questions about OpenSBI Version 1.5

[ji2yoon-jo]

I downloaded and ported your latest version of OpenSBI Version 1.5, but during kernel booting, the cause is not stamped on the mcause variable in the sbi_trap_handler () function, but the opensbi address(loaded phisical address) is included, so it cannot be booted. What's the problem?

[ji2yoon-jo]

[openSBI version 1.3] [sbi_trap_handler] mcause=0x9

[openSBI version 1.5] [sbi_trap_handler] mcause=0x7ff40000

[avpatel]

Need more information about the issue such as detail bootlog, location of sources, etc.

[ji2yoon-jo]

OpenSBI v1.5-12-g4a5d11d

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/ \ / __	_					_ __	(___		_)							' \ / \ '_ \ ___ \	_ <				__			_)	__/			____)		_)			_ ____/	./ _	_		_	_____/	__/___
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Boot Hart0 Next Address : 0x0000000080200000 Boot Hart0 Next Arg1 : 0x0000000083000000 Platform Name : Platform Features : medeleg Platform HART Count : 4 Platform IPI Device : aia-imsic Platform Timer Device : aclint-mtimer @ 1000000Hz Platform Console Device : onboot_uart Platform HSM Device : --- Platform PMU Device : --- Platform Reboot Device : --- Platform Shutdown Device : --- Platform Suspend Device : --- Platform CPPC Device : --- Firmware Base : 0x7ff40000 Firmware Size : 349 KB Firmware RW Offset : 0x40000 Firmware RW Size : 93 KB Firmware Heap Offset : 0x4d000 Firmware Heap Size : 41 KB (total), 2 KB (reserved), 12 KB (used), 26 KB (free) Firmware Scratch Size : 4096 B (total), 408 B (used), 3688 B (free) Runtime SBI Version : 2.0

Domain0 Name : root Domain0 Boot HART : 0 Domain0 HARTs : 0,1,2,3 Domain0 Region00 : 0x0000000009000000-0x0000000009003fff M: (I,R,W) S/U: () Domain0 Region01 : 0x000000000c004000-0x000000000c007fff M: (I,R,W) S/U: () Domain0 Region02 : 0x0000000005000000-0x000000000500ffff M: (I,R,W) S/U: () Domain0 Region03 : 0x000000007ff80000-0x000000007ff9ffff M: (R,W) S/U: () Domain0 Region04 : 0x000000007ff40000-0x000000007ff7ffff M: (R,X) S/U: () Domain0 Region05 : 0x0000000000000000-0xffffffffffffffff M: () S/U: (R,W,X) Domain0 Next Address : 0x0000000020200000 Domain0 Next Arg1 : 0x0000000023000000 Domain0 Next Mode : S-mode Domain0 SysReset : yes Domain0 SysSuspend : yes

Boot HART ID : 0 Boot HART Domain : root Boot HART Priv Version : v1.12 Boot HART Base ISA : rv64imafdcvhx Boot HART ISA Extensions : smaia,smstateen,sscofpmf,zihpm,zicboz,zicbom,svpbmt,sdtrig,svade,smwg,smwgd Boot HART PMP Count : 8 Boot HART PMP Granularity : 12 bits Boot HART PMP Address Bits: 33 Boot HART MHPM Info : 8 (0x000007f8) Boot HART Debug Triggers : 8 triggers Boot HART MIDELEG : 0x0000000000003666 Boot HART MEDELEG : 0x0000000000f0b508 [sbi_trap.c sbi_trap_handler()] mcause=0x7ff40000 mcause&MCAUSE_IRQ_MASK=0x0

[ji2yoon-jo]

int rc = SBI_ENOTSUPP;
const char *msg = "trap handler failed";
struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
const struct sbi_trap_info *trap = &tcntx->trap;
struct sbi_trap_regs *regs = &tcntx->regs;
ulong mcause = tcntx->trap.cause;   // version 1.5
//ulong mcause = csr_read(CSR_MCAUSE);  // version 1.3

[ji2yoon-jo]

ulong mcause = tcntx->trap.cause; // version 1.5 when patch 1.5 is applied, the mcause value looks strange here.

[ji2yoon-jo]

ulong mcause = tcntx->trap.cause; // version 1.5 when patch 1.5 is applied, the mcause value looks strange here.

do I need a kernel patch?

[avpatel]

We are already saving the mcause CSR value in tcntx->trap.cause. (Refer, https://github.com/riscv-software-src/opensbi/blob/master/firmware/fw_base.S#L538)

[ji2yoon-jo]

What I'm curious about is that if you actually print it out as a log, it contains a different value. It's strange why it has a different value.

[openSBI version 1.3] [sbi_trap_handler] mcause=0x9

[openSBI version 1.5] [sbi_trap_handler] mcause=0x7ff40000

[ji2yoon-jo]

What I'm curious about is that if you actually print it out as a log, it contains a different value. It's strange why it has a different value.

[openSBI version 1.3] [sbi_trap_handler] mcause=0x9

[openSBI version 1.5] [sbi_trap_handler] mcause=0x7ff40000

if i apply the released patch code(v1.5), this problem is occurring, so please let me know which part to look at.

[ji2yoon-jo]

I will check carefully and inquire.