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Re: [Qemu-devel] [PATCH 38/42] tpm: add TPM interface to lookup TPM vers


From: Stefan Berger
Subject: Re: [Qemu-devel] [PATCH 38/42] tpm: add TPM interface to lookup TPM version
Date: Tue, 10 Oct 2017 16:43:10 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

On 10/09/2017 06:56 PM, Marc-André Lureau wrote:
Do not hardcode TPM device model to lookup version, use an interface
instead.

Signed-off-by: Marc-André Lureau <address@hidden>
---
  include/sysemu/tpm.h | 5 ++---
  hw/tpm/tpm_tis.c     | 5 +++--
  2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h
index dbd2b0cc7a..9439330cf1 100644
--- a/include/sysemu/tpm.h
+++ b/include/sysemu/tpm.h
@@ -38,6 +38,7 @@ typedef struct TPMIfClass {

      enum TpmModel model;
      void (*request_completed)(TPMIf *obj);
+    enum TPMVersion (*get_version)(TPMIf *obj);
  } TPMIfClass;

  int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
@@ -53,15 +54,13 @@ static inline TPMIf *tpm_find(void)
      return TPM_IF(obj);
  }

-TPMVersion tpm_tis_get_tpm_version(Object *obj);
-
  static inline TPMVersion tpm_get_version(TPMIf *ti)
  {
      if (!ti) {
          return TPM_VERSION_UNSPEC;
      }

-    return tpm_tis_get_tpm_version(OBJECT(ti));
+    return TPM_IF_GET_CLASS(ti)->get_version(ti);
  }

  #endif /* QEMU_TPM_H */
diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c
index 954b7b0e5d..6aac9bfe6b 100644
--- a/hw/tpm/tpm_tis.c
+++ b/hw/tpm/tpm_tis.c
@@ -989,9 +989,9 @@ static void tpm_tis_realloc_buffer(TPMSizedBuffer *sb)
  /*
   * Get the TPMVersion of the backend device being used
   */
-TPMVersion tpm_tis_get_tpm_version(Object *obj)
+static enum TPMVersion tpm_tis_get_tpm_version(TPMIf *ti)
  {
-    TPMState *s = TPM(obj);
+    TPMState *s = TPM(ti);

      return tpm_backend_get_tpm_version(s->be_driver);
  }
@@ -1097,6 +1097,7 @@ static void tpm_tis_class_init(ObjectClass *klass, void 
*data)
      dc->reset = tpm_tis_reset;
      dc->vmsd  = &vmstate_tpm_tis;
      tc->model = TPM_MODEL_TPM_TIS;
+    tc->get_version = tpm_tis_get_tpm_version;
      tc->request_completed = tpm_tis_request_completed;
  }


Reviewed-by: Stefan Berger <address@hidden>





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