From patchwork Sat Dec 16 00:20:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 13495212 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5ED72A46; Sat, 16 Dec 2023 00:21:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=quicinc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=quicinc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="bBhf+SDl" Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BG0GDF0016567; Sat, 16 Dec 2023 00:21:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= from:date:subject:mime-version:content-type :content-transfer-encoding:message-id:references:in-reply-to:to :cc; s=qcppdkim1; bh=OEEOctwZRiqnvSmFq54/UY9u6/0OSkhlKKf9mPwOG6w =; b=bBhf+SDldV7WY7ylnnV6FoIgJtYHK9ui9F3aGt+Uhub0UjTy9B7PNuTUH2+ 42UBT4BfCbhjQim18xuqpHqWt/WMRuYkXb2FDGaYdPerw4phe9D1IMSumhxJvoWa ij8r770Oub3EQEErnFtYRmwaDTUnviiMfitGrlOX/5aKMPc8bnHLDpCLg2SUqI0y uaRjeUGjXTpGfApyaltWl/EVpCWOQ0AjeSlidrL9Bz1/plJTTNC1rC70/ehQnGlZ y1w9nuJ2KXC1hBQrhrCA7RWmRbL86l0kTHI8t0d0NNUhxmG24aQGhHtx6waMa2w4 y4B0BmTDJOK7EQDUgbWPfTSK+Tg== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v0hqcjf8e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:05 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BG0L45w015519 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:04 GMT Received: from [169.254.0.1] (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Fri, 15 Dec 2023 16:21:03 -0800 From: Elliot Berman Date: Fri, 15 Dec 2023 16:20:47 -0800 Subject: [PATCH RFC v15 06/30] virt: gunyah: msgq: Add hypercalls to send and receive messages Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231215-gunyah-v15-6-192a5d872a30@quicinc.com> References: <20231215-gunyah-v15-0-192a5d872a30@quicinc.com> In-Reply-To: <20231215-gunyah-v15-0-192a5d872a30@quicinc.com> To: Alex Elder , Srinivas Kandagatla , Murali Nalajal , Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Philip Derrin , Prakruthi Deepak Heragu , Jonathan Corbet , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Catalin Marinas , Will Deacon , Konrad Dybcio , Bjorn Andersson , Dmitry Baryshkov , "Fuad Tabba" , Sean Christopherson CC: , , , , , Elliot Berman X-Mailer: b4 0.13-dev X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: QmBFIMYPI86yIje7NAN2g-T1lKudR__E X-Proofpoint-GUID: QmBFIMYPI86yIje7NAN2g-T1lKudR__E X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxscore=0 phishscore=0 adultscore=0 priorityscore=1501 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312160001 Add hypercalls to send and receive messages on a Gunyah message queue. Reviewed-by: Alex Elder Reviewed-by: Srinivas Kandagatla Signed-off-by: Elliot Berman --- arch/arm64/gunyah/gunyah_hypercall.c | 34 ++++++++++++++++++++++++++++++++++ include/linux/gunyah.h | 7 +++++++ 2 files changed, 41 insertions(+) diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index 739d7f9cef9f..cadc512934c4 100644 --- a/arch/arm64/gunyah/gunyah_hypercall.c +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -37,6 +37,8 @@ EXPORT_SYMBOL_GPL(arch_is_gunyah_guest); /* clang-format off */ #define GUNYAH_HYPERCALL_HYP_IDENTIFY GUNYAH_HYPERCALL(0x8000) +#define GUNYAH_HYPERCALL_MSGQ_SEND GUNYAH_HYPERCALL(0x801B) +#define GUNYAH_HYPERCALL_MSGQ_RECV GUNYAH_HYPERCALL(0x801C) /* clang-format on */ /** @@ -58,5 +60,37 @@ void gunyah_hypercall_hyp_identify( } EXPORT_SYMBOL_GPL(gunyah_hypercall_hyp_identify); +enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff, + u64 tx_flags, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_MSGQ_SEND, capid, size, + (uintptr_t)buff, tx_flags, 0, &res); + + if (res.a0 == GUNYAH_ERROR_OK) + *ready = !!res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_msgq_send); + +enum gunyah_error gunyah_hypercall_msgq_recv(u64 capid, void *buff, size_t size, + size_t *recv_size, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_MSGQ_RECV, capid, (uintptr_t)buff, + size, 0, &res); + + if (res.a0 == GUNYAH_ERROR_OK) { + *recv_size = res.a1; + *ready = !!res.a2; + } + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_msgq_recv); + MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 8cdeaba34aa9..ea2c9eecce0e 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -141,4 +141,11 @@ gunyah_api_version(const struct gunyah_hypercall_hyp_identify_resp *gunyah_api) void gunyah_hypercall_hyp_identify( struct gunyah_hypercall_hyp_identify_resp *hyp_identity); +#define GUNYAH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) + +enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff, + u64 tx_flags, bool *ready); +enum gunyah_error gunyah_hypercall_msgq_recv(u64 capid, void *buff, size_t size, + size_t *recv_size, bool *ready); + #endif