From: Jan Beulich <jbeulich@suse.com>
Date: Fri, 3 Dec 2021 10:17:50 +0000 (+0100)
Subject: x86/HVM: skip offline vCPU-s when dumping VMCBs/VMCSes
X-Git-Tag: archive/raspbian/4.17.0-1+rpi1^2~33^2~1284
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3c42cc803c2163daa199021852224b9ca476e9c5;p=xen.git

x86/HVM: skip offline vCPU-s when dumping VMCBs/VMCSes

There's not really any register state associated with vCPU-s that
haven't been initialized yet, so avoid spamming the log with largely
useless information while still leaving an indication of the fact.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
---

diff --git a/xen/arch/x86/hvm/svm/vmcb.c b/xen/arch/x86/hvm/svm/vmcb.c
index 565e997155..efa085032b 100644
--- a/xen/arch/x86/hvm/svm/vmcb.c
+++ b/xen/arch/x86/hvm/svm/vmcb.c
@@ -242,6 +242,11 @@ static void vmcb_dump(unsigned char ch)
         printk("\n>>> Domain %d <<<\n", d->domain_id);
         for_each_vcpu ( d, v )
         {
+            if ( !v->is_initialised )
+            {
+                printk("\tVCPU %u: not initialized\n", v->vcpu_id);
+                continue;
+            }
             printk("\tVCPU %d\n", v->vcpu_id);
             svm_vmcb_dump("key_handler", v->arch.hvm.svm.vmcb);
         }
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index f9f9bc18cd..7ab15e07a0 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -2133,6 +2133,11 @@ static void vmcs_dump(unsigned char ch)
         printk("\n>>> Domain %d <<<\n", d->domain_id);
         for_each_vcpu ( d, v )
         {
+            if ( !v->is_initialised )
+            {
+                printk("\tVCPU %u: not initialized\n", v->vcpu_id);
+                continue;
+            }
             printk("\tVCPU %d\n", v->vcpu_id);
             vmcs_dump_vcpu(v);
         }