Re: [Qemu-devel] [PATCH v4 1/5] tpm: add a "ppi" boolean property

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

On 06/21/2018 07:55 AM, Marc-André Lureau wrote:
> The following patches implement the TPM Physical Presence Interface,
> and makes use of new memory region and fw_cfg entries. Enable it by
> default on >2.12 machine type.
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> ---
>   include/hw/compat.h | 10 ++++++++++
>   hw/tpm/tpm_crb.c    |  3 +++
>   hw/tpm/tpm_tis.c    |  3 +++
>   3 files changed, 16 insertions(+)
>
> diff --git a/include/hw/compat.h b/include/hw/compat.h
> index 563908b874..dac847548b 100644
> --- a/include/hw/compat.h
> +++ b/include/hw/compat.h
> @@ -2,6 +2,16 @@
>   #define HW_COMPAT_H
>   
>   #define HW_COMPAT_2_12 \
> +    {\
> +        .driver   = "tpm-crb",\
> +        .property = "ppi",\
> +        .value    = "false",\
> +    },\
> +    {\
> +        .driver   = "tpm-tis",\
> +        .property = "ppi",\
> +        .value    = "false",\
> +    },\
>       {\
>           .driver   = "migration",\
>           .property = "decompress-error-check",\
> diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c
> index a92dd50437..d5b0ac5920 100644
> --- a/hw/tpm/tpm_crb.c
> +++ b/hw/tpm/tpm_crb.c
> @@ -41,6 +41,8 @@ typedef struct CRBState {
>       MemoryRegion cmdmem;
>   
>       size_t be_buffer_size;
> +
> +    bool ppi_enabled;
>   } CRBState;
>   
>   #define CRB(obj) OBJECT_CHECK(CRBState, (obj), TYPE_TPM_CRB)
> @@ -221,6 +223,7 @@ static const VMStateDescription vmstate_tpm_crb = {
>   
>   static Property tpm_crb_properties[] = {
>       DEFINE_PROP_TPMBE("tpmdev", CRBState, tpmbe),
> +    DEFINE_PROP_BOOL("ppi", CRBState, ppi_enabled, true),
>       DEFINE_PROP_END_OF_LIST(),
>   };

Wouldn't we have to bump up the version of teh VMStateDescription?

    Stefan
>   
> diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
> index 12f5c9a759..d9ddf9b723 100644
> --- a/hw/tpm/tpm_tis.c
> +++ b/hw/tpm/tpm_tis.c
> @@ -81,6 +81,8 @@ typedef struct TPMState {
>       TPMVersion be_tpm_version;
>   
>       size_t be_buffer_size;
> +
> +    bool ppi_enabled;
>   } TPMState;
>   
>   #define TPM(obj) OBJECT_CHECK(TPMState, (obj), TYPE_TPM_TIS)
> @@ -950,6 +952,7 @@ static const VMStateDescription vmstate_tpm_tis = {
>   static Property tpm_tis_properties[] = {
>       DEFINE_PROP_UINT32("irq", TPMState, irq_num, TPM_TIS_IRQ),
>       DEFINE_PROP_TPMBE("tpmdev", TPMState, be_driver),
> +    DEFINE_PROP_BOOL("ppi", TPMState, ppi_enabled, true),
>       DEFINE_PROP_END_OF_LIST(),
>   };
>