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    KVM: x86: Fold decache_cr3() into cache_reg() · 34059c25
    Sean Christopherson 提交于
    Handle caching CR3 (from VMX's VMCS) into struct kvm_vcpu via the common
    cache_reg() callback and drop the dedicated decache_cr3().  The name
    decache_cr3() is somewhat confusing as the caching behavior of CR3
    follows that of GPRs, RFLAGS and PDPTRs, (handled via cache_reg()), and
    has nothing in common with the caching behavior of CR0/CR4 (whose
    decache_cr{0,4}_guest_bits() likely provided the 'decache' verbiage).
    
    This would effectivel adds a BUG() if KVM attempts to cache CR3 on SVM.
    Change it to a WARN_ON_ONCE() -- if the cache never requires filling,
    the value is already in the right place -- and opportunistically add one
    in VMX to provide an equivalent check.
    Signed-off-by: NSean Christopherson <sean.j.christopherson@intel.com>
    Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
    34059c25
kvm_cache_regs.h 4.7 KB