linux-kernel - [PATCH v2 2/2] KVM: x86: Implement the arch-specific hook to report the VM UUID

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Date:   Tue, 14 May 2019 17:16:42 +0200
From:   Filippo Sironi <sironi@...zon.de>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        borntraeger@...ibm.com, boris.ostrovsky@...cle.com,
        cohuck@...hat.com, konrad.wilk@...cle.com,
        xen-devel@...ts.xenproject.org, vasu.srinivasan@...cle.com
Cc:     Filippo Sironi <sironi@...zon.de>
Subject: [PATCH v2 2/2] KVM: x86: Implement the arch-specific hook to report the VM UUID

On x86, we report the UUID in DMI System Information (i.e., DMI Type 1)
as VM UUID.

Signed-off-by: Filippo Sironi <sironi@...zon.de>
---
 arch/x86/kernel/kvm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 5c93a65ee1e5..441cab08a09d 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -25,6 +25,7 @@
 #include <linux/kernel.h>
 #include <linux/kvm_para.h>
 #include <linux/cpu.h>
+#include <linux/dmi.h>
 #include <linux/mm.h>
 #include <linux/highmem.h>
 #include <linux/hardirq.h>
@@ -694,6 +695,12 @@ bool kvm_para_available(void)
 }
 EXPORT_SYMBOL_GPL(kvm_para_available);
 
+const char *kvm_para_get_uuid(void)
+{
+	return dmi_get_system_info(DMI_PRODUCT_UUID);
+}
+EXPORT_SYMBOL_GPL(kvm_para_get_uuid);
+
 unsigned int kvm_arch_para_features(void)
 {
 	return cpuid_eax(kvm_cpuid_base() | KVM_CPUID_FEATURES);
-- 
2.7.4