include/hw/pci/pcie_host: Correct PCIE_MMCFG_SIZE_MAX

According to 7.2.2 in [1] bit 27 is the last bit that can be part of the
bus number, this makes the ECAM max size equal to '1 << 28'. This patch
restores back this value into the PCIE_MMCFG_SIZE_MAX define (which was
changed in commit 58d5b22bbd5 ("ppc4xx: Add device models found in PPC440
core SoCs")).

[1] PCI Express® Base Specification Revision 5.0 Version 1.0

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Message-Id: <20220411221836.17699-3-frasse.iglesias@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/include/hw/pci/pcie_host.h b/include/hw/pci/pcie_host.h
index b3c8ce9..82d9217 100644 (file)
--- a/include/hw/pci/pcie_host.h
+++ b/include/hw/pci/pcie_host.h
@@ -65,7 +65,7 @@ void pcie_host_mmcfg_update(PCIExpressHost *e,
  * bit 12 - 14: function number
  * bit  0 - 11: offset in configuration space of a given device
  */
-#define PCIE_MMCFG_SIZE_MAX             (1ULL << 29)
+#define PCIE_MMCFG_SIZE_MAX             (1ULL << 28)
 #define PCIE_MMCFG_SIZE_MIN             (1ULL << 20)
 #define PCIE_MMCFG_BUS_BIT              20
 #define PCIE_MMCFG_BUS_MASK             0xff