x86/hyper-v: detect nested features

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TLFS 5.0 says: "Support for an enlightened VMCS interface is reported with
CPUID leaf 0x40000004. If an enlightened VMCS interface is supported,
 additional nested enlightenments may be discovered by reading the CPUID
leaf 0x4000000A (see 2.4.11)."

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

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Vitaly Kuznetsov 2018-03-20 15:02:10 +01:00 • committed by Radim Krčmář

parent 68d1eb72ee

commit 5431390b30

3 changed files with 10 additions and 0 deletions

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4

arch/x86/include/asm/hyperv-tlfs.h

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arch/x86/include/asm/mshyperv.h

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5

arch/x86/kernel/cpu/mshyperv.c

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