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PCI: Extend isolated function probing to LoongArch

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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: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
Huacai Chen
2025-11-10 08:55:32 +08:00
committed by maoxiaochuan
parent 7d78e8df51
commit 7daffe817e
1 changed files with 3 additions and 0 deletions
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include/linux/hypervisor.h
+3
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@@ -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();
}