Re: [PATCH] PCI: Extend isolated function probing to LoongArch

[Bjorn Helgaas <helgaas@kernel.org>]

On Tue, Jun 24, 2025 at 02:29:27PM +0800, Huacai Chen wrote:
> Like s390 and the jailhouse hypervisor, LoongArch's PCI architecture
> allows passing isolated PCI functions to a guest OS instance. So it is
> possible that there is a multi-function device without function 0 for
> the host or guest.
> 
> Allow probing such functions by adding a IS_ENABLED(CONFIG_LOONGARCH)
> case in the hypervisor_isolated_pci_functions() helper.
> 
> This is similar to commit 189c6c33ff421def040b9 ("PCI: Extend isolated
> function probing to s390").
> 
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

Applied to pci/enumeration for v6.17, thanks!

> ---
>  include/linux/hypervisor.h | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/include/linux/hypervisor.h b/include/linux/hypervisor.h
> index 9efbc54e35e5..be5417303ecf 100644
> --- a/include/linux/hypervisor.h
> +++ b/include/linux/hypervisor.h
> @@ -37,6 +37,9 @@ static inline bool hypervisor_isolated_pci_functions(void)
>  	if (IS_ENABLED(CONFIG_S390))
>  		return true;
>  
> +	if (IS_ENABLED(CONFIG_LOONGARCH))
> +		return true;
> +
>  	return jailhouse_paravirt();
>  }
>  
> -- 
> 2.47.1
>