[Qemu-devel] [PATCH v3 4/6] hw/arm/virt-acpi-build: pass AcpiMcfgInfo to build_mcfg()

[Wei Yang <richardw.yang@linux.intel.com>]

To build MCFG, two information is necessary:

    * bus number
    * base address

Abstract these two information to AcpiMcfgInfo so that build_mcfg and
build_mcfg_q35 will have the same declaration.

Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

---
v3:
  * move AcpiMcfgInfo to pci.h
v2:
  * for arm platform, construct a AcpiMcfgInfo directly
---
 hw/arm/virt-acpi-build.c | 18 +++++++++++-------
 hw/i386/acpi-build.c     |  6 +-----
 include/hw/acpi/pci.h    | 33 +++++++++++++++++++++++++++++++++
 3 files changed, 45 insertions(+), 12 deletions(-)
 create mode 100644 include/hw/acpi/pci.h

diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index e09e7eff8d..ebddcde596 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -40,6 +40,7 @@
 #include "hw/hw.h"
 #include "hw/acpi/aml-build.h"
 #include "hw/acpi/utils.h"
+#include "hw/acpi/pci.h"
 #include "hw/pci/pcie_host.h"
 #include "hw/pci/pci.h"
 #include "hw/arm/virt.h"
@@ -546,21 +547,18 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
 }
 
 static void
-build_mcfg(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
+build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
 {
     AcpiTableMcfg *mcfg;
-    const MemMapEntry *memmap = vms->memmap;
-    int ecam_id = VIRT_ECAM_ID(vms->highmem_ecam);
     int len = sizeof(*mcfg) + sizeof(mcfg->allocation[0]);
 
     mcfg = acpi_data_push(table_data, len);
-    mcfg->allocation[0].address = cpu_to_le64(memmap[ecam_id].base);
+    mcfg->allocation[0].address = cpu_to_le64(info->base);
 
     /* Only a single allocation so no need to play with segments */
     mcfg->allocation[0].pci_segment = cpu_to_le16(0);
     mcfg->allocation[0].start_bus_number = 0;
-    mcfg->allocation[0].end_bus_number =
-        PCIE_MMCFG_BUS(memmap[ecam_id].size - 1);
+    mcfg->allocation[0].end_bus_number = PCIE_MMCFG_BUS(info->size - 1);
 
     build_header(linker, table_data, (void *)mcfg, "MCFG", len, 1, NULL, NULL);
 }
@@ -801,7 +799,13 @@ void virt_acpi_build(VirtMachineState *vms, AcpiBuildTables *tables)
     build_gtdt(tables_blob, tables->linker, vms);
 
     acpi_add_table(table_offsets, tables_blob);
-    build_mcfg(tables_blob, tables->linker, vms);
+    {
+        AcpiMcfgInfo mcfg = {
+           .base = vms->memmap[VIRT_ECAM_ID(vms->highmem_ecam)].base,
+           .size = vms->memmap[VIRT_ECAM_ID(vms->highmem_ecam)].size,
+        };
+        build_mcfg(tables_blob, tables->linker, &mcfg);
+    }
 
     acpi_add_table(table_offsets, tables_blob);
     build_spcr(tables_blob, tables->linker, vms);
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index f0d27bffd6..c2de7f4b01 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -58,6 +58,7 @@
 
 #include "hw/acpi/aml-build.h"
 #include "hw/acpi/utils.h"
+#include "hw/acpi/pci.h"
 
 #include "qom/qom-qobject.h"
 #include "hw/i386/amd_iommu.h"
@@ -86,11 +87,6 @@
 /* Default IOAPIC ID */
 #define ACPI_BUILD_IOAPIC_ID 0x0
 
-typedef struct AcpiMcfgInfo {
-    uint64_t base;
-    uint32_t size;
-} AcpiMcfgInfo;
-
 typedef struct AcpiPmInfo {
     bool s3_disabled;
     bool s4_disabled;
diff --git a/include/hw/acpi/pci.h b/include/hw/acpi/pci.h
new file mode 100644
index 0000000000..124af7d32a
--- /dev/null
+++ b/include/hw/acpi/pci.h
@@ -0,0 +1,33 @@
+/*
+ * Support for generating PCI related ACPI tables and passing them to Guests
+ *
+ * Copyright (C) 2006 Fabrice Bellard
+ * Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
+ * Copyright (C) 2013-2019 Red Hat Inc
+ * Copyright (C) 2019 Intel Corporation
+ *
+ * Author: Wei Yang <richardw.yang@linux.intel.com>
+ * Author: Michael S. Tsirkin <mst@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef HW_ACPI_PCI_H
+#define HW_ACPI_PCI_H
+
+typedef struct AcpiMcfgInfo {
+    uint64_t base;
+    uint32_t size;
+} AcpiMcfgInfo;
+
+#endif
-- 
2.19.1