@@ -25,6 +25,7 @@
#define MSI_ADDR_REDIRECTION_SHIFT 3
#define MSI_ADDR_DEST_ID_SHIFT 12
+#define MSI_ADDR_DEST_IDX_SHIFT 4
#define MSI_ADDR_DEST_ID_MASK 0x00ffff0
#endif /* HW_APIC_MSIDEF_H */
@@ -31,6 +31,7 @@
#define IOAPIC_VERSION 0x11
#define IOAPIC_LVT_DEST_SHIFT 56
+#define IOAPIC_LVT_DEST_IDX_SHIFT 48
#define IOAPIC_LVT_MASKED_SHIFT 16
#define IOAPIC_LVT_TRIGGER_MODE_SHIFT 15
#define IOAPIC_LVT_REMOTE_IRR_SHIFT 14
@@ -72,6 +72,10 @@ struct PCMachineState {
/* NUMA information: */
uint64_t numa_nodes;
uint64_t *node_mem;
+
+ /* Address space used by IOAPIC device. All IOAPIC interrupts
+ * will be translated to MSI messages in the address space. */
+ AddressSpace *ioapic_as;
};
#define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
@@ -28,6 +28,7 @@
#include "hw/i386/pc.h"
#include "hw/boards.h"
#include "hw/i386/x86-iommu.h"
+#include "hw/pci-host/q35.h"
/*#define DEBUG_INTEL_IOMMU*/
#ifdef DEBUG_INTEL_IOMMU
@@ -2369,7 +2370,8 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
static void vtd_realize(DeviceState *dev, Error **errp)
{
- PCIBus *bus = PC_MACHINE(qdev_get_machine())->bus;
+ PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
+ PCIBus *bus = pcms->bus;
IntelIOMMUState *s = INTEL_IOMMU_DEVICE(dev);
VTD_DPRINTF(GENERAL, "");
@@ -2385,6 +2387,8 @@ static void vtd_realize(DeviceState *dev, Error **errp)
vtd_init(s);
sysbus_mmio_map(SYS_BUS_DEVICE(s), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
pci_setup_iommu(bus, vtd_host_dma_iommu, dev);
+ /* Pseudo address space under root PCI bus. */
+ pcms->ioapic_as = vtd_host_dma_iommu(bus, s, Q35_PSEUDO_DEVFN_IOAPIC);
}
static void vtd_class_init(ObjectClass *klass, void *data)
@@ -1429,6 +1429,9 @@ void pc_memory_init(PCMachineState *pcms,
rom_add_option(option_rom[i].name, option_rom[i].bootindex);
}
pcms->fw_cfg = fw_cfg;
+
+ /* Init default IOAPIC address space */
+ pcms->ioapic_as = &address_space_memory;
}
qemu_irq pc_allocate_cpu_irq(void)
@@ -29,6 +29,8 @@
#include "hw/i386/ioapic_internal.h"
#include "include/hw/pci/msi.h"
#include "sysemu/kvm.h"
+#include "target-i386/cpu.h"
+#include "hw/i386/apic-msidef.h"
//#define DEBUG_IOAPIC
@@ -50,13 +52,15 @@ extern int ioapic_no;
static void ioapic_service(IOAPICCommonState *s)
{
+ AddressSpace *ioapic_as = PC_MACHINE(qdev_get_machine())->ioapic_as;
+ uint32_t addr, data;
uint8_t i;
uint8_t trig_mode;
uint8_t vector;
uint8_t delivery_mode;
uint32_t mask;
uint64_t entry;
- uint8_t dest;
+ uint16_t dest_idx;
uint8_t dest_mode;
for (i = 0; i < IOAPIC_NUM_PINS; i++) {
@@ -67,7 +71,14 @@ static void ioapic_service(IOAPICCommonState *s)
entry = s->ioredtbl[i];
if (!(entry & IOAPIC_LVT_MASKED)) {
trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1);
- dest = entry >> IOAPIC_LVT_DEST_SHIFT;
+ /*
+ * By default, this would be dest_id[8] +
+ * reserved[8]. When IR is enabled, this would be
+ * interrupt_index[15] + interrupt_format[1]. This
+ * field never means anything, but only used to
+ * generate corresponding MSI.
+ */
+ dest_idx = entry >> IOAPIC_LVT_DEST_IDX_SHIFT;
dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
delivery_mode =
(entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK;
@@ -97,8 +108,17 @@ static void ioapic_service(IOAPICCommonState *s)
#else
(void)coalesce;
#endif
- apic_deliver_irq(dest, dest_mode, delivery_mode, vector,
- trig_mode);
+ /* No matter whether IR is enabled, we translate
+ * the IOAPIC message into a MSI one, and its
+ * address space will decide whether we need a
+ * translation. */
+ addr = APIC_DEFAULT_ADDRESS | \
+ (dest_idx << MSI_ADDR_DEST_IDX_SHIFT) |
+ (dest_mode << MSI_ADDR_DEST_MODE_SHIFT);
+ data = (vector << MSI_DATA_VECTOR_SHIFT) |
+ (trig_mode << MSI_DATA_TRIGGER_SHIFT) |
+ (delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT);
+ stl_le_phys(ioapic_as, addr, data);
}
}
}