[Crash-utility] RISCV64: Use va_kernel_pa_offset in VTOP()

[Conor Dooley]

Hey,

On Mon, Jul 24, 2023 at 12:06:49PM +0800, Song Shuai wrote:
> Since RISC-V Linux v6.4, the commit 3335068f8721 ("riscv: Use
> PUD/P4D/PGD pages for the linear mapping") changes the
> phys_ram_base from the kernel_map.phys_addr to the start of DRAM.
> 
> The Crash's VTOP() still uses phys_ram_base and kernel_map.virt_addr
> to translate kernel virtual address, that made Crash boot failed with
> Linux v6.4 and later version.
> 
> Let Linux export kernel_map.va_kernel_pa_offset in v6.5 and Crash can
> use "va_kernel_pa_offset" to translate the kernel virtual address in
> VTOP() correctly.
> 
> Signed-off-by: Song Shuai <suagrfillet at gmail.com>
> ---
> You can check/test the Linux changes from this link:
> https://github.com/sugarfillet/linux/commits/6.5-rc3-crash
> 
> And I'll send the Linux changes to riscv/for-next If you're ok with this patch.

If you want this to go into 6.5, you'll need to send it for riscv/fixes
instead. It sounds like a fix for this would need to go into 6.4 too,
no?

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