s390: kvm: Cpu model support for msa6, msa7 and msa8

msa6 and msa7 require no changes.
msa8 adds kma instruction and feature area.

Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

diff --git a/Documentation/virtual/kvm/devices/vm.txt b/Documentation/virtual/kvm/devices/vm.txt
index b6cda49..575ccb0 100644 (file)
--- a/Documentation/virtual/kvm/devices/vm.txt
+++ b/Documentation/virtual/kvm/devices/vm.txt
@@ -140,7 +140,8 @@ struct kvm_s390_vm_cpu_subfunc {
        u8 kmo[16];           # valid with Message-Security-Assist-Extension 4
        u8 pcc[16];           # valid with Message-Security-Assist-Extension 4
        u8 ppno[16];          # valid with Message-Security-Assist-Extension 5
-       u8 reserved[1824];    # reserved for future instructions
+       u8 kma[16];           # valid with Message-Security-Assist-Extension 8
+       u8 reserved[1808];    # reserved for future instructions
 };
 
 Parameters: address of a buffer to load the subfunction blocks from.

diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
index bf92679..3dd2a1d 100644 (file)
--- a/arch/s390/include/uapi/asm/kvm.h
+++ b/arch/s390/include/uapi/asm/kvm.h
@@ -141,7 +141,8 @@ struct kvm_s390_vm_cpu_subfunc {
        __u8 kmo[16];           /* with MSA4 */
        __u8 pcc[16];           /* with MSA4 */
        __u8 ppno[16];          /* with MSA5 */
-       __u8 reserved[1824];
+       __u8 kma[16];           /* with MSA8 */
+       __u8 reserved[1808];
 };
 
 /* kvm attributes for crypto */

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 8771fef..7eb1275 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -276,6 +276,10 @@ static void kvm_s390_cpu_feat_init(void)
                __cpacf_query(CPACF_PPNO, (cpacf_mask_t *)
                              kvm_s390_available_subfunc.ppno);
 
+       if (test_facility(146)) /* MSA8 */
+               __cpacf_query(CPACF_KMA, (cpacf_mask_t *)
+                             kvm_s390_available_subfunc.kma);
+
        if (MACHINE_HAS_ESOP)
                allow_cpu_feat(KVM_S390_VM_CPU_FEAT_ESOP);
        /*

diff --git a/arch/s390/tools/gen_facilities.c b/arch/s390/tools/gen_facilities.c
index 0cf802d..be63fbd 100644 (file)
--- a/arch/s390/tools/gen_facilities.c
+++ b/arch/s390/tools/gen_facilities.c
@@ -82,6 +82,7 @@ static struct facility_def facility_defs[] = {
                        78, /* enhanced-DAT 2 */
                        130, /* instruction-execution-protection */
                        131, /* enhanced-SOP 2 and side-effect */
+                       146, /* msa extension 8 */
                        -1  /* END */
                }
        },

diff --git a/tools/arch/s390/include/uapi/asm/kvm.h b/tools/arch/s390/include/uapi/asm/kvm.h
index a2ffec4..7f4fd65 100644 (file)
--- a/tools/arch/s390/include/uapi/asm/kvm.h
+++ b/tools/arch/s390/include/uapi/asm/kvm.h
@@ -131,7 +131,8 @@ struct kvm_s390_vm_cpu_subfunc {
        __u8 kmo[16];           /* with MSA4 */
        __u8 pcc[16];           /* with MSA4 */
        __u8 ppno[16];          /* with MSA5 */
-       __u8 reserved[1824];
+       __u8 kma[16];           /* with MSA8 */
+       __u8 reserved[1808];
 };
 
 /* kvm attributes for crypto */