diff options
| author | Dexuan Cui <[email protected]> | 2018-09-18 22:29:50 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-09-27 21:19:14 +0200 |
| commit | 2f285f46240d67060061d153786740d4df53cd78 (patch) | |
| tree | b959e08f5aa07d418e912449aafbec803e81a3ac | |
| parent | c307aaf3eb47969105887e4e8991ec00960a7ce8 (diff) | |
x86/hyperv: Suppress "PCI: Fatal: No config space access function found"
A Generation-2 Linux VM on Hyper-V doesn't have the legacy PCI bus, and
users always see the scary warning, which is actually harmless.
Suppress it.
Signed-off-by: Dexuan Cui <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Michael Kelley <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: KY Srinivasan <[email protected]>
Cc: Haiyang Zhang <[email protected]>
Cc: Stephen Hemminger <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: Olaf Aepfle <[email protected]>
Cc: Andy Whitcroft <[email protected]>
Cc: Jason Wang <[email protected]>
Cc: Vitaly Kuznetsov <[email protected]>
Cc: Marcelo Cerri <[email protected]>
Cc: Josh Poulson <[email protected]>
Link: https://lkml.kernel.org/r/ <KU1P153MB0166D977DC930996C4BF538ABF1D0@KU1P153MB0166.APCP153.PROD.OUTLOOK.COM
| -rw-r--r-- | arch/x86/hyperv/hv_init.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 20c876c7c5bf..7abb09e2eeb8 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -17,6 +17,7 @@ * */ +#include <linux/efi.h> #include <linux/types.h> #include <asm/apic.h> #include <asm/desc.h> @@ -253,6 +254,22 @@ static int hv_cpu_die(unsigned int cpu) return 0; } +static int __init hv_pci_init(void) +{ + int gen2vm = efi_enabled(EFI_BOOT); + + /* + * For Generation-2 VM, we exit from pci_arch_init() by returning 0. + * The purpose is to suppress the harmless warning: + * "PCI: Fatal: No config space access function found" + */ + if (gen2vm) + return 0; + + /* For Generation-1 VM, we'll proceed in pci_arch_init(). */ + return 1; +} + /* * This function is to be invoked early in the boot sequence after the * hypervisor has been detected. @@ -329,6 +346,8 @@ void __init hyperv_init(void) hv_apic_init(); + x86_init.pci.arch_init = hv_pci_init; + /* * Register Hyper-V specific clocksource. */ |