diff options
Diffstat (limited to 'arch/x86/kvm/Kconfig')
| -rw-r--r-- | arch/x86/kvm/Kconfig | 93 |
1 files changed, 71 insertions, 22 deletions
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig index 950c12868d30..ea2c4f21c1ca 100644 --- a/arch/x86/kvm/Kconfig +++ b/arch/x86/kvm/Kconfig @@ -7,7 +7,6 @@ source "virt/kvm/Kconfig" menuconfig VIRTUALIZATION bool "Virtualization" - depends on HAVE_KVM || X86 default y help Say Y here to get to see options for using your Linux host to run other @@ -18,22 +17,19 @@ menuconfig VIRTUALIZATION if VIRTUALIZATION -config KVM - tristate "Kernel-based Virtual Machine (KVM) support" - depends on HAVE_KVM - depends on HIGH_RES_TIMERS - depends on X86_LOCAL_APIC - select PREEMPT_NOTIFIERS - select MMU_NOTIFIER +config KVM_X86 + def_tristate KVM if (KVM_INTEL != n || KVM_AMD != n) + select KVM_COMMON + select KVM_GENERIC_MMU_NOTIFIER + select KVM_ELIDE_TLB_FLUSH_IF_YOUNG select HAVE_KVM_IRQCHIP select HAVE_KVM_PFNCACHE - select HAVE_KVM_IRQFD select HAVE_KVM_DIRTY_RING_TSO select HAVE_KVM_DIRTY_RING_ACQ_REL - select IRQ_BYPASS_MANAGER select HAVE_KVM_IRQ_BYPASS select HAVE_KVM_IRQ_ROUTING - select HAVE_KVM_EVENTFD + select HAVE_KVM_READONLY_MEM + select VHOST_TASK select KVM_ASYNC_PF select USER_RETURN_NOTIFIER select KVM_MMIO @@ -46,9 +42,15 @@ config KVM select KVM_XFER_TO_GUEST_WORK select KVM_GENERIC_DIRTYLOG_READ_PROTECT select KVM_VFIO - select INTERVAL_TREE select HAVE_KVM_PM_NOTIFIER if PM select KVM_GENERIC_HARDWARE_ENABLING + select KVM_GENERIC_PRE_FAULT_MEMORY + select KVM_GENERIC_PRIVATE_MEM if KVM_SW_PROTECTED_VM + select KVM_WERROR if WERROR + +config KVM + tristate "Kernel-based Virtual Machine (KVM) support" + depends on X86_LOCAL_APIC help Support hosting fully virtualized guest machines using hardware virtualization extensions. You will need a fairly recent @@ -65,18 +67,30 @@ config KVM config KVM_WERROR bool "Compile KVM with -Werror" - # KASAN may cause the build to fail due to larger frames - default y if X86_64 && !KASAN - # We use the dependency on !COMPILE_TEST to not be enabled - # blindly in allmodconfig or allyesconfig configurations - depends on KVM - depends on (X86_64 && !KASAN) || !COMPILE_TEST - depends on EXPERT + # Disallow KVM's -Werror if KASAN is enabled, e.g. to guard against + # randomized configs from selecting KVM_WERROR=y, which doesn't play + # nice with KASAN. KASAN builds generates warnings for the default + # FRAME_WARN, i.e. KVM_WERROR=y with KASAN=y requires special tuning. + # Building KVM with -Werror and KASAN is still doable via enabling + # the kernel-wide WERROR=y. + depends on KVM && ((EXPERT && !KASAN) || WERROR) help Add -Werror to the build flags for KVM. If in doubt, say "N". +config KVM_SW_PROTECTED_VM + bool "Enable support for KVM software-protected VMs" + depends on EXPERT + depends on KVM && X86_64 + help + Enable support for KVM software-protected VMs. Currently, software- + protected VMs are purely a development and testing vehicle for + KVM_CREATE_GUEST_MEMFD. Attempting to run a "real" VM workload as a + software-protected VM will fail miserably. + + If unsure, say "N". + config KVM_INTEL tristate "KVM for Intel (and compatible) processors support" depends on KVM && IA32_FEAT_CTL @@ -87,6 +101,21 @@ config KVM_INTEL To compile this as a module, choose M here: the module will be called kvm-intel. +config KVM_INTEL_PROVE_VE + bool "Check that guests do not receive #VE exceptions" + depends on KVM_INTEL && EXPERT + help + Checks that KVM's page table management code will not incorrectly + let guests receive a virtualization exception. Virtualization + exceptions will be trapped by the hypervisor rather than injected + in the guest. + + Note: some CPUs appear to generate spurious EPT Violations #VEs + that trigger KVM's WARN, in particular with eptad=0 and/or nested + virtualization. + + If unsure, say N. + config X86_SGX_KVM bool "Software Guard eXtensions (SGX) Virtualization" depends on X86_SGX && KVM_INTEL @@ -110,13 +139,19 @@ config KVM_AMD will be called kvm-amd. config KVM_AMD_SEV - def_bool y bool "AMD Secure Encrypted Virtualization (SEV) support" + default y depends on KVM_AMD && X86_64 depends on CRYPTO_DEV_SP_PSP && !(KVM_AMD=y && CRYPTO_DEV_CCP_DD=m) + select ARCH_HAS_CC_PLATFORM + select KVM_GENERIC_PRIVATE_MEM + select HAVE_KVM_ARCH_GMEM_PREPARE + select HAVE_KVM_ARCH_GMEM_INVALIDATE help - Provides support for launching Encrypted VMs (SEV) and Encrypted VMs - with Encrypted State (SEV-ES) on AMD processors. + Provides support for launching encrypted VMs which use Secure + Encrypted Virtualization (SEV), Secure Encrypted Virtualization with + Encrypted State (SEV-ES), and Secure Encrypted Virtualization with + Secure Nested Paging (SEV-SNP) technologies on AMD processors. config KVM_SMM bool "System Management Mode emulation" @@ -129,6 +164,20 @@ 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 |