[PATCH v4 09/26] KVM: Do processor compatibility check on resume

[isaku . yamahata]

From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

So far the processor compatibility check is not done on resume. It should
be done.  The resume is called for resuming from S3/S4.  CPUs can be
replaced or the kernel can resume from S4 on a different machine.  So
compatibility check is desirable.

Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
---
 virt/kvm/kvm_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 0ac00c711384..fc55447c4dba 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -5715,6 +5715,13 @@ static int kvm_suspend(void)
 
 static void kvm_resume(void)
 {
+	if (kvm_arch_check_processor_compat())
+		/*
+		 * No warning here because kvm_arch_check_processor_compat()
+		 * would have warned with more information.
+		 */
+		return; /* FIXME: disable KVM */
+
 	if (kvm_usage_count) {
 		lockdep_assert_not_held(&kvm_count_lock);
 		hardware_enable_nolock((void *)__func__);
-- 
2.25.1