[PATCH v2] KVM: SVM: Dump Virtual Machine Save Area (VMSA) to klog

[Jarkko Sakkinen]

As Virtual Machine Save Area (VMSA) is essential in troubleshooting
attestation, dump it to the klog with the KERN_DEBUG level of priority.

Cc: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Suggested-by: Harald Hoyer <harald@xxxxxxxxxxx>
Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 0c240ed04f96..c91a905436d5 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -603,6 +603,10 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm)
 	save->xss  = svm->vcpu.arch.ia32_xss;
 	save->dr6  = svm->vcpu.arch.dr6;
 
+	if (printk_ratelimit()) {
+		print_hex_dump(KERN_DEBUG, "VMSA", DUMP_PREFIX_NONE, 16, 1, save, sizeof(*save), false);
+	}
+
 	return 0;
 }
 
-- 
v2:
- Use KERN_DEBUG for print_hex_dump()
- Check for ratelimit.
2.37.1