[PATCH] s390x/gdb: Split s390-virt.xml

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[PATCH] s390x/gdb: Split s390-virt.xml

From:	Ilya Leoshkevich
Subject:	[PATCH] s390x/gdb: Split s390-virt.xml
Date:	Mon, 13 Mar 2023 22:16:14 +0100

TCG emulates ckc, cputm, last_break and prefix, and it's quite useful
to have them during debugging.

So move them into the new s390-virt-tcg.xml file.

pp, pfault_token, pfault_select and pfault_compare are not emulated,
so keep them in s390-virt.xml.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 configs/targets/s390x-linux-user.mak |  2 +-
 configs/targets/s390x-softmmu.mak    |  2 +-
 gdb-xml/s390-virt-tcg.xml            | 14 +++++
 gdb-xml/s390-virt.xml                |  4 --
 target/s390x/gdbstub.c               | 82 ++++++++++++++++++----------
 5 files changed, 69 insertions(+), 35 deletions(-)
 create mode 100644 gdb-xml/s390-virt-tcg.xml

diff --git a/configs/targets/s390x-linux-user.mak 
b/configs/targets/s390x-linux-user.mak
index e2978248ede..fb3e2b73be7 100644
--- a/configs/targets/s390x-linux-user.mak
+++ b/configs/targets/s390x-linux-user.mak
@@ -2,4 +2,4 @@ TARGET_ARCH=s390x
 TARGET_SYSTBL_ABI=common,64
 TARGET_SYSTBL=syscall.tbl
 TARGET_BIG_ENDIAN=y
-TARGET_XML_FILES= gdb-xml/s390x-core64.xml gdb-xml/s390-acr.xml 
gdb-xml/s390-fpr.xml gdb-xml/s390-vx.xml gdb-xml/s390-cr.xml 
gdb-xml/s390-virt.xml gdb-xml/s390-gs.xml
+TARGET_XML_FILES= gdb-xml/s390x-core64.xml gdb-xml/s390-acr.xml 
gdb-xml/s390-fpr.xml gdb-xml/s390-vx.xml gdb-xml/s390-cr.xml 
gdb-xml/s390-virt.xml gdb-xml/s390-virt-tcg.xml gdb-xml/s390-gs.xml
diff --git a/configs/targets/s390x-softmmu.mak 
b/configs/targets/s390x-softmmu.mak
index 258b4cf3582..554330d7c85 100644
--- a/configs/targets/s390x-softmmu.mak
+++ b/configs/targets/s390x-softmmu.mak
@@ -1,4 +1,4 @@
 TARGET_ARCH=s390x
 TARGET_BIG_ENDIAN=y
 TARGET_SUPPORTS_MTTCG=y
-TARGET_XML_FILES= gdb-xml/s390x-core64.xml gdb-xml/s390-acr.xml 
gdb-xml/s390-fpr.xml gdb-xml/s390-vx.xml gdb-xml/s390-cr.xml 
gdb-xml/s390-virt.xml gdb-xml/s390-gs.xml
+TARGET_XML_FILES= gdb-xml/s390x-core64.xml gdb-xml/s390-acr.xml 
gdb-xml/s390-fpr.xml gdb-xml/s390-vx.xml gdb-xml/s390-cr.xml 
gdb-xml/s390-virt.xml gdb-xml/s390-virt-tcg.xml gdb-xml/s390-gs.xml
diff --git a/gdb-xml/s390-virt-tcg.xml b/gdb-xml/s390-virt-tcg.xml
new file mode 100644
index 00000000000..0f77c9b48c6
--- /dev/null
+++ b/gdb-xml/s390-virt-tcg.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0"?>
+<!-- Copyright 2023 IBM Corp.
+
+     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. -->
+
+<!DOCTYPE feature SYSTEM "gdb-target.dtd">
+<feature name="org.gnu.gdb.s390.virt.tcg">
+  <reg name="ckc" bitsize="64" type="uint64" group="system"/>
+  <reg name="cputm" bitsize="64" type="uint64" group="system"/>
+  <reg name="last_break" bitsize="64" type="code_ptr" group="system"/>
+  <reg name="prefix" bitsize="64" type="data_ptr" group="system"/>
+</feature>
diff --git a/gdb-xml/s390-virt.xml b/gdb-xml/s390-virt.xml
index e2e9a7ad3cc..a79c0307682 100644
--- a/gdb-xml/s390-virt.xml
+++ b/gdb-xml/s390-virt.xml
@@ -7,10 +7,6 @@
 
 <!DOCTYPE feature SYSTEM "gdb-target.dtd">
 <feature name="org.gnu.gdb.s390.virt">
-  <reg name="ckc" bitsize="64" type="uint64" group="system"/>
-  <reg name="cputm" bitsize="64" type="uint64" group="system"/>
-  <reg name="last_break" bitsize="64" type="code_ptr" group="system"/>
-  <reg name="prefix" bitsize="64" type="data_ptr" group="system"/>
   <reg name="pp" bitsize="64" type="uint64" group="system"/>
   <reg name="pfault_token" bitsize="64" type="uint64" group="system"/>
   <reg name="pfault_select" bitsize="64" type="uint64" group="system"/>
diff --git a/target/s390x/gdbstub.c b/target/s390x/gdbstub.c
index a5d69d0e0bc..111b695dc85 100644
--- a/target/s390x/gdbstub.c
+++ b/target/s390x/gdbstub.c
@@ -200,61 +200,81 @@ static int cpu_write_c_reg(CPUS390XState *env, uint8_t 
*mem_buf, int n)
     }
 }
 
-/* the values represent the positions in s390-virt.xml */
-#define S390_VIRT_CKC_REGNUM    0
-#define S390_VIRT_CPUTM_REGNUM  1
-#define S390_VIRT_BEA_REGNUM    2
-#define S390_VIRT_PREFIX_REGNUM 3
-#define S390_VIRT_PP_REGNUM     4
-#define S390_VIRT_PFT_REGNUM    5
-#define S390_VIRT_PFS_REGNUM    6
-#define S390_VIRT_PFC_REGNUM    7
-/* total number of registers in s390-virt.xml */
-#define S390_NUM_VIRT_REGS 8
+/* the values represent the positions in s390-virt-tcg.xml */
+#define S390_VIRT_TCG_CKC_REGNUM    0
+#define S390_VIRT_TCG_CPUTM_REGNUM  1
+#define S390_VIRT_TCG_BEA_REGNUM    2
+#define S390_VIRT_TCG_PREFIX_REGNUM 3
+/* total number of registers in s390-virt-tcg.xml */
+#define S390_NUM_VIRT_TCG_REGS 4
 
-static int cpu_read_virt_reg(CPUS390XState *env, GByteArray *mem_buf, int n)
+static int cpu_read_virt_tcg_reg(CPUS390XState *env, GByteArray *mem_buf, int 
n)
 {
     switch (n) {
-    case S390_VIRT_CKC_REGNUM:
+    case S390_VIRT_TCG_CKC_REGNUM:
         return gdb_get_regl(mem_buf, env->ckc);
-    case S390_VIRT_CPUTM_REGNUM:
+    case S390_VIRT_TCG_CPUTM_REGNUM:
         return gdb_get_regl(mem_buf, env->cputm);
-    case S390_VIRT_BEA_REGNUM:
+    case S390_VIRT_TCG_BEA_REGNUM:
         return gdb_get_regl(mem_buf, env->gbea);
-    case S390_VIRT_PREFIX_REGNUM:
+    case S390_VIRT_TCG_PREFIX_REGNUM:
         return gdb_get_regl(mem_buf, env->psa);
-    case S390_VIRT_PP_REGNUM:
-        return gdb_get_regl(mem_buf, env->pp);
-    case S390_VIRT_PFT_REGNUM:
-        return gdb_get_regl(mem_buf, env->pfault_token);
-    case S390_VIRT_PFS_REGNUM:
-        return gdb_get_regl(mem_buf, env->pfault_select);
-    case S390_VIRT_PFC_REGNUM:
-        return gdb_get_regl(mem_buf, env->pfault_compare);
     default:
         return 0;
     }
 }
 
-static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+static int cpu_write_virt_tcg_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
 {
     switch (n) {
-    case S390_VIRT_CKC_REGNUM:
+    case S390_VIRT_TCG_CKC_REGNUM:
         env->ckc = ldtul_p(mem_buf);
         cpu_synchronize_post_init(env_cpu(env));
         return 8;
-    case S390_VIRT_CPUTM_REGNUM:
+    case S390_VIRT_TCG_CPUTM_REGNUM:
         env->cputm = ldtul_p(mem_buf);
         cpu_synchronize_post_init(env_cpu(env));
         return 8;
-    case S390_VIRT_BEA_REGNUM:
+    case S390_VIRT_TCG_BEA_REGNUM:
         env->gbea = ldtul_p(mem_buf);
         cpu_synchronize_post_init(env_cpu(env));
         return 8;
-    case S390_VIRT_PREFIX_REGNUM:
+    case S390_VIRT_TCG_PREFIX_REGNUM:
         env->psa = ldtul_p(mem_buf);
         cpu_synchronize_post_init(env_cpu(env));
         return 8;
+    default:
+        return 0;
+    }
+}
+
+/* the values represent the positions in s390-virt.xml */
+#define S390_VIRT_PP_REGNUM     0
+#define S390_VIRT_PFT_REGNUM    1
+#define S390_VIRT_PFS_REGNUM    2
+#define S390_VIRT_PFC_REGNUM    3
+/* total number of registers in s390-virt.xml */
+#define S390_NUM_VIRT_REGS 4
+
+static int cpu_read_virt_reg(CPUS390XState *env, GByteArray *mem_buf, int n)
+{
+    switch (n) {
+    case S390_VIRT_PP_REGNUM:
+        return gdb_get_regl(mem_buf, env->pp);
+    case S390_VIRT_PFT_REGNUM:
+        return gdb_get_regl(mem_buf, env->pfault_token);
+    case S390_VIRT_PFS_REGNUM:
+        return gdb_get_regl(mem_buf, env->pfault_select);
+    case S390_VIRT_PFC_REGNUM:
+        return gdb_get_regl(mem_buf, env->pfault_compare);
+    default:
+        return 0;
+    }
+}
+
+static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+    switch (n) {
     case S390_VIRT_PP_REGNUM:
         env->pp = ldtul_p(mem_buf);
         cpu_synchronize_post_init(env_cpu(env));
@@ -320,6 +340,10 @@ void s390_cpu_gdb_init(CPUState *cs)
                              cpu_write_c_reg,
                              S390_NUM_C_REGS, "s390-cr.xml", 0);
 
+    gdb_register_coprocessor(cs, cpu_read_virt_tcg_reg,
+                             cpu_write_virt_tcg_reg,
+                             S390_NUM_VIRT_TCG_REGS, "s390-virt-tcg.xml", 0);
+
     if (kvm_enabled()) {
         gdb_register_coprocessor(cs, cpu_read_virt_reg,
                                  cpu_write_virt_reg,
-- 
2.39.2

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