diff options
| author | Atish Patra <atish.patra@wdc.com> | 2020-03-18 04:11:42 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-03-31 21:26:05 +0300 |
| commit | db5a79460315bd12dedee5f964cd72f3a534ecb2 (patch) | |
| tree | 09e805f9185e0653c4d7d11b7b8046223e933e4b /arch/riscv/include/asm/sbi.h | |
| parent | f90b43ce176c129a84237c9d57fae51aeff3e6ec (diff) | |
| download | linux-db5a79460315bd12dedee5f964cd72f3a534ecb2.tar.xz | |
RISC-V: Add SBI HSM extension definitions
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 <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/include/asm/sbi.h')
| -rw-r--r-- | arch/riscv/include/asm/sbi.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 2bbfd6bada93..653edb25d495 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 |