msix: drop unused msix_bar_size, require valid bar_size

No user in sight for msix_bar_size.
bar_size for all users is aligned, let's simply
require this instead of trying to fix up invalid input.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

3 files changed, 3 insertions, 21 deletions

diff --git a/hw/msix.c b/hw/msix.c
index ded3c55..b64f109 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -55,24 +55,17 @@ static int msix_add_config(struct PCIDevice *pdev, unsigned short nentries,
 {
     int config_offset;
     uint8_t *config;
-    uint32_t new_size;
 
     if (nentries < 1 || nentries > PCI_MSIX_FLAGS_QSIZE + 1)
         return -EINVAL;
     if (bar_size > 0x80000000)
         return -ENOSPC;
 
-    /* Add space for MSI-X structures */
-    if (!bar_size) {
-        new_size = MSIX_PAGE_SIZE;
-    } else if (bar_size < MSIX_PAGE_SIZE) {
-        bar_size = MSIX_PAGE_SIZE;
-        new_size = MSIX_PAGE_SIZE * 2;
-    } else {
-        new_size = bar_size * 2;
+    /* Require aligned offset for MSI-X structures */
+    if (bar_size & ~(MSIX_PAGE_SIZE - 1)) {
+        return -EINVAL;
     }
 
-    pdev->msix_bar_size = new_size;
     config_offset = pci_add_capability(pdev, PCI_CAP_ID_MSIX,
                                        0, MSIX_CAP_LENGTH);
     if (config_offset < 0)
@@ -382,13 +375,6 @@ int msix_enabled(PCIDevice *dev)
          MSIX_ENABLE_MASK);
 }
 
-/* Size of bar where MSI-X table resides, or 0 if MSI-X not supported. */
-uint32_t msix_bar_size(PCIDevice *dev)
-{
-    return (dev->cap_present & QEMU_PCI_CAP_MSIX) ?
-        dev->msix_bar_size : 0;
-}
-
 /* Send an MSI-X message */
 void msix_notify(PCIDevice *dev, unsigned vector)
 {
diff --git a/hw/msix.h b/hw/msix.h
index 50aee82..e5a488d 100644
--- a/hw/msix.h
+++ b/hw/msix.h
@@ -21,8 +21,6 @@ void msix_load(PCIDevice *dev, QEMUFile *f);
 int msix_enabled(PCIDevice *dev);
 int msix_present(PCIDevice *dev);
 
-uint32_t msix_bar_size(PCIDevice *dev);
-
 int msix_vector_use(PCIDevice *dev, unsigned vector);
 void msix_vector_unuse(PCIDevice *dev, unsigned vector);
 void msix_unuse_all_vectors(PCIDevice *dev);
diff --git a/hw/pci.h b/hw/pci.h
index c3cacce..3d534e7 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -226,8 +226,6 @@ struct PCIDevice {
     MemoryRegion msix_mmio;
     /* Reference-count for entries actually in use by driver. */
     unsigned *msix_entry_used;
-    /* Region including the MSI-X table */
-    uint32_t msix_bar_size;
     /* MSIX function mask set or MSIX disabled */
     bool msix_function_masked;
     /* Version id needed for VMState */