Re: [RFC PATCH V1 1/3] acpi: Eliminate all TPM related code if CONFIG_TPM is not set

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 6/12/21 3:21 AM, Stefan Berger wrote:
> Cc: M: Michael S. Tsirkin <mst@redhat.com>
> Cc: Igor Mammedov <imammedo@redhat.com>
> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> ---
>  hw/acpi/aml-build.c      |  2 ++
>  hw/arm/virt-acpi-build.c |  2 ++
>  hw/i386/acpi-build.c     | 20 ++++++++++++++++++++
>  include/hw/acpi/tpm.h    |  4 ++++
>  stubs/tpm.c              |  4 ----
>  5 files changed, 28 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index f0035d2b4a..d5103e6d7b 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -2044,6 +2044,7 @@ build_hdr:
>                   "FACP", tbl->len - fadt_start, f->rev, oem_id, oem_table_id);
>  }
>  
> +#ifdef CONFIG_TPM
>  /*
>   * build_tpm2 - Build the TPM2 table as specified in
>   * table 7: TCG Hardware Interface Description Table Format for TPM 2.0
> @@ -2101,6 +2102,7 @@ void build_tpm2(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
>                   (void *)(table_data->data + tpm2_start),
>                   "TPM2", table_data->len - tpm2_start, 4, oem_id, oem_table_id);
>  }
> +#endif

This makes the ARM virt machine build to fail for missing
the build_tpm2() symbol.

You probably need to split the patch in 2 and rearrange the
series:

1/ hw/i386    (current 1)
2/ hw/arm     (current 2)
3/ hw/acpi    (current 1)
4/ sysemu/tpm (current 3)

> diff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h
> index 1a2a57a21f..559ba6906c 100644
> --- a/include/hw/acpi/tpm.h
> +++ b/include/hw/acpi/tpm.h
> @@ -21,6 +21,8 @@
>  #include "hw/acpi/aml-build.h"
>  #include "sysemu/tpm.h"
>  
> +#ifdef CONFIG_TPM
> +
>  #define TPM_TIS_ADDR_BASE           0xFED40000
>  #define TPM_TIS_ADDR_SIZE           0x5000
>  
> @@ -209,4 +211,6 @@ REG32(CRB_DATA_BUFFER, 0x80)
>  
>  void tpm_build_ppi_acpi(TPMIf *tpm, Aml *dev);
>  
> +#endif /* CONFIG_TPM */
> +
>  #endif /* HW_ACPI_TPM_H */