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machine: pass QAPI struct to mc->smp_parse

Browse source 
As part of converting -smp to a property with a QAPI type, define
the struct and use it to do the actual parsing.  machine_smp_parse
takes care of doing the QemuOpts->QAPI conversion by hand, for now.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210617155308.928754-10-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-06-17 17:53:06 +02:00
parent abc2f51144
commit 1e63fe6858
4 changed files with 60 additions and 21 deletions
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33
hw/core/machine.c
View file

@ -739,12 +739,12 @@ void machine_set_cpu_numa_node(MachineState *machine,
}
}
static void smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
static void smp_parse(MachineState *ms, SMPConfiguration *config, Error **errp)
{
unsigned cpus = qemu_opt_get_number(opts, "cpus", 0);
unsigned sockets = qemu_opt_get_number(opts, "sockets", 0);
unsigned cores = qemu_opt_get_number(opts, "cores", 0);
unsigned threads = qemu_opt_get_number(opts, "threads", 0);
unsigned cpus = config->has_cpus ? config->cpus : 0;
unsigned sockets = config->has_sockets ? config->sockets : 0;
unsigned cores = config->has_cores ? config->cores : 0;
unsigned threads = config->has_threads ? config->threads : 0;
/* compute missing values, prefer sockets over cores over threads */
if (cpus == 0 || sockets == 0) {
@ -754,8 +754,7 @@ static void smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
sockets = sockets > 0 ? sockets : 1;
cpus = cores * threads * sockets;
} else {
ms->smp.max_cpus =
qemu_opt_get_number(opts, "maxcpus", cpus);
ms->smp.max_cpus = config->has_maxcpus ? config->maxcpus : cpus;
sockets = ms->smp.max_cpus / (cores * threads);
}
} else if (cores == 0) {
@ -773,8 +772,7 @@ static void smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
return;
}
ms->smp.max_cpus =
qemu_opt_get_number(opts, "maxcpus", cpus);
ms->smp.max_cpus = config->has_maxcpus ? config->maxcpus : cpus;
if (ms->smp.max_cpus < cpus) {
error_setg(errp, "maxcpus must be equal to or greater than smp");
@ -1129,7 +1127,22 @@ bool machine_smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
ERRP_GUARD();
if (opts) {
mc->smp_parse(ms, opts, errp);
SMPConfiguration config = {
.has_cpus = !!qemu_opt_get(opts, "cpus"),
.cpus = qemu_opt_get_number(opts, "cpus", 0),
.has_sockets = !!qemu_opt_get(opts, "sockets"),
.sockets = qemu_opt_get_number(opts, "sockets", 0),
.has_dies = !!qemu_opt_get(opts, "dies"),
.dies = qemu_opt_get_number(opts, "dies", 0),
.has_cores = !!qemu_opt_get(opts, "cores"),
.cores = qemu_opt_get_number(opts, "cores", 0),
.has_threads = !!qemu_opt_get(opts, "threads"),
.threads = qemu_opt_get_number(opts, "threads", 0),
.has_maxcpus = !!qemu_opt_get(opts, "maxcpus"),
.maxcpus = qemu_opt_get_number(opts, "maxcpus", 0),
};
mc->smp_parse(ms, &config, errp);
if (*errp) {
return false;
}

18
hw/i386/pc.c
View file

@ -710,13 +710,13 @@ void pc_acpi_smi_interrupt(void *opaque, int irq, int level)
* This function is very similar to smp_parse()
* in hw/core/machine.c but includes CPU die support.
*/
static void pc_smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
static void pc_smp_parse(MachineState *ms, SMPConfiguration *config, Error **errp)
{
unsigned cpus = qemu_opt_get_number(opts, "cpus", 0);
unsigned sockets = qemu_opt_get_number(opts, "sockets", 0);
unsigned dies = qemu_opt_get_number(opts, "dies", 1);
unsigned cores = qemu_opt_get_number(opts, "cores", 0);
unsigned threads = qemu_opt_get_number(opts, "threads", 0);
unsigned cpus = config->has_cpus ? config->cpus : 0;
unsigned sockets = config->has_sockets ? config->sockets : 0;
unsigned dies = config->has_dies ? config->dies : 1;
unsigned cores = config->has_cores ? config->cores : 0;
unsigned threads = config->has_threads ? config->threads : 0;
/* compute missing values, prefer sockets over cores over threads */
if (cpus == 0 || sockets == 0) {
@ -726,8 +726,7 @@ static void pc_smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
sockets = sockets > 0 ? sockets : 1;
cpus = cores * threads * dies * sockets;
} else {
ms->smp.max_cpus =
qemu_opt_get_number(opts, "maxcpus", cpus);
ms->smp.max_cpus = config->has_maxcpus ? config->maxcpus : cpus;
sockets = ms->smp.max_cpus / (cores * threads * dies);
}
} else if (cores == 0) {
@ -745,8 +744,7 @@ static void pc_smp_parse(MachineState *ms, QemuOpts *opts, Error **errp)
return;
}
ms->smp.max_cpus =
qemu_opt_get_number(opts, "maxcpus", cpus);
ms->smp.max_cpus = config->has_maxcpus ? config->maxcpus : cpus;
if (ms->smp.max_cpus < cpus) {
error_setg(errp, "maxcpus must be equal to or greater than smp");

2
include/hw/boards.h
View file

@ -210,7 +210,7 @@ struct MachineClass {
void (*reset)(MachineState *state);
void (*wakeup)(MachineState *state);
int (*kvm_type)(MachineState *machine, const char *arg);
void (*smp_parse)(MachineState *ms, QemuOpts *opts, Error **errp);
void (*smp_parse)(MachineState *ms, SMPConfiguration *config, Error **errp);
BlockInterfaceType block_default_type;
int units_per_default_bus;

28
qapi/machine.json
View file

@ -1284,3 +1284,31 @@
##
{ 'event': 'MEM_UNPLUG_ERROR',
'data': { 'device': 'str', 'msg': 'str' } }
##
# @SMPConfiguration:
#
# Schema for CPU topology configuration. "0" or a missing value lets
# QEMU figure out a suitable value based on the ones that are provided.
#
# @cpus: number of virtual CPUs in the virtual machine
#
# @sockets: number of sockets in the CPU topology
#
# @dies: number of dies per socket in the CPU topology
#
# @cores: number of cores per thread in the CPU topology
#
# @threads: number of threads per core in the CPU topology
#
# @maxcpus: maximum number of hotpluggable virtual CPUs in the virtual machine
#
# Since: 6.1
##
{ 'struct': 'SMPConfiguration', 'data': {
'*cpus': 'int',
'*sockets': 'int',
'*dies': 'int',
'*cores': 'int',
'*threads': 'int',
'*maxcpus': 'int' } }