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[46.204.109.85]) by smtp.gmail.com with ESMTPSA id h10-20020a5d4fca000000b002c3e94cb757sm5269743wrw.117.2023.02.07.06.47.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Feb 2023 06:47:07 -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: 4bc4786e-a6f6-11ed-93b5-47a8fe42b414 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=UWyN2AklZ+5udnDul9odmXqegN4DHlE2VSRiWyrifCk=; b=ocaxVvlYtFP008qmuBCn/r0eoVYyRMrmmcenV4lyrF8OElaW4XdvlMrx+yszOoiZdf Ql2uCW6a/XmmfBCYhNXzP4UP3tjLFdO2lZOeRM+AQCIA597VSiK1XQkuntVi54QsLcpg zoYTYZQIJb22Eo90typrTbaFXAyS0KHX+vsYOHh9t2VuxrywjleIt3N9vqoZKXrOQSBg AkqAUuoEZiPiA4BCVJftf3phbGObVDP6qsUZHdM+zUm1r6jRGGCp/Lk45cl8miibo5Wy 2qNxGKPj2m6i8xa4/rywq0NndmT19XjHhKJyX3h2nd6rcdLe9LKm5U4ICdVIjpnm6K3i 9ynw== 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=UWyN2AklZ+5udnDul9odmXqegN4DHlE2VSRiWyrifCk=; b=eqKGyu80pn0qVaM4gz4q2CIu685AqH2cF3+IATCUpem5s+PSEaHPOdE7iL2uOG1DJE Y6fSewm3w2RYfsTojjVaykZkh5kXMh5hdlhBZVhLuFhfc4BVbrnFagS/G3tUgqREnoTF J6TO60ryhZzsZghCRpDsu8BlUNKELg/GJ/nHlSMm5/Pm7T+BKL62SB7y33aLhADHLnjv YgXT49Ok2FWYpjq4Oc5Hk2TlqXZKAjs/Re7Fjtl1FhosZ0eR9gSaW9DI66NuMCJXXmJv hSx6YxtkmU6bKyQyz+6G1hX2EWbJUTWS4Kmdyq7XWn74J8R+RZzwnq8ysnZakay/Zmy0 fANA== X-Gm-Message-State: AO0yUKUrMHiq6765HHFfdWbWJPlL2FxRSPX/o7ZJyePn6rN/NMQzIqCj czQN6F+Os/q+I2pizqLDT0bQnJwpenk= X-Google-Smtp-Source: AK7set8dhxnbXJj/Yc55LnNr+mWVMKyhsLBz++8X5Ub8Iyp/LGs9KzAIIqY4J88YsD5O3q6qurIfHQ== X-Received: by 2002:adf:f485:0:b0:2c3:e297:8e4d with SMTP id l5-20020adff485000000b002c3e2978e4dmr2480852wro.6.1675781227718; Tue, 07 Feb 2023 06:47:07 -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 v3 09/14] xen/riscv: introduce decode_cause() stuff Date: Tue, 7 Feb 2023 16:46:44 +0200 Message-Id: <0198e2a5b572b9031eafe7cd1c85c6f9537b704c.1675779308.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 V3: - Nothing changed --- 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); +}