Messages in this thread | | | Subject | Re: [PATCH v2 2/2] KVM: x86: Implement the arch-specific hook to report the VM UUID | From | Alexander Graf <> | Date | Thu, 16 May 2019 06:56:01 -0700 |
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On 14.05.19 08:16, Filippo Sironi wrote: > 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);
This adds a new dependency on CONFIG_DMI. Probably best to guard it with an #if IS_ENABLED(CONFIG_DMI).
The concept seems sound though.
Alex
> +} > +EXPORT_SYMBOL_GPL(kvm_para_get_uuid); > + > unsigned int kvm_arch_para_features(void) > { > return cpuid_eax(kvm_cpuid_base() | KVM_CPUID_FEATURES); >
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