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s390x/gdb: Split s390-virt.xml

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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: <20230314101813.174874-1-iii@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-03-14 11:18:13 +01:00 committed by Thomas Huth
parent cc5ee50fff
commit 8afc43ea63
5 changed files with 61 additions and 26 deletions
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2
configs/targets/s390x-linux-user.mak
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@ -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

2
configs/targets/s390x-softmmu.mak
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@ -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

14
gdb-xml/s390-virt-kvm.xml Normal file
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@ -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>

4
gdb-xml/s390-virt.xml
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@ -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>

61
target/s390x/gdbstub.c
View File

@ -206,12 +206,8 @@ 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)
{
@ -224,14 +220,6 @@ 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;
}
@ -256,19 +244,51 @@ 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;
@ -321,10 +341,15 @@ void s390_cpu_gdb_init(CPUState *cs)
cpu_write_c_reg,
S390_NUM_C_REGS, "s390-cr.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);
if (kvm_enabled()) {
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
}