[RFC PATCH 6/6] x86/x2apic-savic: Not set APIC backing page if Secure AVIC is not enabled.

[Tianyu Lan <ltykernel@gmail.com>]

From: Tianyu Lan <tiala@microsoft.com>

When Secure AVIC is not enabled, init_apic_page()
should return directly.

Signed-off-by: Tianyu Lan <tiala@microsoft.com>
---
 arch/x86/kernel/apic/x2apic_savic.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kernel/apic/x2apic_savic.c b/arch/x86/kernel/apic/x2apic_savic.c
index 0dd7e39931b0..fb09c0f9e276 100644
--- a/arch/x86/kernel/apic/x2apic_savic.c
+++ b/arch/x86/kernel/apic/x2apic_savic.c
@@ -333,6 +333,9 @@ static void init_apic_page(void)
 {
 	u32 apic_id;
 
+	if (!cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
+		return;
+
 	/*
 	 * Before Secure AVIC is enabled, APIC msr reads are intercepted.
 	 * APIC_ID msr read returns the value from the Hypervisor.
-- 
2.25.1