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[90.112.199.53]) by smtp.gmail.com with ESMTPSA id d3-20020adfe2c3000000b002bc7fcf08ddsm3971131wrj.103.2023.01.27.05.59.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Jan 2023 05:59:52 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: df587b6a-9e4a-11ed-a5d9-ddcf98b90cbd DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iFyYyPwBn9OgtucWxezUDT/W93gze1yZbOtcpEyG5FI=; b=nEzGY4RrpxaVb3ZuCObP2TewcA8p1mMJ8Te3uzA2J2GNVDnNgSG729cegKOCYy2hCI jG2w9WFh5suUgQxLGGixYNQfFFgte3H9QT/T2Wsu3r8bzLXK4rmP0jm65MgnMWP2QpgW 1uvlHG6NjR0v70WT8unlJe9g7E5t8VzDJL7K6C7sW7vu+Dl/SeTElfioXB4PT48siwwi EFIPj1P5tl9Xm+BHD0A5PsS2GvCWoDAQyS9mfDrAs1uI75gkck1EL+Sd/GkJEO4scvHL IFsnasEz8djaJdWlFNj7W2kDj2DraF+pcB5BFschBSrgKpoic9NBNDKZYv1iwkoEQ/9j 2Quw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iFyYyPwBn9OgtucWxezUDT/W93gze1yZbOtcpEyG5FI=; b=6xcu4uMbdKU0uLQ3w29KFyOk78qfnCmV/wv/RII5TVoNvD4kELZbx11hlZkE9s7SJE pqUvWBbap4Ru6WocEt+f+u+slUW2w+TgeeCBrCZui859zoXyGG5triT6usaCbPwQi7ua VBnF5uDXL0EAYhHi7rpmOq56hbOWkG5IgSEPEFLCu9eMuasP3cFNMzuseCLJ/7ribAWE HJeko6AaCZEyimTp06vxRdkZ1Pdle89/ukdmDpfL5J9whlooogO/bEctdB1uSGAo08LZ s9s7LUj9kw6xvItCY1jJUoGg4fsZuVEuhpCVkQAo+mt2dqXRttTX96d6i3nQZ+0e8uJg QzhA== X-Gm-Message-State: AFqh2krBvu3vKLWuuHmvGIdTeL5M4ZNZXDfTyAba5OQtLtKWzddaki6N gu/envEDfhl6ghnmzwueulFo+NuJkV8= X-Google-Smtp-Source: AMrXdXv4349AKuNWUMaghthp68QWPvH7Xes8fNq4qne42EPmK/TeGCJXxAtyuuS5aqMs+d4CEEC6IA== X-Received: by 2002:a5d:6548:0:b0:2bd:f645:19dc with SMTP id z8-20020a5d6548000000b002bdf64519dcmr32348410wrv.68.1674827992465; Fri, 27 Jan 2023 05:59:52 -0800 (PST) From: Oleksii Kurochko To: xen-devel@lists.xenproject.org Cc: Jan Beulich , Julien Grall , Andrew Cooper , Stefano Stabellini , Gianluca Guida , Oleksii Kurochko , Bob Eshleman , Alistair Francis , Connor Davis Subject: [PATCH v2 09/14] xen/riscv: introduce decode_cause() stuff Date: Fri, 27 Jan 2023 15:59:14 +0200 Message-Id: <5deb64dcb85d5ddef33c9a1adc9c50ddaadc5d5a.1674818705.git.oleksii.kurochko@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: References: MIME-Version: 1.0 The patch introduces stuff needed to decode a reason of an exception. Signed-off-by: Oleksii Kurochko --- Changes in V2: - Make decode_trap_cause() more optimization friendly. - Merge the pathc which introduces do_unexpected_trap() to the current one. --- xen/arch/riscv/traps.c | 85 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 84 insertions(+), 1 deletion(-) diff --git a/xen/arch/riscv/traps.c b/xen/arch/riscv/traps.c index ccd3593f5a..f2a1e1ffcf 100644 --- a/xen/arch/riscv/traps.c +++ b/xen/arch/riscv/traps.c @@ -4,10 +4,93 @@ * * RISC-V Trap handlers */ +#include +#include #include #include +#include +#include -void do_trap(struct cpu_user_regs *cpu_regs) +static const char *decode_trap_cause(unsigned long cause) +{ + static const char *const trap_causes[] = { + [CAUSE_MISALIGNED_FETCH] = "Instruction Address Misaligned", + [CAUSE_FETCH_ACCESS] = "Instruction Access Fault", + [CAUSE_ILLEGAL_INSTRUCTION] = "Illegal Instruction", + [CAUSE_BREAKPOINT] = "Breakpoint", + [CAUSE_MISALIGNED_LOAD] = "Load Address Misaligned", + [CAUSE_LOAD_ACCESS] = "Load Access Fault", + [CAUSE_MISALIGNED_STORE] = "Store/AMO Address Misaligned", + [CAUSE_STORE_ACCESS] = "Store/AMO Access Fault", + [CAUSE_USER_ECALL] = "Environment Call from U-Mode", + [CAUSE_SUPERVISOR_ECALL] = "Environment Call from S-Mode", + [CAUSE_MACHINE_ECALL] = "Environment Call from M-Mode", + [CAUSE_FETCH_PAGE_FAULT] = "Instruction Page Fault", + [CAUSE_LOAD_PAGE_FAULT] = "Load Page Fault", + [CAUSE_STORE_PAGE_FAULT] = "Store/AMO Page Fault", + [CAUSE_FETCH_GUEST_PAGE_FAULT] = "Instruction Guest Page Fault", + [CAUSE_LOAD_GUEST_PAGE_FAULT] = "Load Guest Page Fault", + [CAUSE_VIRTUAL_INST_FAULT] = "Virtualized Instruction Fault", + [CAUSE_STORE_GUEST_PAGE_FAULT] = "Guest Store/AMO Page Fault", + }; + + if ( cause < ARRAY_SIZE(trap_causes) && trap_causes[cause] ) + return trap_causes[cause]; + return "UNKNOWN"; +} + +const char *decode_reserved_interrupt_cause(unsigned long irq_cause) +{ + switch ( irq_cause ) + { + case IRQ_M_SOFT: + return "M-mode Software Interrupt"; + case IRQ_M_TIMER: + return "M-mode TIMER Interrupt"; + case IRQ_M_EXT: + return "M-mode TIMER Interrupt"; + default: + return "UNKNOWN IRQ type"; + } +} + +const char *decode_interrupt_cause(unsigned long cause) +{ + unsigned long irq_cause = cause & ~CAUSE_IRQ_FLAG; + + switch ( irq_cause ) + { + case IRQ_S_SOFT: + return "Supervisor Software Interrupt"; + case IRQ_S_TIMER: + return "Supervisor Timer Interrupt"; + case IRQ_S_EXT: + return "Supervisor External Interrupt"; + default: + return decode_reserved_interrupt_cause(irq_cause); + } +} + +const char *decode_cause(unsigned long cause) +{ + if ( cause & CAUSE_IRQ_FLAG ) + return decode_interrupt_cause(cause); + + return decode_trap_cause(cause); +} + +static void do_unexpected_trap(const struct cpu_user_regs *regs) { + unsigned long cause = csr_read(CSR_SCAUSE); + + early_printk("Unhandled exception: "); + early_printk(decode_cause(cause)); + early_printk("\n"); + die(); } + +void do_trap(struct cpu_user_regs *cpu_regs) +{ + do_unexpected_trap(cpu_regs); +}