Re: [Xen-devel] [PATCH for-4.5 2/2] x86/hvm: Improve "Emulation failed @" error messages

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.09.14 at 12:10, <andrew.cooper3@xxxxxxxxxx> wrote:
> @@ -1449,6 +1441,37 @@ struct segment_register *hvmemul_get_seg_reg(
>      return &hvmemul_ctxt->seg_reg[seg];
>  }
>  
> +static const char *guest_x86_mode_to_str(int mode)
> +{
> +    switch ( mode )
> +    {
> +    case 0:
> +        return "Real";
> +    case 1:
> +        return "v8086";
> +    case 2:

return "16bit";

> +    case 4:
> +        return "32bit";
> +    case 8:
> +        return "64bit";
> +    default:
> +        return "Unknown";
> +    }
> +}
> +
> +void hvm_dump_emulation_state(const char *prefix,
> +                              struct hvm_emulate_ctxt *hvmemul_ctxt)
> +{
> +    struct vcpu *curr = current;
> +    const char *mode_str = guest_x86_mode_to_str(hvm_guest_x86_mode(curr));
> +    struct segment_register *cs = hvmemul_get_seg_reg(x86_seg_cs, 
> hvmemul_ctxt);

Long line. And perhaps add "const"?

> +
> +    printk("%s emulation failed: %pv %s mode, %u bytes @ %04x:%lx: %*ph\n",
> +           prefix, curr, mode_str, hvmemul_ctxt->insn_buf_bytes,

Do you really need to print the byte count as a number when the
new formatting will suitably limit output anyway?

Jan


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