diff options
Diffstat (limited to 'arch/riscv/kvm/vcpu_switch.S')
| -rw-r--r-- | arch/riscv/kvm/vcpu_switch.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vcpu_switch.S b/arch/riscv/kvm/vcpu_switch.S index 9f13e5ce6a18..47686bcb21e0 100644 --- a/arch/riscv/kvm/vcpu_switch.S +++ b/arch/riscv/kvm/vcpu_switch.S @@ -218,6 +218,35 @@ SYM_FUNC_START(__kvm_riscv_switch_to) ret SYM_FUNC_END(__kvm_riscv_switch_to) + /* + * Parameters: + * A0 <= Pointer to struct kvm_vcpu_arch + * A1 <= SBI extension ID + * A2 <= SBI function ID + */ +SYM_FUNC_START(__kvm_riscv_nacl_switch_to) + SAVE_HOST_GPRS + + SAVE_HOST_AND_RESTORE_GUEST_CSRS .Lkvm_nacl_switch_return + + /* Resume Guest using SBI nested acceleration */ + add a6, a2, zero + add a7, a1, zero + ecall + + /* Back to Host */ + .align 2 +.Lkvm_nacl_switch_return: + SAVE_GUEST_GPRS + + SAVE_GUEST_AND_RESTORE_HOST_CSRS + + RESTORE_HOST_GPRS + + /* Return to C code */ + ret +SYM_FUNC_END(__kvm_riscv_nacl_switch_to) + SYM_CODE_START(__kvm_riscv_unpriv_trap) /* * We assume that faulting unpriv load/store instruction is |