On Fri, 2026-05-15 at 12:19 -0700, Sean Christopherson wrote: > Add a return code to __paravirt_set_sched_clock() so that the kernel can > reject attempts to use a PV sched_clock without breaking the caller. E.g. > when running as a CoCo VM with a secure TSC, using a PV clock is generally > undesirable. > > Note, kvmclock is the only PV clock that does anything "extra" beyond > simply registering itself as sched_clock, i.e. is the only caller that > needs to check the new return value. > > Signed-off-by: Sean Christopherson <[email protected]>
Oooh... can we use this to reject the kvmclock when we have a stable and reliable TSC even for non-CoCo guests? Reviewed-by: David Woodhouse <[email protected]>
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