Commit Graph

166 Commits

Author SHA1 Message Date
Peng Liang
13a637430b hw/arm/virt-acpi-build.c: Add missing header
virt-acpi-build.c uses warn_report. However, it doesn't include
qemu/error-report.h directly, it include qemu/error-report.h via trace.h
if we enable log trace backend. But if we disable the log trace backend
(e.g., --enable-trace-backends=nop), then virt-acpi-build.c will not
include qemu/error-report.h any more and it will lead to build errors.
Include qemu/error-report.h directly in virt-acpi-build.c to avoid the
errors.

Fixes: 451b157041 ("acpi: Align the size to 128k")
Signed-off-by: Peng Liang <tcx4c70@gmail.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(mjt: move the #include higher as suggested by Ani Sinha)
2023-07-08 07:24:38 +03:00
Philippe Mathieu-Daudé
0c40daf038 hw/intc/arm_gic: Un-inline GIC*/ITS class_name() helpers
"kvm_arm.h" contains external and internal prototype declarations.
Files under the hw/ directory should only access the KVM external
API.

In order to avoid machine / device models to include "kvm_arm.h"
simply to get the QOM GIC/ITS class name, un-inline each class
name getter to the proper device model file.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230405160454.97436-4-philmd@linaro.org>
2023-06-28 14:27:59 +02:00
Stefan Weil
b3db996ffc hw/arm: Fix some typos in comments (most found by codespell)
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230409200526.1156456-1-sw@weilnetz.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-04-20 10:21:13 +01:00
Xiang Chen
7cbd3fd3d2 hw/arm/virt: Enable HMAT on arm virt machine
Since the patchset ("Build ACPI Heterogeneous Memory Attribute Table (HMAT)"),
HMAT is supported, but only x86 is enabled. Enable HMAT on arm virt machine.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: Hesham Almatary <hesham.almatary@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20221027100037.251-7-hesham.almatary@huawei.com>
Tested-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 14:08:17 -05:00
Miguel Luis
7fe4c35cea acpi: arm/virt: madt: bump to revision 4 accordingly to ACPI 6.0 Errata A
MADT has been updated with the GIC Structures from ACPI 6.0 Errata A
and so MADT revision and GICC Structure must be updated also.

Fixes: 37f33084ed ("acpi: arm/virt: madt: use build_append_int_noprefix() API to compose MADT table")

Signed-off-by: Miguel Luis <miguel.luis@oracle.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Message-Id: <20221011181730.10885-4-miguel.luis@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:19 -05:00
Miguel Luis
4496d1d3eb acpi: fadt: support revision 6.0 of the ACPI specification
Update the Fixed ACPI Description Table (FADT) to revision 6.0 of the ACPI
specification adding the field "Hypervisor Vendor Identity".

This field's description states the following: "64-bit identifier of hypervisor
vendor. All bytes in this field are considered part of the vendor identity.
These identifiers are defined independently by the vendors themselves,
usually following the name of the hypervisor product. Version information
should NOT be included in this field - this shall simply denote the vendor's
name or identifier. Version information can be communicated through a
supplemental vendor-specific hypervisor API. Firmware implementers would
place zero bytes into this field, denoting that no hypervisor is present in
the actual firmware."

Signed-off-by: Miguel Luis <miguel.luis@oracle.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Message-Id: <20221011181730.10885-3-miguel.luis@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:19 -05:00
Miguel Luis
5dbc9a2785 acpi: arm/virt: build_gtdt: fix invalid 64-bit physical addresses
Per the ACPI 6.5 specification, on the GTDT Table Structure, the Counter Control
Block Address and Counter Read Block Address fields of the GTDT table should be
set to 0xFFFFFFFFFFFFFFFF if not provided, rather than 0x0.

Fixes: 41041e5708 ("acpi: arm/virt: build_gtdt: use acpi_table_begin()/acpi_table_end() instead of build_header()")

Signed-off-by: Miguel Luis <miguel.luis@oracle.com>
Message-Id: <20220920162137.75239-3-miguel.luis@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
2022-10-09 16:38:45 -04:00
Zenghui Yu
e1f045780b hw/arm/virt-acpi-build: Present the GICR structure properly for GICv4
With the introduction of the new TCG GICv4, build_madt() is badly broken
as we do not present any GIC Redistributor structure in MADT for GICv4
guests, so that they have no idea about where the Redistributor
register frames are. This fixes a Linux guest crash at boot time with
ACPI enabled and '-machine gic-version=4'.

While at it, let's convert the remaining hard coded gic_version into
enumeration VIRT_GIC_VERSION_2 for consistency.

Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Message-id: 20220812022018.1069-1-yuzenghui@huawei.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-08-12 11:25:18 +01:00
Marc Zyngier
2dcb74e5c2 hw/arm/virt: Drop superfluous checks against highmem
Now that the devices present in the extended memory map are checked
against the available PA space and disabled when they don't fit,
there is no need to keep the same checks against highmem, as
highmem really is a shortcut for the PA space being 32bit.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Message-id: 20220114140741.1358263-7-maz@kernel.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-01-20 11:47:53 +00:00
Marc Zyngier
a63618b147 hw/arm/virt: Add a control for the the highmem redistributors
Just like we can control the enablement of the highmem PCIe region
using highmem_ecam, let's add a control for the highmem GICv3
redistributor region.

Similarily to highmem_ecam, these redistributors are disabled when
highmem is off.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220114140741.1358263-3-maz@kernel.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-01-20 11:47:52 +00:00
Marc Zyngier
c8f008c40f hw/arm/virt: Add a control for the the highmem PCIe MMIO
Just like we can control the enablement of the highmem PCIe ECAM
region using highmem_ecam, let's add a control for the highmem
PCIe MMIO  region.

Similarily to highmem_ecam, this region is disabled when highmem
is off.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20220114140741.1358263-2-maz@kernel.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-01-20 11:47:52 +00:00
Stefan Berger
5903646d39 acpi: tpm: Add missing device identification objects
Add missing TPM device identification objects _STR and _UID. They will
appear as files 'description' and 'uid' under Linux sysfs.

Following inspection of sysfs entries for hardware TPMs we chose
uid '1'.

Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Ani Sinha <ani@anisinha.ca>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/708
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Ani Sinha <ani@anisinha.ca>
Reviewed-by: Shannon Zhao <shannon.zhaosl@gmail.com>
Message-id: 20211223022310.575496-3-stefanb@linux.ibm.com
Message-Id: <20220104175806.872996-3-stefanb@linux.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
2022-01-07 19:30:13 -05:00
Jean-Philippe Brucker
cf1a5cc935 hw/arm/virt-acpi-build: Add VIOT table for virtio-iommu
When a virtio-iommu is instantiated, describe it using the ACPI VIOT
table.

Acked-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Message-id: 20211210170415.583179-2-jean-philippe@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-12-15 10:35:26 +00:00
Yanan Wang
70d23ed534 hw/arm/virt-acpi-build: Generate PPTT table
Generate the Processor Properties Topology Table (PPTT) for ARM
virt machines supporting it (>= 6.2).

Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20211020142125.7516-8-wangyanan55@huawei.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-10-21 08:04:15 -07:00
Eric Auger
f0dc9a5d8d hw/arm/virt_acpi_build: Generate DBG2 table
ARM SBBR specification mandates DBG2 table (Debug Port Table 2)
since v1.0 (ARM DEN0044F 8.3.1.7 DBG2).

The DBG2 table allows to describe one or more debug ports.

Generate an DBG2 table featuring a single debug port, the PL011.

The DBG2 specification can be found at
"Microsoft Debug Port Table 2 (DBG2)"
https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/acpi-debug-port-table?redirectedfrom=MSDN

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20211019080037.930641-3-eric.auger@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-10-20 18:17:30 -07:00
Eric Auger
1c2cb7e0b3 hw/arm/virt-acpi-build: IORT upgrade up to revision E.b
Upgrade the IORT table from B to E.b specification
revision (ARM DEN 0049E.b).

The SMMUv3 and root complex node have additional
fields. Also unique IORT node identifiers are
introduced: they are generated in sequential order.
They are not cross-referenced though.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20211014115643.756977-3-eric.auger@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-10-20 16:26:19 -07:00
Igor Mammedov
41041e5708 acpi: arm/virt: build_gtdt: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

while at it, replace packed structure with endian agnostic
build_append_FOO() API.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-33-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
a86d86ac0a acpi: arm/virt: build_spcr: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

while at it, replace packed structure with endian agnostic
build_append_FOO() API.

PS:
Spec is Microsoft hosted, however 1.02 is no where to be found
(MS lists only the current revision) and the current revision is 1.07,
so bring comments in line with 1.07 as this is the only available spec.
There is no content change between originally implemented 1.02
(using QEMU code as reference) and 1.07. The only change is renaming
'Reserved2' field to 'Language', with the same 0 value.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-32-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
88b1045ead acpi: arm/virt: build_spcr: fix invalid cast
implicit cast to structure uint8_t member didn't raise error when
assigning value from incorrect enum, but when using build_append_gas()
(next patch) it will error out with (clang):
  implicit conversion from enumeration type 'AmlRegionSpace'
  to different enumeration type 'AmlAddressSpace'
fix cast error by using correct AML_AS_SYSTEM_MEMORY enum

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-31-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
271cbb2f2b acpi: arm/virt: convert build_iort() to endian agnostic build_append_FOO() API
Drop usage of packed structures and explicit endian conversions
when building IORT table use endian agnostic build_append_int_noprefix()
API to build it.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20210924122802.1455362-30-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
3548494e49 acpi: arm: virt: build_iort: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-29-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
fc02b86982 acpi: arm: virt: build_dsdt: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-28-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
37f33084ed acpi: arm/virt: madt: use build_append_int_noprefix() API to compose MADT table
Drop usage of packed structures and explicit endian conversions
when building MADT table for arm/x86 and use endian agnostic
build_append_int_noprefix() API to build it.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-26-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
99a7545f92 acpi: madt: arm/x86: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-22-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
e5b6d55a6e acpi: use build_append_int_noprefix() API to compose SRAT table
Drop usage of packed structures and explicit endian conversions
when building SRAT tables for arm/x86 and use endian agnostic
build_append_int_noprefix() API to build it.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-18-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Igor Mammedov
255bf20f2e acpi: arm/x86: build_srat: use acpi_table_begin()/acpi_table_end() instead of build_header()
it replaces error-prone pointer arithmetic for build_header() API,
with 2 calls to start and finish table creation,
which hides offsets magic from API user.

While at it switch to build_append_int_noprefix() to build
table entries (which also removes some manual offset
calculations)

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20210924122802.1455362-17-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-10-05 17:30:57 -04:00
Xingang Wang
42e0f050e3 hw/arm/virt-acpi-build: Add IORT support to bypass SMMUv3
When we build IORT table with SMMUv3 and bypass iommu feature enabled,
we can no longer setup one map from RC to SMMUv3 covering the whole RIDs.
We need to walk the PCI bus and check whether the root bus will bypass
iommu, setup RC -> SMMUv3 -> ITS map for RC which will not bypass iommu.

When a SMMUv3 node exist, we setup the idmap from SMMUv3 to ITS
covering the whole RIDs, and only modify the map from RC to SMMUv3.
We build RC -> SMMUv3 -> ITS map for root bus with bypass_iommu
disabled, and build idmap from RC to ITS directly for the rest of
the whole RID space.

For example we run qemu with command line:

qemu/build/aarch64-softmmu/qemu-system-aarch64 \
 -kernel arch/arm64/boot/Image \
 -enable-kvm \
 -cpu host \
 -m 8G \
 -smp 8,sockets=2,cores=4,threads=1 \
 -machine virt,kernel_irqchip=on,gic-version=3,iommu=smmuv3,default_bus_bypass_iommu=true \
 -drive file=./QEMU_EFI-pflash.raw,if=pflash,format=raw,unit=0,readonly=on \
 -device pxb-pcie,bus_nr=0x10,id=pci.10,bus=pcie.0,addr=0x3.0x1 \
 -device pxb-pcie,bus_nr=0x20,id=pci.20,bus=pcie.0,addr=0x3.0x2,bypass_iommu=true \
 -device pcie-root-port,port=0x20,chassis=1,id=pci.1,bus=pcie.0,addr=0x2 \
 -device pcie-root-port,port=0x20,chassis=11,id=pci.11,bus=pci.10,addr=0x1 \
 -device pcie-root-port,port=0x20,chassis=21,id=pci.21,bus=pci.20,addr=0x1 \
 -device virtio-scsi-pci,id=scsi0,bus=pci.1,addr=0x1 \
 -device virtio-scsi-pci,id=scsi1,bus=pci.11,addr=0x1 \
 -device virtio-scsi-pci,id=scsi2,bus=pci.21,addr=0x1 \
 -initrd /mnt/davinci/wxg/kill-linux/rootfs/mfs.cpio.gz \
 -nographic \
 -append "rdinit=init console=ttyAMA0 earlycon=pl011,0x9000000 nokaslr" \

And we get guest configuration:

-+-[0000:20]---01.0-[21]--
 +-[0000:10]---01.0-[11]--
 \-[0000:00]-+-00.0  Device 1b36:0008
             +-01.0  Device 1af4:1000
             \-02.0-[01]--

With bypass_iommu enabled, the attached devices will bypass iommu.

/sys/class/iommu/smmu3.0x0000000009050000/
|-- device -> ../../../arm-smmu-v3.0.auto
|-- devices
|   `-- 0000:10:01.0 -> ../../../../../pci0000:10/0000:10:01.0

Signed-off-by: Xingang Wang <wangxingang5@huawei.com>
Message-Id: <1625748919-52456-7-git-send-email-wangxingang5@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-07-16 11:10:45 -04:00
Stefan Berger
f50be48a7b arm: Eliminate all TPM related code if CONFIG_TPM is not set
Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210614191335.1968807-3-stefanb@linux.ibm.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2021-06-15 10:54:55 -04:00
Zenghui Yu
0c38f60783 hw/arm/virt-acpi-build: Fix GSIV values of the {GERR, Sync} interrupts
The GSIV values in SMMUv3 IORT node are not correct as they don't match
the SMMUIrq enumeration, which describes the IRQ<->PIN mapping used by
our emulated vSMMU.

Fixes: a703b4f6c1 ("hw/arm/virt-acpi-build: Add smmuv3 node in IORT table")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Acked-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20210402084731.93-1-yuzenghui@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-04-12 11:06:24 +01:00
David Hildenbrand
6930ba0d44 acpi: Move maximum size logic into acpi_add_rom_blob()
We want to have safety margins for all tables based on the table type.
Let's move the maximum size logic into acpi_add_rom_blob() and make it
dependent on the table name, so we don't have to replicate for each and
every instance that creates such tables.

Suggested-by: Laszlo Ersek <lersek@redhat.com>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210304105554.121674-4-david@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-03-22 18:58:19 -04:00
David Hildenbrand
6c2b24d1d2 acpi: Set proper maximum size for "etc/table-loader" blob
The resizeable memory region / RAMBlock that is created for the cmd blob
has a maximum size of whole host pages (e.g., 4k), because RAMBlocks
work on full host pages. In addition, in i386 ACPI code:
  acpi_align_size(tables->linker->cmd_blob, ACPI_BUILD_ALIGN_SIZE);
makes sure to align to multiples of 4k, padding with 0.

For example, if our cmd_blob is created with a size of 2k, the maximum
size is 4k - we cannot grow beyond that. Growing might be required
due to guest action when rebuilding the tables, but also on incoming
migration.

This automatic generation of the maximum size used to be sufficient,
however, there are cases where we cross host pages now when growing at
runtime: we exceed the maximum size of the RAMBlock and can crash QEMU when
trying to resize the resizeable memory region / RAMBlock:
  $ build/qemu-system-x86_64 --enable-kvm \
      -machine q35,nvdimm=on \
      -smp 1 \
      -cpu host \
      -m size=2G,slots=8,maxmem=4G \
      -object memory-backend-file,id=mem0,mem-path=/tmp/nvdimm,size=256M \
      -device nvdimm,label-size=131072,memdev=mem0,id=nvdimm0,slot=1 \
      -nodefaults \
      -device vmgenid \
      -device intel-iommu

Results in:
  Unexpected error in qemu_ram_resize() at ../softmmu/physmem.c:1850:
  qemu-system-x86_64: Size too large: /rom@etc/table-loader:
    0x2000 > 0x1000: Invalid argument

In this configuration, we consume exactly 4k (32 entries, 128 bytes each)
when creating the VM. However, once the guest boots up and maps the MCFG,
we also create the MCFG table and end up consuming 2 additional entries
(pointer + checksum) -- which is where we try resizing the memory region
/ RAMBlock, however, the maximum size does not allow for it.

Currently, we get the following maximum sizes for our different
mutable tables based on behavior of resizeable RAMBlock:

  hw       table                max_size
  -------  ---------------------------------------------------------

  virt     "etc/acpi/tables"    ACPI_BUILD_TABLE_MAX_SIZE (0x200000)
  virt     "etc/table-loader"   HOST_PAGE_ALIGN(initial_size)
  virt     "etc/acpi/rsdp"      HOST_PAGE_ALIGN(initial_size)

  i386     "etc/acpi/tables"    ACPI_BUILD_TABLE_MAX_SIZE (0x200000)
  i386     "etc/table-loader"   HOST_PAGE_ALIGN(initial_size)
  i386     "etc/acpi/rsdp"      HOST_PAGE_ALIGN(initial_size)

  microvm  "etc/acpi/tables"    ACPI_BUILD_TABLE_MAX_SIZE (0x200000)
  microvm  "etc/table-loader"   HOST_PAGE_ALIGN(initial_size)
  microvm  "etc/acpi/rsdp"      HOST_PAGE_ALIGN(initial_size)

Let's set the maximum table size for "etc/table-loader" to 64k, so we
can properly grow at runtime, which should be good enough for the future.

Migration is not concerned with the maximum size of a RAMBlock, only
with the used size - so existing setups are not affected. Of course, we
cannot migrate a VM that would have crash when started on older QEMU from
new QEMU to older QEMU without failing early on the destination when
synchronizing the RAM state:
    qemu-system-x86_64: Size too large: /rom@etc/table-loader: 0x2000 > 0x1000: Invalid argument
    qemu-system-x86_64: error while loading state for instance 0x0 of device 'ram'
    qemu-system-x86_64: load of migration failed: Invalid argument

We'll refactor the code next, to make sure we get rid of this implicit
behavior for "etc/acpi/rsdp" as well and to make the code easier to
grasp.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Cc: Alistair Francis <alistair.francis@xilinx.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Shannon Zhao <shannon.zhaosl@gmail.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210304105554.121674-2-david@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-03-22 18:58:19 -04:00
Marian Postevca
602b458201 acpi: Permit OEM ID and OEM table ID fields to be changed
Qemu's ACPI table generation sets the fields OEM ID and OEM table ID
to "BOCHS " and "BXPCxxxx" where "xxxx" is replaced by the ACPI
table name.

Some games like Red Dead Redemption 2 seem to check the ACPI OEM ID
and OEM table ID for the strings "BOCHS" and "BXPC" and if they are
found, the game crashes(this may be an intentional detection
mechanism to prevent playing the game in a virtualized environment).

This patch allows you to override these default values.

The feature can be used in this manner:
qemu -machine oem-id=ABCDEF,oem-table-id=GHIJKLMN

The oem-id string can be up to 6 bytes in size, and the
oem-table-id string can be up to 8 bytes in size. If the string are
smaller than their respective sizes they will be padded with space.
If either of these parameters is not set, the current default values
will be used for the one missing.

Note that the the OEM Table ID field will not be extended with the
name of the table, but will use either the default name or the user
provided one.

This does not affect the -acpitable option (for user-defined ACPI
tables), which has precedence over -machine option.

Signed-off-by: Marian Postevca <posteuca@mutex.one>
Message-Id: <20210119003216.17637-3-posteuca@mutex.one>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2021-02-05 08:52:59 -05:00
Andrew Jones
9cd07db94b hw/arm/virt: Remove virt machine state 'smp_cpus'
virt machine's 'smp_cpus' and machine->smp.cpus must always have the
same value. And, anywhere we have virt machine state we have machine
state. So let's remove the redundancy. Also, to make it easier to see
that machine->smp is the true source for "smp_cpus" and "max_cpus",
avoid passing them in function parameters, preferring instead to get
them from the state.

No functional change intended.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: David Edmondson <david.edmondson@oracle.com>
Reviewed-by: Ying Fang <fangying1@huawei.com>
Message-id: 20201215174815.51520-1-drjones@redhat.com
[PMM: minor formatting tweak to smp_cpus variable declaration]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2021-01-08 15:13:38 +00:00
Yubo Miao
451b157041 acpi: Align the size to 128k
If table size is changed between virt_acpi_build and
virt_acpi_build_update, the table size would not be updated to
UEFI, therefore, just align the size to 128kb, which is enough
and same with x86. It would warn if 64k is not enough and the
align size should be updated.

Signed-off-by: Yubo Miao <miaoyubo@huawei.com>
Signed-off-by: Jiahui Cen <cenjiahui@huawei.com>
Message-Id: <20201119014841.7298-7-cenjiahui@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-08 13:48:57 -05:00
Yubo Miao
6f9765fbad acpi/gpex: Build tables for pxb
The resources of pxbs are obtained by crs_build and the resources
used by pxbs would be moved from the resources defined for host-bridge.

The resources for pxb are composed of following two parts:
1. The bar space of the pci-bridge/pcie-root-port behined it
2. The config space of devices behind it.

Signed-off-by: Yubo Miao <miaoyubo@huawei.com>
Signed-off-by: Jiahui Cen <cenjiahui@huawei.com>
Message-Id: <20201119014841.7298-6-cenjiahui@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-08 13:48:57 -05:00
Gerd Hoffmann
06d2dd4911 arm: use acpi_dsdt_add_gpex
Fill gpex config struct from memory map, then call the new
acpi_dsdt_add_gpex helper function.  No functional change.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200928104256.9241-4-kraxel@redhat.com
2020-09-30 11:29:56 +02:00
Gerd Hoffmann
7bf2567c12 acpi: move acpi_dsdt_add_power_button() to ged
Allow reuse for microvm.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-id: 20200915120909.20838-7-kraxel@redhat.com
2020-09-17 14:16:19 +02:00
Chen Qun
b3b0e81458 hw/arm/virt-acpi-build:Remove dead assignment in build_madt()
Clang static code analyzer show warning:
hw/arm/virt-acpi-build.c:641:5: warning: Value stored to 'madt' is never read
    madt = acpi_data_push(table_data, sizeof *madt);
    ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Euler Robot <euler.robot@huawei.com>
Signed-off-by: Chen Qun <kuhn.chenqun@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20200827110311.164316-2-kuhn.chenqun@huawei.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-09-01 11:52:25 +02:00
Michael S. Tsirkin
9b897b399e arm/acpi: fix an out of spec _UID for PCI root
On ARM/virt machine type QEMU currently reports an incorrect _UID in
ACPI.

The particular node in question is the primary PciRoot (PCI0 in ACPI),
which gets assigned PCI0 in ACPI UID and 0 in the
DevicePath. This is due to the _UID assigned to it by build_dsdt in
hw/arm/virt-acpi-build.c Which does not correspond to the primary PCI
identifier given by pcibus_num in hw/pci/pci.c

In UEFI v2.8, section "10.4.2 Rules with ACPI _HID and _UID" ends with
the paragraph,

    Root PCI bridges will use the plug and play ID of PNP0A03, This will
    be stored in the ACPI Device Path _HID field, or in the Expanded
    ACPI Device Path _CID field to match the ACPI name space. The _UID
    in the ACPI Device Path structure must match the _UID in the ACPI
    name space.

(See especially the last sentence.)

A similar bug has been reported on i386, on that architecture it has
been reported to confuse at least macOS which uses ACPI UIDs to build
the DevicePath for NVRAM boot options, while OVMF firmware gets them via
an internal channel through QEMU.  When UEFI firmware and ACPI have
different values, this makes the underlying operating system unable to
report its boot option.

Cc: qemu-stable@nongnu.org
Reported-by: Vitaly Cheptsov <vit9696@protonmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
2020-08-27 08:27:48 -04:00
Andrew Jones
2c1fb4d5c0 hw/arm/virt-acpi-build: Only expose flash on older machine types
The flash device is exclusively for the host-controlled firmware, so
we should not expose it to the OS. Exposing it risks the OS messing
with it, which could break firmware runtime services and surprise the
OS when all its changes disappear after reboot.

As firmware needs the device and uses DT, we leave the device exposed
there. It's up to firmware to remove the nodes from DT before sending
it on to the OS. However, there's no need to force firmware to remove
tables from ACPI (which it doesn't know how to do anyway), so we
simply don't add the tables in the first place. But, as we've been
adding the tables for quite some time and don't want to change the
default hardware exposed to versioned machines, then we only stop
exposing the flash device tables for 5.1 and later machine types.

Suggested-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Suggested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 20200629140938.17566-4-drjones@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-07-03 16:59:43 +01:00
Eric Auger
5ab540e9b7 arm/acpi: Add the TPM2.0 device under the DSDT
In case it is dynamically instantiated, add the TPM 2.0 device object
under the DSDT table in the ACPI namespace. Its HID is MSFT0101
while its current resource settings (CRS) property is initialized
with the guest physical address and MMIO size of the device.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>

Message-Id: <20200622140620.17229-3-eric.auger@redhat.com>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-06-24 17:18:28 -04:00
Eric Auger
80bde69353 arm/acpi: TPM2 ACPI table support
Add a TPM2 ACPI table if a TPM2.0 sysbus device has been
dynamically instantiated.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

Message-Id: <20200601095737.32671-4-eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-06-09 12:46:45 -04:00
Vishal Verma
c3b0cf6e7d hw/acpi/nvdimm: add a helper to augment SRAT generation
NVDIMMs can belong to their own proximity domains, as described by the
NFIT. In such cases, the SRAT needs to have Memory Affinity structures
in the SRAT for these NVDIMMs, otherwise Linux doesn't populate node
data structures properly during NUMA initialization. See the following
for an example failure case.

https://lore.kernel.org/linux-nvdimm/20200416225438.15208-1-vishal.l.verma@intel.com/

Introduce a new helper, nvdimm_build_srat(), and call it for both the
i386 and arm versions of 'build_srat()' to augment the SRAT with
memory affinity information for NVDIMMs.

The relevant command line options to exercise this are below. Nodes 0-1
contain CPUs and regular memory, and nodes 2-3 are the NVDIMM address
space.

    -object memory-backend-ram,id=mem0,size=2048M
    -numa node,nodeid=0,memdev=mem0,
    -numa cpu,node-id=0,socket-id=0
    -object memory-backend-ram,id=mem1,size=2048M
    -numa node,nodeid=1,memdev=mem1,
    -numa cpu,node-id=1,socket-id=1
    -numa node,nodeid=2,
    -object memory-backend-file,id=nvmem0,share,mem-path=nvdimm-0,size=16384M,align=1G
    -device nvdimm,memdev=nvmem0,id=nv0,label-size=2M,node=2
    -numa node,nodeid=3,
    -object memory-backend-file,id=nvmem1,share,mem-path=nvdimm-1,size=16384M,align=1G
    -device nvdimm,memdev=nvmem1,id=nv1,label-size=2M,node=3

Cc: Jingqi Liu <jingqi.liu@intel.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jingqi Liu <jingqi.liu@intel.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Message-Id: <20200606000911.9896-3-vishal.l.verma@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-06-09 11:17:59 -04:00
Dongjiu Geng
a08a64627b ACPI: Record the Generic Error Status Block address
Record the GHEB address via fw_cfg file, when recording
a error to CPER, it will use this address to find out
Generic Error Data Entries and write the error.

In order to avoid migration failure, make hardware
error table address to a part of GED device instead
of global variable, then this address will be migrated
to target QEMU.

Acked-by: Xiang Zheng <zhengxiang9@huawei.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200512030609.19593-7-gengdongjiu@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-05-14 15:03:09 +01:00
Dongjiu Geng
205cc75dee ACPI: Build Hardware Error Source Table
This patch builds Hardware Error Source Table(HEST) via fw_cfg blobs.
Now it only supports ARMv8 SEA, a type of Generic Hardware Error
Source version 2(GHESv2) error source. Afterwards, we can extend
the supported types if needed. For the CPER section, currently it
is memory section because kernel mainly wants userspace to handle
the memory errors.

This patch follows the spec ACPI 6.2 to build the Hardware Error
Source table. For more detailed information, please refer to
document: docs/specs/acpi_hest_ghes.rst

build_ghes_hw_error_notification() helper will help to add Hardware
Error Notification to ACPI tables without using packed C structures
and avoid endianness issues as API doesn't need explicit conversion.

Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200512030609.19593-6-gengdongjiu@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-05-14 15:03:09 +01:00
Dongjiu Geng
aa16508f1d ACPI: Build related register address fields via hardware error fw_cfg blob
This patch builds error_block_address and read_ack_register fields
in hardware errors table , the error_block_address points to Generic
Error Status Block(GESB) via bios_linker. The max size for one GESB
is 1kb, For more detailed information, please refer to
document: docs/specs/acpi_hest_ghes.rst

Now we only support one Error source, if necessary, we can extend to
support more.

Suggested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200512030609.19593-5-gengdongjiu@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-05-14 15:03:09 +01:00
Kwangwoo Lee
b5a60bee74 hw/arm/virt: Add nvdimm hot-plug infrastructure
This adds support to init nvdimm acpi state and build nvdimm acpi tables.
Please note nvdimm_support is not yet enabled.

Signed-off-by: Kwangwoo Lee <kwangwoo.lee@sk.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200421125934.14952-4-shameerali.kolothum.thodi@huawei.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-05-04 10:25:02 -04:00
Shameer Kolothum
bac78f9c69 acpi: Use macro for table-loader file name
Use macro for "etc/table-loader" and move it to the header
file similar to ACPI_BUILD_TABLE_FILE/ACPI_BUILD_RSDP_FILE etc.

Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20200403101827.30664-2-shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2020-04-13 06:55:54 -04:00
Gerd Hoffmann
17e89077b7 acpi: add acpi=OnOffAuto machine property to x86 and arm virt
Remove the global acpi_enabled bool and replace it with an
acpi OnOffAuto machine property.

qemu throws an error now if you use -no-acpi while the machine
type you are using doesn't support acpi in the first place.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20200320100136.11717-1-kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-03-29 09:52:13 -04:00
Heyi Guo
b43bd40ba2 arm/acpi: simplify the description of PCI _CRS
The original code defines a named object for the resource template but
then returns the resource template object itself; the resulted output
is like below:

Method (_CRS, 0, NotSerialized)  // _CRS: Current Resource Settings
{
    Name (RBUF, ResourceTemplate ()
    {
        WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
            0x0000,             // Granularity
            0x0000,             // Range Minimum
            0x00FF,             // Range Maximum
            0x0000,             // Translation Offset
            0x0100,             // Length
            ,, )
        ......
    })
    Return (ResourceTemplate ()
    {
        WordBusNumber (ResourceProducer, MinFixed, MaxFixed, PosDecode,
            0x0000,             // Granularity
            0x0000,             // Range Minimum
            0x00FF,             // Range Maximum
            0x0000,             // Translation Offset
            0x0100,             // Length
            ,, )
        ......
    })
}

So the named object "RBUF" is actually useless. The more natural way
is to return RBUF instead, or simply drop RBUF definition.

Choose the latter one to simplify the code.

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20200204014325.16279-7-guoheyi@huawei.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-02-13 14:14:53 +00:00