From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33151) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eDA2m-00044w-UP for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:34 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eDA2f-0005FM-7z for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:28 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:54496 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 1eDA2f-0005EC-2q for qemu-devel@nongnu.org; Fri, 10 Nov 2017 09:12:21 -0500 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id vAAE9tFt076779 for ; Fri, 10 Nov 2017 09:12:20 -0500 Received: from e37.co.us.ibm.com (e37.co.us.ibm.com [32.97.110.158]) by mx0b-001b2d01.pphosted.com with ESMTP id 2e59kjkmyw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 10 Nov 2017 09:12:19 -0500 Received: from localhost by e37.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 10 Nov 2017 07:12:18 -0700 From: Stefan Berger Date: Fri, 10 Nov 2017 09:11:50 -0500 In-Reply-To: <1510323112-2207-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1510323112-2207-1-git-send-email-stefanb@linux.vnet.ibm.com> Message-Id: <1510323112-2207-12-git-send-email-stefanb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v3 11/13] tpm: implement tpm_backend_wait_cmd_completed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, marcandre.lureau@redhat.com Cc: amarnath.valluri@intel.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 bf0e120..5e4de27 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 39598e3..1170cb9 100644 --- a/include/sysemu/tpm_backend.h +++ b/include/sysemu/tpm_backend.h @@ -220,6 +220,14 @@ 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); #endif -- 2.5.5