linux-kernel - [PATCH v2 0/6] KVM: x86: cleanup and speedup for APICv

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Message-Id: <1482164232-130035-1-git-send-email-pbonzini@redhat.com>
Date:   Mon, 19 Dec 2016 17:17:06 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: [PATCH v2 0/6] KVM: x86: cleanup and speedup for APICv

These are the fixed patches that now pass vmx.flat.  The issue in
"KVM: x86: do not scan IRR twice on APICv vmentry" was that,
in v1 of the patches, kvm_cpu_get_interrupt did not scan IRR
at all if it found PIR.ON=0.  This is now fixed in patches 4 and 5.

Another latent bug has to be fixed in patch 2.  The patch also
highlights the maze that check_nested_events has become.  Fixing
that is left for later.

The patches are on top of the (non-APICv-related) KVM_REQ_EVENT
patches from this morning.  According to kvm-unit-tests, patch 6 speeds
up self-IPIs (if not done through the accelerated self-IPI MSR) by 5-10%.

Paolo

Paolo Bonzini (6):
  KVM: vmx: clear pending interrupts on KVM_SET_LAPIC
  kvm: nVMX: move nested events check to kvm_vcpu_running
  KVM: x86: preparatory changes for APICv cleanups
  KVM: vmx: move sync_pir_to_irr from apic_find_highest_irr to callers
  KVM: x86: do not scan IRR twice on APICv vmentry
  kvm: x86: do not use KVM_REQ_EVENT for APICv interrupt injection

 arch/x86/include/asm/kvm_host.h |  2 +-
 arch/x86/kvm/lapic.c            | 42 ++++++++++++++++++-------------
 arch/x86/kvm/lapic.h            |  4 +--
 arch/x86/kvm/svm.c              |  6 -----
 arch/x86/kvm/vmx.c              | 55 +++++++++++++++++++++++++++--------------
 arch/x86/kvm/x86.c              | 53 +++++++++++++++++++++------------------
 6 files changed, 93 insertions(+), 69 deletions(-)

-- 
1.8.3.1