[Qemu-devel] [PATCH v2 5/9] pci: Remove cap.length, cap.start, cap.supported

[Alex Williamson <alex.williamson@redhat.com>]

Capabilities aren't required to be contiguous, so cap.length never
really made much sense.  Likewise, cap.start is mostly meaningless
too.  Both of these are better served by the capability map.  We
can also get rid of cap.supported, since it's really now unused
and redundant with flag in the status word anyway.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---

 hw/device-assignment.c |    4 ----
 hw/pci.c               |    8 +-------
 hw/pci.h               |    2 --
 3 files changed, 1 insertions(+), 13 deletions(-)

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 74cdd26..322fa9f 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -1292,8 +1292,6 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
                  pci_get_word(pci_dev->config + PCI_STATUS) &
                  ~PCI_STATUS_CAP_LIST);
 
-    pci_dev->cap.length = 0;
-
 #ifdef KVM_CAP_IRQ_ROUTING
 #ifdef KVM_CAP_DEVICE_MSI
     /* Expose MSI capability
@@ -1320,7 +1318,6 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
                      PCI_MSI_FLAGS_QSIZE | PCI_MSI_FLAGS_ENABLE);
         pci_set_long(pci_dev->wmask + vpos + PCI_MSI_ADDRESS_LO, 0xfffffffc);
         pci_set_long(pci_dev->wmask + vpos + PCI_MSI_DATA_32, 0xffff);
-        pci_dev->cap.length += PCI_CAPABILITY_CONFIG_MSI_LENGTH;
     }
 #endif
 #ifdef KVM_CAP_DEVICE_MSIX
@@ -1356,7 +1353,6 @@ static int assigned_device_pci_cap_init(PCIDevice *pci_dev)
         bar_nr = msix_table_entry & PCI_MSIX_BIR;
         msix_table_entry &= ~PCI_MSIX_BIR;
         dev->msix_table_addr = pci_region[bar_nr].base_addr + msix_table_entry;
-        pci_dev->cap.length += PCI_CAPABILITY_CONFIG_MSIX_LENGTH;
     }
 #endif
 #endif
diff --git a/hw/pci.c b/hw/pci.c
index 80610b3..a0a6126 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -1191,10 +1191,7 @@ static void pci_write_config_with_mask(PCIDevice *d, uint32_t addr,
 
 int pci_access_cap_config(PCIDevice *pci_dev, uint32_t address, int len)
 {
-    if (pci_dev->cap.supported && address >= pci_dev->cap.start &&
-            (address + len) < pci_dev->cap.start + pci_dev->cap.length)
-        return 1;
-    return 0;
+    return pci_dev->cap_map[address];
 }
 
 uint32_t pci_default_cap_read_config(PCIDevice *pci_dev,
@@ -2041,8 +2038,6 @@ int pci_add_capability_at_offset(PCIDevice *pdev, uint8_t cap_id,
     memset(pdev->cmask + offset, 0xFF, size);
 
     pdev->config[PCI_STATUS] |= PCI_STATUS_CAP_LIST;
-    pdev->cap.supported = 1;
-    pdev->cap.start = pdev->cap.start ? MIN(pdev->cap.start, offset) : offset;
 
     return offset;
 }
@@ -2073,7 +2068,6 @@ void pci_del_capability(PCIDevice *pdev, uint8_t cap_id, uint8_t size)
 
     if (!pdev->config[PCI_CAPABILITY_LIST]) {
         pdev->config[PCI_STATUS] &= ~PCI_STATUS_CAP_LIST;
-        pdev->cap.start = pdev->cap.length = 0;
     }
 }
 
diff --git a/hw/pci.h b/hw/pci.h
index 2265c70..177008a 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -208,8 +208,6 @@ struct PCIDevice {
 
     /* Device capability configuration space */
     struct {
-        int supported;
-        unsigned int start, length;
         PCICapConfigReadFunc *config_read;
         PCICapConfigWriteFunc *config_write;
     } cap;