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Thu, 22 Feb 2024 23:16:45 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 15.2.1118.40; Thu, 22 Feb 2024 15:16:44 -0800 From: Elliot Berman Date: Thu, 22 Feb 2024 15:16:54 -0800 Subject: [PATCH v17 31/35] virt: gunyah: Add hypercalls for sending doorbell Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240222-gunyah-v17-31-1e9da6763d38@quicinc.com> References: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com> In-Reply-To: <20240222-gunyah-v17-0-1e9da6763d38@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 , "Andrew Morton" CC: , , , , , , Elliot Berman X-Mailer: b4 0.12.4 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-ORIG-GUID: VZTBPD9GNP7fE8d0d0Q9iN80QKQFlH07 X-Proofpoint-GUID: VZTBPD9GNP7fE8d0d0Q9iN80QKQFlH07 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-22_15,2024-02-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 mlxscore=0 suspectscore=0 phishscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 priorityscore=1501 mlxlogscore=713 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402220179 Gunyah doorbells allow a virtual machine to signal another using interrupts. Add the hypercalls needed to assert the interrupt. Reviewed-by: Alex Elder Signed-off-by: Elliot Berman --- arch/arm64/gunyah/gunyah_hypercall.c | 38 ++++++++++++++++++++++++++++++++++++ include/linux/gunyah.h | 5 +++++ 2 files changed, 43 insertions(+) diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index 38403dc28c66f..3c2672d683ae2 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_BELL_SEND GUNYAH_HYPERCALL(0x8012) +#define GUNYAH_HYPERCALL_BELL_SET_MASK GUNYAH_HYPERCALL(0x8015) #define GUNYAH_HYPERCALL_MSGQ_SEND GUNYAH_HYPERCALL(0x801B) #define GUNYAH_HYPERCALL_MSGQ_RECV GUNYAH_HYPERCALL(0x801C) #define GUNYAH_HYPERCALL_ADDRSPACE_MAP GUNYAH_HYPERCALL(0x802B) @@ -64,6 +66,42 @@ void gunyah_hypercall_hyp_identify( } EXPORT_SYMBOL_GPL(gunyah_hypercall_hyp_identify); +/** + * gunyah_hypercall_bell_send() - Assert a gunyah doorbell + * @capid: capability ID of the doorbell + * @new_flags: bits to set on the doorbell + * @old_flags: Filled with the bits set before the send call if return value is GUNYAH_ERROR_OK + */ +enum gunyah_error gunyah_hypercall_bell_send(u64 capid, u64 new_flags, u64 *old_flags) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_BELL_SEND, capid, new_flags, 0, &res); + + if (res.a0 == GUNYAH_ERROR_OK && old_flags) + *old_flags = res.a1; + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_bell_send); + +/** + * gunyah_hypercall_bell_set_mask() - Set masks on a Gunyah doorbell + * @capid: capability ID of the doorbell + * @enable_mask: which bits trigger the receiver interrupt + * @ack_mask: which bits are automatically acknowledged when the receiver + * interrupt is ack'd + */ +enum gunyah_error gunyah_hypercall_bell_set_mask(u64 capid, u64 enable_mask, u64 ack_mask) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_hvc(GUNYAH_HYPERCALL_BELL_SET_MASK, capid, enable_mask, ack_mask, 0, &res); + + return res.a0; +} +EXPORT_SYMBOL_GPL(gunyah_hypercall_bell_set_mask); + /** * gunyah_hypercall_msgq_send() - Send a buffer on a message queue * @capid: capability ID of the message queue to add message diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index cfb80f40d4e4a..a9d58150de696 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -359,6 +359,11 @@ 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); +enum gunyah_error gunyah_hypercall_bell_send(u64 capid, u64 new_flags, + u64 *old_flags); +enum gunyah_error gunyah_hypercall_bell_set_mask(u64 capid, u64 enable_mask, + u64 ack_mask); + /* Immediately raise RX vIRQ on receiver VM */ #define GUNYAH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0)