linux-kernel - [PATCH 0/5] kvm: x86: better handling of NULL-able kvm_x86

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Date:   Wed,  2 Feb 2022 13:18:08 -0500
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     seanjc@...gle.com
Subject: [PATCH 0/5] kvm: x86: better handling of NULL-able kvm_x86_ops

This series is really two changes:

- patch 1 to 4 clean up NULLable kvm_x86_ops so that they are marked
  in kvm-x86-ops.h and the non-NULLable ones WARN if used incorrectly.
  As an additional outcome of the review, a few more uses of
  static_call_cond are introduced.

- patch 5 allows to NULL a few kvm_x86_ops that return a value, by
  using __static_call_ret0.

Paolo Bonzini (5):
  KVM: x86: use static_call_cond for optional callbacks
  KVM: x86: mark NULL-able kvm_x86_ops
  KVM: x86: warn on incorrectly NULL static calls
  KVM: x86: change hwapic_{irr,isr}_update to NULLable calls
  KVM: x86: allow defining return-0 static calls

 arch/x86/include/asm/kvm-x86-ops.h | 45 +++++++++++++++---------------
 arch/x86/include/asm/kvm_host.h    |  9 ++++--
 arch/x86/kvm/lapic.c               | 22 ++++++---------
 arch/x86/kvm/svm/avic.c            | 13 ---------
 arch/x86/kvm/svm/svm.c             | 28 -------------------
 arch/x86/kvm/x86.c                 | 10 ++-----
 6 files changed, 41 insertions(+), 86 deletions(-)

-- 
2.31.1