Re: [PATCH] kvm: kvmclock: let KVM_GET_CLOCK return whether the master clock is in use
From: Radim KrÄmÃÅ
Date: Sat Nov 19 2016 - 14:34:42 EST
2016-11-09 17:48+0100, Paolo Bonzini:
> Userspace can read the exact value of kvmclock by reading the TSC
> and fetching the timekeeping parameters out of guest memory. This
> however is brittle and not necessary anymore with KVM 4.11. Provide
> a mechanism that lets userspace know if the new KVM_GET_CLOCK
> semantics are in effect, and---since we are at it---if the clock
> is stable across all VCPUs.
> Cc: Radim KrÄmÃÅ <rkrcmar@xxxxxxxxxx>
> Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Applied to kvm/master, thanks.