diff options
| -rw-r--r-- | hw/ppc/spapr.c | 10 | ||||
| -rw-r--r-- | hw/ppc/spapr_hcall.c | 11 | ||||
| -rw-r--r-- | hw/ppc/spapr_irq.c | 179 | ||||
| -rw-r--r-- | include/hw/ppc/spapr_irq.h | 1 |
4 files changed, 198 insertions, 3 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 59faeccf4b..83081defde 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2686,11 +2686,11 @@ static void spapr_machine_init(MachineState *machine) spapr_ovec_set(spapr->ov5, OV5_DRMEM_V2); /* advertise XIVE on POWER9 machines */ - if (spapr->irq->ov5 & SPAPR_OV5_XIVE_EXPLOIT) { + if (spapr->irq->ov5 & (SPAPR_OV5_XIVE_EXPLOIT | SPAPR_OV5_XIVE_BOTH)) { if (ppc_type_check_compat(machine->cpu_type, CPU_POWERPC_LOGICAL_3_00, 0, spapr->max_compat_pvr)) { spapr_ovec_set(spapr->ov5, OV5_XIVE_EXPLOIT); - } else { + } else if (spapr->irq->ov5 & SPAPR_OV5_XIVE_EXPLOIT) { error_report("XIVE-only machines require a POWER9 CPU"); exit(1); } @@ -3116,6 +3116,8 @@ static char *spapr_get_ic_mode(Object *obj, Error **errp) return g_strdup("xics"); } else if (spapr->irq == &spapr_irq_xive) { return g_strdup("xive"); + } else if (spapr->irq == &spapr_irq_dual) { + return g_strdup("dual"); } g_assert_not_reached(); } @@ -3129,6 +3131,8 @@ static void spapr_set_ic_mode(Object *obj, const char *value, Error **errp) spapr->irq = &spapr_irq_xics; } else if (strcmp(value, "xive") == 0) { spapr->irq = &spapr_irq_xive; + } else if (strcmp(value, "dual") == 0) { + spapr->irq = &spapr_irq_dual; } else { error_setg(errp, "Bad value for \"ic-mode\" property"); } @@ -3177,7 +3181,7 @@ static void spapr_instance_init(Object *obj) object_property_add_str(obj, "ic-mode", spapr_get_ic_mode, spapr_set_ic_mode, NULL); object_property_set_description(obj, "ic-mode", - "Specifies the interrupt controller mode (xics, xive)", + "Specifies the interrupt controller mode (xics, xive, dual)", NULL); } diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index 1ae3e6ff5e..17bcaa3822 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -1654,6 +1654,17 @@ static target_ulong h_client_architecture_support(PowerPCCPU *cpu, (spapr_h_cas_compose_response(spapr, args[1], args[2], ov5_updates) != 0); } + + /* + * Generate a machine reset when we have an update of the + * interrupt mode. Only required when the machine supports both + * modes. + */ + if (!spapr->cas_reboot) { + spapr->cas_reboot = spapr_ovec_test(ov5_updates, OV5_XIVE_EXPLOIT) + && spapr->irq->ov5 & SPAPR_OV5_XIVE_BOTH; + } + spapr_ovec_cleanup(ov5_updates); if (spapr->cas_reboot) { diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c index d23914887a..d110b8cdee 100644 --- a/hw/ppc/spapr_irq.c +++ b/hw/ppc/spapr_irq.c @@ -230,6 +230,11 @@ static void spapr_irq_set_irq_xics(void *opaque, int srcno, int 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) @@ -247,6 +252,7 @@ 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, }; @@ -404,6 +410,179 @@ sPAPRIrq spapr_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) +{ + 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 +}; + +/* * sPAPR IRQ frontend routines for devices */ void spapr_irq_init(sPAPRMachineState *spapr, Error **errp) diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h index 283bb5002c..14b02c3aca 100644 --- a/include/hw/ppc/spapr_irq.h +++ b/include/hw/ppc/spapr_irq.h @@ -52,6 +52,7 @@ typedef struct sPAPRIrq { extern sPAPRIrq spapr_irq_xics; extern sPAPRIrq spapr_irq_xics_legacy; extern sPAPRIrq spapr_irq_xive; +extern sPAPRIrq spapr_irq_dual; void spapr_irq_init(sPAPRMachineState *spapr, Error **errp); int spapr_irq_claim(sPAPRMachineState *spapr, int irq, bool lsi, Error **errp); |