From patchwork Sat Dec 16 00:21:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 755238 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 20AA035298; Sat, 16 Dec 2023 00:21:32 +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="fCYUWlLw" Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.24/8.17.1.24) with ESMTP id 3BFNo4i2000712; Sat, 16 Dec 2023 00:21:18 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=HbIRZSqoWG7KxhoNG6rBUmi9dxk4637qd09P0tEjKhM =; b=fCYUWlLwaLcT+izAujed43ZDgvbQxtPynz2pWFIVEqm/q9Ik1cTzFpLy5wJ CoeAgiSqdshuGjYOtZeZAeEUYAlY0M56U4BZd6jXdWvhg+MONzZHiDkflpswdLNM jfZvTSk6Hh34gV9zaay6G7zhsQ7CZ8JFB8lUtZEbcM5dq+nGdpuLXJPa51BMUpfe YVhjqBvI8iTJSVWm0Y1j4K4DhKkj42WbqH953IVK9C6mQg0DU5/Dlg99SB5R+Eqb +QYFEJt/IQ78j63lqiXosBX7WcEisdcJZWAczRSCycjbqo67nbtJNM6AbgRfPgJb AJHA8O36WR/JQwjJRcL8FlcAb3Q== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3v0pqvshm9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:18 +0000 (GMT) Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3BG0LHjR015197 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 16 Dec 2023 00:21:17 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 16:21:16 -0800 From: Elliot Berman Date: Fri, 15 Dec 2023 16:21:08 -0800 Subject: [PATCH RFC v15 27/30] virt: gunyah: Add hypercalls for sending doorbell Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20231215-gunyah-v15-27-192a5d872a30@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-GUID: BMpa7lRJXJVJeVCGErXNrQtszqlauLaE X-Proofpoint-ORIG-GUID: BMpa7lRJXJVJeVCGErXNrQtszqlauLaE 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_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 spamscore=0 malwarescore=0 priorityscore=1501 impostorscore=0 bulkscore=0 adultscore=0 suspectscore=0 clxscore=1015 mlxscore=0 mlxlogscore=649 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2312160000 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 | 26 ++++++++++++++++++++++++++ include/linux/gunyah.h | 5 +++++ 2 files changed, 31 insertions(+) diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c index 47926df33876..ec3c92025b0b 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 +66,30 @@ void gunyah_hypercall_hyp_identify( } EXPORT_SYMBOL_GPL(gunyah_hypercall_hyp_identify); +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); + +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); + + enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff, u64 tx_flags, bool *ready) { diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h index ed461acb9e1b..dc37c270290b 100644 --- a/include/linux/gunyah.h +++ b/include/linux/gunyah.h @@ -144,6 +144,11 @@ 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); + #define GUNYAH_HYPERCALL_MSGQ_TX_FLAGS_PUSH BIT(0) enum gunyah_error gunyah_hypercall_msgq_send(u64 capid, size_t size, void *buff,