| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Benjamin Herrenschmidt | 2694 | 80.68% | 5 | 20.00% |
| Cédric Le Goater | 552 | 16.53% | 7 | 28.00% |
| Greg Kurz | 27 | 0.81% | 1 | 4.00% |
| Paul Mackerras | 23 | 0.69% | 1 | 4.00% |
| Daniel Klamt | 12 | 0.36% | 1 | 4.00% |
| Alexey Kardashevskiy | 8 | 0.24% | 1 | 4.00% |
| Michael Ellerman | 7 | 0.21% | 2 | 8.00% |
| Haren Myneni | 5 | 0.15% | 1 | 4.00% |
| Kees Cook | 2 | 0.06% | 1 | 4.00% |
| Thomas Gleixner | 2 | 0.06% | 1 | 4.00% |
| Alexey Dobriyan | 2 | 0.06% | 1 | 4.00% |
| Russell Currey | 2 | 0.06% | 1 | 4.00% |
| Breno Leitão | 2 | 0.06% | 1 | 4.00% |
| Rob Herring | 1 | 0.03% | 1 | 4.00% |
| Total | 3339 | 25 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright 2016,2017 IBM Corporation. */ #define pr_fmt(fmt) "xive: " fmt #include <linux/types.h> #include <linux/irq.h> #include <linux/debugfs.h> #include <linux/smp.h> #include <linux/interrupt.h> #include <linux/seq_file.h> #include <linux/init.h> #include <linux/of.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/cpumask.h> #include <linux/mm.h> #include <linux/kmemleak.h> #include <asm/machdep.h> #include <asm/prom.h> #include <asm/io.h> #include <asm/smp.h> #include <asm/irq.h> #include <asm/errno.h> #include <asm/xive.h> #include <asm/xive-regs.h> #include <asm/opal.h> #include <asm/kvm_ppc.h> #include "xive-internal.h" static u32 xive_provision_size; static u32 *xive_provision_chips; static u32 xive_provision_chip_count; static u32 xive_queue_shift; static u32 xive_pool_vps = XIVE_INVALID_VP; static struct kmem_cache *xive_provision_cache; static bool xive_has_single_esc; int xive_native_populate_irq_data(u32 hw_irq, struct xive_irq_data *data) { __be64 flags, eoi_page, trig_page; __be32 esb_shift, src_chip; u64 opal_flags; s64 rc; memset(data, 0, sizeof(*data)); rc = opal_xive_get_irq_info(hw_irq, &flags, &eoi_page, &trig_page, &esb_shift, &src_chip); if (rc) { pr_err("opal_xive_get_irq_info(0x%x) returned %lld\n", hw_irq, rc); return -EINVAL; } opal_flags = be64_to_cpu(flags); if (opal_flags & OPAL_XIVE_IRQ_STORE_EOI) data->flags |= XIVE_IRQ_FLAG_STORE_EOI; if (opal_flags & OPAL_XIVE_IRQ_LSI) data->flags |= XIVE_IRQ_FLAG_LSI; if (opal_flags & OPAL_XIVE_IRQ_SHIFT_BUG) data->flags |= XIVE_IRQ_FLAG_SHIFT_BUG; if (opal_flags & OPAL_XIVE_IRQ_MASK_VIA_FW) data->flags |= XIVE_IRQ_FLAG_MASK_FW; if (opal_flags & OPAL_XIVE_IRQ_EOI_VIA_FW) data->flags |= XIVE_IRQ_FLAG_EOI_FW; data->eoi_page = be64_to_cpu(eoi_page); data->trig_page = be64_to_cpu(trig_page); data->esb_shift = be32_to_cpu(esb_shift); data->src_chip = be32_to_cpu(src_chip); data->eoi_mmio = ioremap(data->eoi_page, 1u << data->esb_shift); if (!data->eoi_mmio) { pr_err("Failed to map EOI page for irq 0x%x\n", hw_irq); return -ENOMEM; } data->hw_irq = hw_irq; if (!data->trig_page) return 0; if (data->trig_page == data->eoi_page) { data->trig_mmio = data->eoi_mmio; return 0; } data->trig_mmio = ioremap(data->trig_page, 1u << data->esb_shift); if (!data->trig_mmio) { pr_err("Failed to map trigger page for irq 0x%x\n", hw_irq); return -ENOMEM; } return 0; } EXPORT_SYMBOL_GPL(xive_native_populate_irq_data); int xive_native_configure_irq(u32 hw_irq, u32 target, u8 prio, u32 sw_irq) { s64 rc; for (;;) { rc = opal_xive_set_irq_config(hw_irq, target, prio, sw_irq); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } return rc == 0 ? 0 : -ENXIO; } EXPORT_SYMBOL_GPL(xive_native_configure_irq); static int xive_native_get_irq_config(u32 hw_irq, u32 *target, u8 *prio, u32 *sw_irq) { s64 rc; __be64 vp; __be32 lirq; rc = opal_xive_get_irq_config(hw_irq, &vp, prio, &lirq); *target = be64_to_cpu(vp); *sw_irq = be32_to_cpu(lirq); return rc == 0 ? 0 : -ENXIO; } /* This can be called multiple time to change a queue configuration */ int xive_native_configure_queue(u32 vp_id, struct xive_q *q, u8 prio, __be32 *qpage, u32 order, bool can_escalate) { s64 rc = 0; __be64 qeoi_page_be; __be32 esc_irq_be; u64 flags, qpage_phys; /* If there's an actual queue page, clean it */ if (order) { if (WARN_ON(!qpage)) return -EINVAL; qpage_phys = __pa(qpage); } else qpage_phys = 0; /* Initialize the rest of the fields */ q->msk = order ? ((1u << (order - 2)) - 1) : 0; q->idx = 0; q->toggle = 0; rc = opal_xive_get_queue_info(vp_id, prio, NULL, NULL, &qeoi_page_be, &esc_irq_be, NULL); if (rc) { pr_err("Error %lld getting queue info prio %d\n", rc, prio); rc = -EIO; goto fail; } q->eoi_phys = be64_to_cpu(qeoi_page_be); /* Default flags */ flags = OPAL_XIVE_EQ_ALWAYS_NOTIFY | OPAL_XIVE_EQ_ENABLED; /* Escalation needed ? */ if (can_escalate) { q->esc_irq = be32_to_cpu(esc_irq_be); flags |= OPAL_XIVE_EQ_ESCALATE; } /* Configure and enable the queue in HW */ for (;;) { rc = opal_xive_set_queue_info(vp_id, prio, qpage_phys, order, flags); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } if (rc) { pr_err("Error %lld setting queue for prio %d\n", rc, prio); rc = -EIO; } else { /* * KVM code requires all of the above to be visible before * q->qpage is set due to how it manages IPI EOIs */ wmb(); q->qpage = qpage; } fail: return rc; } EXPORT_SYMBOL_GPL(xive_native_configure_queue); static void __xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio) { s64 rc; /* Disable the queue in HW */ for (;;) { rc = opal_xive_set_queue_info(vp_id, prio, 0, 0, 0); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } if (rc) pr_err("Error %lld disabling queue for prio %d\n", rc, prio); } void xive_native_disable_queue(u32 vp_id, struct xive_q *q, u8 prio) { __xive_native_disable_queue(vp_id, q, prio); } EXPORT_SYMBOL_GPL(xive_native_disable_queue); static int xive_native_setup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio) { struct xive_q *q = &xc->queue[prio]; __be32 *qpage; qpage = xive_queue_page_alloc(cpu, xive_queue_shift); if (IS_ERR(qpage)) return PTR_ERR(qpage); return xive_native_configure_queue(get_hard_smp_processor_id(cpu), q, prio, qpage, xive_queue_shift, false); } static void xive_native_cleanup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio) { struct xive_q *q = &xc->queue[prio]; unsigned int alloc_order; /* * We use the variant with no iounmap as this is called on exec * from an IPI and iounmap isn't safe */ __xive_native_disable_queue(get_hard_smp_processor_id(cpu), q, prio); alloc_order = xive_alloc_order(xive_queue_shift); free_pages((unsigned long)q->qpage, alloc_order); q->qpage = NULL; } static bool xive_native_match(struct device_node *node) { return of_device_is_compatible(node, "ibm,opal-xive-vc"); } static s64 opal_xive_allocate_irq(u32 chip_id) { s64 irq = opal_xive_allocate_irq_raw(chip_id); /* * Old versions of skiboot can incorrectly return 0xffffffff to * indicate no space, fix it up here. */ return irq == 0xffffffff ? OPAL_RESOURCE : irq; } #ifdef CONFIG_SMP static int xive_native_get_ipi(unsigned int cpu, struct xive_cpu *xc) { s64 irq; /* Allocate an IPI and populate info about it */ for (;;) { irq = opal_xive_allocate_irq(xc->chip_id); if (irq == OPAL_BUSY) { msleep(OPAL_BUSY_DELAY_MS); continue; } if (irq < 0) { pr_err("Failed to allocate IPI on CPU %d\n", cpu); return -ENXIO; } xc->hw_ipi = irq; break; } return 0; } #endif /* CONFIG_SMP */ u32 xive_native_alloc_irq_on_chip(u32 chip_id) { s64 rc; for (;;) { rc = opal_xive_allocate_irq(chip_id); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } if (rc < 0) return 0; return rc; } EXPORT_SYMBOL_GPL(xive_native_alloc_irq_on_chip); void xive_native_free_irq(u32 irq) { for (;;) { s64 rc = opal_xive_free_irq(irq); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } } EXPORT_SYMBOL_GPL(xive_native_free_irq); #ifdef CONFIG_SMP static void xive_native_put_ipi(unsigned int cpu, struct xive_cpu *xc) { s64 rc; /* Free the IPI */ if (xc->hw_ipi == XIVE_BAD_IRQ) return; for (;;) { rc = opal_xive_free_irq(xc->hw_ipi); if (rc == OPAL_BUSY) { msleep(OPAL_BUSY_DELAY_MS); continue; } xc->hw_ipi = XIVE_BAD_IRQ; break; } } #endif /* CONFIG_SMP */ static void xive_native_shutdown(void) { /* Switch the XIVE to emulation mode */ opal_xive_reset(OPAL_XIVE_MODE_EMU); } /* * Perform an "ack" cycle on the current thread, thus * grabbing the pending active priorities and updating * the CPPR to the most favored one. */ static void xive_native_update_pending(struct xive_cpu *xc) { u8 he, cppr; u16 ack; /* Perform the acknowledge hypervisor to register cycle */ ack = be16_to_cpu(__raw_readw(xive_tima + TM_SPC_ACK_HV_REG)); /* Synchronize subsequent queue accesses */ mb(); /* * Grab the CPPR and the "HE" field which indicates the source * of the hypervisor interrupt (if any) */ cppr = ack & 0xff; he = (ack >> 8) >> 6; switch(he) { case TM_QW3_NSR_HE_NONE: /* Nothing to see here */ break; case TM_QW3_NSR_HE_PHYS: /* Physical thread interrupt */ if (cppr == 0xff) return; /* Mark the priority pending */ xc->pending_prio |= 1 << cppr; /* * A new interrupt should never have a CPPR less favored * than our current one. */ if (cppr >= xc->cppr) pr_err("CPU %d odd ack CPPR, got %d at %d\n", smp_processor_id(), cppr, xc->cppr); /* Update our idea of what the CPPR is */ xc->cppr = cppr; break; case TM_QW3_NSR_HE_POOL: /* HV Pool interrupt (unused) */ case TM_QW3_NSR_HE_LSI: /* Legacy FW LSI (unused) */ pr_err("CPU %d got unexpected interrupt type HE=%d\n", smp_processor_id(), he); return; } } static void xive_native_eoi(u32 hw_irq) { /* * Not normally used except if specific interrupts need * a workaround on EOI. */ opal_int_eoi(hw_irq); } static void xive_native_setup_cpu(unsigned int cpu, struct xive_cpu *xc) { s64 rc; u32 vp; __be64 vp_cam_be; u64 vp_cam; if (xive_pool_vps == XIVE_INVALID_VP) return; /* Check if pool VP already active, if it is, pull it */ if (in_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2) & TM_QW2W2_VP) in_be64(xive_tima + TM_SPC_PULL_POOL_CTX); /* Enable the pool VP */ vp = xive_pool_vps + cpu; for (;;) { rc = opal_xive_set_vp_info(vp, OPAL_XIVE_VP_ENABLED, 0); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } if (rc) { pr_err("Failed to enable pool VP on CPU %d\n", cpu); return; } /* Grab it's CAM value */ rc = opal_xive_get_vp_info(vp, NULL, &vp_cam_be, NULL, NULL); if (rc) { pr_err("Failed to get pool VP info CPU %d\n", cpu); return; } vp_cam = be64_to_cpu(vp_cam_be); /* Push it on the CPU (set LSMFB to 0xff to skip backlog scan) */ out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD0, 0xff); out_be32(xive_tima + TM_QW2_HV_POOL + TM_WORD2, TM_QW2W2_VP | vp_cam); } static void xive_native_teardown_cpu(unsigned int cpu, struct xive_cpu *xc) { s64 rc; u32 vp; if (xive_pool_vps == XIVE_INVALID_VP) return; /* Pull the pool VP from the CPU */ in_be64(xive_tima + TM_SPC_PULL_POOL_CTX); /* Disable it */ vp = xive_pool_vps + cpu; for (;;) { rc = opal_xive_set_vp_info(vp, 0, 0); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } } void xive_native_sync_source(u32 hw_irq) { opal_xive_sync(XIVE_SYNC_EAS, hw_irq); } EXPORT_SYMBOL_GPL(xive_native_sync_source); void xive_native_sync_queue(u32 hw_irq) { opal_xive_sync(XIVE_SYNC_QUEUE, hw_irq); } EXPORT_SYMBOL_GPL(xive_native_sync_queue); static const struct xive_ops xive_native_ops = { .populate_irq_data = xive_native_populate_irq_data, .configure_irq = xive_native_configure_irq, .get_irq_config = xive_native_get_irq_config, .setup_queue = xive_native_setup_queue, .cleanup_queue = xive_native_cleanup_queue, .match = xive_native_match, .shutdown = xive_native_shutdown, .update_pending = xive_native_update_pending, .eoi = xive_native_eoi, .setup_cpu = xive_native_setup_cpu, .teardown_cpu = xive_native_teardown_cpu, .sync_source = xive_native_sync_source, #ifdef CONFIG_SMP .get_ipi = xive_native_get_ipi, .put_ipi = xive_native_put_ipi, #endif /* CONFIG_SMP */ .name = "native", }; static bool xive_parse_provisioning(struct device_node *np) { int rc; if (of_property_read_u32(np, "ibm,xive-provision-page-size", &xive_provision_size) < 0) return true; rc = of_property_count_elems_of_size(np, "ibm,xive-provision-chips", 4); if (rc < 0) { pr_err("Error %d getting provision chips array\n", rc); return false; } xive_provision_chip_count = rc; if (rc == 0) return true; xive_provision_chips = kcalloc(4, xive_provision_chip_count, GFP_KERNEL); if (WARN_ON(!xive_provision_chips)) return false; rc = of_property_read_u32_array(np, "ibm,xive-provision-chips", xive_provision_chips, xive_provision_chip_count); if (rc < 0) { pr_err("Error %d reading provision chips array\n", rc); return false; } xive_provision_cache = kmem_cache_create("xive-provision", xive_provision_size, xive_provision_size, 0, NULL); if (!xive_provision_cache) { pr_err("Failed to allocate provision cache\n"); return false; } return true; } static void xive_native_setup_pools(void) { /* Allocate a pool big enough */ pr_debug("XIVE: Allocating VP block for pool size %u\n", nr_cpu_ids); xive_pool_vps = xive_native_alloc_vp_block(nr_cpu_ids); if (WARN_ON(xive_pool_vps == XIVE_INVALID_VP)) pr_err("XIVE: Failed to allocate pool VP, KVM might not function\n"); pr_debug("XIVE: Pool VPs allocated at 0x%x for %u max CPUs\n", xive_pool_vps, nr_cpu_ids); } u32 xive_native_default_eq_shift(void) { return xive_queue_shift; } EXPORT_SYMBOL_GPL(xive_native_default_eq_shift); unsigned long xive_tima_os; EXPORT_SYMBOL_GPL(xive_tima_os); bool __init xive_native_init(void) { struct device_node *np; struct resource r; void __iomem *tima; struct property *prop; u8 max_prio = 7; const __be32 *p; u32 val, cpu; s64 rc; if (xive_cmdline_disabled) return false; pr_devel("xive_native_init()\n"); np = of_find_compatible_node(NULL, NULL, "ibm,opal-xive-pe"); if (!np) { pr_devel("not found !\n"); return false; } pr_devel("Found %pOF\n", np); /* Resource 1 is HV window */ if (of_address_to_resource(np, 1, &r)) { pr_err("Failed to get thread mgmnt area resource\n"); return false; } tima = ioremap(r.start, resource_size(&r)); if (!tima) { pr_err("Failed to map thread mgmnt area\n"); return false; } /* Read number of priorities */ if (of_property_read_u32(np, "ibm,xive-#priorities", &val) == 0) max_prio = val - 1; /* Iterate the EQ sizes and pick one */ of_property_for_each_u32(np, "ibm,xive-eq-sizes", prop, p, val) { xive_queue_shift = val; if (val == PAGE_SHIFT) break; } /* Do we support single escalation */ if (of_get_property(np, "single-escalation-support", NULL) != NULL) xive_has_single_esc = true; /* Configure Thread Management areas for KVM */ for_each_possible_cpu(cpu) kvmppc_set_xive_tima(cpu, r.start, tima); /* Resource 2 is OS window */ if (of_address_to_resource(np, 2, &r)) { pr_err("Failed to get thread mgmnt area resource\n"); return false; } xive_tima_os = r.start; /* Grab size of provisionning pages */ xive_parse_provisioning(np); /* Switch the XIVE to exploitation mode */ rc = opal_xive_reset(OPAL_XIVE_MODE_EXPL); if (rc) { pr_err("Switch to exploitation mode failed with error %lld\n", rc); return false; } /* Setup some dummy HV pool VPs */ xive_native_setup_pools(); /* Initialize XIVE core with our backend */ if (!xive_core_init(&xive_native_ops, tima, TM_QW3_HV_PHYS, max_prio)) { opal_xive_reset(OPAL_XIVE_MODE_EMU); return false; } pr_info("Using %dkB queues\n", 1 << (xive_queue_shift - 10)); return true; } static bool xive_native_provision_pages(void) { u32 i; void *p; for (i = 0; i < xive_provision_chip_count; i++) { u32 chip = xive_provision_chips[i]; /* * XXX TODO: Try to make the allocation local to the node where * the chip resides. */ p = kmem_cache_alloc(xive_provision_cache, GFP_KERNEL); if (!p) { pr_err("Failed to allocate provisioning page\n"); return false; } kmemleak_ignore(p); opal_xive_donate_page(chip, __pa(p)); } return true; } u32 xive_native_alloc_vp_block(u32 max_vcpus) { s64 rc; u32 order; order = fls(max_vcpus) - 1; if (max_vcpus > (1 << order)) order++; pr_debug("VP block alloc, for max VCPUs %d use order %d\n", max_vcpus, order); for (;;) { rc = opal_xive_alloc_vp_block(order); switch (rc) { case OPAL_BUSY: msleep(OPAL_BUSY_DELAY_MS); break; case OPAL_XIVE_PROVISIONING: if (!xive_native_provision_pages()) return XIVE_INVALID_VP; break; default: if (rc < 0) { pr_err("OPAL failed to allocate VCPUs order %d, err %lld\n", order, rc); return XIVE_INVALID_VP; } return rc; } } } EXPORT_SYMBOL_GPL(xive_native_alloc_vp_block); void xive_native_free_vp_block(u32 vp_base) { s64 rc; if (vp_base == XIVE_INVALID_VP) return; rc = opal_xive_free_vp_block(vp_base); if (rc < 0) pr_warn("OPAL error %lld freeing VP block\n", rc); } EXPORT_SYMBOL_GPL(xive_native_free_vp_block); int xive_native_enable_vp(u32 vp_id, bool single_escalation) { s64 rc; u64 flags = OPAL_XIVE_VP_ENABLED; if (single_escalation) flags |= OPAL_XIVE_VP_SINGLE_ESCALATION; for (;;) { rc = opal_xive_set_vp_info(vp_id, flags, 0); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } return rc ? -EIO : 0; } EXPORT_SYMBOL_GPL(xive_native_enable_vp); int xive_native_disable_vp(u32 vp_id) { s64 rc; for (;;) { rc = opal_xive_set_vp_info(vp_id, 0, 0); if (rc != OPAL_BUSY) break; msleep(OPAL_BUSY_DELAY_MS); } return rc ? -EIO : 0; } EXPORT_SYMBOL_GPL(xive_native_disable_vp); int xive_native_get_vp_info(u32 vp_id, u32 *out_cam_id, u32 *out_chip_id) { __be64 vp_cam_be; __be32 vp_chip_id_be; s64 rc; rc = opal_xive_get_vp_info(vp_id, NULL, &vp_cam_be, NULL, &vp_chip_id_be); if (rc) return -EIO; *out_cam_id = be64_to_cpu(vp_cam_be) & 0xffffffffu; *out_chip_id = be32_to_cpu(vp_chip_id_be); return 0; } EXPORT_SYMBOL_GPL(xive_native_get_vp_info); bool xive_native_has_single_escalation(void) { return xive_has_single_esc; } EXPORT_SYMBOL_GPL(xive_native_has_single_escalation); int xive_native_get_queue_info(u32 vp_id, u32 prio, u64 *out_qpage, u64 *out_qsize, u64 *out_qeoi_page, u32 *out_escalate_irq, u64 *out_qflags) { __be64 qpage; __be64 qsize; __be64 qeoi_page; __be32 escalate_irq; __be64 qflags; s64 rc; rc = opal_xive_get_queue_info(vp_id, prio, &qpage, &qsize, &qeoi_page, &escalate_irq, &qflags); if (rc) { pr_err("OPAL failed to get queue info for VCPU %d/%d : %lld\n", vp_id, prio, rc); return -EIO; } if (out_qpage) *out_qpage = be64_to_cpu(qpage); if (out_qsize) *out_qsize = be32_to_cpu(qsize); if (out_qeoi_page) *out_qeoi_page = be64_to_cpu(qeoi_page); if (out_escalate_irq) *out_escalate_irq = be32_to_cpu(escalate_irq); if (out_qflags) *out_qflags = be64_to_cpu(qflags); return 0; } EXPORT_SYMBOL_GPL(xive_native_get_queue_info); int xive_native_get_queue_state(u32 vp_id, u32 prio, u32 *qtoggle, u32 *qindex) { __be32 opal_qtoggle; __be32 opal_qindex; s64 rc; rc = opal_xive_get_queue_state(vp_id, prio, &opal_qtoggle, &opal_qindex); if (rc) { pr_err("OPAL failed to get queue state for VCPU %d/%d : %lld\n", vp_id, prio, rc); return -EIO; } if (qtoggle) *qtoggle = be32_to_cpu(opal_qtoggle); if (qindex) *qindex = be32_to_cpu(opal_qindex); return 0; } EXPORT_SYMBOL_GPL(xive_native_get_queue_state); int xive_native_set_queue_state(u32 vp_id, u32 prio, u32 qtoggle, u32 qindex) { s64 rc; rc = opal_xive_set_queue_state(vp_id, prio, qtoggle, qindex); if (rc) { pr_err("OPAL failed to set queue state for VCPU %d/%d : %lld\n", vp_id, prio, rc); return -EIO; } return 0; } EXPORT_SYMBOL_GPL(xive_native_set_queue_state); bool xive_native_has_queue_state_support(void) { return opal_check_token(OPAL_XIVE_GET_QUEUE_STATE) && opal_check_token(OPAL_XIVE_SET_QUEUE_STATE); } EXPORT_SYMBOL_GPL(xive_native_has_queue_state_support); int xive_native_get_vp_state(u32 vp_id, u64 *out_state) { __be64 state; s64 rc; rc = opal_xive_get_vp_state(vp_id, &state); if (rc) { pr_err("OPAL failed to get vp state for VCPU %d : %lld\n", vp_id, rc); return -EIO; } if (out_state) *out_state = be64_to_cpu(state); return 0; } EXPORT_SYMBOL_GPL(xive_native_get_vp_state); machine_arch_initcall(powernv, xive_core_debug_init);
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