Re: [PATCH 09/21] KVM: TDX: Retry seamcall when TDX_OPERAND_BUSY with operand SEPT

[Paolo Bonzini]

On 9/4/24 05:07, Rick Edgecombe wrote:
> +static inline u64 tdx_seamcall_sept(u64 op, struct tdx_module_args *in)
> +{
> +#define SEAMCALL_RETRY_MAX     16

How is the 16 determined?  Also, is the lock per-VM or global?

Thanks,

Paolo

> +	struct tdx_module_args args_in;
> +	int retry = SEAMCALL_RETRY_MAX;
> +	u64 ret;
> +
> +	do {
> +		args_in = *in;
> +		ret = seamcall_ret(op, in);
> +	} while (ret == TDX_ERROR_SEPT_BUSY && retry-- > 0);
> +
> +	*in = args_in;
> +
> +	return ret;
> +}
> +