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tpm: tpm_emulator: get and set buffer size of device

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Convert the tpm_emulator backend to get the current buffer size
of the external device and set it to the buffer size that the
frontend (TIS) requests.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
This commit is contained in:
Stefan Berger 2017-11-04 19:57:15 -04:00
parent abc5cda097
commit 9375c44fdf
5 changed files with 111 additions and 12 deletions
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6
include/sysemu/tpm_backend.h
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@ -66,7 +66,7 @@ struct TPMBackendClass {
TPMBackend *(*create)(QemuOpts *opts);
/* start up the TPM on the backend - optional */
int (*startup_tpm)(TPMBackend *t);
int (*startup_tpm)(TPMBackend *t, size_t buffersize);
/* optional */
void (*reset)(TPMBackend *t);
@ -112,10 +112,12 @@ int tpm_backend_init(TPMBackend *s, TPMIf *tpmif, Error **errp);
/**
* tpm_backend_startup_tpm:
* @s: the backend whose TPM support is to be started
* @buffersize: the buffer size the TPM is supposed to use,
* 0 to leave it as-is
*
* Returns 0 on success.
*/
int tpm_backend_startup_tpm(TPMBackend *s);
int tpm_backend_startup_tpm(TPMBackend *s, size_t buffersize);
/**
* tpm_backend_had_startup_error: