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authorFarhan Ali <alifm@linux.vnet.ibm.com>2017-02-24 16:12:56 -0500
committerChristian Borntraeger <borntraeger@de.ibm.com>2017-04-21 11:08:11 +0200
commit730cd632c4e485b90f97fe998e300045da094938 (patch)
tree894c8643cbfbaa47b6973cd34a3e054840513e47 /arch/s390/include
parent71cb1bf66ef0d1d36ff3f04150450df9dd8af654 (diff)
downloadop-kernel-dev-730cd632c4e485b90f97fe998e300045da094938.zip
op-kernel-dev-730cd632c4e485b90f97fe998e300045da094938.tar.gz
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.h2
-rw-r--r--arch/s390/include/uapi/asm/kvm.h1
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 552c319..426614a 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 2c9ad25..bf92679 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];
};
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