Re: [Xen-devel] [PATCH] x86/vpmu: fix vpmu can't enabled in guest

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 14.02.17 at 03:19, <luwei.kang@xxxxxxxxx> wrote:
> vpmu_enable() can not use for check if vpmu is enabled in guest during
> booting up. Because linux kernel get the status of if supported pmu
> is earler than xen vpmu initialise. vpmu_enable() will return false
> even if vpmu has been enabled in guest.
> 
> Signed-off-by: Luwei Kang <luwei.kang@xxxxxxxxx>

You've probably seen Boris' patch with the same overall goal. While
his looks to leave things a little too strict, yours looks to be widening
things a little too much. Do both of you think we could find a middle
ground, or do we need to accept the effect of possibly misleading
the guest by surfacing the CPUID data independent of vPMU mode,
as is done here?

Jan


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