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Re: [PATCH v3] xen: Remove dependency between pciback and privcmd


  • To: Jiqian Chen <Jiqian.Chen@xxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Fri, 11 Oct 2024 10:54:39 +0200
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  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
  • Delivery-date: Fri, 11 Oct 2024 08:54:46 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 11.10.2024 05:42, Jiqian Chen wrote:
> @@ -1757,11 +1756,19 @@ static int __init xen_pcibk_init(void)
>               bus_register_notifier(&pci_bus_type, &pci_stub_nb);
>  #endif
>  
> +#ifdef CONFIG_XEN_ACPI
> +     xen_acpi_register_get_gsi_func(pcistub_get_gsi_from_sbdf);
> +#endif
> +
>       return err;
>  }
>  
>  static void __exit xen_pcibk_cleanup(void)
>  {
> +#ifdef CONFIG_XEN_ACPI
> +     xen_acpi_register_get_gsi_func(NULL);
> +#endif

Just wondering - instead of these two #ifdef-s, ...

> --- a/include/xen/acpi.h
> +++ b/include/xen/acpi.h
> @@ -91,13 +91,9 @@ static inline int xen_acpi_get_gsi_info(struct pci_dev 
> *dev,
>  }
>  #endif
>  
> -#ifdef CONFIG_XEN_PCI_STUB
> -int pcistub_get_gsi_from_sbdf(unsigned int sbdf);
> -#else
> -static inline int pcistub_get_gsi_from_sbdf(unsigned int sbdf)
> -{
> -     return -1;
> -}
> -#endif
> +typedef int (*get_gsi_from_sbdf_t)(u32 sbdf);
> +
> +void xen_acpi_register_get_gsi_func(get_gsi_from_sbdf_t func);
> +int xen_acpi_get_gsi_from_sbdf(u32 sbdf);

... wouldn't a static inline stub (for the !XEN_ACPI case) aid overall 
readability?

Jan



 


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