Re: [tip:x86/urgent] x86/kconfig: Add a Kconfig shortcut for building working KVM guest kernels

Borislav Petkov
2013-05-02T20:05:12Z

On Thu, May 02, 2013 at 09:45:56PM +0200, Ingo Molnar wrote:
> Boris, mind posting a working version?

Yeah, let's delay it for the next merge window - it looks like it needs
more experimenting and since it is not urgent enough...

FWIW, I did play a bit with it today and I ended up with the diff below
just to satisfy the CONFIG_PCI/MSI deps. However, if I want to shut them
all up, I need to pull in SMP, MODULE_UNLOAD, MODULE... and so on.

Which is kind of an overkill and I really don't want to do it.

I wonder if one can exclude options from randconfig until 'select' has
been taught to resolve dependencies...

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 9dae342fa6f6..4c826ea8dd29 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -390,9 +390,10 @@ config X86_VSMP
bool "ScaleMP vSMP"
select HYPERVISOR_GUEST
select PARAVIRT
- depends on X86_64 && PCI
+ select PCI
+ select SMP
+ depends on X86_64
depends on X86_EXTENDED_PLATFORM
- depends on SMP
---help---
Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
supposed to run on these EM64T-based machines. Only choose this option
@@ -685,6 +686,7 @@ config KVM_GUEST_COMMON_OPTIONS
bool "Enable commodity options for a standalone KVM guest"
depends on KVM_GUEST
select NET
+ select NET_CORE
select NETDEVICES
select BLOCK
select BLK_DEV
@@ -697,6 +699,12 @@ config KVM_GUEST_COMMON_OPTIONS
select IP_PNP
select IP_PNP_DHCP
select BINFMT_ELF
+# select SMP
+# select MODULE_UNLOAD
+ select X86_LOCAL_APIC
+ select X86_IO_APIC
+ select ARCH_SUPPORTS_MSI
+ select PCI
select PCI_MSI
select HAVE_ARCH_KGDB
select DEBUG_KERNEL

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
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