* [PATCH v2] KVM: SVM: Dump Virtual Machine Save Area (VMSA) to klog
@ 2022-07-29 12:21 Jarkko Sakkinen
0 siblings, 0 replies; only message in thread
From: Jarkko Sakkinen @ 2022-07-29 12:21 UTC (permalink / raw)
To: Paolo Bonzini
Cc: Jarkko Sakkinen, Jarkko Sakkinen, Harald Hoyer,
Sean Christopherson, Thomas Gleixner, Ingo Molnar,
Borislav Petkov, Dave Hansen,
maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT),
H. Peter Anvin,
open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86),
open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)
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@kernel.org>
Suggested-by: Harald Hoyer <harald@profian.com>
Signed-off-by: Jarkko Sakkinen <jarkko@profian.com>
---
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
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