diff options
Diffstat (limited to 'hw/ppc/spapr_irq.c')
| -rw-r--r-- | hw/ppc/spapr_irq.c | 270 |
1 files changed, 255 insertions, 15 deletions
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c index 7b3b5afec2..5fce72fe0f 100644 --- a/hw/ppc/spapr_irq.c +++ b/hw/ppc/spapr_irq.c @@ -171,7 +171,7 @@ static qemu_irq spapr_qirq_xics(sPAPRMachineState *spapr, int irq) uint32_t srcno = irq - ics->offset; if (ics_valid_irq(ics, irq)) { - return ics->qirqs[srcno]; + return spapr->qirqs[srcno]; } return NULL; @@ -184,16 +184,26 @@ static void spapr_irq_print_info_xics(sPAPRMachineState *spapr, Monitor *mon) CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); - icp_pic_print_info(ICP(cpu->intc), mon); + icp_pic_print_info(cpu->icp, mon); } ics_pic_print_info(spapr->ics, mon); } -static Object *spapr_irq_cpu_intc_create_xics(sPAPRMachineState *spapr, - Object *cpu, Error **errp) +static void spapr_irq_cpu_intc_create_xics(sPAPRMachineState *spapr, + PowerPCCPU *cpu, Error **errp) { - return icp_create(cpu, spapr->icp_type, XICS_FABRIC(spapr), errp); + Error *local_err = NULL; + Object *obj; + + obj = icp_create(OBJECT(cpu), spapr->icp_type, XICS_FABRIC(spapr), + &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + cpu->icp = ICP(obj); } static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id) @@ -202,12 +212,29 @@ static int spapr_irq_post_load_xics(sPAPRMachineState *spapr, int version_id) CPUState *cs; CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); - icp_resend(ICP(cpu->intc)); + icp_resend(cpu->icp); } } return 0; } +static void spapr_irq_set_irq_xics(void *opaque, int srcno, int val) +{ + sPAPRMachineState *spapr = opaque; + MachineState *machine = MACHINE(opaque); + + if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) { + ics_kvm_set_irq(spapr->ics, srcno, val); + } else { + ics_simple_set_irq(spapr->ics, srcno, val); + } +} + +static void spapr_irq_reset_xics(sPAPRMachineState *spapr, Error **errp) +{ + /* TODO: create the KVM XICS device */ +} + #define SPAPR_IRQ_XICS_NR_IRQS 0x1000 #define SPAPR_IRQ_XICS_NR_MSIS \ (XICS_IRQ_BASE + SPAPR_IRQ_XICS_NR_IRQS - SPAPR_IRQ_MSI) @@ -225,6 +252,8 @@ sPAPRIrq spapr_irq_xics = { .dt_populate = spapr_dt_xics, .cpu_intc_create = spapr_irq_cpu_intc_create_xics, .post_load = spapr_irq_post_load_xics, + .reset = spapr_irq_reset_xics, + .set_irq = spapr_irq_set_irq_xics, }; /* @@ -284,7 +313,16 @@ static void spapr_irq_free_xive(sPAPRMachineState *spapr, int irq, int num) static qemu_irq spapr_qirq_xive(sPAPRMachineState *spapr, int irq) { - return spapr_xive_qirq(spapr->xive, irq); + sPAPRXive *xive = spapr->xive; + + if (irq >= xive->nr_irqs) { + return NULL; + } + + /* The sPAPR machine/device should have claimed the IRQ before */ + assert(xive_eas_is_valid(&xive->eat[irq])); + + return spapr->qirqs[irq]; } static void spapr_irq_print_info_xive(sPAPRMachineState *spapr, @@ -295,23 +333,31 @@ static void spapr_irq_print_info_xive(sPAPRMachineState *spapr, CPU_FOREACH(cs) { PowerPCCPU *cpu = POWERPC_CPU(cs); - xive_tctx_pic_print_info(XIVE_TCTX(cpu->intc), mon); + xive_tctx_pic_print_info(cpu->tctx, mon); } spapr_xive_pic_print_info(spapr->xive, mon); } -static Object *spapr_irq_cpu_intc_create_xive(sPAPRMachineState *spapr, - Object *cpu, Error **errp) +static void spapr_irq_cpu_intc_create_xive(sPAPRMachineState *spapr, + PowerPCCPU *cpu, Error **errp) { - Object *obj = xive_tctx_create(cpu, XIVE_ROUTER(spapr->xive), errp); + Error *local_err = NULL; + Object *obj; + + obj = xive_tctx_create(OBJECT(cpu), XIVE_ROUTER(spapr->xive), &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + cpu->tctx = XIVE_TCTX(obj); /* * (TCG) Early setting the OS CAM line for hotplugged CPUs as they - * don't benificiate from the reset of the XIVE IRQ backend + * don't beneficiate from the reset of the XIVE IRQ backend */ - spapr_xive_set_tctx_os_cam(XIVE_TCTX(obj)); - return obj; + spapr_xive_set_tctx_os_cam(cpu->tctx); } static int spapr_irq_post_load_xive(sPAPRMachineState *spapr, int version_id) @@ -327,8 +373,18 @@ static void spapr_irq_reset_xive(sPAPRMachineState *spapr, Error **errp) PowerPCCPU *cpu = POWERPC_CPU(cs); /* (TCG) Set the OS CAM line of the thread interrupt context. */ - spapr_xive_set_tctx_os_cam(XIVE_TCTX(cpu->intc)); + spapr_xive_set_tctx_os_cam(cpu->tctx); } + + /* Activate the XIVE MMIOs */ + spapr_xive_mmio_set_enabled(spapr->xive, true); +} + +static void spapr_irq_set_irq_xive(void *opaque, int srcno, int val) +{ + sPAPRMachineState *spapr = opaque; + + xive_source_set_irq(&spapr->xive->source, srcno, val); } /* @@ -353,6 +409,186 @@ sPAPRIrq spapr_irq_xive = { .cpu_intc_create = spapr_irq_cpu_intc_create_xive, .post_load = spapr_irq_post_load_xive, .reset = spapr_irq_reset_xive, + .set_irq = spapr_irq_set_irq_xive, +}; + +/* + * Dual XIVE and XICS IRQ backend. + * + * Both interrupt mode, XIVE and XICS, objects are created but the + * machine starts in legacy interrupt mode (XICS). It can be changed + * by the CAS negotiation process and, in that case, the new mode is + * activated after an extra machine reset. + */ + +/* + * Returns the sPAPR IRQ backend negotiated by CAS. XICS is the + * default. + */ +static sPAPRIrq *spapr_irq_current(sPAPRMachineState *spapr) +{ + return spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT) ? + &spapr_irq_xive : &spapr_irq_xics; +} + +static void spapr_irq_init_dual(sPAPRMachineState *spapr, Error **errp) +{ + MachineState *machine = MACHINE(spapr); + Error *local_err = NULL; + + if (kvm_enabled() && machine_kernel_irqchip_allowed(machine)) { + error_setg(errp, "No KVM support for the 'dual' machine"); + return; + } + + spapr_irq_xics.init(spapr, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + /* + * Align the XICS and the XIVE IRQ number space under QEMU. + * + * However, the XICS KVM device still considers that the IRQ + * numbers should start at XICS_IRQ_BASE (0x1000). Either we + * should introduce a KVM device ioctl to set the offset or ignore + * the lower 4K numbers when using the get/set ioctl of the XICS + * KVM device. The second option seems the least intrusive. + */ + spapr->ics->offset = 0; + + spapr_irq_xive.init(spapr, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } +} + +static int spapr_irq_claim_dual(sPAPRMachineState *spapr, int irq, bool lsi, + Error **errp) +{ + Error *local_err = NULL; + int ret; + + ret = spapr_irq_xics.claim(spapr, irq, lsi, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return ret; + } + + ret = spapr_irq_xive.claim(spapr, irq, lsi, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return ret; + } + + return ret; +} + +static void spapr_irq_free_dual(sPAPRMachineState *spapr, int irq, int num) +{ + spapr_irq_xics.free(spapr, irq, num); + spapr_irq_xive.free(spapr, irq, num); +} + +static qemu_irq spapr_qirq_dual(sPAPRMachineState *spapr, int irq) +{ + sPAPRXive *xive = spapr->xive; + ICSState *ics = spapr->ics; + + if (irq >= spapr->irq->nr_irqs) { + return NULL; + } + + /* + * The IRQ number should have been claimed under both interrupt + * controllers. + */ + assert(!ICS_IRQ_FREE(ics, irq - ics->offset)); + assert(xive_eas_is_valid(&xive->eat[irq])); + + return spapr->qirqs[irq]; +} + +static void spapr_irq_print_info_dual(sPAPRMachineState *spapr, Monitor *mon) +{ + spapr_irq_current(spapr)->print_info(spapr, mon); +} + +static void spapr_irq_dt_populate_dual(sPAPRMachineState *spapr, + uint32_t nr_servers, void *fdt, + uint32_t phandle) +{ + spapr_irq_current(spapr)->dt_populate(spapr, nr_servers, fdt, phandle); +} + +static void spapr_irq_cpu_intc_create_dual(sPAPRMachineState *spapr, + PowerPCCPU *cpu, Error **errp) +{ + Error *local_err = NULL; + + spapr_irq_xive.cpu_intc_create(spapr, cpu, &local_err); + if (local_err) { + error_propagate(errp, local_err); + return; + } + + spapr_irq_xics.cpu_intc_create(spapr, cpu, errp); +} + +static int spapr_irq_post_load_dual(sPAPRMachineState *spapr, int version_id) +{ + /* + * Force a reset of the XIVE backend after migration. The machine + * defaults to XICS at startup. + */ + if (spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) { + spapr_irq_xive.reset(spapr, &error_fatal); + } + + return spapr_irq_current(spapr)->post_load(spapr, version_id); +} + +static void spapr_irq_reset_dual(sPAPRMachineState *spapr, Error **errp) +{ + /* + * Deactivate the XIVE MMIOs. The XIVE backend will reenable them + * if selected. + */ + spapr_xive_mmio_set_enabled(spapr->xive, false); + + spapr_irq_current(spapr)->reset(spapr, errp); +} + +static void spapr_irq_set_irq_dual(void *opaque, int srcno, int val) +{ + sPAPRMachineState *spapr = opaque; + + spapr_irq_current(spapr)->set_irq(spapr, srcno, val); +} + +/* + * Define values in sync with the XIVE and XICS backend + */ +#define SPAPR_IRQ_DUAL_NR_IRQS 0x2000 +#define SPAPR_IRQ_DUAL_NR_MSIS (SPAPR_IRQ_DUAL_NR_IRQS - SPAPR_IRQ_MSI) + +sPAPRIrq spapr_irq_dual = { + .nr_irqs = SPAPR_IRQ_DUAL_NR_IRQS, + .nr_msis = SPAPR_IRQ_DUAL_NR_MSIS, + .ov5 = SPAPR_OV5_XIVE_BOTH, + + .init = spapr_irq_init_dual, + .claim = spapr_irq_claim_dual, + .free = spapr_irq_free_dual, + .qirq = spapr_qirq_dual, + .print_info = spapr_irq_print_info_dual, + .dt_populate = spapr_irq_dt_populate_dual, + .cpu_intc_create = spapr_irq_cpu_intc_create_dual, + .post_load = spapr_irq_post_load_dual, + .reset = spapr_irq_reset_dual, + .set_irq = spapr_irq_set_irq_dual }; /* @@ -366,6 +602,9 @@ void spapr_irq_init(sPAPRMachineState *spapr, Error **errp) } spapr->irq->init(spapr, errp); + + spapr->qirqs = qemu_allocate_irqs(spapr->irq->set_irq, spapr, + spapr->irq->nr_irqs); } int spapr_irq_claim(sPAPRMachineState *spapr, int irq, bool lsi, Error **errp) @@ -465,4 +704,5 @@ sPAPRIrq spapr_irq_xics_legacy = { .dt_populate = spapr_dt_xics, .cpu_intc_create = spapr_irq_cpu_intc_create_xics, .post_load = spapr_irq_post_load_xics, + .set_irq = spapr_irq_set_irq_xics, }; |