diff options
| author | Farhan Ali <alifm@linux.vnet.ibm.com> | 2017-02-25 00:12:56 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-04-21 12:08:11 +0300 |
| commit | 730cd632c4e485b90f97fe998e300045da094938 (patch) | |
| tree | 894c8643cbfbaa47b6973cd34a3e054840513e47 /arch/s390/include | |
| parent | 71cb1bf66ef0d1d36ff3f04150450df9dd8af654 (diff) | |
| download | linux-730cd632c4e485b90f97fe998e300045da094938.tar.xz | |
KVM: s390: Support keyless subset guest mode
If the KSS facility is available on the machine, we also make it
available for our KVM guests.
The KSS facility bypasses storage key management as long as the guest
does not issue a related instruction. When that happens, the control is
returned to the host, which has to turn off KSS for a guest vcpu
before retrying the instruction.
Signed-off-by: Corey S. McQuay <csmcquay@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/s390/include/uapi/asm/kvm.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index 552c319483c6..426614a882a9 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -122,6 +122,7 @@ struct esca_block { #define CPUSTAT_SLSR 0x00002000 #define CPUSTAT_ZARCH 0x00000800 #define CPUSTAT_MCDS 0x00000100 +#define CPUSTAT_KSS 0x00000200 #define CPUSTAT_SM 0x00000080 #define CPUSTAT_IBS 0x00000040 #define CPUSTAT_GED2 0x00000010 @@ -185,6 +186,7 @@ struct kvm_s390_sie_block { #define ICPT_OPEREXC 0x2C #define ICPT_PARTEXEC 0x38 #define ICPT_IOINST 0x40 +#define ICPT_KSS 0x5c __u8 icptcode; /* 0x0050 */ __u8 icptstatus; /* 0x0051 */ __u16 ihcpu; /* 0x0052 */ diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 2c9ad251fa33..bf9267930939 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -119,6 +119,7 @@ struct kvm_s390_vm_cpu_machine { #define KVM_S390_VM_CPU_FEAT_CMMA 10 #define KVM_S390_VM_CPU_FEAT_PFMFI 11 #define KVM_S390_VM_CPU_FEAT_SIGPIF 12 +#define KVM_S390_VM_CPU_FEAT_KSS 13 struct kvm_s390_vm_cpu_feat { __u64 feat[16]; }; |