diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 038581e91a84..7741e211f7f5 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -180,6 +180,13 @@
 /* Recommend using enlightened VMCS */
 #define HV_X64_ENLIGHTENED_VMCS_RECOMMENDED		BIT(14)
 
+/*
+ * Virtual processor will never share a physical core with another virtual
+ * processor, except for virtual processors that are reported as sibling SMT
+ * threads.
+ */
+#define HV_X64_NO_NONARCH_CORESHARING                  BIT(18)
+
 /* Nested features. These are HYPERV_CPUID_NESTED_FEATURES.EAX bits. */
 #define HV_X64_NESTED_DIRECT_FLUSH			BIT(17)
 #define HV_X64_NESTED_GUEST_MAPPING_FLUSH		BIT(18)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index c0867b0aae3e..23ff65504d7e 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -23,6 +23,7 @@
 #include "ioapic.h"
 #include "hyperv.h"
 
+#include <linux/cpu.h>
 #include <linux/kvm_host.h>
 #include <linux/highmem.h>
 #include <linux/sched/cputime.h>
@@ -1872,7 +1873,8 @@ int kvm_vcpu_ioctl_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 			ent->eax |= HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED;
 			if (evmcs_ver)
 				ent->eax |= HV_X64_ENLIGHTENED_VMCS_RECOMMENDED;
-
+			if (!cpu_smt_possible())
+				ent->eax |= HV_X64_NO_NONARCH_CORESHARING;
 			/*
 			 * Default number of spinlock retry attempts, matches
 			 * HyperV 2016.