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* Clarify s390x CPU topology docs and CPU compatibility error messages

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* Improve the Sparc CPU help text
 * Rename SOFTMMU to SYSTEM in the travis.yml file
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Merge tag 'pull-request-2024-03-18' of https://gitlab.com/thuth/qemu into staging

* Clarify s390x CPU topology docs and CPU compatibility error messages
* Improve the Sparc CPU help text
* Rename SOFTMMU to SYSTEM in the travis.yml file

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# gpg:                 aka "Thomas Huth <huth@tuxfamily.org>" [full]
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* tag 'pull-request-2024-03-18' of https://gitlab.com/thuth/qemu:
  travis-ci: Rename SOFTMMU -> SYSTEM
  target/sparc/cpu: Improve the CPU help text
  target/s390x: improve cpu compatibility check error message
  docs/s390: clarify even more that cpu-topology is KVM-only

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2024-03-19 10:25:25 +00:00
commit ddc27d2ad9
5 changed files with 32 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
.travis.yml
View File

@ -35,7 +35,7 @@ env:
- TEST_BUILD_CMD=""
- TEST_CMD="make check V=1"
# This is broadly a list of "mainline" system targets which have support across the major distros
- MAIN_SOFTMMU_TARGETS="aarch64-softmmu,mips64-softmmu,ppc64-softmmu,riscv64-softmmu,s390x-softmmu,x86_64-softmmu"
- MAIN_SYSTEM_TARGETS="aarch64-softmmu,mips64-softmmu,ppc64-softmmu,riscv64-softmmu,s390x-softmmu,x86_64-softmmu"
- CCACHE_SLOPPINESS="include_file_ctime,include_file_mtime"
- CCACHE_MAXSIZE=1G
- G_MESSAGES_DEBUG=error
@ -114,7 +114,7 @@ jobs:
env:
- TEST_CMD="make check check-tcg V=1"
- CONFIG="--disable-containers --enable-fdt=system
--target-list=${MAIN_SOFTMMU_TARGETS} --cxx=/bin/false"
--target-list=${MAIN_SYSTEM_TARGETS} --cxx=/bin/false"
- UNRELIABLE=true
- name: "[ppc64] GCC check-tcg"
@ -185,7 +185,7 @@ jobs:
env:
- TEST_CMD="make check check-tcg V=1"
- CONFIG="--disable-containers --enable-fdt=system
--target-list=${MAIN_SOFTMMU_TARGETS},s390x-linux-user"
--target-list=${MAIN_SYSTEM_TARGETS},s390x-linux-user"
- UNRELIABLE=true
script:
- BUILD_RC=0 && make -j${JOBS} || BUILD_RC=$?
@ -226,7 +226,7 @@ jobs:
- genisoimage
env:
- CONFIG="--disable-containers --enable-fdt=system --audio-drv-list=sdl
--disable-user --target-list-exclude=${MAIN_SOFTMMU_TARGETS}"
--disable-user --target-list-exclude=${MAIN_SYSTEM_TARGETS}"
- name: "[s390x] GCC (user)"
arch: s390x

2
docs/system/introduction.rst
View File

@ -1,6 +1,8 @@
Introduction
============
.. _Accelerators:
Virtualisation Accelerators
---------------------------

14
docs/system/s390x/cpu-topology.rst
View File

@ -25,17 +25,19 @@ monitor polarization changes, see ``docs/devel/s390-cpu-topology.rst``.
Prerequisites
-------------
To use the CPU topology, you need to run with KVM on a s390x host that
uses the Linux kernel v6.0 or newer (which provide the so-called
To use the CPU topology, you currently need to choose the KVM accelerator.
See :ref:`Accelerators` for more details about accelerators and how to select them.
The s390x host needs to use a Linux kernel v6.0 or newer (which provides the so-called
``KVM_CAP_S390_CPU_TOPOLOGY`` capability that allows QEMU to signal the
CPU topology facility via the so-called STFLE bit 11 to the VM).
Enabling CPU topology
---------------------
Currently, CPU topology is only enabled in the host model by default.
Currently, CPU topology is enabled by default only in the "host" CPU model.
Enabling CPU topology in a CPU model is done by setting the CPU flag
Enabling CPU topology in another CPU model is done by setting the CPU flag
``ctop`` to ``on`` as in:
.. code-block:: bash
@ -132,7 +134,7 @@ In the following machine we define 8 sockets with 4 cores each.
.. code-block:: bash
$ qemu-system-s390x -m 2G \
$ qemu-system-s390x -accel kvm -m 2G \
-cpu gen16b,ctop=on \
-smp cpus=5,sockets=8,cores=4,maxcpus=32 \
-device host-s390x-cpu,core-id=14 \
@ -227,7 +229,7 @@ with vertical high entitlement.
.. code-block:: bash
$ qemu-system-s390x -m 2G \
$ qemu-system-s390x -accel kvm -m 2G \
-cpu gen16b,ctop=on \
-smp cpus=1,sockets=8,cores=4,maxcpus=32 \
\

22
target/s390x/cpu_models.c
View File

@ -500,6 +500,16 @@ static void error_prepend_missing_feat(const char *name, void *opaque)
error_prepend((Error **) opaque, "%s ", name);
}
static void check_compat_model_failed(Error **errp,
const S390CPUModel *max_model,
const char *msg)
{
error_setg(errp, "%s. Maximum supported model in the current configuration: \'%s\'",
msg, max_model->def->name);
error_append_hint(errp, "Consider a different accelerator, try \"-accel help\"\n");
return;
}
static void check_compatibility(const S390CPUModel *max_model,
const S390CPUModel *model, Error **errp)
{
@ -507,15 +517,11 @@ static void check_compatibility(const S390CPUModel *max_model,
S390FeatBitmap missing;
if (model->def->gen > max_model->def->gen) {
error_setg(errp, "Selected CPU generation is too new. Maximum "
"supported model in the configuration: \'%s\'",
max_model->def->name);
check_compat_model_failed(errp, max_model, "Selected CPU generation is too new");
return;
} else if (model->def->gen == max_model->def->gen &&
model->def->ec_ga > max_model->def->ec_ga) {
error_setg(errp, "Selected CPU GA level is too new. Maximum "
"supported model in the configuration: \'%s\'",
max_model->def->name);
check_compat_model_failed(errp, max_model, "Selected CPU GA level is too new");
return;
}
@ -537,7 +543,9 @@ static void check_compatibility(const S390CPUModel *max_model,
error_setg(errp, " ");
s390_feat_bitmap_to_ascii(missing, errp, error_prepend_missing_feat);
error_prepend(errp, "Some features requested in the CPU model are not "
"available in the configuration: ");
"available in the current configuration: ");
error_append_hint(errp,
"Consider a different accelerator, QEMU, or kernel version\n");
}
S390CPUModel *get_max_cpu_model(Error **errp)

5
target/sparc/cpu.c
View File

@ -574,9 +574,10 @@ void sparc_cpu_list(void)
{
unsigned int i;
qemu_printf("Available CPU types:\n");
for (i = 0; i < ARRAY_SIZE(sparc_defs); i++) {
qemu_printf("Sparc %16s IU " TARGET_FMT_lx
" FPU %08x MMU %08x NWINS %d ",
qemu_printf(" %-20s (IU " TARGET_FMT_lx
" FPU %08x MMU %08x NWINS %d) ",
sparc_defs[i].name,
sparc_defs[i].iu_version,
sparc_defs[i].fpu_version,