SBI specification defines HSM extension that allows to start/stop a hart
by a supervisor anytime. The specification is available at
https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc
Add those definitions here.
Signed-off-by: Atish Patra <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
---
arch/riscv/include/asm/sbi.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 82ff88f06ddc..450430c15879 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -26,6 +26,7 @@ enum sbi_ext_id {
SBI_EXT_TIME = 0x54494D45,
SBI_EXT_IPI = 0x735049,
SBI_EXT_RFENCE = 0x52464E43,
+ SBI_EXT_HSM = 0x48534D,
};
enum sbi_ext_base_fid {
@@ -56,6 +57,19 @@ enum sbi_ext_rfence_fid {
SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
};
+enum sbi_ext_hsm_fid {
+ SBI_EXT_HSM_HART_START = 0,
+ SBI_EXT_HSM_HART_STOP,
+ SBI_EXT_HSM_HART_STATUS,
+};
+
+enum sbi_hsm_hart_status {
+ SBI_HSM_HART_STATUS_STARTED = 0,
+ SBI_HSM_HART_STATUS_STOPPED,
+ SBI_HSM_HART_STATUS_START_PENDING,
+ SBI_HSM_HART_STATUS_STOP_PENDING,
+};
+
#define SBI_SPEC_VERSION_DEFAULT 0x1
#define SBI_SPEC_VERSION_MAJOR_SHIFT 24
#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
--
2.25.0