From 689990598a710519eba37e4eb4d8bdebac1aa562 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Date: Mon, 6 Nov 2017 19:39:02 +0100 Subject: tpm-be: call request_completed() out of thread MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Lift from the backend implementation the responsability to call the request_completed() callback outside of thread context. This also simplify frontend/interface work, as they no longer need to care whether the callback is called from a different thread. Signed-off-by: Marc-André Lureau Reviewed-by: Stefan Berger Signed-off-by: Stefan Berger --- hw/tpm/tpm_emulator.c | 2 -- hw/tpm/tpm_passthrough.c | 3 --- hw/tpm/tpm_tis.c | 34 ++++++++++++---------------------- 3 files changed, 12 insertions(+), 27 deletions(-) (limited to 'hw') diff --git a/hw/tpm/tpm_emulator.c b/hw/tpm/tpm_emulator.c index 5f88975c25..47f37d6cac 100644 --- a/hw/tpm/tpm_emulator.c +++ b/hw/tpm/tpm_emulator.c @@ -186,7 +186,6 @@ static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number, static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd) { TPMEmulator *tpm_emu = TPM_EMULATOR(tb); - TPMIfClass *tic = TPM_IF_GET_CLASS(tb->tpmif); Error *err = NULL; DPRINTF("processing TPM command"); @@ -201,7 +200,6 @@ static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd) goto error; } - tic->request_completed(tb->tpmif); return; error: diff --git a/hw/tpm/tpm_passthrough.c b/hw/tpm/tpm_passthrough.c index 2ad74badca..8c002e4da6 100644 --- a/hw/tpm/tpm_passthrough.c +++ b/hw/tpm/tpm_passthrough.c @@ -139,14 +139,11 @@ err_exit: static void tpm_passthrough_handle_request(TPMBackend *tb, TPMBackendCmd *cmd) { TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); - TPMIfClass *tic = TPM_IF_GET_CLASS(tb->tpmif); DPRINTF("tpm_passthrough: processing command %p\n", cmd); tpm_passthrough_unix_tx_bufs(tpm_pt, cmd->in, cmd->in_len, cmd->out, cmd->out_len, &cmd->selftest_done); - - tic->request_completed(tb->tpmif); } static void tpm_passthrough_reset(TPMBackend *tb) diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index 4670287f82..95d3afca1d 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -76,7 +76,6 @@ typedef struct TPMState { ISADevice busdev; MemoryRegion mmio; - QEMUBH *bh; uint32_t offset; uint8_t buf[TPM_TIS_BUFFER_MAX]; @@ -410,10 +409,20 @@ static void tpm_tis_prep_abort(TPMState *s, uint8_t locty, uint8_t newlocty) tpm_tis_abort(s, locty); } -static void tpm_tis_receive_bh(void *opaque) +/* + * Callback from the TPM to indicate that the response was received. + */ +static void tpm_tis_request_completed(TPMIf *ti) { - TPMState *s = opaque; + TPMState *s = TPM(ti); uint8_t locty = s->cmd.locty; + uint8_t l; + + if (s->cmd.selftest_done) { + for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) { + s->loc[locty].sts |= TPM_TIS_STS_SELFTEST_DONE; + } + } tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE); @@ -431,23 +440,6 @@ static void tpm_tis_receive_bh(void *opaque) TPM_TIS_INT_DATA_AVAILABLE | TPM_TIS_INT_STS_VALID); } -static void tpm_tis_request_completed(TPMIf *ti) -{ - TPMState *s = TPM(ti); - - bool is_selftest_done = s->cmd.selftest_done; - uint8_t locty = s->cmd.locty; - uint8_t l; - - if (is_selftest_done) { - for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) { - s->loc[locty].sts |= TPM_TIS_STS_SELFTEST_DONE; - } - } - - qemu_bh_schedule(s->bh); -} - /* * Read a byte of response data */ @@ -1094,8 +1086,6 @@ static void tpm_tis_realizefn(DeviceState *dev, Error **errp) return; } - s->bh = qemu_bh_new(tpm_tis_receive_bh, s); - isa_init_irq(&s->busdev, &s->irq, s->irq_num); memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)), -- cgit v1.2.3