KVM: s390: intercepts for privileged instructions

This patch introduces in-kernel handling of some intercepts for privileged
instructions:

handle_set_prefix()        sets the prefix register of the local cpu
handle_store_prefix()      stores the content of the prefix register to memory
handle_store_cpu_address() stores the cpu number of the current cpu to memory
handle_skey()              just decrements the instruction address and retries
handle_stsch()             delivers condition code 3 "operation not supported"
handle_chsc()              same here
handle_stfl()              stores the facility list which contains the
                           capabilities of the cpu
handle_stidp()             stores cpu type/model/revision and such
handle_stsi()              stores information about the system topology

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 5e3473c9a639..5a17176fb641 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -48,6 +48,15 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
         { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
         { "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
         { "exit_wait_state", VCPU_STAT(exit_wait_state) },
+        { "instruction_stidp", VCPU_STAT(instruction_stidp) },
+        { "instruction_spx", VCPU_STAT(instruction_spx) },
+        { "instruction_stpx", VCPU_STAT(instruction_stpx) },
+        { "instruction_stap", VCPU_STAT(instruction_stap) },
+        { "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
+        { "instruction_stsch", VCPU_STAT(instruction_stsch) },
+        { "instruction_chsc", VCPU_STAT(instruction_chsc) },
+        { "instruction_stsi", VCPU_STAT(instruction_stsi) },
+        { "instruction_stfl", VCPU_STAT(instruction_stfl) },
         { NULL }
 };
 
@@ -246,6 +255,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
         vcpu->arch.sie_block->eca   = 0xC1002001U;
         setup_timer(&vcpu->arch.ckc_timer, kvm_s390_idle_wakeup,
                  (unsigned long) vcpu);
+        get_cpu_id(&vcpu->arch.cpu_id);
+        vcpu->arch.cpu_id.version = 0xfe;
         return 0;
 }