From: Linus Torvalds Date: Thu, 19 May 2011 23:14:25 +0000 (-0700) Subject: Merge branches 'stable/backend.base.v3' and 'stable/gntalloc.v7' of git://git.kernel... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5318991645d78c83dde7a7bb1cba24695cc152c4;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git Merge branches 'stable/backend.base.v3' and 'stable/gntalloc.v7' of git://git./linux/kernel/git/konrad/xen * 'stable/backend.base.v3' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/pci: Fix compiler error when CONFIG_XEN_PRIVILEGED_GUEST is not set. xen/p2m: Add EXPORT_SYMBOL_GPL to the M2P override functions. xen/p2m/m2p/gnttab: Support GNTMAP_host_map in the M2P override. xen/irq: The Xen hypervisor cleans up the PIRQs if the other domain forgot. xen/irq: Export 'xen_pirq_from_irq' function. xen/irq: Add support to check if IRQ line is shared with other domains. xen/irq: Check if the PCI device is owned by a domain different than DOMID_SELF. xen/pci: Add xen_[find|register|unregister]_device_domain_owner functions. * 'stable/gntalloc.v7' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen/gntdev,gntalloc: Remove unneeded VM flags --- 5318991645d78c83dde7a7bb1cba24695cc152c4 diff --cc drivers/xen/events.c index 33167b43ac7e,e51f3c50bd40,74681478100a..35e02a10110b --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@@@ -119,86 -120,88 -128,46 +120,88 @@@@ static struct irq_chip xen_dynamic_chip static struct irq_chip xen_percpu_chip; static struct irq_chip xen_pirq_chip; -/* Constructor for packed IRQ information. */ -static struct irq_info mk_unbound_info(void) +/* Get info for IRQ */ +static struct irq_info *info_for_irq(unsigned irq) { - return (struct irq_info) { .type = IRQT_UNBOUND }; + return irq_get_handler_data(irq); } -static struct irq_info mk_evtchn_info(unsigned short evtchn) +/* Constructors for packed IRQ information. */ +static void xen_irq_info_common_init(struct irq_info *info, + unsigned irq, + enum xen_irq_type type, + unsigned short evtchn, + unsigned short cpu) { - return (struct irq_info) { .type = IRQT_EVTCHN, .evtchn = evtchn, - .cpu = 0 }; + + BUG_ON(info->type != IRQT_UNBOUND && info->type != type); + + info->type = type; + info->irq = irq; + info->evtchn = evtchn; + info->cpu = cpu; + + evtchn_to_irq[evtchn] = irq; } -static struct irq_info mk_ipi_info(unsigned short evtchn, enum ipi_vector ipi) +static void xen_irq_info_evtchn_init(unsigned irq, + unsigned short evtchn) { - return (struct irq_info) { .type = IRQT_IPI, .evtchn = evtchn, - .cpu = 0, .u.ipi = ipi }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, irq, IRQT_EVTCHN, evtchn, 0); } -static struct irq_info mk_virq_info(unsigned short evtchn, unsigned short virq) +static void xen_irq_info_ipi_init(unsigned cpu, + unsigned irq, + unsigned short evtchn, + enum ipi_vector ipi) { - return (struct irq_info) { .type = IRQT_VIRQ, .evtchn = evtchn, - .cpu = 0, .u.virq = virq }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, irq, IRQT_IPI, evtchn, 0); + + info->u.ipi = ipi; + + per_cpu(ipi_to_irq, cpu)[ipi] = irq; } -static struct irq_info mk_pirq_info(unsigned short evtchn, unsigned short pirq, - unsigned short gsi, unsigned short vector) +static void xen_irq_info_virq_init(unsigned cpu, + unsigned irq, + unsigned short evtchn, + unsigned short virq) { - return (struct irq_info) { .type = IRQT_PIRQ, .evtchn = evtchn, - .cpu = 0, - .u.pirq = { .pirq = pirq, .gsi = gsi, .vector = vector } }; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, irq, IRQT_VIRQ, evtchn, 0); + + info->u.virq = virq; + + per_cpu(virq_to_irq, cpu)[virq] = irq; } -/* - * Accessors for packed IRQ information. - */ -static struct irq_info *info_for_irq(unsigned irq) +static void xen_irq_info_pirq_init(unsigned irq, + unsigned short evtchn, + unsigned short pirq, + unsigned short gsi, + unsigned short vector, + + uint16_t domid, + unsigned char flags) { - return &irq_info[irq]; + struct irq_info *info = info_for_irq(irq); + + xen_irq_info_common_init(info, irq, IRQT_PIRQ, evtchn, 0); + + info->u.pirq.pirq = pirq; + info->u.pirq.gsi = gsi; + info->u.pirq.vector = vector; + + info->u.pirq.domid = domid; + info->u.pirq.flags = flags; } +/* + * Accessors for packed IRQ information. + */ static unsigned int evtchn_from_irq(unsigned irq) { if (unlikely(WARN(irq < 0 || irq >= nr_irqs, "Invalid irq %d!\n", irq))) @@@@ -655,8 -658,8 -663,9 +658,8 @@@@ int xen_bind_pirq_gsi_to_irq(unsigned g goto out; } - xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, - irq_info[irq] = mk_pirq_info(0, pirq, gsi, irq_op.vector); - irq_info[irq].u.pirq.flags |= shareable ? PIRQ_SHAREABLE : 0; - pirq_to_irq[pirq] = irq; + + xen_irq_info_pirq_init(irq, 0, pirq, gsi, irq_op.vector, DOMID_SELF, + shareable ? PIRQ_SHAREABLE : 0); out: spin_unlock(&irq_mapping_update_lock); @@@@ -665,24 -668,25 -674,61 +668,25 @@@@ } #ifdef CONFIG_PCI_MSI -#include -#include "../pci/msi.h" - -void xen_allocate_pirq_msi(char *name, int *irq, int *pirq, int alloc) +int xen_allocate_pirq_msi(struct pci_dev *dev, struct msi_desc *msidesc) { - spin_lock(&irq_mapping_update_lock); - - if (alloc & XEN_ALLOC_IRQ) { - *irq = find_unbound_irq(); - if (*irq == -1) - goto out; - } - - if (alloc & XEN_ALLOC_PIRQ) { - *pirq = find_unbound_pirq(MAP_PIRQ_TYPE_MSI); - if (*pirq == -1) - goto out; - } + int rc; + struct physdev_get_free_pirq op_get_free_pirq; - set_irq_chip_and_handler_name(*irq, &xen_pirq_chip, - handle_level_irq, name); + op_get_free_pirq.type = MAP_PIRQ_TYPE_MSI; + rc = HYPERVISOR_physdev_op(PHYSDEVOP_get_free_pirq, &op_get_free_pirq); - irq_info[*irq] = mk_pirq_info(0, *pirq, 0, 0); - pirq_to_irq[*pirq] = *irq; + WARN_ONCE(rc == -ENOSYS, + "hypervisor does not support the PHYSDEVOP_get_free_pirq interface\n"); -out: - spin_unlock(&irq_mapping_update_lock); + return rc ? -1 : op_get_free_pirq.pirq; } -int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type) +int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc, - int pirq, int vector, const char *name) + + int pirq, int vector, const char *name, + + domid_t domid) { - int irq = -1; - struct physdev_map_pirq map_irq; - int rc; - int pos; - u32 table_offset, bir; - - memset(&map_irq, 0, sizeof(map_irq)); - map_irq.domid = DOMID_SELF; - map_irq.type = MAP_PIRQ_TYPE_MSI; - map_irq.index = -1; - map_irq.pirq = -1; - map_irq.bus = dev->bus->number; - map_irq.devfn = dev->devfn; - - if (type == PCI_CAP_ID_MSIX) { - pos = pci_find_capability(dev, PCI_CAP_ID_MSIX); - - pci_read_config_dword(dev, msix_table_offset_reg(pos), - &table_offset); - bir = (u8)(table_offset & PCI_MSIX_FLAGS_BIRMASK); - - map_irq.table_base = pci_resource_start(dev, bir); - map_irq.entry_nr = msidesc->msi_attrib.entry_nr; - } + int irq, ret; spin_lock(&irq_mapping_update_lock); @@@@ -690,13 -694,13 -737,21 +694,13 @@@@ if (irq == -1) goto out; - rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq); - if (rc) { - printk(KERN_WARNING "xen map irq failed %d\n", rc); - - irq_free_desc(irq); - - irq = -1; - goto out; - } - irq_info[irq] = mk_pirq_info(0, map_irq.pirq, 0, map_irq.index); - - set_irq_chip_and_handler_name(irq, &xen_pirq_chip, - handle_level_irq, - (type == PCI_CAP_ID_MSIX) ? "msi-x":"msi"); + irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_level_irq, + name); - xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, 0); + + xen_irq_info_pirq_init(irq, 0, pirq, 0, vector, domid, 0); + ret = irq_set_msi_desc(irq, msidesc); + if (ret < 0) + goto error_irq; out: spin_unlock(&irq_mapping_update_lock); return irq; @@@@ -737,28 -748,34 -790,21 +748,34 @@@@ out return rc; } -int xen_vector_from_irq(unsigned irq) +int xen_irq_from_pirq(unsigned pirq) { - return vector_from_irq(irq); -} + int irq; -int xen_gsi_from_irq(unsigned irq) -{ - return gsi_from_irq(irq); + struct irq_info *info; + + spin_lock(&irq_mapping_update_lock); + + list_for_each_entry(info, &xen_irq_list_head, list) { + if (info == NULL || info->type != IRQT_PIRQ) + continue; + irq = info->irq; + if (info->u.pirq.pirq == pirq) + goto out; + } + irq = -1; +out: + spin_unlock(&irq_mapping_update_lock); + + return irq; } -int xen_irq_from_pirq(unsigned pirq) + + + +int xen_pirq_from_irq(unsigned irq) + { - return pirq_to_irq[pirq]; + + return pirq_from_irq(irq); + } - + +EXPORT_SYMBOL_GPL(xen_pirq_from_irq); int bind_evtchn_to_irq(unsigned int evtchn) { int irq; @@@@ -912,11 -929,12 -945,10 +929,11 @@@@ int bind_evtchn_to_irqhandler(unsigned unsigned long irqflags, const char *devname, void *dev_id) { -- unsigned int irq; -- int retval; ++ int irq, retval; irq = bind_evtchn_to_irq(evtchn); + if (irq < 0) + return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); @@@@ -954,11 -972,12 -963,10 +971,11 @@@@ int bind_virq_to_irqhandler(unsigned in irq_handler_t handler, unsigned long irqflags, const char *devname, void *dev_id) { -- unsigned int irq; -- int retval; ++ int irq, retval; irq = bind_virq_to_irq(virq, cpu); + if (irq < 0) + return irq; retval = request_irq(irq, handler, irqflags, devname, dev_id); if (retval != 0) { unbind_from_irq(irq); @@@@ -1502,10 -1521,22 -1442,10 +1519,22 @@@@ void xen_poll_irq(int irq xen_poll_irq_timeout(irq, 0 /* no timeout */); } + +/* Check whether the IRQ line is shared with other guests. */ + +int xen_test_irq_shared(int irq) + +{ + + struct irq_info *info = info_for_irq(irq); + + struct physdev_irq_status_query irq_status = { .irq = info->u.pirq.pirq }; + + + + if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status)) + + return 0; + + return !(irq_status.flags & XENIRQSTAT_shared); + +} + +EXPORT_SYMBOL_GPL(xen_test_irq_shared); + + void xen_irq_resume(void) { - unsigned int cpu, irq, evtchn; - struct irq_desc *desc; + unsigned int cpu, evtchn; + struct irq_info *info; init_evtchn_cpu_bindings();