On Fri, Nov 10, 2017 at 3:11 PM, Stefan Berger <[email protected]> wrote: > Remove usage of TPMSizeBuffer. The size of the buffers is limited now > by s->be_buffer_size, which is the size of the buffer the TIS has > negotiated with the backend. > > Signed-off-by: Stefan Berger <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]> > --- > hw/tpm/tpm_tis.c | 68 > ++++++++++++++++++++++++-------------------------------- > 1 file changed, 29 insertions(+), 39 deletions(-) > > diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c > index 90c6df2..ddfcfc9 100644 > --- a/hw/tpm/tpm_tis.c > +++ b/hw/tpm/tpm_tis.c > @@ -64,8 +64,8 @@ typedef struct TPMLocality { > > uint16_t w_offset; > uint16_t r_offset; > - TPMSizedBuffer w_buffer; > - TPMSizedBuffer r_buffer; > + unsigned char w_buffer[TPM_TIS_BUFFER_MAX]; > + unsigned char r_buffer[TPM_TIS_BUFFER_MAX]; > } TPMLocality; > > typedef struct TPMState { > @@ -215,23 +215,19 @@ 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 > @@ -263,7 +259,8 @@ 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->loc[locty].w_buffer, s->be_buffer_size, > + "tpm_tis: To TPM"); > > /* > * w_offset serves as length indicator for length of data; > @@ -273,10 +270,10 @@ static void tpm_tis_tpm_send(TPMState *s, uint8_t locty) > > s->cmd = (TPMBackendCmd) { > .locty = locty, > - .in = locty_data->w_buffer.buffer, > + .in = locty_data->w_buffer, > .in_len = locty_data->w_offset, > - .out = locty_data->r_buffer.buffer, > - .out_len = locty_data->r_buffer.size > + .out = locty_data->r_buffer, > + .out_len = s->be_buffer_size, > }; > > tpm_backend_deliver_request(s->be_driver, &s->cmd); > @@ -427,7 +424,8 @@ static void tpm_tis_request_completed(TPMIf *ti) > s->loc[locty].r_offset = 0; > s->loc[locty].w_offset = 0; > > - tpm_tis_show_buffer(&s->loc[locty].r_buffer, "tpm_tis: From TPM"); > + tpm_tis_show_buffer(s->loc[locty].r_buffer, s->be_buffer_size, > + "tpm_tis: From TPM"); > > if (TPM_TIS_IS_VALID_LOCTY(s->next_locty)) { > tpm_tis_abort(s, locty); > @@ -446,9 +444,10 @@ 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->loc[locty].r_buffer), > + s->be_buffer_size); > > - ret = s->loc[locty].r_buffer.buffer[s->loc[locty].r_offset++]; > + ret = s->loc[locty].r_buffer[s->loc[locty].r_offset++]; > if (s->loc[locty].r_offset >= len) { > /* got last byte */ > tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID); > @@ -494,11 +493,12 @@ static void tpm_tis_dump_state(void *opaque, hwaddr > addr) > "tpm_tis: result buffer : ", > s->loc[locty].r_offset); > for (idx = 0; > - idx < tpm_tis_get_size_from_buffer(&s->loc[locty].r_buffer); > + idx < MIN(tpm_cmd_get_size(&s->loc[locty].r_buffer), > + s->be_buffer_size); > idx++) { > DPRINTF("%c%02x%s", > s->loc[locty].r_offset == idx ? '>' : ' ', > - s->loc[locty].r_buffer.buffer[idx], > + s->loc[locty].r_buffer[idx], > ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); > } > DPRINTF("\n" > @@ -506,11 +506,12 @@ static void tpm_tis_dump_state(void *opaque, hwaddr > addr) > "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 < MIN(tpm_cmd_get_size(s->loc[locty].w_buffer), > + s->be_buffer_size); > idx++) { > DPRINTF("%c%02x%s", > s->loc[locty].w_offset == idx ? '>' : ' ', > - s->loc[locty].w_buffer.buffer[idx], > + s->loc[locty].w_buffer[idx], > ((idx & 0xf) == 0xf) ? "\ntpm_tis: " : ""); > } > DPRINTF("\n"); > @@ -572,11 +573,11 @@ 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) > + MIN(tpm_cmd_get_size(&s->loc[locty].r_buffer), > + s->be_buffer_size) > - s->loc[locty].r_offset) | s->loc[locty].sts; > } else { > - avail = s->loc[locty].w_buffer.size > - - s->loc[locty].w_offset; > + avail = s->be_buffer_size - s->loc[locty].w_offset; > /* > * byte-sized reads should not return 0x00 for 0x100 > * available bytes. > @@ -924,9 +925,9 @@ 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->loc[locty].w_offset < s->be_buffer_size) { > + s->loc[locty].w_buffer[s->loc[locty].w_offset++] = > + (uint8_t)val; > val >>= 8; > size--; > } else { > @@ -940,7 +941,7 @@ static void tpm_tis_mmio_write(void *opaque, hwaddr addr, > /* 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); > + len = tpm_cmd_get_size(&s->loc[locty].w_buffer); > if (len > s->loc[locty].w_offset) { > tpm_tis_sts_set(&s->loc[locty], > TPM_TIS_STS_EXPECT | TPM_TIS_STS_VALID); > @@ -979,15 +980,6 @@ 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 > */ > @@ -1036,9 +1028,7 @@ static void tpm_tis_reset(DeviceState *dev) > 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); > } > > tpm_tis_do_startup_tpm(s, s->be_buffer_size); > -- > 2.5.5 > > -- Marc-André Lureau
