From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40044) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e8Dee-0002f6-UA for qemu-devel@nongnu.org; Fri, 27 Oct 2017 19:03:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e8DeY-0003wT-S9 for qemu-devel@nongnu.org; Fri, 27 Oct 2017 19:03:08 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56922 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e8DeY-0003vh-Jo for qemu-devel@nongnu.org; Fri, 27 Oct 2017 19:03:02 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v9RMwlUk034069 for ; Fri, 27 Oct 2017 19:02:56 -0400 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0b-001b2d01.pphosted.com with ESMTP id 2dv8bdnvvm-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 27 Oct 2017 19:02:55 -0400 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 27 Oct 2017 19:02:55 -0400 From: Stefan Berger Date: Fri, 27 Oct 2017 19:02:37 -0400 In-Reply-To: <1509145361-11218-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1509145361-11218-1-git-send-email-stefanb@linux.vnet.ibm.com> Message-Id: <1509145361-11218-4-git-send-email-stefanb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 3/7] tpm: implement tpm_backend_wait_cmd_completed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: amarnath.valluri@intel.com, marcandre.lureau@gmail.com, Stefan Berger Implement tpm_backend_wait_cmd_completed to synchronize with the backend (thread) for the completion of a command. Signed-off-by: Stefan Berger --- backends/tpm.c | 10 ++++++++++ include/sysemu/tpm_backend.h | 8 ++++++++ 2 files changed, 18 insertions(+) diff --git a/backends/tpm.c b/backends/tpm.c index 2f60166..6e26832 100644 --- a/backends/tpm.c +++ b/backends/tpm.c @@ -28,6 +28,16 @@ void tpm_backend_cmd_completed(TPMBackend *s) qemu_mutex_unlock(&s->state_lock); } +void tpm_backend_wait_cmd_completed(TPMBackend *s) +{ + qemu_mutex_lock(&s->state_lock); + + if (s->tpm_busy) { + qemu_cond_wait(&s->cmd_complete, &s->state_lock); + } + qemu_mutex_unlock(&s->state_lock); +} + static void tpm_backend_request_completed_bh(void *opaque) { TPMBackend *s = TPM_BACKEND(opaque); diff --git a/include/sysemu/tpm_backend.h b/include/sysemu/tpm_backend.h index e08c51d..8c271f4 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -207,6 +207,14 @@ TPMInfo *tpm_backend_query_tpm(TPMBackend *s); */ void tpm_backend_cmd_completed(TPMBackend *s); +/** + * tpm_backend_wait_cmd_completed: + * @s: the backend + * + * Wait the backend to not be busy anymore + */ +void tpm_backend_wait_cmd_completed(TPMBackend *s); + TPMBackend *qemu_find_tpm_be(const char *id); void tpm_register_model(enum TpmModel model); -- 2.5.5