qemu/hw/intc/trace-events
Peter Maydell 6c94851881 target/arm: Split "get pending exception info" from "acknowledge it"
Currently armv7m_nvic_acknowledge_irq() does three things:
 * make the current highest priority pending interrupt active
 * return a bool indicating whether that interrupt is targeting
   Secure or NonSecure state
 * implicitly tell the caller which is the highest priority
   pending interrupt by setting env->v7m.exception

We need to split these jobs, because v7m_exception_taken()
needs to know whether the pending interrupt targets Secure so
it can choose to stack callee-saves registers or not, but it
must not make the interrupt active until after it has done
that stacking, in case the stacking causes a derived exception.
Similarly, it needs to know the number of the pending interrupt
so it can read the correct vector table entry before the
interrupt is made active, because vector table reads might
also cause a derived exception.

Create a new armv7m_nvic_get_pending_irq_info() function which simply
returns information about the highest priority pending interrupt, and
use it to rearrange the v7m_exception_taken() code so we don't
acknowledge the exception until we've done all the things which could
possibly cause a derived exception.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1517324542-6607-3-git-send-email-peter.maydell@linaro.org
2018-02-09 10:40:27 +00:00

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# See docs/devel/tracing.txt for syntax documentation.
# hw/intc/i8259.c
pic_update_irq(bool master, uint8_t imr, uint8_t irr, uint8_t padd) "master %d imr %"PRIu8" irr %"PRIu8" padd %"PRIu8
pic_set_irq(bool master, int irq, int level) "master %d irq %d level %d"
pic_interrupt(int irq, int intno) "irq %d intno %d"
pic_ioport_write(bool master, uint64_t addr, uint64_t val) "master %d addr 0x%"PRIx64" val 0x%"PRIx64
pic_ioport_read(bool master, uint64_t addr, int val) "master %d addr 0x%"PRIx64" val 0x%x"
# hw/intc/apic_common.c
cpu_set_apic_base(uint64_t val) "0x%016"PRIx64
cpu_get_apic_base(uint64_t val) "0x%016"PRIx64
# coalescing
apic_report_irq_delivered(int apic_irq_delivered) "coalescing %d"
apic_reset_irq_delivered(int apic_irq_delivered) "old coalescing %d"
apic_get_irq_delivered(int apic_irq_delivered) "returning coalescing %d"
# hw/intc/apic.c
apic_local_deliver(int vector, uint32_t lvt) "vector %d delivery mode %d"
apic_deliver_irq(uint8_t dest, uint8_t dest_mode, uint8_t delivery_mode, uint8_t vector_num, uint8_t trigger_mode) "dest %d dest_mode %d delivery_mode %d vector %d trigger_mode %d"
apic_mem_readl(uint64_t addr, uint32_t val) "0x%"PRIx64" = 0x%08x"
apic_mem_writel(uint64_t addr, uint32_t val) "0x%"PRIx64" = 0x%08x"
# hw/intc/ioapic.c
ioapic_set_remote_irr(int n) "set remote irr for pin %d"
ioapic_clear_remote_irr(int n, int vector) "clear remote irr for pin %d vector %d"
ioapic_eoi_broadcast(int vector) "EOI broadcast for vector %d"
ioapic_mem_read(uint8_t addr, uint8_t regsel, uint8_t size, uint32_t val) "ioapic mem read addr 0x%"PRIx8" regsel: 0x%"PRIx8" size 0x%"PRIx8" retval 0x%"PRIx32
ioapic_mem_write(uint8_t addr, uint8_t regsel, uint8_t size, uint32_t val) "ioapic mem write addr 0x%"PRIx8" regsel: 0x%"PRIx8" size 0x%"PRIx8" val 0x%"PRIx32
ioapic_set_irq(int vector, int level) "vector: %d level: %d"
# hw/intc/slavio_intctl.c
slavio_intctl_mem_readl(uint32_t cpu, uint64_t addr, uint32_t ret) "read cpu %d reg 0x%"PRIx64" = 0x%x"
slavio_intctl_mem_writel(uint32_t cpu, uint64_t addr, uint32_t val) "write cpu %d reg 0x%"PRIx64" = 0x%x"
slavio_intctl_mem_writel_clear(uint32_t cpu, uint32_t val, uint32_t intreg_pending) "Cleared cpu %d irq mask 0x%x, curmask 0x%x"
slavio_intctl_mem_writel_set(uint32_t cpu, uint32_t val, uint32_t intreg_pending) "Set cpu %d irq mask 0x%x, curmask 0x%x"
slavio_intctlm_mem_readl(uint64_t addr, uint32_t ret) "read system reg 0x%"PRIx64" = 0x%x"
slavio_intctlm_mem_writel(uint64_t addr, uint32_t val) "write system reg 0x%"PRIx64" = 0x%x"
slavio_intctlm_mem_writel_enable(uint32_t val, uint32_t intregm_disabled) "Enabled master irq mask 0x%x, curmask 0x%x"
slavio_intctlm_mem_writel_disable(uint32_t val, uint32_t intregm_disabled) "Disabled master irq mask 0x%x, curmask 0x%x"
slavio_intctlm_mem_writel_target(uint32_t cpu) "Set master irq cpu %d"
slavio_check_interrupts(uint32_t pending, uint32_t intregm_disabled) "pending 0x%x disabled 0x%x"
slavio_set_irq(uint32_t target_cpu, int irq, uint32_t pil, int level) "Set cpu %d irq %d -> pil %d level %d"
slavio_set_timer_irq_cpu(int cpu, int level) "Set cpu %d local timer level %d"
# hw/intc/grlib_irqmp.c
grlib_irqmp_check_irqs(uint32_t pend, uint32_t force, uint32_t mask, uint32_t lvl1, uint32_t lvl2) "pend:0x%04x force:0x%04x mask:0x%04x lvl1:0x%04x lvl0:0x%04x"
grlib_irqmp_ack(int intno) "interrupt:%d"
grlib_irqmp_set_irq(int irq) "Raise CPU IRQ %d"
grlib_irqmp_readl_unknown(uint64_t addr) "addr 0x%"PRIx64
grlib_irqmp_writel_unknown(uint64_t addr, uint32_t value) "addr 0x%"PRIx64" value 0x%x"
# hw/intc/lm32_pic.c
lm32_pic_raise_irq(void) "Raise CPU interrupt"
lm32_pic_lower_irq(void) "Lower CPU interrupt"
lm32_pic_interrupt(int irq, int level) "Set IRQ%d %d"
lm32_pic_set_im(uint32_t im) "im 0x%08x"
lm32_pic_set_ip(uint32_t ip) "ip 0x%08x"
lm32_pic_get_im(uint32_t im) "im 0x%08x"
lm32_pic_get_ip(uint32_t ip) "ip 0x%08x"
# hw/intc/xics.c
xics_icp_check_ipi(int server, uint8_t mfrr) "CPU %d can take IPI mfrr=0x%x"
xics_icp_accept(uint32_t old_xirr, uint32_t new_xirr) "icp_accept: XIRR 0x%"PRIx32"->0x%"PRIx32
xics_icp_eoi(int server, uint32_t xirr, uint32_t new_xirr) "icp_eoi: server %d given XIRR 0x%"PRIx32" new XIRR 0x%"PRIx32
xics_icp_irq(int server, int nr, uint8_t priority) "cpu %d trying to deliver irq 0x%"PRIx32" priority 0x%x"
xics_icp_raise(uint32_t xirr, uint8_t pending_priority) "raising IRQ new XIRR=0x%x new pending priority=0x%x"
xics_ics_simple_set_irq_msi(int srcno, int nr) "set_irq_msi: srcno %d [irq 0x%x]"
xics_masked_pending(void) "set_irq_msi: masked pending"
xics_ics_simple_set_irq_lsi(int srcno, int nr) "set_irq_lsi: srcno %d [irq 0x%x]"
xics_ics_simple_write_xive(int nr, int srcno, int server, uint8_t priority) "ics_write_xive: irq 0x%x [src %d] server 0x%x prio 0x%x"
xics_ics_simple_reject(int nr, int srcno) "reject irq 0x%x [src %d]"
xics_ics_simple_eoi(int nr) "ics_eoi: irq 0x%x"
# hw/intc/s390_flic_kvm.c
flic_create_device(int err) "flic: create device failed %d"
flic_no_device_api(int err) "flic: no Device Contral API support %d"
flic_reset_failed(int err) "flic: reset failed %d"
# hw/intc/s390_flic.c
qemu_s390_airq_suppressed(uint8_t type, uint8_t isc) "flic: adapter I/O interrupt suppressed (type 0x%x isc 0x%x)"
qemu_s390_suppress_airq(uint8_t isc, const char *from, const char *to) "flic: for isc 0x%x, suppress airq by modifying ais mode from %s to %s"
# hw/intc/aspeed_vic.c
aspeed_vic_set_irq(int irq, int level) "Enabling IRQ %d: %d"
aspeed_vic_update_fiq(int flags) "Raising FIQ: %d"
aspeed_vic_update_irq(int flags) "Raising IRQ: %d"
aspeed_vic_read(uint64_t offset, unsigned size, uint32_t value) "From 0x%" PRIx64 " of size %u: 0x%" PRIx32
aspeed_vic_write(uint64_t offset, unsigned size, uint32_t data) "To 0x%" PRIx64 " of size %u: 0x%" PRIx32
# hw/intc/arm_gic.c
gic_enable_irq(int irq) "irq %d enabled"
gic_disable_irq(int irq) "irq %d disabled"
gic_set_irq(int irq, int level, int cpumask, int target) "irq %d level %d cpumask 0x%x target 0x%x"
gic_update_bestirq(int cpu, int irq, int prio, int priority_mask, int running_priority) "cpu %d irq %d priority %d cpu priority mask %d cpu running priority %d"
gic_update_set_irq(int cpu, const char *name, int level) "cpu[%d]: %s = %d"
gic_acknowledge_irq(int cpu, int irq) "cpu %d acknowledged irq %d"
# hw/intc/arm_gicv3_cpuif.c
gicv3_icc_pmr_read(uint32_t cpu, uint64_t val) "GICv3 ICC_PMR read cpu 0x%x value 0x%" PRIx64
gicv3_icc_pmr_write(uint32_t cpu, uint64_t val) "GICv3 ICC_PMR write cpu 0x%x value 0x%" PRIx64
gicv3_icc_bpr_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICC_BPR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icc_bpr_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICC_BPR%d write cpu 0x%x value 0x%" PRIx64
gicv3_icc_ap_read(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICC_AP%dR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icc_ap_write(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICC_AP%dR%d write cpu 0x%x value 0x%" PRIx64
gicv3_icc_igrpen_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICC_IGRPEN%d read cpu 0x%x value 0x%" PRIx64
gicv3_icc_igrpen_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICC_IGRPEN%d write cpu 0x%x value 0x%" PRIx64
gicv3_icc_igrpen1_el3_read(uint32_t cpu, uint64_t val) "GICv3 ICC_IGRPEN1_EL3 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_igrpen1_el3_write(uint32_t cpu, uint64_t val) "GICv3 ICC_IGRPEN1_EL3 write cpu 0x%x value 0x%" PRIx64
gicv3_icc_ctlr_read(uint32_t cpu, uint64_t val) "GICv3 ICC_CTLR read cpu 0x%x value 0x%" PRIx64
gicv3_icc_ctlr_write(uint32_t cpu, uint64_t val) "GICv3 ICC_CTLR write cpu 0x%x value 0x%" PRIx64
gicv3_icc_ctlr_el3_read(uint32_t cpu, uint64_t val) "GICv3 ICC_CTLR_EL3 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_ctlr_el3_write(uint32_t cpu, uint64_t val) "GICv3 ICC_CTLR_EL3 write cpu 0x%x value 0x%" PRIx64
gicv3_cpuif_update(uint32_t cpuid, int irq, int grp, int prio) "GICv3 CPU i/f 0x%x HPPI update: irq %d group %d prio %d"
gicv3_cpuif_set_irqs(uint32_t cpuid, int fiqlevel, int irqlevel) "GICv3 CPU i/f 0x%x HPPI update: setting FIQ %d IRQ %d"
gicv3_icc_generate_sgi(uint32_t cpuid, int irq, int irm, uint32_t aff, uint32_t targetlist) "GICv3 CPU i/f 0x%x generating SGI %d IRM %d target affinity 0x%xxx targetlist 0x%x"
gicv3_icc_iar0_read(uint32_t cpu, uint64_t val) "GICv3 ICC_IAR0 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_iar1_read(uint32_t cpu, uint64_t val) "GICv3 ICC_IAR1 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_eoir_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICC_EOIR%d write cpu 0x%x value 0x%" PRIx64
gicv3_icc_hppir0_read(uint32_t cpu, uint64_t val) "GICv3 ICC_HPPIR0 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_hppir1_read(uint32_t cpu, uint64_t val) "GICv3 ICC_HPPIR1 read cpu 0x%x value 0x%" PRIx64
gicv3_icc_dir_write(uint32_t cpu, uint64_t val) "GICv3 ICC_DIR write cpu 0x%x value 0x%" PRIx64
gicv3_icc_rpr_read(uint32_t cpu, uint64_t val) "GICv3 ICC_RPR read cpu 0x%x value 0x%" PRIx64
gicv3_ich_ap_read(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICH_AP%dR%d read cpu 0x%x value 0x%" PRIx64
gicv3_ich_ap_write(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICH_AP%dR%d write cpu 0x%x value 0x%" PRIx64
gicv3_ich_hcr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_HCR_EL2 read cpu 0x%x value 0x%" PRIx64
gicv3_ich_hcr_write(uint32_t cpu, uint64_t val) "GICv3 ICH_HCR_EL2 write cpu 0x%x value 0x%" PRIx64
gicv3_ich_vmcr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_VMCR_EL2 read cpu 0x%x value 0x%" PRIx64
gicv3_ich_vmcr_write(uint32_t cpu, uint64_t val) "GICv3 ICH_VMCR_EL2 write cpu 0x%x value 0x%" PRIx64
gicv3_ich_lr_read(int regno, uint32_t cpu, uint64_t val) "GICv3 ICH_LR%d_EL2 read cpu 0x%x value 0x%" PRIx64
gicv3_ich_lr32_read(int regno, uint32_t cpu, uint32_t val) "GICv3 ICH_LR%d read cpu 0x%x value 0x%" PRIx32
gicv3_ich_lrc_read(int regno, uint32_t cpu, uint32_t val) "GICv3 ICH_LRC%d read cpu 0x%x value 0x%" PRIx32
gicv3_ich_lr_write(int regno, uint32_t cpu, uint64_t val) "GICv3 ICH_LR%d_EL2 write cpu 0x%x value 0x%" PRIx64
gicv3_ich_lr32_write(int regno, uint32_t cpu, uint32_t val) "GICv3 ICH_LR%d write cpu 0x%x value 0x%" PRIx32
gicv3_ich_lrc_write(int regno, uint32_t cpu, uint32_t val) "GICv3 ICH_LRC%d write cpu 0x%x value 0x%" PRIx32
gicv3_ich_vtr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_VTR read cpu 0x%x value 0x%" PRIx64
gicv3_ich_misr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_MISR read cpu 0x%x value 0x%" PRIx64
gicv3_ich_eisr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_EISR read cpu 0x%x value 0x%" PRIx64
gicv3_ich_elrsr_read(uint32_t cpu, uint64_t val) "GICv3 ICH_ELRSR read cpu 0x%x value 0x%" PRIx64
gicv3_icv_ap_read(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICV_AP%dR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icv_ap_write(int grp, int regno, uint32_t cpu, uint64_t val) "GICv3 ICV_AP%dR%d write cpu 0x%x value 0x%" PRIx64
gicv3_icv_bpr_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_BPR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icv_bpr_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_BPR%d write cpu 0x%x value 0x%" PRIx64
gicv3_icv_pmr_read(uint32_t cpu, uint64_t val) "GICv3 ICV_PMR read cpu 0x%x value 0x%" PRIx64
gicv3_icv_pmr_write(uint32_t cpu, uint64_t val) "GICv3 ICV_PMR write cpu 0x%x value 0x%" PRIx64
gicv3_icv_igrpen_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_IGRPEN%d read cpu 0x%x value 0x%" PRIx64
gicv3_icv_igrpen_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_IGRPEN%d write cpu 0x%x value 0x%" PRIx64
gicv3_icv_ctlr_read(uint32_t cpu, uint64_t val) "GICv3 ICV_CTLR read cpu 0x%x value 0x%" PRIx64
gicv3_icv_ctlr_write(uint32_t cpu, uint64_t val) "GICv3 ICV_CTLR write cpu 0x%x value 0x%" PRIx64
gicv3_icv_rpr_read(uint32_t cpu, uint64_t val) "GICv3 ICV_RPR read cpu 0x%x value 0x%" PRIx64
gicv3_icv_hppir_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_HPPIR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icv_dir_write(uint32_t cpu, uint64_t val) "GICv3 ICV_DIR write cpu 0x%x value 0x%" PRIx64
gicv3_icv_iar_read(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_IAR%d read cpu 0x%x value 0x%" PRIx64
gicv3_icv_eoir_write(int grp, uint32_t cpu, uint64_t val) "GICv3 ICV_EOIR%d write cpu 0x%x value 0x%" PRIx64
gicv3_cpuif_virt_update(uint32_t cpuid, int idx) "GICv3 CPU i/f 0x%x virt HPPI update LR index %d"
gicv3_cpuif_virt_set_irqs(uint32_t cpuid, int fiqlevel, int irqlevel, int maintlevel) "GICv3 CPU i/f 0x%x virt HPPI update: setting FIQ %d IRQ %d maintenance-irq %d"
# hw/intc/arm_gicv3_dist.c
gicv3_dist_read(uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 distributor read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d"
gicv3_dist_badread(uint64_t offset, unsigned size, bool secure) "GICv3 distributor read: offset 0x%" PRIx64 " size %u secure %d: error"
gicv3_dist_write(uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 distributor write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d"
gicv3_dist_badwrite(uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 distributor write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d: error"
gicv3_dist_set_irq(int irq, int level) "GICv3 distributor interrupt %d level changed to %d"
# hw/intc/arm_gicv3_redist.c
gicv3_redist_read(uint32_t cpu, uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 redistributor 0x%x read: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d"
gicv3_redist_badread(uint32_t cpu, uint64_t offset, unsigned size, bool secure) "GICv3 redistributor 0x%x read: offset 0x%" PRIx64 " size %u secure %d: error"
gicv3_redist_write(uint32_t cpu, uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 redistributor 0x%x write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d"
gicv3_redist_badwrite(uint32_t cpu, uint64_t offset, uint64_t data, unsigned size, bool secure) "GICv3 redistributor 0x%x write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u secure %d: error"
gicv3_redist_set_irq(uint32_t cpu, int irq, int level) "GICv3 redistributor 0x%x interrupt %d level changed to %d"
gicv3_redist_send_sgi(uint32_t cpu, int irq) "GICv3 redistributor 0x%x pending SGI %d"
# hw/intc/armv7m_nvic.c
nvic_recompute_state(int vectpending, int vectpending_prio, int exception_prio) "NVIC state recomputed: vectpending %d vectpending_prio %d exception_prio %d"
nvic_recompute_state_secure(int vectpending, bool vectpending_is_s_banked, int vectpending_prio, int exception_prio) "NVIC state recomputed: vectpending %d is_s_banked %d vectpending_prio %d exception_prio %d"
nvic_set_prio(int irq, bool secure, uint8_t prio) "NVIC set irq %d secure-bank %d priority %d"
nvic_irq_update(int vectpending, int pendprio, int exception_prio, int level) "NVIC vectpending %d pending prio %d exception_prio %d: setting irq line to %d"
nvic_escalate_prio(int irq, int irqprio, int runprio) "NVIC escalating irq %d to HardFault: insufficient priority %d >= %d"
nvic_escalate_disabled(int irq) "NVIC escalating irq %d to HardFault: disabled"
nvic_set_pending(int irq, bool secure, bool derived, int en, int prio) "NVIC set pending irq %d secure-bank %d derived %d (enabled: %d priority %d)"
nvic_clear_pending(int irq, bool secure, int en, int prio) "NVIC clear pending irq %d secure-bank %d (enabled: %d priority %d)"
nvic_set_pending_level(int irq) "NVIC set pending: irq %d higher prio than vectpending: setting irq line to 1"
nvic_acknowledge_irq(int irq, int prio) "NVIC acknowledge IRQ: %d now active (prio %d)"
nvic_get_pending_irq_info(int irq, bool secure) "NVIC next IRQ %d: targets_secure: %d"
nvic_complete_irq(int irq, bool secure) "NVIC complete IRQ %d (secure %d)"
nvic_set_irq_level(int irq, int level) "NVIC external irq %d level set to %d"
nvic_sysreg_read(uint64_t addr, uint32_t value, unsigned size) "NVIC sysreg read addr 0x%" PRIx64 " data 0x%" PRIx32 " size %u"
nvic_sysreg_write(uint64_t addr, uint32_t value, unsigned size) "NVIC sysreg write addr 0x%" PRIx64 " data 0x%" PRIx32 " size %u"