kvm_riscv_setup_vsip
vsipは, VS-modeでのIP(interrupt pending)を示すCSR
Additional CSRs are provided to HS-mode, but not to VS-mode
とあるとおり、CPUとしてはVS-mode用のCSRは用意されない、
code:arch/riscv/kvm/vcpu.c
static unsigned long __percpu *vsip_shadow;
...
int kvm_riscv_setup_vsip(void)
{
vsip_shadow = alloc_percpu(unsigned long);
if (!vsip_shadow)
return -ENOMEM;
return 0;
}
...