KVM does not have the means to support enabling the rva22u64 profile.
The main reasons are:
- we're missing support for some mandatory rva22u64 extensions in the
KVM module;
- we can't make promises about enabling a profile since it all depends
on host support in the end.
We'll revisit this decision in the future if needed. For now mark the
'rva22u64' profile as unavailable when running a KVM CPU:
$ qemu-system-riscv64 -machine virt,accel=kvm -cpu rv64,rva22u64=true
qemu-system-riscv64: can't apply global rv64-riscv-cpu.rva22u64=true:
'rva22u64' is not available with KVM
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/kvm/kvm-cpu.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index 5246fc2bdc..dc14c54ce4 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -360,7 +360,7 @@ static void cpu_set_cfg_unavailable(Object *obj, Visitor *v,
}
if (value) {
- error_setg(errp, "extension %s is not available with KVM",
+ error_setg(errp, "'%s' is not available with KVM",
propname);
}
}
@@ -440,6 +440,11 @@ static void kvm_riscv_add_cpu_user_properties(Object
*cpu_obj)
riscv_cpu_add_kvm_unavail_prop_array(cpu_obj, riscv_cpu_extensions);
riscv_cpu_add_kvm_unavail_prop_array(cpu_obj, riscv_cpu_vendor_exts);
riscv_cpu_add_kvm_unavail_prop_array(cpu_obj,
riscv_cpu_experimental_exts);
+
+ /* We don't have the needed KVM support for profiles */
+ for (i = 0; riscv_profiles[i] != NULL; i++) {
+ riscv_cpu_add_kvm_unavail_prop(cpu_obj, riscv_profiles[i]->name);
+ }