From 1af3d63ea3b0d18a6f17e4587f48529cd4fb26f0 Mon Sep 17 00:00:00 2001 From: Stefan Berger Date: Thu, 9 Nov 2017 19:24:02 -0500 Subject: [PATCH] tpm_tis: limit size of buffer from backend MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is a preparatory patch for the subsequent ones where we get rid of the flexibility of supporting any kind of buffer size that the backend may support. We keep the size at 4096, which is also the size the external emulator supports. So, limit the size of the buffer we can support and pass it back to the backend. Signed-off-by: Stefan Berger Reviewed-by: Marc-André Lureau --- hw/tpm/tpm_tis.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index ac5f51f108..a6e2f6eb6c 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -1012,7 +1012,8 @@ 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); @@ -1044,7 +1045,7 @@ static void tpm_tis_reset(DeviceState *dev) tpm_tis_realloc_buffer(&s->loc[c].r_buffer, s->be_buffer_size); } - tpm_tis_do_startup_tpm(s, 0); + tpm_tis_do_startup_tpm(s, s->be_buffer_size); } static const VMStateDescription vmstate_tpm_tis = {