linux-kernel - [PATCH 0/7] KVM: x86: Clean up MSR_IA32_APICBASE

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Message-ID: <20241009181742.1128779-1-seanjc@google.com>
Date: Wed,  9 Oct 2024 11:17:34 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/7] KVM: x86: Clean up MSR_IA32_APICBASE_BASE code

Clean up code related to setting and getting MSR_IA32_APICBASE_BASE.

E.g. it's absurdly difficult to tease out that kvm_set_apic_base() exists
purely to avoid an extra call to kvm_recalculate_apic_map() (which may or
may not be worth the code, but whatever).

Simiarly, it's quite difficult to see that kvm_lapic_set_base() doesn't
do anything useful if the incoming MSR value is the same as the current
value.

Sean Christopherson (7):
  KVM: x86: Short-circuit all kvm_lapic_set_base() if MSR value isn't
    changing
  KVM: x86: Drop superfluous kvm_lapic_set_base() call when setting APIC
    state
  KVM: x86: Get vcpu->arch.apic_base directly and drop
    kvm_get_apic_base()
  KVM: x86: Inline kvm_get_apic_mode() in lapic.h
  KVM: x86: Move kvm_set_apic_base() implementation to lapic.c (from
    x86.c)
  KVM: x86: Rename APIC base setters to better capture their
    relationship
  KVM: x86: Make kvm_recalculate_apic_map() local to lapic.c

 arch/x86/kvm/lapic.c | 31 +++++++++++++++++++++++++++----
 arch/x86/kvm/lapic.h | 11 ++++++-----
 arch/x86/kvm/x86.c   | 42 +++++-------------------------------------
 3 files changed, 38 insertions(+), 46 deletions(-)


base-commit: 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b
-- 
2.47.0.rc1.288.g06298d1525-goog