vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END);
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#endif
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#endif
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vmcoreinfo_append_str("NUMBER(KERNEL_LINK_ADDR)=0x%lx\n", KERNEL_LINK_ADDR);
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#ifdef CONFIG_XIP_KERNEL
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/* TODO: Communicate with crash-utility developers on the information to
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* export. The XIP case is more complicated, because the virtual-physical
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* address offset depends on whether the address is in ROM or in RAM.
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*/
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#else
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vmcoreinfo_append_str("NUMBER(va_kernel_pa_offset)=0x%lx\n",
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kernel_map.va_kernel_pa_offset);
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#endif
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}
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