s390: sclp base support

This adds a more generic infrastructure for handling Service-Call
requests on s390. Currently we only support a small subset of Read
SCP Info directly in target-s390x. This patch provides the base
infrastructure for supporting more commands and moves Read SCP
Info.
In the future we could add additional commands for hotplug, call
home and event handling.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

3 files changed, 3 insertions, 60 deletions

diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 9997765dd1..5be6e83528 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -596,17 +596,6 @@ static inline const char *cc_name(int cc_op)
     return cc_names[cc_op];
 }
 
-/* SCLP PV interface defines */
-#define SCLP_CMDW_READ_SCP_INFO         0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
-
-#define SCP_LENGTH                      0x00
-#define SCP_FUNCTION_CODE               0x02
-#define SCP_CONTROL_MASK                0x03
-#define SCP_RESPONSE_CODE               0x06
-#define SCP_MEM_CODE                    0x08
-#define SCP_INCREMENT                   0x0a
-
 typedef struct LowCore
 {
     /* prefix area: defined by architecture */
@@ -955,7 +944,7 @@ static inline void ebcdic_put(uint8_t *p, const char *ascii, int len)
 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr);
 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
                   target_ulong *raddr, int *flags);
-int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code);
+int sclp_service_call(uint32_t sccb, uint64_t code);
 uint32_t calc_cc(CPUS390XState *env, uint32_t cc_op, uint64_t src, uint64_t dst,
                  uint64_t vr);
 
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index e19a44d637..a66ac4341c 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -60,9 +60,6 @@
 #define SIGP_STORE_STATUS_ADDR          0x0e
 #define SIGP_SET_ARCH                   0x12
 
-#define SCLP_CMDW_READ_SCP_INFO         0x00020001
-#define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
-
 const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
     KVM_CAP_LAST_INFO
 };
@@ -344,7 +341,7 @@ static int kvm_sclp_service_call(CPUS390XState *env, struct kvm_run *run,
     sccb = env->regs[ipbh0 & 0xf];
     code = env->regs[(ipbh0 & 0xf0) >> 4];
 
-    r = sclp_service_call(env, sccb, code);
+    r = sclp_service_call(sccb, code);
     if (r < 0) {
         enter_pgmcheck(env, -r);
     }
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index fdccd58e3d..38d8f2a627 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -67,55 +67,12 @@ void program_interrupt(CPUS390XState *env, uint32_t code, int ilc)
     }
 }
 
-/*
- * ret < 0 indicates program check, ret = 0, 1, 2, 3 -> cc
- */
-int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code)
-{
-    int r = 0;
-    int shift = 0;
-
-#ifdef DEBUG_HELPER
-    printf("sclp(0x%x, 0x%" PRIx64 ")\n", sccb, code);
-#endif
-
-    /* basic checks */
-    if (cpu_physical_memory_is_io(sccb)) {
-        return -PGM_ADDRESSING;
-    }
-    if (sccb & ~0x7ffffff8ul) {
-        return -PGM_SPECIFICATION;
-    }
-
-    switch (code) {
-    case SCLP_CMDW_READ_SCP_INFO:
-    case SCLP_CMDW_READ_SCP_INFO_FORCED:
-        while ((ram_size >> (20 + shift)) > 65535) {
-            shift++;
-        }
-        stw_phys(sccb + SCP_MEM_CODE, ram_size >> (20 + shift));
-        stb_phys(sccb + SCP_INCREMENT, 1 << shift);
-        stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
-
-        s390_sclp_extint(sccb & ~3);
-        break;
-    default:
-#ifdef DEBUG_HELPER
-        printf("KVM: invalid sclp call 0x%x / 0x%" PRIx64 "x\n", sccb, code);
-#endif
-        r = 3;
-        break;
-    }
-
-    return r;
-}
-
 /* SCLP service call */
 uint32_t HELPER(servc)(CPUS390XState *env, uint32_t r1, uint64_t r2)
 {
     int r;
 
-    r = sclp_service_call(env, r1, r2);
+    r = sclp_service_call(r1, r2);
     if (r < 0) {
         program_interrupt(env, -r, 4);
         return 0;