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>
---
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
