RISC-V: Add SBI HSM suspend related defines

We add defines related to SBI HSM suspend call and also update HSM states
naming as-per the latest SBI specification.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index d1c3747..06133b4 100644 (file)
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -71,15 +71,32 @@ enum sbi_ext_hsm_fid {
        SBI_EXT_HSM_HART_START = 0,
        SBI_EXT_HSM_HART_STOP,
        SBI_EXT_HSM_HART_STATUS,
+       SBI_EXT_HSM_HART_SUSPEND,
 };
 
-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,
+enum sbi_hsm_hart_state {
+       SBI_HSM_STATE_STARTED = 0,
+       SBI_HSM_STATE_STOPPED,
+       SBI_HSM_STATE_START_PENDING,
+       SBI_HSM_STATE_STOP_PENDING,
+       SBI_HSM_STATE_SUSPENDED,
+       SBI_HSM_STATE_SUSPEND_PENDING,
+       SBI_HSM_STATE_RESUME_PENDING,
 };
 
+#define SBI_HSM_SUSP_BASE_MASK                 0x7fffffff
+#define SBI_HSM_SUSP_NON_RET_BIT               0x80000000
+#define SBI_HSM_SUSP_PLAT_BASE                 0x10000000
+
+#define SBI_HSM_SUSPEND_RET_DEFAULT            0x00000000
+#define SBI_HSM_SUSPEND_RET_PLATFORM           SBI_HSM_SUSP_PLAT_BASE
+#define SBI_HSM_SUSPEND_RET_LAST               SBI_HSM_SUSP_BASE_MASK
+#define SBI_HSM_SUSPEND_NON_RET_DEFAULT                SBI_HSM_SUSP_NON_RET_BIT
+#define SBI_HSM_SUSPEND_NON_RET_PLATFORM       (SBI_HSM_SUSP_NON_RET_BIT | \
+                                                SBI_HSM_SUSP_PLAT_BASE)
+#define SBI_HSM_SUSPEND_NON_RET_LAST           (SBI_HSM_SUSP_NON_RET_BIT | \
+                                                SBI_HSM_SUSP_BASE_MASK)
+
 enum sbi_ext_srst_fid {
        SBI_EXT_SRST_RESET = 0,
 };

diff --git a/arch/riscv/kernel/cpu_ops_sbi.c b/arch/riscv/kernel/cpu_ops_sbi.c
index dae29cb..2e16f67 100644 (file)
--- a/arch/riscv/kernel/cpu_ops_sbi.c
+++ b/arch/riscv/kernel/cpu_ops_sbi.c
@@ -111,7 +111,7 @@ static int sbi_cpu_is_stopped(unsigned int cpuid)
 
        rc = sbi_hsm_hart_get_status(hartid);
 
-       if (rc == SBI_HSM_HART_STATUS_STOPPED)
+       if (rc == SBI_HSM_STATE_STOPPED)
                return 0;
        return rc;
 }

diff --git a/arch/riscv/kvm/vcpu_sbi_hsm.c b/arch/riscv/kvm/vcpu_sbi_hsm.c
index 2e38368..1ac4b2e 100644 (file)
--- a/arch/riscv/kvm/vcpu_sbi_hsm.c
+++ b/arch/riscv/kvm/vcpu_sbi_hsm.c
@@ -60,9 +60,9 @@ static int kvm_sbi_hsm_vcpu_get_status(struct kvm_vcpu *vcpu)
        if (!target_vcpu)
                return -EINVAL;
        if (!target_vcpu->arch.power_off)
-               return SBI_HSM_HART_STATUS_STARTED;
+               return SBI_HSM_STATE_STARTED;
        else
-               return SBI_HSM_HART_STATUS_STOPPED;
+               return SBI_HSM_STATE_STOPPED;
 }
 
 static int kvm_sbi_ext_hsm_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,