Undo the bundling of the "host" and "guest" MSR auto-load list logic so that the code can be deduplicated by factoring out the logic to a separate helper. Now that "list full" situations are treated as fatal to the VM, there is no need to pre-check both lists. For all intents and purposes, this reverts the add_atomic_switch_msr() changes made by commit 3190709335dd ("x86/KVM/VMX: Separate the VMX AUTOLOAD guest/host number accounting"). Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/vmx.c | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index be2a2580e8f1..018e01daab68 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1096,9 +1096,9 @@ static __always_inline void add_atomic_switch_msr_special(struct vcpu_vmx *vmx, static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, u64 guest_val, u64 host_val) { - int i, j = 0; struct msr_autoload *m = &vmx->msr_autoload; struct kvm *kvm = vmx->vcpu.kvm; + int i; switch (msr) { case MSR_EFER: @@ -1133,25 +1133,26 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr, } i = vmx_find_loadstore_msr_slot(&m->guest, msr); - j = vmx_find_loadstore_msr_slot(&m->host, msr); - - if (KVM_BUG_ON(i < 0 && m->guest.nr == MAX_NR_LOADSTORE_MSRS, kvm) || - KVM_BUG_ON(j < 0 && m->host.nr == MAX_NR_LOADSTORE_MSRS, kvm)) - return; - if (i < 0) { + if (KVM_BUG_ON(m->guest.nr == MAX_NR_LOADSTORE_MSRS, kvm)) + return; + i = m->guest.nr++; m->guest.val[i].index = msr; vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->guest.nr); } m->guest.val[i].value = guest_val; - if (j < 0) { - j = m->host.nr++; - m->host.val[j].index = msr; + i = vmx_find_loadstore_msr_slot(&m->host, msr); + if (i < 0) { + if (KVM_BUG_ON(m->host.nr == MAX_NR_LOADSTORE_MSRS, kvm)) + return; + + i = m->host.nr++; + m->host.val[i].index = msr; vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->host.nr); } - m->host.val[j].value = host_val; + m->host.val[i].value = host_val; } static bool update_transition_efer(struct vcpu_vmx *vmx) -- 2.52.0.223.gf5cc29aaa4-goog