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Mon, 21 Nov 2022 14:01:48 GMT Received: from hu-eberman-lv.qualcomm.com (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 15.2.986.36; Mon, 21 Nov 2022 06:01:46 -0800 From: Elliot Berman To: Bjorn Andersson , Catalin Marinas , Will Deacon , Elliot Berman , Murali Nalajala CC: Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Prakruthi Deepak Heragu , Arnd Bergmann , Greg Kroah-Hartman , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , "Jassi Brar" , Sudeep Holla , "Mark Rutland" , Lorenzo Pieralisi , , , , , , Subject: [PATCH v7 08/20] virt: gunyah: msgq: Add hypercalls to send and receive messages Date: Mon, 21 Nov 2022 05:59:57 -0800 Message-ID: <20221121140009.2353512-9-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221121140009.2353512-1-quic_eberman@quicinc.com> References: <20221121140009.2353512-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) 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-GUID: su16h1UgvQxX9to2T2Ro0crA6zCQ78HU X-Proofpoint-ORIG-GUID: su16h1UgvQxX9to2T2Ro0crA6zCQ78HU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.895,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-11-21_13,2022-11-18_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 suspectscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2210170000 definitions=main-2211210109 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221121_060208_576610_753E0BEC X-CRM114-Status: GOOD ( 17.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add hypercalls to send and receive messages on a Gunyah message queue. Signed-off-by: Elliot Berman --- arch/arm64/gunyah/gunyah_hypercall.c | 33 ++++++++++++++++++++++++++++ include/linux/gunyah.h | 5 +++++ 2 files changed, 38 insertions(+) diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index 0beb3123d650..d28600909be4 100644 --- a/arch/arm64/gunyah/gunyah_hypercall.c +++ b/arch/arm64/gunyah/gunyah_hypercall.c @@ -26,6 +26,8 @@ GH_FN_ID(GH_CALL_TYPE_HYPERCALL, fn)) #define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x0000) +#define GH_HYPERCALL_MSGQ_SEND GH_HYPERCALL(0x001B) +#define GH_HYPERCALL_MSGQ_RECV GH_HYPERCALL(0x001C) /** * gh_hypercall_get_uid() - Returns a UID when running under a Gunyah hypervisor @@ -65,5 +67,36 @@ void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identi } EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify); +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_SEND, capid, size, buff, tx_flags, 0, &res); + + if (res.a0) + return res.a0; + + *ready = res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_send); + +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GH_HYPERCALL_MSGQ_RECV, capid, buff, size, 0, &res); + + if (res.a0) + return res.a0; + + *recv_size = res.a1; + *ready = res.a2; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gh_hypercall_msgq_recv); + MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls"); diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index 166156f69df9..c863cac4a3cf 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -102,4 +102,9 @@ static inline u16 gh_api_version(void) void gh_hypercall_get_uid(u32 uid[4]); void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity); +#define GH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) + +int gh_hypercall_msgq_send(u64 capid, size_t size, uintptr_t buff, int tx_flags, bool *ready); +int gh_hypercall_msgq_recv(u64 capid, uintptr_t buff, size_t size, size_t *recv_size, bool *ready); + #endif