From: Tianyu Lan <ltykernel@gmail.com>
Date: Thu, 18 Sep 2025 15:00:19 +0000 (-0400)
Subject: x86/hyperv: Don't use hv apic driver when Secure AVIC is available
X-Git-Tag: v6.19-rc1~56^2~55
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f34f5e576f5e17de5591c9ae306aeab2911d8533;p=thirdparty%2Fkernel%2Flinux.git

x86/hyperv: Don't use hv apic driver when Secure AVIC is available

When Secure AVIC is available, the AMD x2apic Secure
AVIC driver will be selected. In that case, have
hv_apic_init() return immediately without doing
anything.

Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---

diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index bfde0a3498b90..e669053b637d6 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -293,6 +293,9 @@ static void hv_send_ipi_self(int vector)
 
 void __init hv_apic_init(void)
 {
+	if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
+		return;
+
 	if (ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) {
 		pr_info("Hyper-V: Using IPI hypercalls\n");
 		/*