On Wed, 2012-10-10 at 15:47 +0100, Stefano Stabellini wrote: > On Wed, 10 Oct 2012, Ian Campbell wrote: > > On Tue, 2012-10-09 at 19:21 +0100, Arnd Bergmann wrote: > > > On Tuesday 09 October 2012, Stefano Stabellini wrote: > > > > > config XEN > > > > > bool "Xen guest support on ARM (EXPERIMENTAL)" > > > > > depends on EXPERIMENTAL && ARM && OF > > > > > + depends on !CPU_V6 > > > > > help > > > > > Say Y if you want to run Linux in a Virtual Machine on Xen on > > > > > ARM. > > > > > > > > Considering that we rely on the virtualization extensions, this one can > > > > be: > > > > > > > > depends on CPU_V7 > > > > > > > > The rest looks fine. I can submit a second patch to change !CPU_V6 into > > > > CPU_V7 later, if you prefer. > > > > > > CPU_V6 and CPU_V7 are not exclusive, I saw the problem when building a > > > combined kernel for both V6 and V7. The code also needs to depend on ARMv7 > > > with virtualization extensions, but that is a different issue. We don't > > > actually have a configuration symbol for that yet, as far as I can tell. > > > > I don't think the guest kernels (including dom0) need the extensions to > > run under Xen, they are only need by Xen itself. The guests should just > > see a relatively normal v7 processor. > > > > Stefano, does that sound right? > > Keep in mind that we are using HVC to issue hypercalls, and HVC has been > introduced with the virtualization extensions, if I am not mistaken.
I think we can ignore that in this context since it is only used by bits which are already virtualisation aware -- i.e. you wouldn't want to add it to the Kconfig as a dependency for Xen. Ian. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
