Re: [PATCH v2 05/29] LoongArch: KVM: Add vcpu related header files

[Paolo Bonzini]

On 2/21/23 08:12, Xi Ruoyao wrote:
> > We are preparing to submit these instruction support for binutils,
> > however it is still necessary. Supposing that it is supported in future
> > gcc version, we can not drop existing gcc 12/13 supporting to compiling
> > kernel with LoongArch architecture.
> You can drop the support for KVM with less capable Binutils versions,
> like:
>
> config AS_HAS_LVZ
>      def_bool $(as-instr some_gcsr_insn \$r0, \$gcsr0)
>
> config KVM
>      depends on AS_HAS_LVZ

There are precedents in Linux for using .word when necessary.  There's 
no reason to prevent using KVM on old Binutils versions.

Paolo