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hypervisor: Introduce riscv64_get_one_reg_from_vcpu macro

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`riscv64_get_one_reg_from_vcpu` macro is used to extract RISC-V register
data from KVM Vcpu according to `$reg_name` provided to `state`.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>
This commit is contained in:
Ruoqing He
2025-03-26 17:25:24 +08:00
committed by RuoqingHe
parent 0dd0364bf8
commit ce5fe7f89d
1 changed files with 25 additions and 0 deletions
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25
hypervisor/src/kvm/mod.rs
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@@ -1493,6 +1493,31 @@ impl cpu::Vcpu for KvmVcpu {
fn get_regs(&self) -> cpu::Result<StandardRegisters> {
let mut state = kvm_riscv_core::default();
/// Macro used to extract RISC-V register data from KVM Vcpu according
/// to `$reg_name` provided to `state`.
macro_rules! riscv64_get_one_reg_from_vcpu {
(mode) => {
let off = offset_of!(kvm_riscv_core, mode);
let mut bytes = [0_u8; 8];
self.fd
.lock()
.unwrap()
.get_one_reg(riscv64_reg_id!(KVM_REG_RISCV_CORE, off), &mut bytes)
.map_err(|e| cpu::HypervisorCpuError::GetRiscvCoreRegister(e.into()))?;
state.mode = u64::from_le_bytes(bytes);
};
($reg_name:ident) => {
let off = offset_of!(kvm_riscv_core, regs, user_regs_struct, $reg_name);
let mut bytes = [0_u8; 8];
self.fd
.lock()
.unwrap()
.get_one_reg(riscv64_reg_id!(KVM_REG_RISCV_CORE, off), &mut bytes)
.map_err(|e| cpu::HypervisorCpuError::GetRiscvCoreRegister(e.into()))?;
state.regs.$reg_name = u64::from_le_bytes(bytes);
};
}
let off = offset_of!(kvm_riscv_core, regs, user_regs_struct, pc);
let mut bytes = [0_u8; 8];
self.fd