6.12-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
commit a02fd05661d73a8507dd70dd820e9b984490c545 upstream.
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 chenhuacai@loongson.cn Signed-off-by: Bjorn Helgaas bhelgaas@google.com Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20250624062927.4037734-1-chenhuacai@loongson.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/hypervisor.h | 3 +++ 1 file changed, 3 insertions(+)
--- a/include/linux/hypervisor.h +++ b/include/linux/hypervisor.h @@ -37,6 +37,9 @@ static inline bool hypervisor_isolated_p if (IS_ENABLED(CONFIG_S390)) return true;
+ if (IS_ENABLED(CONFIG_LOONGARCH)) + return true; + return jailhouse_paravirt(); }