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Tue, 9 Jan 2024 19:38:09 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; Tue, 9 Jan 2024 11:38:08 -0800 From: Elliot Berman Date: Tue, 9 Jan 2024 11:38:08 -0800 Subject: [PATCH v16 30/34] virt: gunyah: Add hypercalls for sending doorbell MIME-Version: 1.0 Message-ID: <20240109-gunyah-v16-30-634904bf4ce9@quicinc.com> References: <20240109-gunyah-v16-0-634904bf4ce9@quicinc.com> In-Reply-To: <20240109-gunyah-v16-0-634904bf4ce9@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 0.13-dev 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-ORIG-GUID: 6mB1HQ53TyGWybWApgoJAF8XcYPAkg4i X-Proofpoint-GUID: 6mB1HQ53TyGWybWApgoJAF8XcYPAkg4i 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 phishscore=0 spamscore=0 priorityscore=1501 mlxlogscore=605 lowpriorityscore=0 mlxscore=0 suspectscore=0 impostorscore=0 clxscore=1015 adultscore=0 malwarescore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401090158 X-Rspamd-Queue-Id: BFDD818001F X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: o11gqx18whosawqbwankn5wbkw3sacqo X-HE-Tag: 1704829098-812716 X-HE-Meta: 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 U4V+IrYi AOhVq3p7b1kKj5vPXzhXjm7yDAgVk0YgDIIFxCEc8PaXwQNpRK3RicgFKTP9t69Dcu0oYeRpC47lwX2J+rMih3BTo5pUhwGAkhGwv7ATnDoR+3rIiaJtl7KDWwAKA9yOf3yzaS9q50gzbbDw8DH9uEweNszWdWw5W1CJ33CeFKuWI34HmXr+XanTKEVBFaHO1sFqa3SbZxF2Y2KFgDu3Tg+Ozhf/kvXE4lYCcgEW/rbxZAhKvkiGbdsm7pWMnzk4R8ILYe+UsnfnNohm5TqgAWYCp/9+PHifKVnyNwjqTMtlTTgcpl45Dy5K7pI9k4oyDudMEun8/GU4RMygmqydtAxNrq2XJqod7Mn9LFIhKlnFgLPGeXlAKTCKHd9wEzWNiGYnrQQaozWaCN1JARttVRhGTNbHvGIA/5ArDmBDyocIfFG1H+FikoN011g== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 38403dc28c66..3c2672d683ae 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 32ce578220ca..67cb9350ab9e 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -346,6 +346,11 @@ 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)