Messages in this thread | | | Subject | Re: [PATCH v1] riscv: fix reserved memory setup | Date | Thu, 10 Nov 2022 14:54:09 -0800 | From | Palmer Dabbelt <> |
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On Mon, 7 Nov 2022 15:15:25 +0000, Conor Dooley wrote: > Currently, RISC-V sets up reserved memory using the "early" copy of the > device tree. As a result, when trying to get a reserved memory region > using of_reserved_mem_lookup(), the pointer to reserved memory regions > is using the early, pre-virtual-memory address which causes a kernel > panic when trying to use the buffer's name: > > Unable to handle kernel paging request at virtual address 00000000401c31ac > Oops [#1] > Modules linked in: > CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00001-g0d9d6953d834 #1 > Hardware name: Microchip PolarFire-SoC Icicle Kit (DT) > epc : string+0x4a/0xea > ra : vsnprintf+0x1e4/0x336 > epc : ffffffff80335ea0 ra : ffffffff80338936 sp : ffffffff81203be0 > gp : ffffffff812e0a98 tp : ffffffff8120de40 t0 : 0000000000000000 > t1 : ffffffff81203e28 t2 : 7265736572203a46 s0 : ffffffff81203c20 > s1 : ffffffff81203e28 a0 : ffffffff81203d22 a1 : 0000000000000000 > a2 : ffffffff81203d08 a3 : 0000000081203d21 a4 : ffffffffffffffff > a5 : 00000000401c31ac a6 : ffff0a00ffffff04 a7 : ffffffffffffffff > s2 : ffffffff81203d08 s3 : ffffffff81203d00 s4 : 0000000000000008 > s5 : ffffffff000000ff s6 : 0000000000ffffff s7 : 00000000ffffff00 > s8 : ffffffff80d9821a s9 : ffffffff81203d22 s10: 0000000000000002 > s11: ffffffff80d9821c t3 : ffffffff812f3617 t4 : ffffffff812f3617 > t5 : ffffffff812f3618 t6 : ffffffff81203d08 > status: 0000000200000100 badaddr: 00000000401c31ac cause: 000000000000000d > [<ffffffff80338936>] vsnprintf+0x1e4/0x336 > [<ffffffff80055ae2>] vprintk_store+0xf6/0x344 > [<ffffffff80055d86>] vprintk_emit+0x56/0x192 > [<ffffffff80055ed8>] vprintk_default+0x16/0x1e > [<ffffffff800563d2>] vprintk+0x72/0x80 > [<ffffffff806813b2>] _printk+0x36/0x50 > [<ffffffff8068af48>] print_reserved_mem+0x1c/0x24 > [<ffffffff808057ec>] paging_init+0x528/0x5bc > [<ffffffff808031ae>] setup_arch+0xd0/0x592 > [<ffffffff8080070e>] start_kernel+0x82/0x73c > > [...]
Applied, thanks!
[1/1] riscv: fix reserved memory setup https://git.kernel.org/palmer/c/50e63dd8ed92
Best regards, -- Palmer Dabbelt <palmer@rivosinc.com>
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