RISC-V: paravirt: Implement steal-time support
When the SBI STA extension exists we can use it to implement paravirt steal-time support. Fill in the empty pv-time functions with an SBI STA implementation and add the Kconfig knobs allowing it to be enabled. Acked-by:Palmer Dabbelt <palmer@rivosinc.com> Reviewed-by:
Atish Patra <atishp@rivosinc.com> Reviewed-by:
Anup Patel <anup@brainfault.org> Signed-off-by:
Andrew Jones <ajones@ventanamicro.com> Signed-off-by:
Anup Patel <anup@brainfault.org>
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