Messages in this thread | | | Date | Tue, 25 Jul 2023 09:52:36 +0800 | Subject | Re: [RESEND PATCH -fixes 1/2] riscv: Export va_kernel_pa_offset in vmcoreinfo | From | Xianting Tian <> |
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在 2023/7/24 下午6:09, Song Shuai 写道: > Since RISC-V Linux v6.4, the commit 3335068f8721 ("riscv: Use > PUD/P4D/PGD pages for the linear mapping") changes phys_ram_base > from the physical start of the kernel to the actual start of the DRAM. > > The Crash-utility's VTOP() still uses phys_ram_base and kernel_map.virt_addr > to translate kernel virtual address, that failed the Crash with Linux v6.4 [1]. > > Export kernel_map.va_kernel_pa_offset in vmcoreinfo to help Crash translate > the kernel virtual address correctly. > > Fixes: 3335068f8721 ("riscv: Use PUD/P4D/PGD pages for the linear mapping") > Link: https://lore.kernel.org/linux-riscv/20230724040649.220279-1-suagrfillet@gmail.com/ [1] > Signed-off-by: Song Shuai <suagrfillet@gmail.com> > --- > arch/riscv/kernel/crash_core.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/riscv/kernel/crash_core.c b/arch/riscv/kernel/crash_core.c > index b351a3c01355..55f1d7856b54 100644 > --- a/arch/riscv/kernel/crash_core.c > +++ b/arch/riscv/kernel/crash_core.c > @@ -18,4 +18,6 @@ void arch_crash_save_vmcoreinfo(void) > vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END); > #endif > vmcoreinfo_append_str("NUMBER(KERNEL_LINK_ADDR)=0x%lx\n", KERNEL_LINK_ADDR); > + vmcoreinfo_append_str("NUMBER(va_kernel_pa_offset)=0x%lx\n", > + kernel_map.va_kernel_pa_offset); > } Reviewed-by: Xianting Tian <xianting.tian@linux.alibaba.com>
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