[Qemu-devel] [PULL 0/2] s390 patch queue 2012-08-15

[Qemu-devel] [PULL 0/2] s390 patch queue 2012-08-15

[Alexander Graf]

Hi Blue / Aurelien,

This is my current patch queue for s390.  Please pull.

Alex


The following changes since commit 03834e22abafbc8dc4052d46a5ccd6dd135a54a3:
  Anthony Liguori (1):
        Merge remote-tracking branch 'origin/master' into staging

are available in the git repository at:

  git://repo.or.cz/qemu/agraf.git s390-for-upstream

Christian Borntraeger (2):
      s390: Fix error handling and condition code of service call
      s390: provide interface for service interrupt/introduce interrupt.c

 target-s390x/Makefile.objs |    2 +-
 target-s390x/cpu.h         |    3 +++
 target-s390x/interrupt.c   |   29 +++++++++++++++++++++++++++++
 target-s390x/kvm.c         |    5 +++--
 target-s390x/op_helper.c   |   43 +++++++++++++++++++------------------------
 5 files changed, 55 insertions(+), 27 deletions(-)
 create mode 100644 target-s390x/interrupt.c

[Qemu-devel] [PATCH 1/2] s390: Fix error handling and condition code of service call

[Alexander Graf]

From: Christian Borntraeger <borntraeger@de.ibm.com>

Invalid sccb addresses will cause specification or addressing exception.
Lets add those checks. Furthermore, the good case (cc=0) was incorrect
for KVM, we did not set the CC at all. We now use return codes < 0
as program checks and return codes > 0 as condition code values.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 target-s390x/kvm.c       |    5 +++--
 target-s390x/op_helper.c |   27 ++++++++++++++++++---------
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 47008c2..07edf93 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -273,9 +273,10 @@ static int kvm_sclp_service_call(CPUS390XState *env, struct kvm_run *run,
     code = env->regs[(ipbh0 & 0xf0) >> 4];
 
     r = sclp_service_call(env, sccb, code);
-    if (r) {
-        setcc(env, 3);
+    if (r < 0) {
+        enter_pgmcheck(env, -r);
     }
+    setcc(env, r);
 
     return 0;
 }
diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
index 7b72473..91dd8dc 100644
--- a/target-s390x/op_helper.c
+++ b/target-s390x/op_helper.c
@@ -19,6 +19,8 @@
  */
 
 #include "cpu.h"
+#include "memory.h"
+#include "cputlb.h"
 #include "dyngen-exec.h"
 #include "host-utils.h"
 #include "helper.h"
@@ -2366,6 +2368,9 @@ static void ext_interrupt(CPUS390XState *env, int type, uint32_t param,
     cpu_inject_ext(env, type, param, param64);
 }
 
+/*
+ * 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;
@@ -2375,10 +2380,12 @@ int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code)
     printf("sclp(0x%x, 0x%" PRIx64 ")\n", sccb, code);
 #endif
 
+    /* basic checks */
+    if (!memory_region_is_ram(phys_page_find(sccb >> TARGET_PAGE_BITS)->mr)) {
+        return -PGM_ADDRESSING;
+    }
     if (sccb & ~0x7ffffff8ul) {
-        fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb);
-        r = -1;
-        goto out;
+        return -PGM_SPECIFICATION;
     }
 
     switch(code) {
@@ -2405,22 +2412,24 @@ int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code)
 #ifdef DEBUG_HELPER
             printf("KVM: invalid sclp call 0x%x / 0x%" PRIx64 "x\n", sccb, code);
 #endif
-            r = -1;
+            r = 3;
             break;
     }
 
-out:
     return r;
 }
 
 /* SCLP service call */
 uint32_t HELPER(servc)(uint32_t r1, uint64_t r2)
 {
-    if (sclp_service_call(env, r1, r2)) {
-        return 3;
-    }
+    int r;
 
-    return 0;
+    r = sclp_service_call(env, r1, r2);
+    if (r < 0) {
+        program_interrupt(env, -r, 4);
+        return 0;
+    }
+    return r;
 }
 
 /* DIAG */
-- 
1.6.0.2

[Qemu-devel] [PATCH 2/2] s390: provide interface for service interrupt/introduce interrupt.c

[Alexander Graf]

From: Christian Borntraeger <borntraeger@de.ibm.com>

This patch creates interrupt.c. The first user is a callback for hw/*
code to trigger an service interrupt for a given sccb value. Several
interrupt types for s390 are floating (can be delivered to all CPUs).
so this code does not belong to a specific CPU.
Other interrupts (like the virtio one) are also floating and can be
moved here later on.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 target-s390x/Makefile.objs |    2 +-
 target-s390x/cpu.h         |    3 +++
 target-s390x/interrupt.c   |   29 +++++++++++++++++++++++++++++
 target-s390x/op_helper.c   |   16 +---------------
 4 files changed, 34 insertions(+), 16 deletions(-)
 create mode 100644 target-s390x/interrupt.c

diff --git a/target-s390x/Makefile.objs b/target-s390x/Makefile.objs
index 262747f..80be3bb 100644
--- a/target-s390x/Makefile.objs
+++ b/target-s390x/Makefile.objs
@@ -1,4 +1,4 @@
-obj-y += translate.o op_helper.o helper.o cpu.o
+obj-y += translate.o op_helper.o helper.o cpu.o interrupt.o
 obj-$(CONFIG_SOFTMMU) += machine.o
 obj-$(CONFIG_KVM) += kvm.o
 
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index c30ac3a..18ac6e3 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -320,6 +320,9 @@ S390CPU *s390_cpu_addr2state(uint16_t cpu_addr);
 void s390_add_running_cpu(CPUS390XState *env);
 unsigned s390_del_running_cpu(CPUS390XState *env);
 
+/* service interrupts are floating therefore we must not pass an cpustate */
+void s390_sclp_extint(uint32_t parm);
+
 /* from s390-virtio-bus */
 extern const target_phys_addr_t virtio_size;
 
diff --git a/target-s390x/interrupt.c b/target-s390x/interrupt.c
new file mode 100644
index 0000000..c1b034f
--- /dev/null
+++ b/target-s390x/interrupt.c
@@ -0,0 +1,29 @@
+/*
+ * QEMU S/390 Interrupt support
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at your
+ * option) any later version.  See the COPYING file in the top-level directory.
+ */
+
+#include "cpu.h"
+#include "kvm.h"
+
+#if !defined(CONFIG_USER_ONLY)
+/* service interrupts are floating therefore we must not pass an cpustate */
+void s390_sclp_extint(uint32_t parm)
+{
+    S390CPU *dummy_cpu = s390_cpu_addr2state(0);
+    CPUS390XState *env = &dummy_cpu->env;
+
+    if (kvm_enabled()) {
+#ifdef CONFIG_KVM
+        kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE, parm, 0, 1);
+#endif
+    } else {
+        env->psw.addr += 4;
+        cpu_inject_ext(env, EXT_SERVICE, parm, 0);
+    }
+}
+#endif
diff --git a/target-s390x/op_helper.c b/target-s390x/op_helper.c
index 91dd8dc..abc35dd 100644
--- a/target-s390x/op_helper.c
+++ b/target-s390x/op_helper.c
@@ -2362,12 +2362,6 @@ static void program_interrupt(CPUS390XState *env, uint32_t code, int ilc)
     }
 }
 
-static void ext_interrupt(CPUS390XState *env, int type, uint32_t param,
-                          uint64_t param64)
-{
-    cpu_inject_ext(env, type, param, param64);
-}
-
 /*
  * ret < 0 indicates program check, ret = 0,1,2,3 -> cc
  */
@@ -2398,15 +2392,7 @@ int sclp_service_call(CPUS390XState *env, uint32_t sccb, uint64_t code)
             stb_phys(sccb + SCP_INCREMENT, 1 << shift);
             stw_phys(sccb + SCP_RESPONSE_CODE, 0x10);
 
-            if (kvm_enabled()) {
-#ifdef CONFIG_KVM
-                kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE,
-                                            sccb & ~3, 0, 1);
-#endif
-            } else {
-                env->psw.addr += 4;
-                ext_interrupt(env, EXT_SERVICE, sccb & ~3, 0);
-            }
+            s390_sclp_extint(sccb & ~3);
             break;
         default:
 #ifdef DEBUG_HELPER
-- 
1.6.0.2

Re: [Qemu-devel] [PULL 0/2] s390 patch queue 2012-08-15

[Anthony Liguori]

Alexander Graf <agraf@suse.de> writes:

> Hi Blue / Aurelien,
>
> This is my current patch queue for s390.  Please pull.
>

Pulled. Thanks.

Regards,

Anthony Liguori

> Alex
>
>
> The following changes since commit 03834e22abafbc8dc4052d46a5ccd6dd135a54a3:
>   Anthony Liguori (1):
>         Merge remote-tracking branch 'origin/master' into staging
>
> are available in the git repository at:
>
>   git://repo.or.cz/qemu/agraf.git s390-for-upstream
>
> Christian Borntraeger (2):
>       s390: Fix error handling and condition code of service call
>       s390: provide interface for service interrupt/introduce interrupt.c
>
>  target-s390x/Makefile.objs |    2 +-
>  target-s390x/cpu.h         |    3 +++
>  target-s390x/interrupt.c   |   29 +++++++++++++++++++++++++++++
>  target-s390x/kvm.c         |    5 +++--
>  target-s390x/op_helper.c   |   43 +++++++++++++++++++------------------------
>  5 files changed, 55 insertions(+), 27 deletions(-)
>  create mode 100644 target-s390x/interrupt.c