diff options
Diffstat (limited to 'hw/tpm')
| -rw-r--r-- | hw/tpm/tpm_emulator.c | 17 | ||||
| -rw-r--r-- | hw/tpm/tpm_tis.c | 130 | ||||
| -rw-r--r-- | hw/tpm/tpm_util.c | 7 | ||||
| -rw-r--r-- | hw/tpm/tpm_util.h | 7 |
4 files changed, 73 insertions, 88 deletions
diff --git a/hw/tpm/tpm_emulator.c b/hw/tpm/tpm_emulator.c index 38b6f175a1..35c78de5a9 100644 --- a/hw/tpm/tpm_emulator.c +++ b/hw/tpm/tpm_emulator.c @@ -72,6 +72,9 @@ typedef struct TPMEmulator { Error *migration_blocker; QemuMutex mutex; + + unsigned int established_flag:1; + unsigned int established_flag_cached:1; } TPMEmulator; @@ -349,16 +352,22 @@ static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb) TPMEmulator *tpm_emu = TPM_EMULATOR(tb); ptm_est est; - DPRINTF("%s", __func__); + if (tpm_emu->established_flag_cached) { + return tpm_emu->established_flag; + } + if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_TPMESTABLISHED, &est, 0, sizeof(est)) < 0) { error_report("tpm-emulator: Could not get the TPM established flag: %s", strerror(errno)); return false; } - DPRINTF("established flag: %0x", est.u.resp.bit); + DPRINTF("got established flag: %0x", est.u.resp.bit); + + tpm_emu->established_flag_cached = 1; + tpm_emu->established_flag = (est.u.resp.bit != 0); - return (est.u.resp.bit != 0); + return tpm_emu->established_flag; } static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb, @@ -389,6 +398,8 @@ static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb, return -1; } + tpm_emu->established_flag_cached = 0; + return 0; } diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index b8e811b086..561384cd86 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -48,11 +48,6 @@ typedef enum { TPM_TIS_STATE_RECEPTION, } TPMTISState; -typedef struct TPMSizedBuffer { - uint32_t size; - uint8_t *buffer; -} TPMSizedBuffer; - /* locality data -- all fields are persisted */ typedef struct TPMLocality { TPMTISState state; @@ -61,19 +56,14 @@ typedef struct TPMLocality { uint32_t iface_id; uint32_t inte; uint32_t ints; - - uint16_t w_offset; - uint16_t r_offset; - TPMSizedBuffer w_buffer; - TPMSizedBuffer r_buffer; } TPMLocality; typedef struct TPMState { ISADevice busdev; MemoryRegion mmio; - uint32_t offset; - uint8_t buf[TPM_TIS_BUFFER_MAX]; + unsigned char buffer[TPM_TIS_BUFFER_MAX]; + uint16_t rw_offset; uint8_t active_locty; uint8_t aborting_locty; @@ -215,23 +205,19 @@ static uint8_t tpm_tis_locality_from_addr(hwaddr addr) return (uint8_t)((addr >> TPM_TIS_LOCALITY_SHIFT) & 0x7); } -static uint32_t tpm_tis_get_size_from_buffer(const TPMSizedBuffer *sb) -{ - return tpm_cmd_get_size(sb->buffer); -} - -static void tpm_tis_show_buffer(const TPMSizedBuffer *sb, const char *string) +static void tpm_tis_show_buffer(const unsigned char *buffer, + size_t buffer_size, const char *string) { #ifdef DEBUG_TIS uint32_t len, i; - len = tpm_tis_get_size_from_buffer(sb); + len = MIN(tpm_cmd_get_size(buffer), buffer_size); DPRINTF("tpm_tis: %s length = %d\n", string, len); for (i = 0; i < len; i++) { if (i && !(i % 16)) { DPRINTF("\n"); } - DPRINTF("%.2X ", sb->buffer[i]); + DPRINTF("%.2X ", buffer[i]); } DPRINTF("\n"); #endif @@ -261,22 +247,21 @@ static void tpm_tis_sts_set(TPMLocality *l, uint32_t flags) */ static void tpm_tis_tpm_send(TPMState *s, uint8_t locty) { - TPMLocality *locty_data = &s->loc[locty]; - - tpm_tis_show_buffer(&s->loc[locty].w_buffer, "tpm_tis: To TPM"); + tpm_tis_show_buffer(s->buffer, s->be_buffer_size, + "tpm_tis: To TPM"); /* - * w_offset serves as length indicator for length of data; + * rw_offset serves as length indicator for length of data; * it's reset when the response comes back */ s->loc[locty].state = TPM_TIS_STATE_EXECUTION; s->cmd = (TPMBackendCmd) { .locty = locty, - .in = locty_data->w_buffer.buffer, - .in_len = locty_data->w_offset, - .out = locty_data->r_buffer.buffer, - .out_len = locty_data->r_buffer.size + .in = s->buffer, + .in_len = s->rw_offset, + .out = s->buffer, + .out_len = s->be_buffer_size, }; tpm_backend_deliver_request(s->be_driver, &s->cmd); @@ -356,8 +341,7 @@ static void tpm_tis_new_active_locality(TPMState *s, uint8_t new_active_locty) /* abort -- this function switches the locality */ static void tpm_tis_abort(TPMState *s, uint8_t locty) { - s->loc[locty].r_offset = 0; - s->loc[locty].w_offset = 0; + s->rw_offset = 0; DPRINTF("tpm_tis: tis_abort: new active locality is %d\n", s->next_locty); @@ -424,10 +408,10 @@ static void tpm_tis_request_completed(TPMIf *ti) tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE); s->loc[locty].state = TPM_TIS_STATE_COMPLETION; - s->loc[locty].r_offset = 0; - s->loc[locty].w_offset = 0; + s->rw_offset = 0; - tpm_tis_show_buffer(&s->loc[locty].r_buffer, "tpm_tis: From TPM"); + tpm_tis_show_buffer(s->buffer, s->be_buffer_size, + "tpm_tis: From TPM"); if (TPM_TIS_IS_VALID_LOCTY(s->next_locty)) { tpm_tis_abort(s, locty); @@ -446,16 +430,17 @@ static uint32_t tpm_tis_data_read(TPMState *s, uint8_t locty) uint16_t len; if ((s->loc[locty].sts & TPM_TIS_STS_DATA_AVAILABLE)) { - len = tpm_tis_get_size_from_buffer(&s->loc[locty].r_buffer); + len = MIN(tpm_cmd_get_size(&s->buffer), + s->be_buffer_size); - ret = s->loc[locty].r_buffer.buffer[s->loc[locty].r_offset++]; - if (s->loc[locty].r_offset >= len) { + ret = s->buffer[s->rw_offset++]; + if (s->rw_offset >= len) { /* got last byte */ tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID); tpm_tis_raise_irq(s, locty, TPM_TIS_INT_STS_VALID); } DPRINTF("tpm_tis: tpm_tis_data_read byte 0x%02x [%d]\n", - ret, s->loc[locty].r_offset - 1); + ret, s->rw_offset - 1); } return ret; @@ -490,27 +475,15 @@ static void tpm_tis_dump_state(void *opaque, hwaddr addr) (int)tpm_tis_mmio_read(opaque, base + regs[idx], 4)); } - DPRINTF("tpm_tis: read offset : %d\n" + DPRINTF("tpm_tis: r/w offset : %d\n" "tpm_tis: result buffer : ", - s->loc[locty].r_offset); + s->rw_offset); for (idx = 0; - idx < tpm_tis_get_size_from_buffer(&s->loc[locty].r_buffer); + idx < MIN(tpm_cmd_get_size(&s->buffer), s->be_buffer_size); idx++) { DPRINTF("%c%02x%s", - s->loc[locty].r_offset == idx ? '>' : ' ', - s->loc[locty].r_buffer.buffer[idx], - ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); - } - DPRINTF("\n" - "tpm_tis: write offset : %d\n" - "tpm_tis: request buffer: ", - s->loc[locty].w_offset); - for (idx = 0; - idx < tpm_tis_get_size_from_buffer(&s->loc[locty].w_buffer); - idx++) { - DPRINTF("%c%02x%s", - s->loc[locty].w_offset == idx ? '>' : ' ', - s->loc[locty].w_buffer.buffer[idx], + s->rw_offset == idx ? '>' : ' ', + s->buffer[idx], ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); } DPRINTF("\n"); @@ -572,11 +545,11 @@ static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr, if (s->active_locty == locty) { if ((s->loc[locty].sts & TPM_TIS_STS_DATA_AVAILABLE)) { val = TPM_TIS_BURST_COUNT( - tpm_tis_get_size_from_buffer(&s->loc[locty].r_buffer) - - s->loc[locty].r_offset) | s->loc[locty].sts; + MIN(tpm_cmd_get_size(&s->buffer), + s->be_buffer_size) + - s->rw_offset) | s->loc[locty].sts; } else { - avail = s->loc[locty].w_buffer.size - - s->loc[locty].w_offset; + avail = s->be_buffer_size - s->rw_offset; /* * byte-sized reads should not return 0x00 for 0x100 * available bytes. @@ -840,8 +813,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, switch (s->loc[locty].state) { case TPM_TIS_STATE_READY: - s->loc[locty].w_offset = 0; - s->loc[locty].r_offset = 0; + s->rw_offset = 0; break; case TPM_TIS_STATE_IDLE: @@ -859,8 +831,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, break; case TPM_TIS_STATE_COMPLETION: - s->loc[locty].w_offset = 0; - s->loc[locty].r_offset = 0; + s->rw_offset = 0; /* shortcut to ready state with C/R set */ s->loc[locty].state = TPM_TIS_STATE_READY; if (!(s->loc[locty].sts & TPM_TIS_STS_COMMAND_READY)) { @@ -886,7 +857,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } else if (val == TPM_TIS_STS_RESPONSE_RETRY) { switch (s->loc[locty].state) { case TPM_TIS_STATE_COMPLETION: - s->loc[locty].r_offset = 0; + s->rw_offset = 0; tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID| TPM_TIS_STS_DATA_AVAILABLE); @@ -924,9 +895,9 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } while ((s->loc[locty].sts & TPM_TIS_STS_EXPECT) && size > 0) { - if (s->loc[locty].w_offset < s->loc[locty].w_buffer.size) { - s->loc[locty].w_buffer. - buffer[s->loc[locty].w_offset++] = (uint8_t)val; + if (s->rw_offset < s->be_buffer_size) { + s->buffer[s->rw_offset++] = + (uint8_t)val; val >>= 8; size--; } else { @@ -935,13 +906,13 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, } /* check for complete packet */ - if (s->loc[locty].w_offset > 5 && + if (s->rw_offset > 5 && (s->loc[locty].sts & TPM_TIS_STS_EXPECT)) { /* we have a packet length - see if we have all of it */ bool need_irq = !(s->loc[locty].sts & TPM_TIS_STS_VALID); - len = tpm_tis_get_size_from_buffer(&s->loc[locty].w_buffer); - if (len > s->loc[locty].w_offset) { + len = tpm_cmd_get_size(&s->buffer); + if (len > s->rw_offset) { tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_EXPECT | TPM_TIS_STS_VALID); } else { @@ -974,20 +945,11 @@ static const MemoryRegionOps tpm_tis_memory_ops = { }, }; -static int tpm_tis_do_startup_tpm(TPMState *s, uint32_t buffersize) +static int tpm_tis_do_startup_tpm(TPMState *s, size_t buffersize) { return tpm_backend_startup_tpm(s->be_driver, buffersize); } -static void tpm_tis_realloc_buffer(TPMSizedBuffer *sb, - size_t wanted_size) -{ - if (sb->size != wanted_size) { - sb->buffer = g_realloc(sb->buffer, wanted_size); - sb->size = wanted_size; - } -} - /* * Get the TPMVersion of the backend device being used */ @@ -1012,7 +974,8 @@ static void tpm_tis_reset(DeviceState *dev) int c; s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver); - s->be_buffer_size = tpm_backend_get_buffer_size(s->be_driver); + s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->be_driver), + TPM_TIS_BUFFER_MAX); tpm_backend_reset(s->be_driver); @@ -1038,13 +1001,10 @@ static void tpm_tis_reset(DeviceState *dev) s->loc[c].ints = 0; s->loc[c].state = TPM_TIS_STATE_IDLE; - s->loc[c].w_offset = 0; - tpm_tis_realloc_buffer(&s->loc[c].w_buffer, s->be_buffer_size); - s->loc[c].r_offset = 0; - tpm_tis_realloc_buffer(&s->loc[c].r_buffer, s->be_buffer_size); + s->rw_offset = 0; } - tpm_tis_do_startup_tpm(s, 0); + tpm_tis_do_startup_tpm(s, s->be_buffer_size); } static const VMStateDescription vmstate_tpm_tis = { diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c index 17cafbe6b3..747075e244 100644 --- a/hw/tpm/tpm_util.c +++ b/hw/tpm/tpm_util.c @@ -355,3 +355,10 @@ int tpm_util_get_buffer_size(int tpm_fd, TPMVersion tpm_version, return 0; } + +void tpm_sized_buffer_reset(TPMSizedBuffer *tsb) +{ + g_free(tsb->buffer); + tsb->buffer = NULL; + tsb->size = 0; +} diff --git a/hw/tpm/tpm_util.h b/hw/tpm/tpm_util.h index 2393b6bc0e..19b28474ae 100644 --- a/hw/tpm/tpm_util.h +++ b/hw/tpm/tpm_util.h @@ -42,4 +42,11 @@ int tpm_util_get_buffer_size(int tpm_fd, TPMVersion tpm_version, #define DEFINE_PROP_TPMBE(_n, _s, _f) \ DEFINE_PROP(_n, _s, _f, qdev_prop_tpm, TPMBackend *) +typedef struct TPMSizedBuffer { + uint32_t size; + uint8_t *buffer; +} TPMSizedBuffer; + +void tpm_sized_buffer_reset(TPMSizedBuffer *tsb); + #endif /* TPM_TPM_UTIL_H */ |