[PATCH v4 13/17] KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c

[Sean Christopherson <seanjc@xxxxxxxxxx>]

Now that all state needed for VMX's PT interrupt handler is exposed to
vmx.c (specifically the currently running vCPU), move the handler into
vmx.c where it belongs.

Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
 arch/x86/include/asm/kvm_host.h |  2 +-
 arch/x86/kvm/vmx/vmx.c          | 22 +++++++++++++++++++++-
 arch/x86/kvm/x86.c              | 20 +-------------------
 3 files changed, 23 insertions(+), 21 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index ec16f645cb8c..621bedff0aa5 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1515,7 +1515,7 @@ struct kvm_x86_init_ops {
        int (*disabled_by_bios)(void);
        int (*check_processor_compatibility)(void);
        int (*hardware_setup)(void);
-       bool (*intel_pt_intr_in_guest)(void);
+       unsigned int (*handle_intel_pt_intr)(void);
 
        struct kvm_x86_ops *runtime_ops;
 };
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 36098eb9a7f9..7cb7f261f7dc 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7708,6 +7708,20 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
        .vcpu_deliver_sipi_vector = kvm_vcpu_deliver_sipi_vector,
 };
 
+static unsigned int vmx_handle_intel_pt_intr(void)
+{
+       struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
+
+       /* '0' on failure so that the !PT case can use a RET0 static call. */
+       if (!kvm_arch_pmi_in_guest(vcpu))
+               return 0;
+
+       kvm_make_request(KVM_REQ_PMI, vcpu);
+       __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
+                 (unsigned long *)&vcpu->arch.pmu.global_status);
+       return 1;
+}
+
 static __init void vmx_setup_user_return_msrs(void)
 {
 
@@ -7734,6 +7748,8 @@ static __init void vmx_setup_user_return_msrs(void)
                kvm_add_user_return_msr(vmx_uret_msrs_list[i]);
 }
 
+static struct kvm_x86_init_ops vmx_init_ops __initdata;
+
 static __init int hardware_setup(void)
 {
        unsigned long host_bndcfgs;
@@ -7892,6 +7908,10 @@ static __init int hardware_setup(void)
                return -EINVAL;
        if (!enable_ept || !cpu_has_vmx_intel_pt())
                pt_mode = PT_MODE_SYSTEM;
+       if (pt_mode == PT_MODE_HOST_GUEST)
+               vmx_init_ops.handle_intel_pt_intr = vmx_handle_intel_pt_intr;
+       else
+               vmx_init_ops.handle_intel_pt_intr = NULL;
 
        setup_default_sgx_lepubkeyhash();
 
@@ -7920,7 +7940,7 @@ static struct kvm_x86_init_ops vmx_init_ops __initdata = {
        .disabled_by_bios = vmx_disabled_by_bios,
        .check_processor_compatibility = vmx_check_processor_compat,
        .hardware_setup = hardware_setup,
-       .intel_pt_intr_in_guest = vmx_pt_mode_is_host_guest,
+       .handle_intel_pt_intr = NULL,
 
        .runtime_ops = &vmx_x86_ops,
 };
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bafd2e78ad04..a4d25d0587e6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8410,20 +8410,6 @@ static void kvm_timer_init(void)
                          kvmclock_cpu_online, kvmclock_cpu_down_prep);
 }
 
-static unsigned int kvm_handle_intel_pt_intr(void)
-{
-       struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
-       /* '0' on failure so that the !PT case can use a RET0 static call. */
-       if (!kvm_arch_pmi_in_guest(vcpu))
-               return 0;
-
-       kvm_make_request(KVM_REQ_PMI, vcpu);
-       __set_bit(MSR_CORE_PERF_GLOBAL_OVF_CTRL_TRACE_TOPA_PMI_BIT,
-                       (unsigned long *)&vcpu->arch.pmu.global_status);
-       return 1;
-}
-
 #ifdef CONFIG_X86_64
 static void pvclock_gtod_update_fn(struct work_struct *work)
 {
@@ -11116,11 +11102,7 @@ int kvm_arch_hardware_setup(void *opaque)
        memcpy(&kvm_x86_ops, ops->runtime_ops, sizeof(kvm_x86_ops));
        kvm_ops_static_call_update();
 
-       /* Temporary ugliness. */
-       if (ops->intel_pt_intr_in_guest && ops->intel_pt_intr_in_guest())
-               kvm_register_perf_callbacks(kvm_handle_intel_pt_intr);
-       else
-               kvm_register_perf_callbacks(NULL);
+       kvm_register_perf_callbacks(ops->handle_intel_pt_intr);
 
        if (!kvm_cpu_cap_has(X86_FEATURE_XSAVES))
                supported_xss = 0;
-- 
2.34.0.rc0.344.g81b53c2807-goog