Re: [PATCH v2 01/12] hw/arm/virt-acpi-build.c: Migrate fw_cfg creation to common location

[Alistair Francis]

On Fri, Aug 25, 2023 at 12:30 AM Sunil V L <sunilvl@ventanamicro.com> wrote:
>
> RISC-V also needs to use the same code to create fw_cfg in DSDT. So, avoid
> code duplication by moving the code in arm and riscv to a device specific
> file.
>
> Suggested-by: Igor Mammedov <imammedo@redhat.com>
> Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  hw/arm/virt-acpi-build.c       | 19 ++-----------------
>  hw/nvram/fw_cfg-acpi.c         | 17 +++++++++++++++++
>  hw/nvram/meson.build           |  1 +
>  hw/riscv/virt-acpi-build.c     | 19 ++-----------------
>  include/hw/nvram/fw_cfg_acpi.h |  9 +++++++++
>  5 files changed, 31 insertions(+), 34 deletions(-)
>  create mode 100644 hw/nvram/fw_cfg-acpi.c
>  create mode 100644 include/hw/nvram/fw_cfg_acpi.h
>
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 6b674231c2..b8e725d953 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -35,7 +35,7 @@
>  #include "target/arm/cpu.h"
>  #include "hw/acpi/acpi-defs.h"
>  #include "hw/acpi/acpi.h"
> -#include "hw/nvram/fw_cfg.h"
> +#include "hw/nvram/fw_cfg_acpi.h"
>  #include "hw/acpi/bios-linker-loader.h"
>  #include "hw/acpi/aml-build.h"
>  #include "hw/acpi/utils.h"
> @@ -94,21 +94,6 @@ static void acpi_dsdt_add_uart(Aml *scope, const 
> MemMapEntry *uart_memmap,
>      aml_append(scope, dev);
>  }
>
> -static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry 
> *fw_cfg_memmap)
> -{
> -    Aml *dev = aml_device("FWCF");
> -    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
> -    /* device present, functioning, decoding, not shown in UI */
> -    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
> -    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
> -
> -    Aml *crs = aml_resource_template();
> -    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
> -                                       fw_cfg_memmap->size, AML_READ_WRITE));
> -    aml_append(dev, aml_name_decl("_CRS", crs));
> -    aml_append(scope, dev);
> -}
> -
>  static void acpi_dsdt_add_flash(Aml *scope, const MemMapEntry *flash_memmap)
>  {
>      Aml *dev, *crs;
> @@ -864,7 +849,7 @@ build_dsdt(GArray *table_data, BIOSLinker *linker, 
> VirtMachineState *vms)
>      if (vmc->acpi_expose_flash) {
>          acpi_dsdt_add_flash(scope, &memmap[VIRT_FLASH]);
>      }
> -    acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
> +    fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
>      acpi_dsdt_add_virtio(scope, &memmap[VIRT_MMIO],
>                      (irqmap[VIRT_MMIO] + ARM_SPI_BASE), 
> NUM_VIRTIO_TRANSPORTS);
>      acpi_dsdt_add_pci(scope, memmap, irqmap[VIRT_PCIE] + ARM_SPI_BASE, vms);
> diff --git a/hw/nvram/fw_cfg-acpi.c b/hw/nvram/fw_cfg-acpi.c
> new file mode 100644
> index 0000000000..4eeb81bc36
> --- /dev/null
> +++ b/hw/nvram/fw_cfg-acpi.c
> @@ -0,0 +1,17 @@
> +#include "hw/nvram/fw_cfg_acpi.h"
> +#include "hw/acpi/aml-build.h"
> +
> +void fw_cfg_acpi_dsdt_add(Aml *scope, const MemMapEntry *fw_cfg_memmap)
> +{
> +    Aml *dev = aml_device("FWCF");
> +    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
> +    /* device present, functioning, decoding, not shown in UI */
> +    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
> +    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
> +
> +    Aml *crs = aml_resource_template();
> +    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
> +                                       fw_cfg_memmap->size, AML_READ_WRITE));
> +    aml_append(dev, aml_name_decl("_CRS", crs));
> +    aml_append(scope, dev);
> +}
> diff --git a/hw/nvram/meson.build b/hw/nvram/meson.build
> index 988dff6f8e..69e6df5aac 100644
> --- a/hw/nvram/meson.build
> +++ b/hw/nvram/meson.build
> @@ -21,3 +21,4 @@ system_ss.add(when: 'CONFIG_XLNX_EFUSE_ZYNQMP', if_true: 
> files(
>  system_ss.add(when: 'CONFIG_XLNX_BBRAM', if_true: files('xlnx-bbram.c'))
>
>  specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_nvram.c'))
> +specific_ss.add(when: 'CONFIG_ACPI', if_true: files('fw_cfg-acpi.c'))
> diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
> index 7331248f59..d8772c2821 100644
> --- a/hw/riscv/virt-acpi-build.c
> +++ b/hw/riscv/virt-acpi-build.c
> @@ -28,6 +28,7 @@
>  #include "hw/acpi/acpi.h"
>  #include "hw/acpi/aml-build.h"
>  #include "hw/acpi/utils.h"
> +#include "hw/nvram/fw_cfg_acpi.h"
>  #include "qapi/error.h"
>  #include "qemu/error-report.h"
>  #include "sysemu/reset.h"
> @@ -97,22 +98,6 @@ static void acpi_dsdt_add_cpus(Aml *scope, RISCVVirtState 
> *s)
>      }
>  }
>
> -static void acpi_dsdt_add_fw_cfg(Aml *scope, const MemMapEntry 
> *fw_cfg_memmap)
> -{
> -    Aml *dev = aml_device("FWCF");
> -    aml_append(dev, aml_name_decl("_HID", aml_string("QEMU0002")));
> -
> -    /* device present, functioning, decoding, not shown in UI */
> -    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
> -    aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
> -
> -    Aml *crs = aml_resource_template();
> -    aml_append(crs, aml_memory32_fixed(fw_cfg_memmap->base,
> -                                       fw_cfg_memmap->size, AML_READ_WRITE));
> -    aml_append(dev, aml_name_decl("_CRS", crs));
> -    aml_append(scope, dev);
> -}
> -
>  /* RHCT Node[N] starts at offset 56 */
>  #define RHCT_NODE_ARRAY_OFFSET 56
>
> @@ -226,7 +211,7 @@ static void build_dsdt(GArray *table_data,
>      scope = aml_scope("\\_SB");
>      acpi_dsdt_add_cpus(scope, s);
>
> -    acpi_dsdt_add_fw_cfg(scope, &memmap[VIRT_FW_CFG]);
> +    fw_cfg_acpi_dsdt_add(scope, &memmap[VIRT_FW_CFG]);
>
>      aml_append(dsdt, scope);
>
> diff --git a/include/hw/nvram/fw_cfg_acpi.h b/include/hw/nvram/fw_cfg_acpi.h
> new file mode 100644
> index 0000000000..6e2c5f04b7
> --- /dev/null
> +++ b/include/hw/nvram/fw_cfg_acpi.h
> @@ -0,0 +1,9 @@
> +#ifndef FW_CFG_ACPI_H
> +#define FW_CFG_ACPI_H
> +
> +#include "qemu/osdep.h"
> +#include "exec/hwaddr.h"
> +
> +void fw_cfg_acpi_dsdt_add(Aml *scope, const MemMapEntry *fw_cfg_memmap);
> +
> +#endif
> --
> 2.39.2
>
>