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| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-04-01 19:11:03 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-10 17:47:21 +0200 |
| commit | 5abb9351dfd937d43193f4d09af9c72bfe2c4180 (patch) | |
| tree | 5ed221cbfec7483c3438f3ddd6a76829a5812c58 /arch/s390/Kconfig | |
| parent | fd184e1a8b650159ca553c53dd0fee75df799b4a (diff) | |
| download | lwn-5abb9351dfd937d43193f4d09af9c72bfe2c4180.tar.gz lwn-5abb9351dfd937d43193f4d09af9c72bfe2c4180.zip | |
s390/uv: introduce guest side ultravisor code
The Ultravisor Call Facility (stfle bit 158) defines an API to the
Ultravisor (UV calls), a mini hypervisor located at machine
level. With help of the Ultravisor, KVM will be able to run
"protected" VMs, special VMs whose memory and management data are
unavailable to KVM.
The protected VMs can also request services from the Ultravisor.
The guest api consists of UV calls to share and unshare memory with the
kvm hypervisor.
To enable this feature support PROTECTED_VIRTUALIZATION_GUEST kconfig
option has been introduced.
Co-developed-by: Janosch Frank <frankja@de.ibm.com>
Signed-off-by: Janosch Frank <frankja@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index b6e3d0653002..4ac8d49e206a 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -837,6 +837,17 @@ config HAVE_PNETID menu "Virtualization" +config PROTECTED_VIRTUALIZATION_GUEST + def_bool n + prompt "Protected virtualization guest support" + help + Select this option, if you want to be able to run this + kernel as a protected virtualization KVM guest. + Protected virtualization capable machines have a mini hypervisor + located at machine level (an ultravisor). With help of the + Ultravisor, KVM will be able to run "protected" VMs, special + VMs whose memory and management data are unavailable to KVM. + config PFAULT def_bool y prompt "Pseudo page fault support" |