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kvm: add support for -machine kernel_irqchip=split

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This patch adds the initial plumbing for split IRQ chip mode via
KVM_CAP_SPLIT_IRQCHIP. In addition to option processing, a number of
kvm_*_in_kernel macros are defined to help clarify which component is
where.

Signed-off-by: Matt Gingell <gingell@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Matt Gingell 2015-11-16 10:03:06 -08:00 • committed by Paolo Bonzini
parent ff99aa64b1
commit 32c18a2dba
6 changed files with 73 additions and 9 deletions
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49
hw/core/machine.c
View file

@ -11,6 +11,7 @@
*/
#include "hw/boards.h"
#include "qapi-visit.h"
#include "qapi/visitor.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
@ -31,12 +32,39 @@ static void machine_set_accel(Object *obj, const char *value, Error **errp)
ms->accel = g_strdup(value);
}
static void machine_set_kernel_irqchip(Object *obj, bool value, Error **errp)
static void machine_set_kernel_irqchip(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
Error *err = NULL;
MachineState *ms = MACHINE(obj);
OnOffSplit mode;
ms->kernel_irqchip_allowed = value;
ms->kernel_irqchip_required = value;
visit_type_OnOffSplit(v, &mode, name, &err);
if (err) {
error_propagate(errp, err);
return;
} else {
switch (mode) {
case ON_OFF_SPLIT_ON:
ms->kernel_irqchip_allowed = true;
ms->kernel_irqchip_required = true;
ms->kernel_irqchip_split = false;
break;
case ON_OFF_SPLIT_OFF:
ms->kernel_irqchip_allowed = false;
ms->kernel_irqchip_required = false;
ms->kernel_irqchip_split = false;
break;
case ON_OFF_SPLIT_SPLIT:
ms->kernel_irqchip_allowed = true;
ms->kernel_irqchip_required = true;
ms->kernel_irqchip_split = true;
break;
default:
abort();
}
}
}
static void machine_get_kvm_shadow_mem(Object *obj, Visitor *v,
@ -341,12 +369,12 @@ static void machine_initfn(Object *obj)
object_property_set_description(obj, "accel",
"Accelerator list",
NULL);
object_property_add_bool(obj, "kernel-irqchip",
NULL,
machine_set_kernel_irqchip,
NULL);
object_property_add(obj, "kernel-irqchip", "OnOffSplit",
NULL,
machine_set_kernel_irqchip,
NULL, NULL, NULL);
object_property_set_description(obj, "kernel-irqchip",
"Use KVM in-kernel irqchip",
"Configure KVM in-kernel irqchip",
NULL);
object_property_add(obj, "kvm-shadow-mem", "int",
machine_get_kvm_shadow_mem,
@ -472,6 +500,11 @@ bool machine_kernel_irqchip_required(MachineState *machine)
return machine->kernel_irqchip_required;
}
bool machine_kernel_irqchip_split(MachineState *machine)
{
return machine->kernel_irqchip_split;
}
int machine_kvm_shadow_mem(MachineState *machine)
{
return machine->kvm_shadow_mem;