From a02fd05661d73a8507dd70dd820e9b984490c545 Mon Sep 17 00:00:00 2001 From: Huacai Chen Date: Tue, 24 Jun 2025 14:29:27 +0800 Subject: [PATCH] PCI: Extend isolated function probing to LoongArch 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 189c6c33ff42 ("PCI: Extend isolated function probing to s390"). Signed-off-by: Huacai Chen Signed-off-by: Bjorn Helgaas Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250624062927.4037734-1-chenhuacai@loongson.cn --- include/linux/hypervisor.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/hypervisor.h b/include/linux/hypervisor.h index 9efbc54e35e59..be5417303ecf6 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(); } -- 2.47.2