[Qemu-devel] [PATCH 03/10] s390x: Store Additional Status SIGP order

[Cornelia Huck <cornelia.huck@de.ibm.com>]

From: Eric Farman <farman@linux.vnet.ibm.com>

Add handling for the Store Additional Status at Address order
that exists for the Signal Processor (SIGP) instruction.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
---
 target-s390x/cpu.h |  1 +
 target-s390x/kvm.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 56 insertions(+)

diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 708349c..031f94d 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -945,6 +945,7 @@ struct sysib_322 {
 #define SIGP_SET_PREFIX        0x0d
 #define SIGP_STORE_STATUS_ADDR 0x0e
 #define SIGP_SET_ARCH          0x12
+#define SIGP_STORE_ADTL_STATUS 0x17
 
 /* SIGP condition codes */
 #define SIGP_CC_ORDER_CODE_ACCEPTED 0
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index ca8ffcc..61e1321 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -1373,6 +1373,28 @@ static void sigp_stop(void *arg)
     si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
 }
 
+#define ADTL_SAVE_AREA_SIZE 1024
+static int kvm_s390_store_adtl_status(S390CPU *cpu, hwaddr addr)
+{
+    void *mem;
+    hwaddr len = ADTL_SAVE_AREA_SIZE;
+
+    mem = cpu_physical_memory_map(addr, &len, 1);
+    if (!mem) {
+        return -EFAULT;
+    }
+    if (len != ADTL_SAVE_AREA_SIZE) {
+        cpu_physical_memory_unmap(mem, len, 1, 0);
+        return -EFAULT;
+    }
+
+    memcpy(mem, &cpu->env.vregs, 512);
+
+    cpu_physical_memory_unmap(mem, len, 1, len);
+
+    return 0;
+}
+
 #define KVM_S390_STORE_STATUS_DEF_ADDR offsetof(LowCore, floating_pt_save_area)
 #define SAVE_AREA_SIZE 512
 static int kvm_s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
@@ -1461,6 +1483,36 @@ static void sigp_store_status_at_address(void *arg)
     si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
 }
 
+static void sigp_store_adtl_status(void *arg)
+{
+    SigpInfo *si = arg;
+
+    if (!kvm_check_extension(kvm_state, KVM_CAP_S390_VECTOR_REGISTERS)) {
+        set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
+        return;
+    }
+
+    /* cpu has to be stopped */
+    if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+        set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);
+        return;
+    }
+
+    /* parameter must be aligned to 1024-byte boundary */
+    if (si->param & 0x3ff) {
+        set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+        return;
+    }
+
+    cpu_synchronize_state(CPU(si->cpu));
+
+    if (kvm_s390_store_adtl_status(si->cpu, si->param)) {
+        set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+        return;
+    }
+    si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
 static void sigp_restart(void *arg)
 {
     SigpInfo *si = arg;
@@ -1578,6 +1630,9 @@ static int handle_sigp_single_dst(S390CPU *dst_cpu, uint8_t order,
     case SIGP_STORE_STATUS_ADDR:
         run_on_cpu(CPU(dst_cpu), sigp_store_status_at_address, &si);
         break;
+    case SIGP_STORE_ADTL_STATUS:
+        run_on_cpu(CPU(dst_cpu), sigp_store_adtl_status, &si);
+        break;
     case SIGP_SET_PREFIX:
         run_on_cpu(CPU(dst_cpu), sigp_set_prefix, &si);
         break;
-- 
2.4.1