kvm: svm: Fix implicit declaration for __default_cpu_present_to_apicid()

The commit 8221c1370056 ("svm: Manage vcpu load/unload when enable AVIC")
introduces a build error due to implicit function declaration
when #ifdef CONFIG_X86_32 and #ifndef CONFIG_X86_LOCAL_APIC
(as reported by Kbuild test robot i386-randconfig-x0-06121009).

So, this patch introduces kvm_cpu_get_apicid() wrapper
around __default_cpu_present_to_apicid() with additional
handling if CONFIG_X86_LOCAL_APIC is not defined.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Fixes: commit 8221c1370056 ("svm: Manage vcpu load/unload when enable AVIC")
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e0fbe7e..69e6286 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -27,6 +27,7 @@
 #include <linux/irqbypass.h>
 #include <linux/hyperv.h>
 
+#include <asm/apic.h>
 #include <asm/pvclock-abi.h>
 #include <asm/desc.h>
 #include <asm/mtrr.h>
@@ -1368,4 +1369,14 @@ static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
 
 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
 
+static inline int kvm_cpu_get_apicid(int mps_cpu)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+       return __default_cpu_present_to_apicid(mps_cpu);
+#else
+       WARN_ON_ONCE(1);
+       return BAD_APICID;
+#endif
+}
+
 #endif /* _ASM_X86_KVM_HOST_H */

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 1163e81..8a3c571 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1324,7 +1324,7 @@ free_avic:
 static void avic_set_running(struct kvm_vcpu *vcpu, bool is_run)
 {
        u64 entry;
-       int h_physical_id = __default_cpu_present_to_apicid(vcpu->cpu);
+       int h_physical_id = kvm_cpu_get_apicid(vcpu->cpu);
        struct vcpu_svm *svm = to_svm(vcpu);
 
        if (!kvm_vcpu_apicv_active(vcpu))
@@ -1349,7 +1349,7 @@ static void avic_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 {
        u64 entry;
        /* ID = 0xff (broadcast), ID > 0xff (reserved) */
-       int h_physical_id = __default_cpu_present_to_apicid(cpu);
+       int h_physical_id = kvm_cpu_get_apicid(cpu);
        struct vcpu_svm *svm = to_svm(vcpu);
 
        if (!kvm_vcpu_apicv_active(vcpu))
@@ -4236,7 +4236,7 @@ static void svm_deliver_avic_intr(struct kvm_vcpu *vcpu, int vec)
 
        if (avic_vcpu_is_running(vcpu))
                wrmsrl(SVM_AVIC_DOORBELL,
-                      __default_cpu_present_to_apicid(vcpu->cpu));
+                      kvm_cpu_get_apicid(vcpu->cpu));
        else
                kvm_vcpu_wake_up(vcpu);
 }