[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20240222125059.13331-2-hchauhan@ventanamicro.com>
Date: Thu, 22 Feb 2024 18:20:58 +0530
From: Himanshu Chauhan <hchauhan@...tanamicro.com>
To: linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org
Cc: paul.walmsley@...ive.com,
palmer@...belt.com,
aou@...s.berkeley.edu
Subject: [RFC PATCH 1/2] riscv: Add SBI debug trigger extension and function ids
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 <hchauhan@...tanamicro.com>
---
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,
--
2.34.1
Powered by blists - more mailing lists