This makes access much easier.
Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>
---
hw/device-assignment.c | 55 ++++++++++++++++++++++--------------------------
hw/device-assignment.h | 9 +++++++-
2 files changed, 33 insertions(+), 31 deletions(-)
diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 67c417b..53c843e 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -966,10 +966,9 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
AssignedDevice *adev = DO_UPCAST(AssignedDevice, dev, pci_dev);
uint16_t entries_nr = 0, entries_max_nr;
int pos = 0, i, r = 0;
- uint32_t msg_addr, msg_upper_addr, msg_data, msg_ctrl;
struct kvm_assigned_msix_nr msix_nr;
struct kvm_assigned_msix_entry msix_entry;
- void *va = adev->msix_table_page;
+ MSIXTableEntry *entry = adev->msix_table;
pos = pci_find_capability(pci_dev, PCI_CAP_ID_MSIX);
@@ -978,12 +977,11 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
entries_max_nr += 1;
/* Get the usable entry number for allocating */
- for (i = 0; i < entries_max_nr; i++) {
- memcpy(&msg_ctrl, va + i * 16 + 12, 4);
- memcpy(&msg_data, va + i * 16 + 8, 4);
+ for (i = 0; i < entries_max_nr; i++, entry++) {
/* Ignore unused entry even it's unmasked */
- if (msg_data == 0)
+ if (entry->data == 0) {
continue;
+ }
entries_nr ++;
}
@@ -1006,16 +1004,13 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
msix_entry.assigned_dev_id = msix_nr.assigned_dev_id;
entries_nr = 0;
- for (i = 0; i < entries_max_nr; i++) {
+ entry = adev->msix_table;
+ for (i = 0; i < entries_max_nr; i++, entry++) {
if (entries_nr >= msix_nr.entry_nr)
break;
- memcpy(&msg_ctrl, va + i * 16 + 12, 4);
- memcpy(&msg_data, va + i * 16 + 8, 4);
- if (msg_data == 0)
+ if (entry->data == 0) {
continue;
-
- memcpy(&msg_addr, va + i * 16, 4);
- memcpy(&msg_upper_addr, va + i * 16 + 4, 4);
+ }
r = kvm_get_irq_route_gsi();
if (r < 0)
@@ -1024,10 +1019,11 @@ static int assigned_dev_update_msix_mmio(PCIDevice *pci_dev)
adev->entry[entries_nr].gsi = r;
adev->entry[entries_nr].type = KVM_IRQ_ROUTING_MSI;
adev->entry[entries_nr].flags = 0;
- adev->entry[entries_nr].u.msi.address_lo = msg_addr;
- adev->entry[entries_nr].u.msi.address_hi = msg_upper_addr;
- adev->entry[entries_nr].u.msi.data = msg_data;
- DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!", msg_data, msg_addr);
+ adev->entry[entries_nr].u.msi.address_lo = entry->addr_lo;
+ adev->entry[entries_nr].u.msi.address_hi = entry->addr_hi;
+ adev->entry[entries_nr].u.msi.data = entry->data;
+ DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!",
+ entry->data, entry->addr_lo);
kvm_add_routing_entry(&adev->entry[entries_nr]);
msix_entry.gsi = adev->entry[entries_nr].gsi;
@@ -1436,7 +1432,7 @@ static uint64_t msix_mmio_read(void *opaque, target_phys_addr_t addr,
AssignedDevice *adev = opaque;
uint64_t val;
- memcpy(&val, (void *)((uint8_t *)adev->msix_table_page + addr), size);
+ memcpy(&val, (void *)((uint8_t *)adev->msix_table + addr), size);
return val;
}
@@ -1449,7 +1445,7 @@ static void msix_mmio_write(void *opaque, target_phys_addr_t addr,
DEBUG("write to MSI-X entry table mmio offset 0x%lx, val 0x%lx\n",
addr, val);
- memcpy((void *)((uint8_t *)adev->msix_table_page + addr), &val, size);
+ memcpy((void *)((uint8_t *)adev->msix_table + addr), &val, size);
}
static const MemoryRegionOps msix_mmio_ops = {
@@ -1468,15 +1464,13 @@ static const MemoryRegionOps msix_mmio_ops = {
static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
{
- dev->msix_table_page = mmap(NULL, 0x1000,
- PROT_READ|PROT_WRITE,
- MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
- if (dev->msix_table_page == MAP_FAILED) {
- fprintf(stderr, "fail allocate msix_table_page! %s\n",
- strerror(errno));
+ dev->msix_table = mmap(NULL, 0x1000, PROT_READ|PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
+ if (dev->msix_table == MAP_FAILED) {
+ fprintf(stderr, "fail allocate msix_table! %s\n", strerror(errno));
return -EFAULT;
}
- memset(dev->msix_table_page, 0, 0x1000);
+ memset(dev->msix_table, 0, 0x1000);
memory_region_init_io(&dev->mmio, &msix_mmio_ops, dev,
"assigned-dev-msix", MSIX_PAGE_SIZE);
return 0;
@@ -1484,16 +1478,17 @@ static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev)
{
- if (!dev->msix_table_page)
+ if (!dev->msix_table) {
return;
+ }
memory_region_destroy(&dev->mmio);
- if (munmap(dev->msix_table_page, 0x1000) == -1) {
- fprintf(stderr, "error unmapping msix_table_page! %s\n",
+ if (munmap(dev->msix_table, 0x1000) == -1) {
+ fprintf(stderr, "error unmapping msix_table! %s\n",
strerror(errno));
}
- dev->msix_table_page = NULL;
+ dev->msix_table = NULL;
}
static const VMStateDescription vmstate_assigned_device = {
diff --git a/hw/device-assignment.h b/hw/device-assignment.h
index 1b4aecc..2e06ebb 100644
--- a/hw/device-assignment.h
+++ b/hw/device-assignment.h
@@ -80,6 +80,13 @@ typedef struct {
#define ASSIGNED_DEVICE_USE_IOMMU_MASK (1 << ASSIGNED_DEVICE_USE_IOMMU_BIT)
#define ASSIGNED_DEVICE_PREFER_MSI_MASK (1 << ASSIGNED_DEVICE_PREFER_MSI_BIT)
+typedef struct {
+ uint32_t addr_lo;
+ uint32_t addr_hi;
+ uint32_t data;
+ uint32_t ctrl;
+} MSIXTableEntry;
+
typedef struct AssignedDevice {
PCIDevice dev;
PCIHostDevice host;
@@ -108,7 +115,7 @@ typedef struct AssignedDevice {
uint8_t emulate_config_write[PCI_CONFIG_SPACE_SIZE];
int irq_entries_nr;
struct kvm_irq_routing_entry *entry;
- void *msix_table_page;
+ MSIXTableEntry *msix_table;
target_phys_addr_t msix_table_addr;
MemoryRegion mmio;
char *configfd_name;
--
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