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e461078163
build_append_foo() API doesn't need explicit endianness conversions
which eliminates a source of errors and it makes build_mcfg() look like
declarative definition of MCFG table in ACPI spec, which makes it easy
to review.
Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
Suggested-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
v3:
* add some comment on the Configuration Space base address allocation
structure
v2:
* miss the reserved[8] of MCFG in last version, add it back
* drop SOBs and make sure bios-tables-test all OK
Message-Id: <20190521062836.6541-3-richardw.yang@linux.intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
/*
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* Support for generating PCI related ACPI tables and passing them to Guests
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*
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* Copyright (C) 2006 Fabrice Bellard
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* Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
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* Copyright (C) 2013-2019 Red Hat Inc
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* Copyright (C) 2019 Intel Corporation
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*
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* Author: Wei Yang <richardw.yang@linux.intel.com>
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* Author: Michael S. Tsirkin <mst@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "hw/acpi/aml-build.h"
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#include "hw/acpi/pci.h"
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#include "hw/pci/pcie_host.h"
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void build_mcfg(GArray *table_data, BIOSLinker *linker, AcpiMcfgInfo *info)
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{
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int mcfg_start = table_data->len;
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/*
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* PCI Firmware Specification, Revision 3.0
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* 4.1.2 MCFG Table Description.
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*/
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acpi_data_push(table_data, sizeof(AcpiTableHeader));
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/* Reserved */
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build_append_int_noprefix(table_data, 0, 8);
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/*
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* Memory Mapped Enhanced Configuration Space Base Address Allocation
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* Structure
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*/
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/* Base address, processor-relative */
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build_append_int_noprefix(table_data, info->base, 8);
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/* PCI segment group number */
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build_append_int_noprefix(table_data, 0, 2);
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/* Starting PCI Bus number */
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build_append_int_noprefix(table_data, 0, 1);
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/* Final PCI Bus number */
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build_append_int_noprefix(table_data, PCIE_MMCFG_BUS(info->size - 1), 1);
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/* Reserved */
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build_append_int_noprefix(table_data, 0, 4);
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build_header(linker, table_data, (void *)(table_data->data + mcfg_start),
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"MCFG", table_data->len - mcfg_start, 1, NULL, NULL);
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}
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