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[90.112.199.53]) by smtp.gmail.com with ESMTPSA id o2-20020a5d58c2000000b002bdbead763csm25349811wrf.95.2023.01.20.07.00.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Jan 2023 07:00:02 -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: 1f2cbeb6-98d3-11ed-91b6-6bf2151ebd3b DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=b4D+uu+k0+I2IfYB1s/wnaEQNVajcaJWUGoB5Co8S0g=; b=o5aqMMLDum3iAFf5vYbbWfjS3IKHcX4+HgWUaNDwB9aygQPMaYFjM6xG8VvrZeqiT5 juFi3kb3HA5KXAKDHNG8J+Uqm/F6qXJzcthIQ8y/2+j7vrHD1pp5joMCWfOJ5clyKPpM NTPqijSKBflLYJ8NxFcJIXPhVa5Wgltmud0qFKdQYoM+bbPSbSMsQZave4gX68JEjoGX MJ0tHDtcAiiz998oqSw9ZeXyWLdnOHXB1oU0n9w0EMptfkIgyN5xGGVWnwZ6wZvTKqTJ j8g4UDRkbnnUMts9PWJwnpZGZ9zZIs0dxhHRN0O+8BKApyINsi1WSZ3uNKEIsCWzpwU7 AELQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=b4D+uu+k0+I2IfYB1s/wnaEQNVajcaJWUGoB5Co8S0g=; b=ckKg0OZokC7uQFGXYDKqJOBL2mHdc7yr1Q9ALZNu7/pqSW7gzX0/byvE+jtq2KAvz/ yuqMhJwmMIp/NgibSdVMq7WnF1iDBHMcg/V+RSbTjfWRcg7TL5UHgDI1LUBvYTkm9oy3 GjGX3kH6+VUnzKxwqO+YX/QfwWu7VHj61x02XT74ROK6+qBZn5zs5T7+GlfoE59kwSgR H+2siP1vRMjBVXcHF/KBAR7Omb1uqSI159dEPHzL4FPmAJ22LpHM8iuFw7vCnMplzles Nqek76W2gk3I89+Fm41gQOYeViEM6F1DIOp6VQoZ1G8ABgpqyrh9jp/REM4y9zyhmbdj KAQQ== X-Gm-Message-State: AFqh2kqdS1JCKesJQyiPvzL+ZQzBwC4LJakjASE0rEtPbMgGagEkUtqA r4KbC/Zi5K5VWoLhlU+x3pxXyZ6z5U95Zg== X-Google-Smtp-Source: AMrXdXvl8I9pwLlW83BJzfK/DNqKxEl8Cj8Lmkhd89JGrPriE66dgOepOsyIAke/nyXgFQKXXwwqFg== X-Received: by 2002:a05:6000:1c6:b0:2bd:e40d:98d5 with SMTP id t6-20020a05600001c600b002bde40d98d5mr11462585wrx.0.1674226802982; Fri, 20 Jan 2023 07:00:02 -0800 (PST) From: Oleksii Kurochko To: xen-devel@lists.xenproject.org Cc: Andrew Cooper , Stefano Stabellini , Gianluca Guida , Oleksii Kurochko , Bob Eshleman , Alistair Francis , Connor Davis , Doug Goldstein Subject: [PATCH v1 00/14] RISCV basic exception handling implementation Date: Fri, 20 Jan 2023 16:59:40 +0200 Message-Id: X-Mailer: git-send-email 2.39.0 MIME-Version: 1.0 The patch series is based on another one [Basic early_printk and smoke test implementation] which hasn't been commited yet. The patch series provides a basic implementation of exception handling. It can do only basic things such as decode a cause of an exception, save/restore registers and execute "wfi" instruction if an exception can not be handled. To verify that exception handling works well it was implemented macros from such as BUG/WARN/run_in_exception/assert_failed. The implementation of macros is used "ebreak" instruction and set up bug frame tables for each type of macros. Also it was implemented register save/restore to return and continue work after WARN/run_in_exception. Not all functionality of the macros was implemented as some of them require hard-panic the system which is not available now. Instead of hard-panic 'wfi' instruction is used but it should be definitely changed in the neareset future. It wasn't implemented show_execution_state() and stack trace discovering as it's not necessary now. Oleksii Kurochko (14): xen/riscv: add _zicsr to CFLAGS xen/riscv: add header xen/riscv: add header xen/riscv: add early_printk_hnum() function xen/riscv: introduce exception context xen/riscv: introduce exception handlers implementation xen/riscv: introduce decode_cause() stuff xen/riscv: introduce do_unexpected_trap() xen/riscv: mask all interrupts xen/riscv: introduce setup_trap_handler() xen/riscv: introduce an implementation of macros from xen/riscv: test basic handling stuff automation: add smoke test to verify macros from bug.h automation/scripts/qemu-smoke-riscv64.sh | 2 + xen/arch/riscv/Makefile | 2 + xen/arch/riscv/arch.mk | 2 +- xen/arch/riscv/early_printk.c | 39 + xen/arch/riscv/entry.S | 97 ++ xen/arch/riscv/include/asm/asm.h | 54 ++ xen/arch/riscv/include/asm/bug.h | 120 +++ xen/arch/riscv/include/asm/csr.h | 82 ++ xen/arch/riscv/include/asm/early_printk.h | 2 + xen/arch/riscv/include/asm/processor.h | 114 +++ xen/arch/riscv/include/asm/riscv_encoding.h | 945 ++++++++++++++++++++ xen/arch/riscv/include/asm/traps.h | 13 + xen/arch/riscv/riscv64/head.S | 5 + xen/arch/riscv/setup.c | 27 + xen/arch/riscv/traps.c | 229 +++++ xen/arch/riscv/xen.lds.S | 10 + 16 files changed, 1742 insertions(+), 1 deletion(-) create mode 100644 xen/arch/riscv/entry.S create mode 100644 xen/arch/riscv/include/asm/asm.h create mode 100644 xen/arch/riscv/include/asm/bug.h create mode 100644 xen/arch/riscv/include/asm/csr.h create mode 100644 xen/arch/riscv/include/asm/processor.h create mode 100644 xen/arch/riscv/include/asm/riscv_encoding.h create mode 100644 xen/arch/riscv/include/asm/traps.h create mode 100644 xen/arch/riscv/traps.c