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

From: Filippo Sironi <sironi@amazon.de>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	borntraeger@de.ibm.com, boris.ostrovsky@oracle.com,
	cohuck@redhat.com, konrad.wilk@oracle.com,
	xen-devel@lists.xenproject.org, vasu.srinivasan@oracle.com
Cc: Filippo Sironi <sironi@amazon.de>
Subject: [PATCH v2 2/2] KVM: x86: Implement the arch-specific hook to report the VM UUID
Date: Tue, 14 May 2019 17:16:42 +0200	[thread overview]
Message-ID: <1557847002-23519-3-git-send-email-sironi__2594.01972159452$1557847888$gmane$org@amazon.de> (raw)
In-Reply-To: <1557847002-23519-1-git-send-email-sironi@amazon.de>

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

Signed-off-by: Filippo Sironi <sironi@amazon.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


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