Commit 98b90ede authored May 01, 2023 by WANG Xuerui Committed by Huacai Chen May 01, 2023

LoongArch: Humanize the ESTAT line when showing registers



Example output looks like:

[   xx.xxxxxx] ESTAT: 00001000 [INT] (IS=12 ECode=0 EsubCode=0)

Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

parent 5e3e784d

arch/loongarch/kernel/traps.c

+75 −7

Original line number	Diff line number	Diff line
		@@ -234,11 +234,83 @@ static void print_ecfg(unsigned long x)
		pr_cont(" VS=%d)\n", (int) FIELD_GET(CSR_ECFG_VS, x));
		}

		static const char *humanize_exc_name(unsigned int ecode, unsigned int esubcode)
		{
		/*
		* LoongArch users and developers are probably more familiar with
		* those names found in the ISA manual, so we are going to print out
		* the latter. This will require some mapping.
		*/
		switch (ecode) {
		case EXCCODE_RSV: return "INT";
		case EXCCODE_TLBL: return "PIL";
		case EXCCODE_TLBS: return "PIS";
		case EXCCODE_TLBI: return "PIF";
		case EXCCODE_TLBM: return "PME";
		case EXCCODE_TLBNR: return "PNR";
		case EXCCODE_TLBNX: return "PNX";
		case EXCCODE_TLBPE: return "PPI";
		case EXCCODE_ADE:
		switch (esubcode) {
		case EXSUBCODE_ADEF: return "ADEF";
		case EXSUBCODE_ADEM: return "ADEM";
		}
		break;
		case EXCCODE_ALE: return "ALE";
		case EXCCODE_BCE: return "BCE";
		case EXCCODE_SYS: return "SYS";
		case EXCCODE_BP: return "BRK";
		case EXCCODE_INE: return "INE";
		case EXCCODE_IPE: return "IPE";
		case EXCCODE_FPDIS: return "FPD";
		case EXCCODE_LSXDIS: return "SXD";
		case EXCCODE_LASXDIS: return "ASXD";
		case EXCCODE_FPE:
		switch (esubcode) {
		case EXCSUBCODE_FPE: return "FPE";
		case EXCSUBCODE_VFPE: return "VFPE";
		}
		break;
		case EXCCODE_WATCH:
		switch (esubcode) {
		case EXCSUBCODE_WPEF: return "WPEF";
		case EXCSUBCODE_WPEM: return "WPEM";
		}
		break;
		case EXCCODE_BTDIS: return "BTD";
		case EXCCODE_BTE: return "BTE";
		case EXCCODE_GSPR: return "GSPR";
		case EXCCODE_HVC: return "HVC";
		case EXCCODE_GCM:
		switch (esubcode) {
		case EXCSUBCODE_GCSC: return "GCSC";
		case EXCSUBCODE_GCHC: return "GCHC";
		}
		break;
		/*
		* The manual did not mention the EXCCODE_SE case, but print out it
		* nevertheless.
		*/
		case EXCCODE_SE: return "SE";
		}

		return "???";
		}

		static void print_estat(unsigned long x)
		{
		unsigned int ecode = FIELD_GET(CSR_ESTAT_EXC, x);
		unsigned int esubcode = FIELD_GET(CSR_ESTAT_ESUBCODE, x);

		printk("ESTAT: %08lx [%s] (", x, humanize_exc_name(ecode, esubcode));
		print_intr_fragment("IS", FIELD_GET(CSR_ESTAT_IS, x));
		pr_cont(" ECode=%d EsubCode=%d)\n", (int) ecode, (int) esubcode);
		}

		static void __show_regs(const struct pt_regs *regs)
		{
		const int field = 2 * sizeof(unsigned long);
		unsigned int excsubcode;
		unsigned int exccode;
		unsigned int exccode = FIELD_GET(CSR_ESTAT_EXC, regs->csr_estat);

		show_regs_print_info(KERN_DEFAULT);

		@@ -279,11 +351,7 @@ static void __show_regs(const struct pt_regs *regs)
		print_prmd(regs->csr_prmd);
		print_euen(regs->csr_euen);
		print_ecfg(regs->csr_ecfg);
		printk("ESTAT: %08lx\n", regs->csr_estat);

		exccode = ((regs->csr_estat) & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT;
		excsubcode = ((regs->csr_estat) & CSR_ESTAT_ESUBCODE) >> CSR_ESTAT_ESUBCODE_SHIFT;
		printk("ExcCode : %x (SubCode %x)\n", exccode, excsubcode);
		print_estat(regs->csr_estat);

		if (exccode >= EXCCODE_TLBL && exccode <= EXCCODE_ALE)
		printk("BadVA : %0*lx\n", field, regs->csr_badvaddr);