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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PULL 17/53] 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 <mst@xxxxxxxxxx>
---
include/hw/pci/msi.h | 2 +-
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 +-
13 files changed, 29 insertions(+), 16 deletions(-)
diff --git a/include/hw/pci/msi.h b/include/hw/pci/msi.h
index 50e452b..8124908 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);
diff --git a/hw/i386/kvm/apic.c b/hw/i386/kvm/apic.c
index 694d398..3c7c8fa 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 2b8d709..21d68ee 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 a299462..28c2ea5 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 70c0b97..ebd368b 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 903888c..7685250 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 4dcdb61..778af4a 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 100bb5e..862a2366 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 85f21b8..e0e64c2 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 537fdba..b75f0e9 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 64c4acc..298171a 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 e8edad3..3fc7895 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 dba0202..f5f679f 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 = {
--
MST
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