| Message ID | 20200318011144.91532-10-atish.patra@wdc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for SBI v0.2 and CPU hotplug | expand |
On Wed, Mar 18, 2020 at 9:12 AM Atish Patra <atish.patra@wdc.com> wrote: > > 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> > --- > arch/riscv/include/asm/sbi.h | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
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