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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2013-10-07 22:17:52 +0530 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2013-10-17 15:18:28 +0200 |
| commit | 9975f5e3692d320b4259a4d2edd8a979adb1e535 (patch) | |
| tree | 1d76ca99ca876230944faae97a8a4ba2ed1e9c9f /arch/powerpc/kvm/Kconfig | |
| parent | 7aa79938f7d76f5865d0b2a2d9bbe2337560261f (diff) | |
| download | linux-9975f5e3692d320b4259a4d2edd8a979adb1e535.tar.gz linux-9975f5e3692d320b4259a4d2edd8a979adb1e535.tar.bz2 linux-9975f5e3692d320b4259a4d2edd8a979adb1e535.zip | |
kvm: powerpc: book3s: Add a new config variable CONFIG_KVM_BOOK3S_HV_POSSIBLE
This help ups to select the relevant code in the kernel code
when we later move HV and PR bits as seperate modules. The patch
also makes the config options for PR KVM selectable
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/Kconfig')
| -rw-r--r-- | arch/powerpc/kvm/Kconfig | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig index d0665f231e6f..a96d7c32f785 100644 --- a/arch/powerpc/kvm/Kconfig +++ b/arch/powerpc/kvm/Kconfig @@ -39,6 +39,9 @@ config KVM_BOOK3S_PR_POSSIBLE select KVM_MMIO select 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 @@ -59,6 +62,7 @@ config KVM_BOOK3S_64 depends on PPC_BOOK3S_64 select KVM_BOOK3S_64_HANDLER select KVM + select KVM_BOOK3S_PR_POSSIBLE if !KVM_BOOK3S_HV_POSSIBLE ---help--- Support running unmodified book3s_64 and book3s_32 guest kernels in virtual machines on book3s_64 host processors. @@ -71,6 +75,7 @@ config KVM_BOOK3S_64 config KVM_BOOK3S_64_HV bool "KVM support for POWER7 and PPC970 using hypervisor mode in host" depends on KVM_BOOK3S_64 + select KVM_BOOK3S_HV_POSSIBLE select MMU_NOTIFIER select CMA ---help--- @@ -89,9 +94,20 @@ config KVM_BOOK3S_64_HV If unsure, say N. config KVM_BOOK3S_64_PR - def_bool y + bool "KVM support without using hypervisor mode in host" depends on KVM_BOOK3S_64 && !KVM_BOOK3S_64_HV 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 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. config KVM_BOOKE_HV bool |