On 08/02/2019 03:06 PM, Sean Christopherson wrote:
Remove a few stale checks for non-NULL ops now that the ops in question
are implemented by both VMX and SVM.

Note, this is **not** stable material, the Fixes tags are there purely
to show when a particular op was first supported by both VMX and SVM.

Fixes: 74f169090b6f ("kvm/svm: Setup MCG_CAP on AMD properly")
Fixes: b31c114b82b2 ("KVM: X86: Provide a capability to disable PAUSE 
intercepts")
Fixes: 411b44ba80ab ("svm: Implements update_pi_irte hook to setup posted 
interrupt")
Cc: Krish Sadhukhan <krish.sadhuk...@oracle.com>
Signed-off-by: Sean Christopherson <sean.j.christopher...@intel.com>
---

v2: Give update_pi_iret the same treatment [Krish].

  arch/x86/kvm/x86.c | 13 +++----------
  1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 01e18caac825..e7c993f0cbed 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3506,8 +3506,7 @@ static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu 
*vcpu,
        for (bank = 0; bank < bank_num; bank++)
                vcpu->arch.mce_banks[bank*4] = ~(u64)0;
- if (kvm_x86_ops->setup_mce)
-               kvm_x86_ops->setup_mce(vcpu);
+       kvm_x86_ops->setup_mce(vcpu);
  out:
        return r;
  }
@@ -9313,10 +9312,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
        kvm_page_track_init(kvm);
        kvm_mmu_init_vm(kvm);
- if (kvm_x86_ops->vm_init)
-               return kvm_x86_ops->vm_init(kvm);
-
-       return 0;
+       return kvm_x86_ops->vm_init(kvm);
  }
static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
@@ -9992,7 +9988,7 @@ EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma);
bool kvm_arch_has_irq_bypass(void)

Now that this is returning true always and that this is called only in kvm_irqfd_assign(), this can perhaps be removed altogether ?

  {
-       return kvm_x86_ops->update_pi_irte != NULL;
+       return true;
  }
int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
@@ -10032,9 +10028,6 @@ void kvm_arch_irq_bypass_del_producer(struct 
irq_bypass_consumer *cons,
  int kvm_arch_update_irqfd_routing(struct kvm *kvm, unsigned int host_irq,
                                   uint32_t guest_irq, bool set)
  {
-       if (!kvm_x86_ops->update_pi_irte)
-               return -EINVAL;
-
        return kvm_x86_ops->update_pi_irte(kvm, host_irq, guest_irq, set);
  }

Reviewed-by: Krish Sadhukhan <krish.sadhuk...@oracle.com>

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