[Qemu-arm] [RFC PATCH 3/3] hw/acpi: Extract build_mcfg

[Wei Yang]

Now we have two identical build_mcfg function.

Extract them to aml-build.c.

Signed-off-by: Wei Yang <address@hidden>
---
 hw/acpi/aml-build.c         | 30 ++++++++++++++++++++++++++++++
 hw/arm/virt-acpi-build.c    | 16 ----------------
 hw/i386/acpi-build.c        | 31 +------------------------------
 include/hw/acpi/aml-build.h |  1 +
 4 files changed, 32 insertions(+), 46 deletions(-)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 555c24f21d..58d3b8f31d 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -25,6 +25,7 @@
 #include "qemu/bswap.h"
 #include "qemu/bitops.h"
 #include "sysemu/numa.h"
+#include "hw/pci/pcie_host.h"
 
 static GArray *build_alloc_array(void)
 {
@@ -1870,3 +1871,32 @@ build_hdr:
     build_header(linker, tbl, (void *)(tbl->data + fadt_start),
                  "FACP", tbl->len - fadt_start, f->rev, oem_id, oem_table_id);
 }
+
+void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
+{
+    AcpiTableMcfg *mcfg;
+    const char *sig;
+    int len = sizeof(*mcfg) + sizeof(mcfg->allocation[0]);
+
+    mcfg = acpi_data_push(table_data, len);
+    mcfg->allocation[0].address = cpu_to_le64(info->mcfg_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(info->mcfg_size - 1);
+
+    /*
+     * MCFG is used for ECAM which can be enabled or disabled by guest.
+     * To avoid table size changes (which create migration issues),
+     * always create the table even if there are no allocations,
+     * but set the signature to a reserved value in this case.
+     * ACPI spec requires OSPMs to ignore such tables.
+     */
+    if (info->mcfg_base == PCIE_BASE_ADDR_UNMAPPED) {
+        /* Reserved signature: ignored by OSPM */
+        sig = "QEMU";
+    } else {
+        sig = "MCFG";
+    }
+    build_header(linker, table_data, (void *)mcfg, sig, len, 1, NULL, NULL);
+}
diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
index ae7858a79a..92d8fccb00 100644
--- a/hw/arm/virt-acpi-build.c
+++ b/hw/arm/virt-acpi-build.c
@@ -557,22 +557,6 @@ static bool acpi_get_mcfg(AcpiMcfgInfo *mcfg)
     return true;
 }
 
-static void
-build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
-{
-    AcpiTableMcfg *mcfg;
-    int len = sizeof(*mcfg) + sizeof(mcfg->allocation[0]);
-
-    mcfg = acpi_data_push(table_data, len);
-    mcfg->allocation[0].address = cpu_to_le64(info->mcfg_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(info->mcfg_size - 1);
-
-    build_header(linker, table_data, (void *)mcfg, "MCFG", len, 1, NULL, NULL);
-}
-
 /* GTDT */
 static void
 build_gtdt(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index c5b1c3be99..b537a39d42 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2392,35 +2392,6 @@ build_srat(GArray *table_data, BIOSLinker *linker, 
MachineState *machine)
                  table_data->len - srat_start, 1, NULL, NULL);
 }
 
-static void
-build_mcfg_q35(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
-{
-    AcpiTableMcfg *mcfg;
-    const char *sig;
-    int len = sizeof(*mcfg) + 1 * sizeof(mcfg->allocation[0]);
-
-    mcfg = acpi_data_push(table_data, len);
-    mcfg->allocation[0].address = cpu_to_le64(info->mcfg_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(info->mcfg_size - 1);
-
-    /* MCFG is used for ECAM which can be enabled or disabled by guest.
-     * To avoid table size changes (which create migration issues),
-     * always create the table even if there are no allocations,
-     * but set the signature to a reserved value in this case.
-     * ACPI spec requires OSPMs to ignore such tables.
-     */
-    if (info->mcfg_base == PCIE_BASE_ADDR_UNMAPPED) {
-        /* Reserved signature: ignored by OSPM */
-        sig = "QEMU";
-    } else {
-        sig = "MCFG";
-    }
-    build_header(linker, table_data, (void *)mcfg, sig, len, 1, NULL, NULL);
-}
-
 /*
  * VT-d spec 8.1 DMA Remapping Reporting Structure
  * (version Oct. 2014 or later)
@@ -2687,7 +2658,7 @@ void acpi_build(AcpiBuildTables *tables, MachineState 
*machine)
     }
     if (acpi_get_mcfg(&mcfg)) {
         acpi_add_table(table_offsets, tables_blob);
-        build_mcfg_q35(tables_blob, tables->linker, &mcfg);
+        build_mcfg(tables_blob, tables->linker, &mcfg);
     }
     if (x86_iommu_get_default()) {
         IommuType IOMMUType = x86_iommu_get_type();
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index b63b85d67c..8f2ea3679f 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -423,4 +423,5 @@ void build_slit(GArray *table_data, BIOSLinker *linker);
 
 void build_fadt(GArray *tbl, BIOSLinker *linker, const AcpiFadtData *f,
                 const char *oem_id, const char *oem_table_id);
+void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info);
 #endif
-- 
2.19.1