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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2023-12-05 11:36:26 +0100 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-12-07 18:34:57 +0100 |
| commit | b4f69df0f65e97fec439130a0d0a8b9c7cc02df2 (patch) | |
| tree | 2d7e60178bfbd974c6a7eb361b0a1fb10918b60f /arch/x86/kvm/Kconfig | |
| parent | KVM: nVMX: Move guest_cpuid_has_evmcs() to hyperv.h (diff) | |
| download | linux-b4f69df0f65e97fec439130a0d0a8b9c7cc02df2.tar.xz linux-b4f69df0f65e97fec439130a0d0a8b9c7cc02df2.zip | |
KVM: x86: Make Hyper-V emulation optional
Hyper-V emulation in KVM is a fairly big chunk and in some cases it may be
desirable to not compile it in to reduce module sizes as well as the attack
surface. Introduce CONFIG_KVM_HYPERV option to make it possible.
Note, there's room for further nVMX/nSVM code optimizations when
!CONFIG_KVM_HYPERV, this will be done in follow-up patches.
Reorganize Makefile a bit so all CONFIG_HYPERV and CONFIG_KVM_HYPERV files
are grouped together.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Tested-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Link: https://lore.kernel.org/r/20231205103630.1391318-13-vkuznets@redhat.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/Kconfig')
| -rw-r--r-- | arch/x86/kvm/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index c1716e83d176..34f2f47cadf2 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -141,6 +141,20 @@ config KVM_SMM If unsure, say Y. +config KVM_HYPERV + bool "Support for Microsoft Hyper-V emulation" + depends on KVM + default y + help + Provides KVM support for emulating Microsoft Hyper-V. This allows KVM + to expose a subset of the paravirtualized interfaces defined in the + Hyper-V Hypervisor Top-Level Functional Specification (TLFS): + https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs + These interfaces are required for the correct and performant functioning + of Windows and Hyper-V guests on KVM. + + If unsure, say "Y". + config KVM_XEN bool "Support for Xen hypercall interface" depends on KVM |