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riscv: Add SBI debug trigger extension and function ids

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Debug trigger extension is an SBI extension to support native debugging
in S-mode and VS-mode. This patch adds the extension and the function
IDs defined by the extension.

Signed-off-by: Himanshu Chauhan <hchauhan@ventanamicro.com>
Link: https://patch.msgid.link/20250710125231.653967-2-hchauhan@ventanamicro.com
[pjw@kernel.org: updated to apply]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Himanshu Chauhan 2025-07-10 18:22:30 +05:30 committed by Paul Walmsley
parent f02dd25472
commit 5efaf92da4
1 changed files with 29 additions and 0 deletions
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29
arch/riscv/include/asm/sbi.h
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@ -37,6 +37,7 @@ enum sbi_ext_id {
SBI_EXT_NACL = 0x4E41434C,
SBI_EXT_FWFT = 0x46574654,
SBI_EXT_MPXY = 0x4D505859,
SBI_EXT_DBTR = 0x44425452,
/* Experimentals extensions must lie within this range */
SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@ -505,6 +506,34 @@ enum sbi_mpxy_rpmi_attribute_id {
#define SBI_MPXY_CHAN_CAP_SEND_WITHOUT_RESP BIT(4)
#define SBI_MPXY_CHAN_CAP_GET_NOTIFICATIONS BIT(5)
/* 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;
};
union sbi_dbtr_shmem_entry {
struct sbi_dbtr_data_msg data;
struct sbi_dbtr_id_msg id;
};
/* SBI spec version fields */
#define SBI_SPEC_VERSION_DEFAULT 0x1
#define SBI_SPEC_VERSION_MAJOR_SHIFT 24