From 226419d6153048cdba2fe722636220b01a1f9e96 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Fri, 4 Mar 2016 11:24:28 +0200 Subject: [PATCH] msi_supported -> msi_nonbroken Rename controller flag to make it clearer what it means. Add some documentation as well. Signed-off-by: Michael S. Tsirkin --- hw/i386/kvm/apic.c | 2 +- hw/i386/xen/xen_apic.c | 2 +- hw/intc/apic.c | 2 +- hw/intc/arm_gicv2m.c | 2 +- hw/intc/openpic.c | 2 +- hw/intc/openpic_kvm.c | 2 +- hw/pci-bridge/pci_bridge_dev.c | 2 +- hw/pci/msi.c | 19 ++++++++++++++++--- hw/pci/msix.c | 2 +- hw/ppc/spapr.c | 4 ++-- hw/ppc/spapr_pci.c | 2 +- hw/s390x/s390-pci-bus.c | 2 +- include/hw/pci/msi.h | 2 +- 13 files changed, 29 insertions(+), 16 deletions(-) diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c index 694d3989b2..3c7c8fa007 100644 --- a/hw/i386/kvm/apic.c +++ b/hw/i386/kvm/apic.c @@ -186,7 +186,7 @@ static void kvm_apic_realize(DeviceState *dev, Error **errp) APIC_SPACE_SIZE); if (kvm_has_gsi_routing()) { - msi_supported = true; + msi_nonbroken = true; } } diff --git a/hw/i386/xen/xen_apic.c b/hw/i386/xen/xen_apic.c index 2b8d709d4d..21d68ee04b 100644 --- a/hw/i386/xen/xen_apic.c +++ b/hw/i386/xen/xen_apic.c @@ -44,7 +44,7 @@ static void xen_apic_realize(DeviceState *dev, Error **errp) s->vapic_control = 0; memory_region_init_io(&s->io_memory, OBJECT(s), &xen_apic_io_ops, s, "xen-apic-msi", APIC_SPACE_SIZE); - msi_supported = true; + msi_nonbroken = true; } static void xen_apic_set_base(APICCommonState *s, uint64_t val) diff --git a/hw/intc/apic.c b/hw/intc/apic.c index a2994624f5..28c2ea5406 100644 --- a/hw/intc/apic.c +++ b/hw/intc/apic.c @@ -874,7 +874,7 @@ static void apic_realize(DeviceState *dev, Error **errp) s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, apic_timer, s); local_apics[s->idx] = s; - msi_supported = true; + msi_nonbroken = true; } static void apic_class_init(ObjectClass *klass, void *data) diff --git a/hw/intc/arm_gicv2m.c b/hw/intc/arm_gicv2m.c index 70c0b97d99..ebd368bbad 100644 --- a/hw/intc/arm_gicv2m.c +++ b/hw/intc/arm_gicv2m.c @@ -148,7 +148,7 @@ static void gicv2m_realize(DeviceState *dev, Error **errp) sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->spi[i]); } - msi_supported = true; + msi_nonbroken = true; kvm_gsi_direct_mapping = true; kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled(); } diff --git a/hw/intc/openpic.c b/hw/intc/openpic.c index 903888c02e..7685250bf4 100644 --- a/hw/intc/openpic.c +++ b/hw/intc/openpic.c @@ -1375,7 +1375,7 @@ static void fsl_common_init(OpenPICState *opp) opp->irq_msi = 224; - msi_supported = true; + msi_nonbroken = true; for (i = 0; i < opp->fsl->max_ext; i++) { opp->src[i].level = false; } diff --git a/hw/intc/openpic_kvm.c b/hw/intc/openpic_kvm.c index 4dcdb61a09..778af4a7d4 100644 --- a/hw/intc/openpic_kvm.c +++ b/hw/intc/openpic_kvm.c @@ -239,7 +239,7 @@ static void kvm_openpic_realize(DeviceState *dev, Error **errp) memory_listener_register(&opp->mem_listener, &address_space_memory); /* indicate pic capabilities */ - msi_supported = true; + msi_nonbroken = true; kvm_kernel_irqchip = true; kvm_async_interrupts_allowed = true; diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c index 100bb5ebf6..862a2366f2 100644 --- a/hw/pci-bridge/pci_bridge_dev.c +++ b/hw/pci-bridge/pci_bridge_dev.c @@ -72,7 +72,7 @@ static int pci_bridge_dev_initfn(PCIDevice *dev) goto slotid_error; } if ((bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_MSI_REQ)) && - msi_supported) { + msi_nonbroken) { err = msi_init(dev, 0, 1, true, true); if (err < 0) { goto msi_error; diff --git a/hw/pci/msi.c b/hw/pci/msi.c index 85f21b8c4b..e0e64c2d9e 100644 --- a/hw/pci/msi.c +++ b/hw/pci/msi.c @@ -34,8 +34,21 @@ #define PCI_MSI_VECTORS_MAX 32 -/* Flag for interrupt controller to declare MSI/MSI-X support */ -bool msi_supported; +/* + * Flag for interrupt controllers to declare broken MSI/MSI-X support. + * values: false - broken; true - non-broken. + * + * Setting this flag to false will remove MSI/MSI-X capability from all devices. + * + * It is preferrable for controllers to set this to true (non-broken) even if + * they do not actually support MSI/MSI-X: guests normally probe the controller + * type and do not attempt to enable MSI/MSI-X with interrupt controllers not + * supporting such, so removing the capability is not required, and + * it seems cleaner to have a given device look the same for all boards. + * + * TODO: some existing controllers violate the above rule. Identify and fix them. + */ +bool msi_nonbroken; /* If we get rid of cap allocator, we won't need this. */ static inline uint8_t msi_cap_sizeof(uint16_t flags) @@ -160,7 +173,7 @@ int msi_init(struct PCIDevice *dev, uint8_t offset, uint8_t cap_size; int config_offset; - if (!msi_supported) { + if (!msi_nonbroken) { return -ENOTSUP; } diff --git a/hw/pci/msix.c b/hw/pci/msix.c index 537fdba747..b75f0e9c47 100644 --- a/hw/pci/msix.c +++ b/hw/pci/msix.c @@ -249,7 +249,7 @@ int msix_init(struct PCIDevice *dev, unsigned short nentries, uint8_t *config; /* Nothing to do if MSI is not supported by interrupt controller */ - if (!msi_supported) { + if (!msi_nonbroken) { return -ENOTSUP; } diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 64c4acce06..298171a205 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -439,7 +439,7 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base, _FDT((fdt_property_cell(fdt, "rtas-event-scan-rate", RTAS_EVENT_SCAN_RATE))); - if (msi_supported) { + if (msi_nonbroken) { _FDT((fdt_property(fdt, "ibm,change-msix-capable", NULL, 0))); } @@ -1743,7 +1743,7 @@ static void ppc_spapr_init(MachineState *machine) bool kernel_le = false; char *filename; - msi_supported = true; + msi_nonbroken = true; QLIST_INIT(&spapr->phbs); diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index e8edad3ab7..3fc78955ec 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1790,7 +1790,7 @@ void spapr_pci_rtas_init(void) rtas_ibm_read_pci_config); spapr_rtas_register(RTAS_IBM_WRITE_PCI_CONFIG, "ibm,write-pci-config", rtas_ibm_write_pci_config); - if (msi_supported) { + if (msi_nonbroken) { spapr_rtas_register(RTAS_IBM_QUERY_INTERRUPT_SOURCE_NUMBER, "ibm,query-interrupt-source-number", rtas_ibm_query_interrupt_source_number); diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c index dba0202b70..f5f679f82c 100644 --- a/hw/s390x/s390-pci-bus.c +++ b/hw/s390x/s390-pci-bus.c @@ -597,7 +597,7 @@ static void s390_pcihost_class_init(ObjectClass *klass, void *data) k->init = s390_pcihost_init; hc->plug = s390_pcihost_hot_plug; hc->unplug = s390_pcihost_hot_unplug; - msi_supported = true; + msi_nonbroken = true; } static const TypeInfo s390_pcihost_info = { diff --git a/include/hw/pci/msi.h b/include/hw/pci/msi.h index 50e452bd05..8124908abd 100644 --- a/include/hw/pci/msi.h +++ b/include/hw/pci/msi.h @@ -29,7 +29,7 @@ struct MSIMessage { uint32_t data; }; -extern bool msi_supported; +extern bool msi_nonbroken; void msi_set_message(PCIDevice *dev, MSIMessage msg); MSIMessage msi_get_message(PCIDevice *dev, unsigned int vector); -- 2.11.0