From: Ilya Leoshkevich <iii@linux.ibm.com>
To: "Laurent Vivier" <laurent@vivier.eu>,
"Halil Pasic" <pasic@linux.ibm.com>,
"Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Thomas Huth" <thuth@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"Richard Henderson" <richard.henderson@linaro.org>,
"David Hildenbrand" <david@redhat.com>
Cc: qemu-devel@nongnu.org, qemu-s390x@nongnu.org,
Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH v2] s390x/gdb: Split s390-virt.xml
Date: Tue, 14 Mar 2023 11:18:13 +0100 [thread overview]
Message-ID: <20230314101813.174874-1-iii@linux.ibm.com> (raw)
Both TCG and KVM emulate ckc, cputm, last_break and prefix, and it's
quite useful to have them during debugging. Right now they are grouped
together with KVM-only pp, pfault_token, pfault_select and
pfault_compare in s390-virt.xml, and are not available when debugging
TCG-emulated code.
Move KVM-only registers into the new s390-virt-kvm.xml file. Advertise
s390-virt.xml always, and the new s390-virt-kvm.xml only for KVM.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230313211614.98739-1-iii@linux.ibm.com>
---
v1: https://lists.gnu.org/archive/html/qemu-devel/2023-03/msg04307.html
v1 -> v2: Improve the naming and the commit message (Christian).
configs/targets/s390x-linux-user.mak | 2 +-
configs/targets/s390x-softmmu.mak | 2 +-
gdb-xml/s390-virt-kvm.xml | 14 ++++++
gdb-xml/s390-virt.xml | 4 --
target/s390x/gdbstub.c | 65 +++++++++++++++++++---------
5 files changed, 61 insertions(+), 26 deletions(-)
create mode 100644 gdb-xml/s390-virt-kvm.xml
diff --git a/configs/targets/s390x-linux-user.mak b/configs/targets/s390x-linux-user.mak
index e2978248ede..24c04c85894 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-kvm.xml gdb-xml/s390-gs.xml
diff --git a/configs/targets/s390x-softmmu.mak b/configs/targets/s390x-softmmu.mak
index 258b4cf3582..70d2f9f0ba0 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-kvm.xml gdb-xml/s390-gs.xml
diff --git a/gdb-xml/s390-virt-kvm.xml b/gdb-xml/s390-virt-kvm.xml
new file mode 100644
index 00000000000..a256eddaf57
--- /dev/null
+++ b/gdb-xml/s390-virt-kvm.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.kvm">
+ <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"/>
+ <reg name="pfault_compare" bitsize="64" type="uint64" group="system"/>
+</feature>
diff --git a/gdb-xml/s390-virt.xml b/gdb-xml/s390-virt.xml
index e2e9a7ad3cc..438eb68aabe 100644
--- a/gdb-xml/s390-virt.xml
+++ b/gdb-xml/s390-virt.xml
@@ -11,8 +11,4 @@
<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"/>
- <reg name="pfault_compare" bitsize="64" type="uint64" group="system"/>
</feature>
diff --git a/target/s390x/gdbstub.c b/target/s390x/gdbstub.c
index a5d69d0e0bc..e1153f5dc4a 100644
--- a/target/s390x/gdbstub.c
+++ b/target/s390x/gdbstub.c
@@ -205,12 +205,8 @@ static int cpu_write_c_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
#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
+#define S390_NUM_VIRT_REGS 4
static int cpu_read_virt_reg(CPUS390XState *env, GByteArray *mem_buf, int n)
{
@@ -223,14 +219,6 @@ static int cpu_read_virt_reg(CPUS390XState *env, GByteArray *mem_buf, int n)
return gdb_get_regl(mem_buf, env->gbea);
case S390_VIRT_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;
}
@@ -255,19 +243,51 @@ static int cpu_write_virt_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
env->psa = ldtul_p(mem_buf);
cpu_synchronize_post_init(env_cpu(env));
return 8;
- case S390_VIRT_PP_REGNUM:
+ default:
+ return 0;
+ }
+}
+
+/* the values represent the positions in s390-virt-kvm.xml */
+#define S390_VIRT_KVM_PP_REGNUM 0
+#define S390_VIRT_KVM_PFT_REGNUM 1
+#define S390_VIRT_KVM_PFS_REGNUM 2
+#define S390_VIRT_KVM_PFC_REGNUM 3
+/* total number of registers in s390-virt-kvm.xml */
+#define S390_NUM_VIRT_KVM_REGS 4
+
+static int cpu_read_virt_kvm_reg(CPUS390XState *env, GByteArray *mem_buf, int n)
+{
+ switch (n) {
+ case S390_VIRT_KVM_PP_REGNUM:
+ return gdb_get_regl(mem_buf, env->pp);
+ case S390_VIRT_KVM_PFT_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_token);
+ case S390_VIRT_KVM_PFS_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_select);
+ case S390_VIRT_KVM_PFC_REGNUM:
+ return gdb_get_regl(mem_buf, env->pfault_compare);
+ default:
+ return 0;
+ }
+}
+
+static int cpu_write_virt_kvm_reg(CPUS390XState *env, uint8_t *mem_buf, int n)
+{
+ switch (n) {
+ case S390_VIRT_KVM_PP_REGNUM:
env->pp = ldtul_p(mem_buf);
cpu_synchronize_post_init(env_cpu(env));
return 8;
- case S390_VIRT_PFT_REGNUM:
+ case S390_VIRT_KVM_PFT_REGNUM:
env->pfault_token = ldtul_p(mem_buf);
cpu_synchronize_post_init(env_cpu(env));
return 8;
- case S390_VIRT_PFS_REGNUM:
+ case S390_VIRT_KVM_PFS_REGNUM:
env->pfault_select = ldtul_p(mem_buf);
cpu_synchronize_post_init(env_cpu(env));
return 8;
- case S390_VIRT_PFC_REGNUM:
+ case S390_VIRT_KVM_PFC_REGNUM:
env->pfault_compare = ldtul_p(mem_buf);
cpu_synchronize_post_init(env_cpu(env));
return 8;
@@ -320,10 +340,15 @@ 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_reg,
+ cpu_write_virt_reg,
+ S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
+
if (kvm_enabled()) {
- gdb_register_coprocessor(cs, cpu_read_virt_reg,
- cpu_write_virt_reg,
- S390_NUM_VIRT_REGS, "s390-virt.xml", 0);
+ gdb_register_coprocessor(cs, cpu_read_virt_kvm_reg,
+ cpu_write_virt_kvm_reg,
+ S390_NUM_VIRT_KVM_REGS, "s390-virt-kvm.xml",
+ 0);
}
#endif
}
--
2.39.2
next reply other threads:[~2023-03-14 10:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-14 10:18 Ilya Leoshkevich [this message]
2023-04-20 15:41 ` [PATCH v2] s390x/gdb: Split s390-virt.xml Thomas Huth
2023-04-20 17:17 ` David Hildenbrand
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