[RFC PATCH 4/6] x86/Hyper-V: Allow Hyper-V to inject Hyper-V vectors

[Tianyu Lan <ltykernel@gmail.com>]

From: Tianyu Lan <tiala@microsoft.com>

When Secure AVIC is enabled, call Secure AVIC
function to allow Hyper-V to inject REENLIGHTENMENT,
STIMER0 and CALLBACK vectors.

Signed-off-by: Tianyu Lan <tiala@microsoft.com>
---
 arch/x86/hyperv/hv_init.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index ddeb40930bc8..d75df5c3965d 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -131,6 +131,18 @@ static int hv_cpu_init(unsigned int cpu)
 		wrmsrl(HV_X64_MSR_VP_ASSIST_PAGE, msr.as_uint64);
 	}
 
+	/* Allow Hyper-V vector to be injected from Hypervisor. */
+	if (ms_hyperv.features & HV_ACCESS_REENLIGHTENMENT)
+		x2apic_savic_update_vector(cpu,
+					   HYPERV_REENLIGHTENMENT_VECTOR, true);
+
+	if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE)
+		x2apic_savic_update_vector(cpu,
+					   HYPERV_STIMER0_VECTOR, true);
+
+	x2apic_savic_update_vector(cpu, HYPERVISOR_CALLBACK_VECTOR, true);
+
+
 	return hyperv_init_ghcb();
 }
 
-- 
2.25.1