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([94.75.70.14]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-2ee5161fb73sm16149981fa.33.2024.07.02.04.23.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jul 2024 04:23:55 -0700 (PDT) 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: 926905be-3865-11ef-92e8-0d9d20120eaa DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1719919436; x=1720524236; darn=lists.xenproject.org; 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=6BfiwtMm7MMPr/ZmXTaMofeIOTWuXGENJ246OGl6NYg=; b=dMtL2tnglFBNrmRoRv5TFaItaRMEjA3wu9lb4oKY/UIN3VlccZtqwE1V3CEz57zA8Q cc65CIiDCVV3HvRJasz10BW5XBbJV8xkgCVdxwWzrmpZfaA0trlXmSl5EeiUx75+zRxs aqXBAhcjwl0anf/OUbWoiQISUxaeY6qg1guodLbl2x7dZmdLiRd+N6mwUEbofJWKo2xi cB7eD35l9RX6GUgBHemd75lGpPyZ3wf+MuGboGqL0V7itCr6cYcL3XDym7MdbjhFfjTQ H/XIe3U+qe9wZ26pZvS102WqcEC5NkkrjtGWeWypPTgaOrthyGb5DUFECAxT6FnsoeA7 nvFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719919436; x=1720524236; 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=6BfiwtMm7MMPr/ZmXTaMofeIOTWuXGENJ246OGl6NYg=; b=mcpy+DukeU32IaFekFATMQBRjXUUctkLo4PHMVcSHK1sdcavt4WvHvq5TdZS9+Rf5B fYLQ4Is+jajB71eZYePSG3RqUynrmxNEgeF/86FJVfoZUb7WubV4zocfHZKu5c9i7Y84 Md8husjirQ/xLcFNlUzbohhbzRr90SkhWw91a1PQOI5M5ZqczdvslymTTv30i6LV8Mi9 zAUsXQLyTdXzjcMiFSB9krL2ZVYfI494EsjYkFuQwzhm5RtXh41U6bXeiXZE/sgjT7Fp hTZxmyXuiSHCWAaG9ImVrTgsvLeuSah+cu4b1olYgwG5nliGD6DnXY0cExRuOiczd2zx qNjQ== X-Gm-Message-State: AOJu0Yzc0a1Uop4NyTtzZnbigte+cXlUl6LkFTQDj9LlfDdbBVXbipng 4ZzMRJtF9Ksv5qvDwXyMPHvU2Zg1/iLPl+ihpkUpsVl39WkGKiSymP26PynO X-Google-Smtp-Source: AGHT+IE9KF4lKKQ4RhAW0d6YuxQEKRwjd6S/Nb4rUg3IYT13YDl7SwK6mzVEMwNlpXGw5adVrtjj4g== X-Received: by 2002:a05:651c:1511:b0:2ec:4d82:9e93 with SMTP id 38308e7fff4ca-2ee5e6bcb43mr62237861fa.44.1719919436370; Tue, 02 Jul 2024 04:23:56 -0700 (PDT) From: Oleksii Kurochko To: xen-devel@lists.xenproject.org Cc: Oleksii Kurochko , Alistair Francis , Bob Eshleman , Connor Davis , Andrew Cooper , Jan Beulich , Julien Grall , Stefano Stabellini Subject: [PATCH v9 2/5] xen/riscv: introduce decode_cause() stuff Date: Tue, 2 Jul 2024 13:23:47 +0200 Message-ID: <3b93bb33b42cb6e86a38cd95a098e60447666e2e.1719918148.git.oleksii.kurochko@gmail.com> X-Mailer: git-send-email 2.45.2 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 Acked-by: Alistair Francis Acked-by: Jan Beulich --- xen/arch/riscv/traps.c | 80 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 79 insertions(+), 1 deletion(-) diff --git a/xen/arch/riscv/traps.c b/xen/arch/riscv/traps.c index 5415cf8d90..37cec40dfa 100644 --- a/xen/arch/riscv/traps.c +++ b/xen/arch/riscv/traps.c @@ -9,13 +9,91 @@ #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"; +} + +static 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 External Interrupt"; + default: + return "UNKNOWN IRQ type"; + } +} + +static 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); + } +} + +static 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); + + printk("Unhandled exception: %s\n", decode_cause(cause)); + die(); } +void do_trap(struct cpu_user_regs *cpu_regs) +{ + do_unexpected_trap(cpu_regs); +} + void vcpu_show_execution_state(struct vcpu *v) { BUG_ON("unimplemented");