From d8e99133eb4a8d09dcbf71f7277dc948d3413227 Mon Sep 17 00:00:00 2001 From: Austin Kim Date: Sat, 4 Apr 2026 18:42:40 -0600 Subject: [PATCH] riscv: export kaslr offset and satp in VMCOREINFO ELF notes The following options are required by the kdump crash utility for RISC-V based vmcore file: - kaslr: If the vmcore is generated from a KASLR-enabled Linux kernel, the KASLR offset is required for the crash utility to load the vmcore. Without the proper kaslr option, the crash utility fails to load the vmcore file. - satp: The exact root page table address helps determine the correct base PGD address. With this patch, RISC-V VMCOREINFO ELF notes now include both kaslr and satp information. Signed-off-by: Austin Kim Link: https://patch.msgid.link/aYwKUE3ZzN7/ZY/A@adminpc-PowerEdge-R7525 Signed-off-by: Paul Walmsley --- arch/riscv/kernel/vmcore_info.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/riscv/kernel/vmcore_info.c b/arch/riscv/kernel/vmcore_info.c index d5e448aa90e7..682ba423cf20 100644 --- a/arch/riscv/kernel/vmcore_info.c +++ b/arch/riscv/kernel/vmcore_info.c @@ -3,6 +3,11 @@ #include #include +static inline u64 get_satp_value(void) +{ + return csr_read(CSR_SATP); +} + void arch_crash_save_vmcoreinfo(void) { VMCOREINFO_NUMBER(phys_ram_base); @@ -27,5 +32,7 @@ void arch_crash_save_vmcoreinfo(void) #else vmcoreinfo_append_str("NUMBER(va_kernel_pa_offset)=0x%lx\n", kernel_map.va_kernel_pa_offset); + vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset()); + vmcoreinfo_append_str("NUMBER(satp)=0x%llx\n", get_satp_value()); #endif }