Commit 5efaf92d authored by Himanshu Chauhan's avatar Himanshu Chauhan Committed by Paul Walmsley
Browse files

riscv: Add SBI debug trigger extension and function ids 



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: default avatarHimanshu Chauhan <hchauhan@ventanamicro.com>
Link: https://patch.msgid.link/20250710125231.653967-2-hchauhan@ventanamicro.com


[pjw@kernel.org: updated to apply]
Signed-off-by: default avatarPaul Walmsley <pjw@kernel.org>
parent f02dd254

arch/riscv/include/asm/sbi.h

+29 −0
Original line number Diff line number Diff line
@@ -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