/* prepare aborting current command */
static void tpm_tis_prep_abort(TPMState *s, uint8_t locty, uint8_t newlocty)
{
TPMTISEmuState *tis = &s->s.tis;
uint8_t busy_locty;
tis->aborting_locty = locty;
tis->next_locty = newlocty; /* locality after successful abort */
/*
* only abort a command using an interrupt if currently executing
* a command AND if there's a valid connection to the vTPM.
*/
for (busy_locty = 0; busy_locty < TPM_TIS_NUM_LOCALITIES; busy_locty++) {
if (tis->loc[busy_locty].state == TPM_TIS_STATE_EXECUTION) {
/*
* request the backend to cancel. Some backends may not
* support it
*/
tpm_backend_cancel_cmd(s->be_driver);
return;
}
}
tpm_tis_abort(s, locty);
}
static void tpm_tis_receive_bh(void *opaque)
{
TPMState *s = opaque;
TPMTISEmuState *tis = &s->s.tis;
uint8_t locty = s->locty_number;
tis->loc[locty].sts = TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE;
tis->loc[locty].state = TPM_TIS_STATE_COMPLETION;
tis->loc[locty].r_offset = 0;
tis->loc[locty].w_offset = 0;
if (TPM_TIS_IS_VALID_LOCTY(tis->next_locty)) {
tpm_tis_abort(s, locty);
}
#ifndef RAISE_STS_IRQ
tpm_tis_raise_irq(s, locty, TPM_TIS_INT_DATA_AVAILABLE);
#else
tpm_tis_raise_irq(s, locty,
TPM_TIS_INT_DATA_AVAILABLE | TPM_TIS_INT_STS_VALID);
#endif
}
