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target/arm/kvm: pmu: split init and set-irq stages

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When adding a PMU with a userspace irqchip we skip the set-irq
stage of device creation. Split the 'create' function into two
functions 'init' and 'set-irq' so they may be called separately.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Message-id: 1500471597-2517-3-git-send-email-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Andrew Jones 2017-09-04 15:21:54 +01:00 committed by Peter Maydell
parent 07f48730bc
commit 3f07cb2aab
4 changed files with 53 additions and 36 deletions
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11
hw/arm/virt.c
View File

@ -492,10 +492,17 @@ static void fdt_add_pmu_nodes(const VirtMachineState *vms)
CPU_FOREACH(cpu) {
armcpu = ARM_CPU(cpu);
if (!arm_feature(&armcpu->env, ARM_FEATURE_PMU) ||
(kvm_enabled() && !kvm_arm_pmu_create(cpu, PPI(VIRTUAL_PMU_IRQ)))) {
if (!arm_feature(&armcpu->env, ARM_FEATURE_PMU)) {
return;
}
if (kvm_enabled()) {
if (!kvm_arm_pmu_set_irq(cpu, PPI(VIRTUAL_PMU_IRQ))) {
return;
}
if (!kvm_arm_pmu_init(cpu)) {
return;
}
}
}
if (vms->gic_version == 2) {

8
target/arm/kvm32.c
View File

@ -522,7 +522,13 @@ bool kvm_arm_hw_debug_active(CPUState *cs)
return false;
}
int kvm_arm_pmu_create(CPUState *cs, int irq)
int kvm_arm_pmu_set_irq(CPUState *cs, int irq)
{
qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__);
return 0;
}
int kvm_arm_pmu_init(CPUState *cs)
{
qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__);
return 0;

60
target/arm/kvm64.c
View File

@ -381,46 +381,44 @@ static CPUWatchpoint *find_hw_watchpoint(CPUState *cpu, target_ulong addr)
return NULL;
}
static bool kvm_arm_pmu_support_ctrl(CPUState *cs, struct kvm_device_attr *attr)
{
return kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr) == 0;
}
int kvm_arm_pmu_create(CPUState *cs, int irq)
static bool kvm_arm_pmu_set_attr(CPUState *cs, struct kvm_device_attr *attr)
{
int err;
err = kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr);
if (err != 0) {
return false;
}
err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, attr);
if (err < 0) {
fprintf(stderr, "KVM_SET_DEVICE_ATTR failed: %s\n",
strerror(-err));
abort();
}
return true;
}
int kvm_arm_pmu_init(CPUState *cs)
{
struct kvm_device_attr attr = {
.group = KVM_ARM_VCPU_PMU_V3_CTRL,
.attr = KVM_ARM_VCPU_PMU_V3_INIT,
};
return kvm_arm_pmu_set_attr(cs, &attr);
}
int kvm_arm_pmu_set_irq(CPUState *cs, int irq)
{
struct kvm_device_attr attr = {
.group = KVM_ARM_VCPU_PMU_V3_CTRL,
.addr = (intptr_t)&irq,
.attr = KVM_ARM_VCPU_PMU_V3_IRQ,
.flags = 0,
};
if (!kvm_arm_pmu_support_ctrl(cs, &attr)) {
return 0;
}
err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, &attr);
if (err < 0) {
fprintf(stderr, "KVM_SET_DEVICE_ATTR failed: %s\n",
strerror(-err));
abort();
}
attr.group = KVM_ARM_VCPU_PMU_V3_CTRL;
attr.attr = KVM_ARM_VCPU_PMU_V3_INIT;
attr.addr = 0;
attr.flags = 0;
err = kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, &attr);
if (err < 0) {
fprintf(stderr, "KVM_SET_DEVICE_ATTR failed: %s\n",
strerror(-err));
abort();
}
return 1;
return kvm_arm_pmu_set_attr(cs, &attr);
}
static inline void set_feature(uint64_t *features, int feature)

10
target/arm/kvm_arm.h
View File

@ -195,7 +195,8 @@ int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu);
int kvm_arm_vgic_probe(void);
int kvm_arm_pmu_create(CPUState *cs, int irq);
int kvm_arm_pmu_set_irq(CPUState *cs, int irq);
int kvm_arm_pmu_init(CPUState *cs);
#else
@ -204,7 +205,12 @@ static inline int kvm_arm_vgic_probe(void)
return 0;
}
static inline int kvm_arm_pmu_create(CPUState *cs, int irq)
static inline int kvm_arm_pmu_set_irq(CPUState *cs, int irq)
{
return 0;
}
static inline int kvm_arm_pmu_init(CPUState *cs)
{
return 0;
}