diff options
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
| -rw-r--r-- | arch/powerpc/kvm/Kconfig | 172 |
1 files changed, 128 insertions, 44 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index eb643f862579..c9a2d50ff1b0 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -1,3 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 # # KVM configuration # @@ -6,7 +7,7 @@ source "virt/kvm/Kconfig" menuconfig VIRTUALIZATION bool "Virtualization" - ---help--- + help Say Y here to get to see options for using your Linux host to run other operating systems inside virtual machines (guests). This option alone does not add any kernel code. @@ -18,9 +19,9 @@ if VIRTUALIZATION config KVM bool - select PREEMPT_NOTIFIERS - select ANON_INODES - select HAVE_KVM_EVENTFD + select KVM_COMMON + select KVM_VFIO + select HAVE_KVM_IRQ_BYPASS config KVM_BOOK3S_HANDLER bool @@ -34,18 +35,23 @@ config KVM_BOOK3S_64_HANDLER bool select KVM_BOOK3S_HANDLER -config KVM_BOOK3S_PR +config KVM_BOOK3S_PR_POSSIBLE bool select KVM_MMIO - select MMU_NOTIFIER + select KVM_GENERIC_MMU_NOTIFIER + +config KVM_BOOK3S_HV_POSSIBLE + bool config KVM_BOOK3S_32 tristate "KVM support for PowerPC book3s_32 processors" depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT + depends on !CONTEXT_TRACKING_USER select KVM select KVM_BOOK3S_32_HANDLER - select KVM_BOOK3S_PR - ---help--- + select KVM_BOOK3S_PR_POSSIBLE + select PPC_FPU + help Support running unmodified book3s_32 guest kernels in virtual machines on book3s_32 host processors. @@ -59,7 +65,10 @@ config KVM_BOOK3S_64 depends on PPC_BOOK3S_64 select KVM_BOOK3S_64_HANDLER select KVM - ---help--- + select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE + select PPC_64S_HASH_MMU + select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV) + help Support running unmodified book3s_64 and book3s_32 guest kernels in virtual machines on book3s_64 host processors. @@ -69,12 +78,15 @@ config KVM_BOOK3S_64 If unsure, say N. config KVM_BOOK3S_64_HV - bool "KVM support for POWER7 and PPC970 using hypervisor mode in host" - depends on KVM_BOOK3S_64 - select MMU_NOTIFIER - ---help--- + tristate "KVM for POWER7 and later using hypervisor mode in host" + depends on KVM_BOOK3S_64 && PPC_POWERNV + select KVM_BOOK3S_HV_POSSIBLE + select KVM_GENERIC_MMU_NOTIFIER + select KVM_BOOK3S_HV_PMU + select CMA + help Support running unmodified book3s_64 guest kernels in - virtual machines on POWER7 and PPC970 processors that have + virtual machines on POWER7 and newer processors that have hypervisor mode available to the host. If you say Y here, KVM will use the hardware virtualization @@ -82,37 +94,102 @@ config KVM_BOOK3S_64_HV guest operating systems will run at full hardware speed using supervisor and user modes. However, this also means that KVM is not usable under PowerVM (pHyp), is only usable - on POWER7 (or later) processors and PPC970-family processors, - and cannot emulate a different processor from the host processor. + on POWER7 or later processors, and cannot emulate a + different processor from the host processor. If unsure, say N. config KVM_BOOK3S_64_PR - def_bool y - depends on KVM_BOOK3S_64 && !KVM_BOOK3S_64_HV - select KVM_BOOK3S_PR - -config KVM_BOOKE_HV + tristate "KVM support without using hypervisor mode in host" + depends on KVM_BOOK3S_64 + depends on !CONTEXT_TRACKING_USER + select KVM_BOOK3S_PR_POSSIBLE + help + Support running guest kernels in virtual machines on processors + without using hypervisor mode in the host, by running the + guest in user mode (problem state) and emulating all + privileged instructions and registers. + + This is only available for hash MMU mode and only supports + guests that use hash MMU mode. + + This is not as fast as using hypervisor mode, but works on + machines where hypervisor mode is not available or not usable, + and can emulate processors that are different from the host + processor, including emulating 32-bit processors on a 64-bit + host. + + Selecting this option will cause the SCV facility to be + disabled when the kernel is booted on the pseries platform in + hash MMU mode (regardless of PR VMs running). When any PR VMs + are running, "AIL" mode is disabled which may slow interrupts + and system calls on the host. + +config KVM_BOOK3S_HV_EXIT_TIMING bool -config KVM_440 - bool "KVM support for PowerPC 440 processors" - depends on 44x - select KVM - select KVM_MMIO - ---help--- - Support running unmodified 440 guest kernels in virtual machines on - 440 host processors. +config KVM_BOOK3S_HV_P9_TIMING + bool "Detailed timing for the P9 entry point" + select KVM_BOOK3S_HV_EXIT_TIMING + depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS + help + Calculate time taken for each vcpu during vcpu entry and + exit, time spent inside the guest and time spent handling + hypercalls and page faults. The total, minimum and maximum + times in nanoseconds together with the number of executions + are reported in debugfs in kvm/vm#/vcpu#/timings. - This module provides access to the hardware capabilities through - a character device node named /dev/kvm. + If unsure, say N. + +config KVM_BOOK3S_HV_P8_TIMING + bool "Detailed timing for hypervisor real-mode code (for POWER8)" + select KVM_BOOK3S_HV_EXIT_TIMING + depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS && !KVM_BOOK3S_HV_P9_TIMING + help + Calculate time taken for each vcpu in the real-mode guest entry, + exit, and interrupt handling code, plus time spent in the guest + and in nap mode due to idle (cede) while other threads are still + in the guest. The total, minimum and maximum times in nanoseconds + together with the number of executions are reported in debugfs in + kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40 + ns per exit on POWER8. If unsure, say N. +config KVM_BOOK3S_HV_NESTED_PMU_WORKAROUND + bool "Nested L0 host workaround for L1 KVM host PMU handling bug" if EXPERT + depends on KVM_BOOK3S_HV_POSSIBLE + default !EXPERT + help + Old nested HV capable Linux guests have a bug where they don't + reflect the PMU in-use status of their L2 guest to the L0 host + while the L2 PMU registers are live. This can result in loss + of L2 PMU register state, causing perf to not work correctly in + L2 guests. + + Selecting this option for the L0 host implements a workaround for + those buggy L1s which saves the L2 state, at the cost of performance + in all nested-capable guest entry/exit. + +config KVM_BOOK3S_HV_PMU + tristate "Hypervisor Perf events for KVM Book3s-HV" + depends on KVM_BOOK3S_64_HV + help + Enable Book3s-HV Hypervisor Perf events PMU named 'kvm-hv'. These + Perf events give an overview of hypervisor performance overall + instead of a specific guests. Currently the PMU reports + L0-Hypervisor stats on a kvm-hv enabled PSeries LPAR like: + * Total/Used Guest-Heap + * Total/Used Guest Page-table Memory + * Total amount of Guest Page-table Memory reclaimed + +config KVM_BOOKE_HV + bool + config KVM_EXIT_TIMING bool "Detailed exit timing" - depends on KVM_440 || KVM_E500V2 || KVM_E500MC - ---help--- + depends on KVM_E500V2 || KVM_E500MC + help Calculate elapsed time for every exit/enter cycle. A per-vcpu report is available in debugfs kvm/vm#_vcpu#_timing. The overhead is relatively small, however it is not recommended for @@ -122,11 +199,12 @@ config KVM_EXIT_TIMING config KVM_E500V2 bool "KVM support for PowerPC E500v2 processors" - depends on E500 && !PPC_E500MC + depends on PPC_E500 && !PPC_E500MC + depends on !CONTEXT_TRACKING_USER select KVM select KVM_MMIO - select MMU_NOTIFIER - ---help--- + select KVM_GENERIC_MMU_NOTIFIER + help Support running unmodified E500 guest kernels in virtual machines on E500v2 host processors. @@ -138,11 +216,12 @@ config KVM_E500V2 config KVM_E500MC bool "KVM support for PowerPC E500MC/E5500/E6500 processors" depends on PPC_E500MC + depends on !CONTEXT_TRACKING_USER select KVM select KVM_MMIO select KVM_BOOKE_HV - select MMU_NOTIFIER - ---help--- + select KVM_GENERIC_MMU_NOTIFIER + help Support running unmodified E500MC/E5500/E6500 guest kernels in virtual machines on E500MC/E5500/E6500 host processors. @@ -153,24 +232,29 @@ config KVM_E500MC config KVM_MPIC bool "KVM in-kernel MPIC emulation" - depends on KVM && E500 + depends on KVM && PPC_E500 select HAVE_KVM_IRQCHIP select HAVE_KVM_IRQ_ROUTING select HAVE_KVM_MSI help Enable support for emulating MPIC devices inside the - host kernel, rather than relying on userspace to emulate. - Currently, support is limited to certain versions of - Freescale's MPIC implementation. + host kernel, rather than relying on userspace to emulate. + Currently, support is limited to certain versions of + Freescale's MPIC implementation. config KVM_XICS bool "KVM in-kernel XICS emulation" depends on KVM_BOOK3S_64 && !KVM_MPIC - ---help--- + select HAVE_KVM_IRQCHIP + default y + help Include support for the XICS (eXternal Interrupt Controller Specification) interrupt controller architecture used on IBM POWER (pSeries) servers. -source drivers/vhost/Kconfig +config KVM_XIVE + bool + default y + depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE endif # VIRTUALIZATION |