From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 28 Sep 2015 09:58:14 +0000 (+0200)
Subject: KVM: vmx: disable posted interrupts if no local APIC
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d6a858d13e5d02b97daab5ba0648c704ae3f9517;p=linux-beck.git

KVM: vmx: disable posted interrupts if no local APIC

Uniprocessor 32-bit randconfigs can disable the local APIC, and posted
interrupts require reserving a vector on the LAPIC, so they are
incompatible.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 324b09ff1def..0f15e2382109 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -983,7 +983,8 @@ static inline bool cpu_has_vmx_virtual_intr_delivery(void)
 
 static inline bool cpu_has_vmx_posted_intr(void)
 {
-	return vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR;
+	return IS_ENABLED(CONFIG_X86_LOCAL_APIC) &&
+		vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR;
 }
 
 static inline bool cpu_has_vmx_apicv(void)