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, 13 insertions, 0 deletions

diff --git a/include/asm-s390/kvm_host.h b/include/asm-s390/kvm_host.h
index 4fe19305888a..2eaf6fede025 100644
--- a/include/asm-s390/kvm_host.h
+++ b/include/asm-s390/kvm_host.h
@@ -119,6 +119,15 @@ struct kvm_vcpu_stat {
         u32 deliver_restart_signal;
         u32 deliver_program_int;
         u32 exit_wait_state;
+        u32 instruction_stidp;
+        u32 instruction_spx;
+        u32 instruction_stpx;
+        u32 instruction_stap;
+        u32 instruction_storage_key;
+        u32 instruction_stsch;
+        u32 instruction_chsc;
+        u32 instruction_stsi;
+        u32 instruction_stfl;
 };
 
 struct io_info {
@@ -188,6 +197,10 @@ struct kvm_vcpu_arch {
         unsigned int      guest_acrs[NUM_ACRS];
         struct local_interrupt local_int;
         struct timer_list ckc_timer;
+        union  {
+                cpuid_t   cpu_id;
+                u64       stidp_data;
+        };
 };
 
 struct kvm_vm_stat {