b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | # |
| 3 | # KVM configuration |
| 4 | # |
| 5 | |
| 6 | source "virt/kvm/Kconfig" |
| 7 | |
| 8 | menuconfig VIRTUALIZATION |
| 9 | bool "Virtualization" |
| 10 | ---help--- |
| 11 | Say Y here to get to see options for using your Linux host to run |
| 12 | other operating systems inside virtual machines (guests). |
| 13 | This option alone does not add any kernel code. |
| 14 | |
| 15 | If you say N, all options in this submenu will be skipped and |
| 16 | disabled. |
| 17 | |
| 18 | if VIRTUALIZATION |
| 19 | |
| 20 | config KVM |
| 21 | bool |
| 22 | select PREEMPT_NOTIFIERS |
| 23 | select HAVE_KVM_EVENTFD |
| 24 | select HAVE_KVM_VCPU_ASYNC_IOCTL |
| 25 | select SRCU |
| 26 | select KVM_VFIO |
| 27 | select IRQ_BYPASS_MANAGER |
| 28 | select HAVE_KVM_IRQ_BYPASS |
| 29 | |
| 30 | config KVM_BOOK3S_HANDLER |
| 31 | bool |
| 32 | |
| 33 | config KVM_BOOK3S_32_HANDLER |
| 34 | bool |
| 35 | select KVM_BOOK3S_HANDLER |
| 36 | select KVM_MMIO |
| 37 | |
| 38 | config KVM_BOOK3S_64_HANDLER |
| 39 | bool |
| 40 | select KVM_BOOK3S_HANDLER |
| 41 | select PPC_DAWR_FORCE_ENABLE |
| 42 | |
| 43 | config KVM_BOOK3S_PR_POSSIBLE |
| 44 | bool |
| 45 | select KVM_MMIO |
| 46 | select MMU_NOTIFIER |
| 47 | |
| 48 | config KVM_BOOK3S_HV_POSSIBLE |
| 49 | bool |
| 50 | |
| 51 | config KVM_BOOK3S_32 |
| 52 | tristate "KVM support for PowerPC book3s_32 processors" |
| 53 | depends on PPC_BOOK3S_32 && !SMP && !PTE_64BIT |
| 54 | select KVM |
| 55 | select KVM_BOOK3S_32_HANDLER |
| 56 | select KVM_BOOK3S_PR_POSSIBLE |
| 57 | ---help--- |
| 58 | Support running unmodified book3s_32 guest kernels |
| 59 | in virtual machines on book3s_32 host processors. |
| 60 | |
| 61 | This module provides access to the hardware capabilities through |
| 62 | a character device node named /dev/kvm. |
| 63 | |
| 64 | If unsure, say N. |
| 65 | |
| 66 | config KVM_BOOK3S_64 |
| 67 | tristate "KVM support for PowerPC book3s_64 processors" |
| 68 | depends on PPC_BOOK3S_64 |
| 69 | select KVM_BOOK3S_64_HANDLER |
| 70 | select KVM |
| 71 | select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE |
| 72 | select SPAPR_TCE_IOMMU if IOMMU_SUPPORT && (PPC_PSERIES || PPC_POWERNV) |
| 73 | ---help--- |
| 74 | Support running unmodified book3s_64 and book3s_32 guest kernels |
| 75 | in virtual machines on book3s_64 host processors. |
| 76 | |
| 77 | This module provides access to the hardware capabilities through |
| 78 | a character device node named /dev/kvm. |
| 79 | |
| 80 | If unsure, say N. |
| 81 | |
| 82 | config KVM_BOOK3S_64_HV |
| 83 | tristate "KVM for POWER7 and later using hypervisor mode in host" |
| 84 | depends on KVM_BOOK3S_64 && PPC_POWERNV |
| 85 | select KVM_BOOK3S_HV_POSSIBLE |
| 86 | select MMU_NOTIFIER |
| 87 | select CMA |
| 88 | ---help--- |
| 89 | Support running unmodified book3s_64 guest kernels in |
| 90 | virtual machines on POWER7 and newer processors that have |
| 91 | hypervisor mode available to the host. |
| 92 | |
| 93 | If you say Y here, KVM will use the hardware virtualization |
| 94 | facilities of POWER7 (and later) processors, meaning that |
| 95 | guest operating systems will run at full hardware speed |
| 96 | using supervisor and user modes. However, this also means |
| 97 | that KVM is not usable under PowerVM (pHyp), is only usable |
| 98 | on POWER7 or later processors, and cannot emulate a |
| 99 | different processor from the host processor. |
| 100 | |
| 101 | If unsure, say N. |
| 102 | |
| 103 | config KVM_BOOK3S_64_PR |
| 104 | tristate "KVM support without using hypervisor mode in host" |
| 105 | depends on KVM_BOOK3S_64 |
| 106 | select KVM_BOOK3S_PR_POSSIBLE |
| 107 | ---help--- |
| 108 | Support running guest kernels in virtual machines on processors |
| 109 | without using hypervisor mode in the host, by running the |
| 110 | guest in user mode (problem state) and emulating all |
| 111 | privileged instructions and registers. |
| 112 | |
| 113 | This is not as fast as using hypervisor mode, but works on |
| 114 | machines where hypervisor mode is not available or not usable, |
| 115 | and can emulate processors that are different from the host |
| 116 | processor, including emulating 32-bit processors on a 64-bit |
| 117 | host. |
| 118 | |
| 119 | config KVM_BOOK3S_HV_EXIT_TIMING |
| 120 | bool "Detailed timing for hypervisor real-mode code" |
| 121 | depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS |
| 122 | ---help--- |
| 123 | Calculate time taken for each vcpu in the real-mode guest entry, |
| 124 | exit, and interrupt handling code, plus time spent in the guest |
| 125 | and in nap mode due to idle (cede) while other threads are still |
| 126 | in the guest. The total, minimum and maximum times in nanoseconds |
| 127 | together with the number of executions are reported in debugfs in |
| 128 | kvm/vm#/vcpu#/timings. The overhead is of the order of 30 - 40 |
| 129 | ns per exit on POWER8. |
| 130 | |
| 131 | If unsure, say N. |
| 132 | |
| 133 | config KVM_BOOKE_HV |
| 134 | bool |
| 135 | |
| 136 | config KVM_EXIT_TIMING |
| 137 | bool "Detailed exit timing" |
| 138 | depends on KVM_E500V2 || KVM_E500MC |
| 139 | ---help--- |
| 140 | Calculate elapsed time for every exit/enter cycle. A per-vcpu |
| 141 | report is available in debugfs kvm/vm#_vcpu#_timing. |
| 142 | The overhead is relatively small, however it is not recommended for |
| 143 | production environments. |
| 144 | |
| 145 | If unsure, say N. |
| 146 | |
| 147 | config KVM_E500V2 |
| 148 | bool "KVM support for PowerPC E500v2 processors" |
| 149 | depends on E500 && !PPC_E500MC |
| 150 | select KVM |
| 151 | select KVM_MMIO |
| 152 | select MMU_NOTIFIER |
| 153 | ---help--- |
| 154 | Support running unmodified E500 guest kernels in virtual machines on |
| 155 | E500v2 host processors. |
| 156 | |
| 157 | This module provides access to the hardware capabilities through |
| 158 | a character device node named /dev/kvm. |
| 159 | |
| 160 | If unsure, say N. |
| 161 | |
| 162 | config KVM_E500MC |
| 163 | bool "KVM support for PowerPC E500MC/E5500/E6500 processors" |
| 164 | depends on PPC_E500MC |
| 165 | select KVM |
| 166 | select KVM_MMIO |
| 167 | select KVM_BOOKE_HV |
| 168 | select MMU_NOTIFIER |
| 169 | ---help--- |
| 170 | Support running unmodified E500MC/E5500/E6500 guest kernels in |
| 171 | virtual machines on E500MC/E5500/E6500 host processors. |
| 172 | |
| 173 | This module provides access to the hardware capabilities through |
| 174 | a character device node named /dev/kvm. |
| 175 | |
| 176 | If unsure, say N. |
| 177 | |
| 178 | config KVM_MPIC |
| 179 | bool "KVM in-kernel MPIC emulation" |
| 180 | depends on KVM && E500 |
| 181 | select HAVE_KVM_IRQCHIP |
| 182 | select HAVE_KVM_IRQFD |
| 183 | select HAVE_KVM_IRQ_ROUTING |
| 184 | select HAVE_KVM_MSI |
| 185 | help |
| 186 | Enable support for emulating MPIC devices inside the |
| 187 | host kernel, rather than relying on userspace to emulate. |
| 188 | Currently, support is limited to certain versions of |
| 189 | Freescale's MPIC implementation. |
| 190 | |
| 191 | config KVM_XICS |
| 192 | bool "KVM in-kernel XICS emulation" |
| 193 | depends on KVM_BOOK3S_64 && !KVM_MPIC |
| 194 | select HAVE_KVM_IRQCHIP |
| 195 | select HAVE_KVM_IRQFD |
| 196 | default y |
| 197 | ---help--- |
| 198 | Include support for the XICS (eXternal Interrupt Controller |
| 199 | Specification) interrupt controller architecture used on |
| 200 | IBM POWER (pSeries) servers. |
| 201 | |
| 202 | config KVM_XIVE |
| 203 | bool |
| 204 | default y |
| 205 | depends on KVM_XICS && PPC_XIVE_NATIVE && KVM_BOOK3S_HV_POSSIBLE |
| 206 | |
| 207 | source "drivers/vhost/Kconfig" |
| 208 | |
| 209 | endif # VIRTUALIZATION |