linux-kernel - [PATCH v2 0/2] if running under KVM, use kvmclock to compute TSC deadline value

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Date:   Wed,  7 Sep 2016 00:29:57 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     rkrcmar@...hat.com, dmatlack@...gle.com, luto@...nel.org,
        peterhornyack@...gle.com, x86@...nel.org
Subject: [PATCH v2 0/2] if running under KVM, use kvmclock to compute TSC deadline value

v1 posted here: https://patchwork.kernel.org/patch/9214993/

The motivation for this patch is in patch 2 (or you can read it from v1).

This version is larger but the hooks into apic.c are cleaner than in
v1.  Instead of arranging for kvmclock to replace only a small part of
setup_apic_timer, it registers its own clockevent.  The downside is that
kvmclock now needs to hook into the LAPIC timer interrupt to invoke the
event_handler of the new clockevent, but this is pretty straightforward
with a new pvop (assuming the introduction of new pvops is straightforward
at all).

Thanks,

Paolo

Paolo Bonzini (2):
  x86: paravirt: add local_apic_timer_interrupt to pv_ops
  x86, kvm: use kvmclock to compute TSC deadline value

 arch/x86/include/asm/apic.h           |   2 +
 arch/x86/include/asm/paravirt.h       |   5 ++
 arch/x86/include/asm/paravirt_types.h |   1 +
 arch/x86/kernel/apic/apic.c           |   4 +-
 arch/x86/kernel/kvmclock.c            | 156 ++++++++++++++++++++++++++++++++++
 arch/x86/kernel/paravirt.c            |   1 +
 6 files changed, 167 insertions(+), 2 deletions(-)

-- 
1.8.3.1