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@xxxxxxxxxxxxxxx>
> Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
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
>
