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([49.37.248.155]) by smtp.gmail.com with ESMTPSA id k5-20020a170902e90500b001db7599aba0sm9898438pld.24.2024.02.22.04.51.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 22 Feb 2024 04:51:05 -0800 (PST) From: Himanshu Chauhan To: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu Subject: [RFC PATCH 1/2] riscv: Add SBI debug trigger extension and function ids Date: Thu, 22 Feb 2024 18:20:58 +0530 Message-Id: <20240222125059.13331-2-hchauhan@ventanamicro.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240222125059.13331-1-hchauhan@ventanamicro.com> References: <20240222125059.13331-1-hchauhan@ventanamicro.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240222_045107_664296_21BAF5E9 X-CRM114-Status: GOOD ( 10.74 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Debug trigger extension is a proposed SBI extension to support native debugging in S-mode and VS-mode. The proposal for the extension can be found at: https://lists.riscv.org/g/sig-hypervisors/message/361 This patch adds the extension and the function IDs defined by the extension. Signed-off-by: Himanshu Chauhan --- arch/riscv/include/asm/sbi.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 6e68f8dff76b..e79ff1a2f387 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -34,6 +34,9 @@ enum sbi_ext_id { SBI_EXT_DBCN = 0x4442434E, SBI_EXT_STA = 0x535441, + /* SBI Debug Trigger Extension */ + SBI_EXT_DBTR = 0x44425452, + /* Experimentals extensions must lie within this range */ SBI_EXT_EXPERIMENTAL_START = 0x08000000, SBI_EXT_EXPERIMENTAL_END = 0x08FFFFFF, @@ -124,6 +127,34 @@ enum sbi_ext_susp_sleep_type { SBI_SUSP_SLEEP_TYPE_SUSPEND_TO_RAM = 0, }; +/* SBI debug triggers function IDs */ +enum sbi_ext_dbtr_fid { + SBI_EXT_DBTR_NUM_TRIGGERS = 0, + SBI_EXT_DBTR_SETUP_SHMEM, + SBI_EXT_DBTR_TRIG_READ, + SBI_EXT_DBTR_TRIG_INSTALL, + SBI_EXT_DBTR_TRIG_UPDATE, + SBI_EXT_DBTR_TRIG_UNINSTALL, + SBI_EXT_DBTR_TRIG_ENABLE, + SBI_EXT_DBTR_TRIG_DISABLE, +}; + +struct sbi_dbtr_data_msg { + unsigned long tstate; + unsigned long tdata1; + unsigned long tdata2; + unsigned long tdata3; +}; + +struct sbi_dbtr_id_msg { + unsigned long idx; +}; + +struct sbi_dbtr_shmem_entry { + struct sbi_dbtr_data_msg data; + struct sbi_dbtr_id_msg id; +}; + enum sbi_ext_pmu_fid { SBI_EXT_PMU_NUM_COUNTERS = 0, SBI_EXT_PMU_COUNTER_GET_INFO,