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[Qemu-devel] [RFC 07/14] Add PMU to ARM virt platform
From: |
Christopher Covington |
Subject: |
[Qemu-devel] [RFC 07/14] Add PMU to ARM virt platform |
Date: |
Wed, 5 Aug 2015 12:51:16 -0400 |
This reserves one PPI (private peripheral interrupt) for the PMU and
creates a corresponding entry in the device tree.
Writteb by Aaron Lindsay.
Signed-off-by: Christopher Covington <address@hidden>
---
hw/arm/virt.c | 21 +++++++++++++++++++++
target-arm/cpu-qom.h | 4 ++--
target-arm/cpu.c | 8 ++++----
target-arm/cpu.h | 3 ++-
target-arm/helper.c | 6 +++---
5 files changed, 32 insertions(+), 10 deletions(-)
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 565f573..bd1fbb6 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -295,6 +295,23 @@ static void fdt_add_timer_nodes(const VirtBoardInfo *vbi)
GIC_FDT_IRQ_TYPE_PPI, 10, irqflags);
}
+static void fdt_add_pmu_nodes(const VirtBoardInfo *vbi)
+{
+ uint32_t irqflags = GIC_FDT_IRQ_FLAGS_EDGE_LO_HI;
+ const char nodename[] = "/pmu";
+ const char compat[] = "arm,armv8-pmuv3\0arm,cortex-a15-pmu";
+
+ irqflags = deposit32(irqflags, GIC_FDT_IRQ_PPI_CPU_START,
+ GIC_FDT_IRQ_PPI_CPU_WIDTH, (1 << vbi->smp_cpus) - 1);
+
+
+ qemu_fdt_add_subnode(vbi->fdt, nodename);
+ qemu_fdt_setprop(vbi->fdt, nodename, "compatible", compat, sizeof(compat));
+
+ qemu_fdt_setprop_cells(vbi->fdt, nodename, "interrupts",
+ GIC_FDT_IRQ_TYPE_PPI, 7, irqflags);
+}
+
static void fdt_add_cpu_nodes(const VirtBoardInfo *vbi)
{
int cpu;
@@ -384,6 +401,9 @@ static uint32_t create_gic(const VirtBoardInfo *vbi,
qemu_irq *pic)
/* virtual timer */
qdev_connect_gpio_out(cpudev, 1,
qdev_get_gpio_in(gicdev, ppibase + 27));
+ /* PMU */
+ qdev_connect_gpio_out(cpudev, 2,
+ qdev_get_gpio_in(gicdev, ppibase + 23));
sysbus_connect_irq(gicbusdev, i, qdev_get_gpio_in(cpudev,
ARM_CPU_IRQ));
}
@@ -802,6 +822,7 @@ static void machvirt_init(MachineState *machine)
}
g_strfreev(cpustr);
fdt_add_timer_nodes(vbi);
+ fdt_add_pmu_nodes(vbi);
fdt_add_cpu_nodes(vbi);
fdt_add_psci_node(vbi);
diff --git a/target-arm/cpu-qom.h b/target-arm/cpu-qom.h
index ed5a644..bb6722f 100644
--- a/target-arm/cpu-qom.h
+++ b/target-arm/cpu-qom.h
@@ -84,8 +84,8 @@ typedef struct ARMCPU {
/* Timers used by the generic (architected) timer */
QEMUTimer *gt_timer[NUM_GTIMERS];
- /* GPIO outputs for generic timer */
- qemu_irq gt_timer_outputs[NUM_GTIMERS];
+ /* GPIO outputs for generic timer and PMU */
+ qemu_irq ppi_outputs[NUM_GTIMERS + 1];
/* 'compatible' string for this CPU for Linux device trees */
const char *dtb_compatible;
diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index 3ca3fa8..87d0772 100644
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -379,17 +379,17 @@ static void arm_cpu_initfn(Object *obj)
/* VIRQ and VFIQ are unused with KVM but we add them to maintain
* the same interface as non-KVM CPUs.
*/
- qdev_init_gpio_in(DEVICE(cpu), arm_cpu_kvm_set_irq, 4);
+ qdev_init_gpio_in(DEVICE(cpu), arm_cpu_kvm_set_irq, 5);
} else {
- qdev_init_gpio_in(DEVICE(cpu), arm_cpu_set_irq, 4);
+ qdev_init_gpio_in(DEVICE(cpu), arm_cpu_set_irq, 5);
}
cpu->gt_timer[GTIMER_PHYS] = timer_new(QEMU_CLOCK_VIRTUAL, GTIMER_SCALE,
arm_gt_ptimer_cb, cpu);
cpu->gt_timer[GTIMER_VIRT] = timer_new(QEMU_CLOCK_VIRTUAL, GTIMER_SCALE,
arm_gt_vtimer_cb, cpu);
- qdev_init_gpio_out(DEVICE(cpu), cpu->gt_timer_outputs,
- ARRAY_SIZE(cpu->gt_timer_outputs));
+ qdev_init_gpio_out(DEVICE(cpu), cpu->ppi_outputs,
+ ARRAY_SIZE(cpu->ppi_outputs));
#endif
/* DTB consumers generally don't in fact care what the 'compatible'
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 2525569..44084a5 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -112,9 +112,10 @@ typedef struct ARMGenericTimer {
uint64_t ctl; /* Timer Control register */
} ARMGenericTimer;
+#define NUM_GTIMERS 2
#define GTIMER_PHYS 0
#define GTIMER_VIRT 1
-#define NUM_GTIMERS 2
+#define PMU_IDX 2
typedef struct {
uint64_t raw_tcr;
diff --git a/target-arm/helper.c b/target-arm/helper.c
index d2c02be..1843ec5 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -1216,7 +1216,7 @@ static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
uint64_t nexttick;
gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
- qemu_set_irq(cpu->gt_timer_outputs[timeridx],
+ qemu_set_irq(cpu->ppi_outputs[timeridx],
(istatus && !(gt->ctl & 2)));
if (istatus) {
/* Next transition is when count rolls back over to zero */
@@ -1237,7 +1237,7 @@ static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
} else {
/* Timer disabled: ISTATUS and timer output always clear */
gt->ctl &= ~4;
- qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
+ qemu_set_irq(cpu->ppi_outputs[timeridx], 0);
timer_del(cpu->gt_timer[timeridx]);
}
}
@@ -1297,7 +1297,7 @@ static void gt_ctl_write(CPUARMState *env, const
ARMCPRegInfo *ri,
/* IMASK toggled: don't need to recalculate,
* just set the interrupt line based on ISTATUS
*/
- qemu_set_irq(cpu->gt_timer_outputs[timeridx],
+ qemu_set_irq(cpu->ppi_outputs[timeridx],
(oldval & 4) && !(value & 2));
}
}
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
- [Qemu-devel] [RFC 01/14] Make unknown semihosting calls non-fatal, (continued)
- [Qemu-devel] [RFC 01/14] Make unknown semihosting calls non-fatal, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 03/14] Fix makefile, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 04/14] Modify load exclusive/store exclusive to use physical addresses with the monitor, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 02/14] Added semihosting support for A64 in full-system mode, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 05/14] Fixed TLB invalidate ops., Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 12/14] bbvec: Detect mode changes after uncached_cpsr update, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 10/14] bbvec: Move mode/PID change detection to register writes, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 07/14] Add PMU to ARM virt platform,
Christopher Covington <=
- [Qemu-devel] [RFC 08/14] Add instruction-counting infrastructure to target-arm, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 13/14] Enable negative icount values for QEMU., Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 11/14] Print bbvec stats on 'magic' exceptions, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 09/14] Implement remaining PMU functionality, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 06/14] Added support for block profiling for AArch32 and Aarch64, Christopher Covington, 2015/08/05
- [Qemu-devel] [RFC 14/14] bbvec: Properly detect conditional thumb2 branching instructions, Christopher Covington, 2015/08/05
- Re: [Qemu-devel] RFC: ARM Semihosting, PMU, and BBV Changes, Peter Maydell, 2015/08/11