aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorShannon Zhao <shannon.zhao@linaro.org>2016-06-14 15:59:12 +0100
committerPeter Maydell <peter.maydell@linaro.org>2016-06-14 15:59:12 +0100
commit01fe6b6076c5a90e1a5f100f67968fcada8daff8 (patch)
tree5c04449c6822b7bcf844d4021dd55c0dde94c74f
parent5c0a3819f009639f67ce0453dff6ec7211bfee54 (diff)
hw/arm/virt: Add PMU node for virt machine
Add a virtual PMU device for virt machine while use PPI 7 for PMU overflow interrupt number. Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org> Reviewed-by: Andrew Jones <drjones@redhat.com> Message-id: 1465267577-1808-3-git-send-email-zhaoshenglong@huawei.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/arm/virt.c33
-rw-r--r--include/hw/arm/virt.h4
-rw-r--r--target-arm/kvm32.c6
-rw-r--r--target-arm/kvm64.c41
-rw-r--r--target-arm/kvm_arm.h7
5 files changed, 91 insertions, 0 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 73113cfc4d..0f830a35b3 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -436,6 +436,37 @@ static void fdt_add_gic_node(VirtBoardInfo *vbi, int type)
qemu_fdt_setprop_cell(vbi->fdt, "/intc", "phandle", vbi->gic_phandle);
}
+static void fdt_add_pmu_nodes(const VirtBoardInfo *vbi, int gictype)
+{
+ CPUState *cpu;
+ ARMCPU *armcpu;
+ uint32_t irqflags = GIC_FDT_IRQ_FLAGS_LEVEL_HI;
+
+ CPU_FOREACH(cpu) {
+ armcpu = ARM_CPU(cpu);
+ if (!armcpu->has_pmu ||
+ !kvm_arm_pmu_create(cpu, PPI(VIRTUAL_PMU_IRQ))) {
+ return;
+ }
+ }
+
+ if (gictype == 2) {
+ irqflags = deposit32(irqflags, GIC_FDT_IRQ_PPI_CPU_START,
+ GIC_FDT_IRQ_PPI_CPU_WIDTH,
+ (1 << vbi->smp_cpus) - 1);
+ }
+
+ armcpu = ARM_CPU(qemu_get_cpu(0));
+ qemu_fdt_add_subnode(vbi->fdt, "/pmu");
+ if (arm_feature(&armcpu->env, ARM_FEATURE_V8)) {
+ const char compat[] = "arm,armv8-pmuv3";
+ qemu_fdt_setprop(vbi->fdt, "/pmu", "compatible",
+ compat, sizeof(compat));
+ qemu_fdt_setprop_cells(vbi->fdt, "/pmu", "interrupts",
+ GIC_FDT_IRQ_TYPE_PPI, VIRTUAL_PMU_IRQ, irqflags);
+ }
+}
+
static void create_v2m(VirtBoardInfo *vbi, qemu_irq *pic)
{
int i;
@@ -1259,6 +1290,8 @@ static void machvirt_init(MachineState *machine)
create_gic(vbi, pic, gic_version, vms->secure);
+ fdt_add_pmu_nodes(vbi, gic_version);
+
create_uart(vbi, pic, VIRT_UART, sysmem, serial_hds[0]);
if (vms->secure) {
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 82703d2ecd..9650193253 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -41,6 +41,10 @@
#define ARCH_TIMER_NS_EL1_IRQ 14
#define ARCH_TIMER_NS_EL2_IRQ 10
+#define VIRTUAL_PMU_IRQ 7
+
+#define PPI(irq) ((irq) + 16)
+
enum {
VIRT_FLASH,
VIRT_MEM,
diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index c03e3e526a..c35c676e14 100644
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -522,3 +522,9 @@ bool kvm_arm_hw_debug_active(CPUState *cs)
{
return false;
}
+
+int kvm_arm_pmu_create(CPUState *cs, int irq)
+{
+ qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__);
+ return 0;
+}
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index 75383c84dd..2d6a310ebb 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -382,6 +382,47 @@ 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)
+{
+ int err;
+
+ 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;
+}
static inline void set_feature(uint64_t *features, int feature)
{
diff --git a/target-arm/kvm_arm.h b/target-arm/kvm_arm.h
index 345233c18b..a4193684a8 100644
--- a/target-arm/kvm_arm.h
+++ b/target-arm/kvm_arm.h
@@ -194,6 +194,8 @@ int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu);
int kvm_arm_vgic_probe(void);
+int kvm_arm_pmu_create(CPUState *cs, int irq);
+
#else
static inline int kvm_arm_vgic_probe(void)
@@ -201,6 +203,11 @@ static inline int kvm_arm_vgic_probe(void)
return 0;
}
+static inline int kvm_arm_pmu_create(CPUState *cs, int irq)
+{
+ return 0;
+}
+
#endif
static inline const char *gic_class_name(void)