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

Filippo Sironi
2019-05-14T15:17:59Z

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