| Message ID | 20231025135001.531224-3-dbarboza@ventanamicro.com |
|---|---|
| State | New |
| Headers | show |
| Series | RVA22U64 profile support | expand |
On Wed, Oct 25, 2023 at 10:49:54AM -0300, Daniel Henrique Barboza wrote: > 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> > Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.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 6d1c0a7915..2243dfde64 100644 > --- a/target/riscv/kvm/kvm-cpu.c > +++ b/target/riscv/kvm/kvm-cpu.c > @@ -393,7 +393,7 @@ 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); > } > } > @@ -474,6 +474,11 @@ 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); > + } > } > > static int kvm_riscv_get_regs_core(CPUState *cs) > -- > 2.41.0 > > Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index 6d1c0a7915..2243dfde64 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -393,7 +393,7 @@ 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); } } @@ -474,6 +474,11 @@ 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); + } } static int kvm_riscv_get_regs_core(CPUState *cs)
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> Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com> --- target/riscv/kvm/kvm-cpu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)