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Fri, 20 Jan 2023 22:47:51 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; Fri, 20 Jan 2023 14:47:50 -0800 From: Elliot Berman To: Bjorn Andersson , Alex Elder , Elliot Berman , Murali Nalajala CC: Trilok Soni , Srivatsa Vaddagiri , Carl van Schaik , Prakruthi Deepak Heragu , Dmitry Baryshkov , Arnd Bergmann , "Greg Kroah-Hartman" , Rob Herring , Krzysztof Kozlowski , Jonathan Corbet , Bagas Sanjaya , Catalin Marinas , Will Deacon , Marc Zyngier , Jassi Brar , Sudeep Holla , , , , , Subject: [PATCH v9 14/27] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot Date: Fri, 20 Jan 2023 14:46:13 -0800 Message-ID: <20230120224627.4053418-15-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230120224627.4053418-1-quic_eberman@quicinc.com> References: <20230120224627.4053418-1-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-ORIG-GUID: m-UFTBsVdZcKMIEsmkx7jPaAxu9CmTlC X-Proofpoint-GUID: m-UFTBsVdZcKMIEsmkx7jPaAxu9CmTlC X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-20_11,2023-01-20_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 impostorscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 mlxscore=0 spamscore=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301200218 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230120_144808_695922_C3BC2A0F X-CRM114-Status: GOOD ( 25.17 ) 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 remaining ioctls to support non-proxy VM boot: - Gunyah Resource Manager uses the VM's devicetree to configure the virtual machine. The location of the devicetree in the guest's virtual memory can be declared via the SET_DTB_CONFIG ioctl. - Trigger start of the virtual machine with VM_START ioctl. Co-developed-by: Prakruthi Deepak Heragu Signed-off-by: Prakruthi Deepak Heragu Signed-off-by: Elliot Berman --- drivers/virt/gunyah/vm_mgr.c | 110 ++++++++++++++++++++++++++++++++ drivers/virt/gunyah/vm_mgr.h | 9 +++ drivers/virt/gunyah/vm_mgr_mm.c | 24 +++++++ include/uapi/linux/gunyah.h | 8 +++ 4 files changed, 151 insertions(+) diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c index b847fde63333..48bd3f06fb6c 100644 --- a/drivers/virt/gunyah/vm_mgr.c +++ b/drivers/virt/gunyah/vm_mgr.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include @@ -37,10 +38,98 @@ static __must_check struct gunyah_vm *gunyah_vm_alloc(struct gh_rm_rpc *rm) mutex_init(&ghvm->mm_lock); INIT_LIST_HEAD(&ghvm->memory_mappings); + init_rwsem(&ghvm->status_lock); return ghvm; } +static int gh_vm_start(struct gunyah_vm *ghvm) +{ + struct gunyah_vm_memory_mapping *mapping; + u64 dtb_offset; + u32 mem_handle; + int ret; + + down_write(&ghvm->status_lock); + if (ghvm->vm_status != GH_RM_VM_STATUS_NO_STATE) { + up_write(&ghvm->status_lock); + return 0; + } + + list_for_each_entry(mapping, &ghvm->memory_mappings, list) { + switch (mapping->share_type) { + case VM_MEM_LEND: + ret = gh_rm_mem_lend(ghvm->rm, &mapping->parcel); + break; + case VM_MEM_SHARE: + ret = gh_rm_mem_share(ghvm->rm, &mapping->parcel); + break; + } + if (ret > 0) + ret = -EINVAL; + if (ret) { + pr_warn("Failed to %s parcel %d: %d\n", + mapping->share_type == VM_MEM_LEND ? "lend" : "share", + mapping->parcel.label, + ret); + goto err; + } + } + + mapping = gh_vm_mem_mapping_find_mapping(ghvm, ghvm->dtb_config.gpa, ghvm->dtb_config.size); + if (!mapping) { + pr_warn("Failed to find the memory_handle for DTB\n"); + ret = -EINVAL; + goto err; + } + + mem_handle = mapping->parcel.mem_handle; + dtb_offset = ghvm->dtb_config.gpa - mapping->guest_phys_addr; + + ret = gh_rm_vm_configure(ghvm->rm, ghvm->vmid, ghvm->auth, mem_handle, + 0, 0, dtb_offset, ghvm->dtb_config.size); + if (ret) { + pr_warn("Failed to configure VM: %d\n", ret); + goto err; + } + + ret = gh_rm_vm_init(ghvm->rm, ghvm->vmid); + if (ret) { + pr_warn("Failed to initialize VM: %d\n", ret); + goto err; + } + + ret = gh_rm_vm_start(ghvm->rm, ghvm->vmid); + if (ret) { + pr_warn("Failed to start VM: %d\n", ret); + goto err; + } + + ghvm->vm_status = GH_RM_VM_STATUS_READY; + + up_write(&ghvm->status_lock); + return ret; +err: + ghvm->vm_status = GH_RM_VM_STATUS_INIT_FAILED; + up_write(&ghvm->status_lock); + return ret; +} + +static void gh_vm_stop(struct gunyah_vm *ghvm) +{ + int ret; + + down_write(&ghvm->status_lock); + if (ghvm->vm_status == GH_RM_VM_STATUS_READY) { + ret = gh_rm_vm_stop(ghvm->rm, ghvm->vmid); + if (ret) + pr_warn("Failed to stop VM: %d\n", ret); + } + + ghvm->vm_status = GH_RM_VM_STATUS_EXITED; + up_write(&ghvm->status_lock); +} + static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct gunyah_vm *ghvm = filp->private_data; @@ -84,6 +173,25 @@ static long gh_vm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) } break; } + case GH_VM_SET_DTB_CONFIG: { + struct gh_vm_dtb_config dtb_config; + + r = -EFAULT; + if (copy_from_user(&dtb_config, argp, sizeof(dtb_config))) + break; + + dtb_config.size = PAGE_ALIGN(dtb_config.size); + ghvm->dtb_config = dtb_config; + + r = 0; + break; + } + case GH_VM_START: { + r = gh_vm_start(ghvm); + if (r) + r = -EINVAL; + break; + } default: r = -ENOTTY; break; @@ -97,6 +205,8 @@ static int gh_vm_release(struct inode *inode, struct file *filp) struct gunyah_vm *ghvm = filp->private_data; struct gunyah_vm_memory_mapping *mapping, *tmp; + gh_vm_stop(ghvm); + list_for_each_entry_safe(mapping, tmp, &ghvm->memory_mappings, list) { gh_vm_mem_mapping_reclaim(ghvm, mapping); kfree(mapping); diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h index 6b38bf780f76..5c02fb305893 100644 --- a/drivers/virt/gunyah/vm_mgr.h +++ b/drivers/virt/gunyah/vm_mgr.h @@ -10,6 +10,7 @@ #include #include #include +#include #include @@ -34,6 +35,12 @@ struct gunyah_vm { u16 vmid; struct gh_rm *rm; + enum gh_rm_vm_auth_mechanism auth; + struct gh_vm_dtb_config dtb_config; + + enum gh_rm_vm_status vm_status; + struct rw_semaphore status_lock; + struct mutex mm_lock; struct list_head memory_mappings; }; @@ -42,5 +49,7 @@ struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_alloc(struct gunyah_vm *ghvm, struct gh_userspace_memory_region *region); void gh_vm_mem_mapping_reclaim(struct gunyah_vm *ghvm, struct gunyah_vm_memory_mapping *mapping); struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find(struct gunyah_vm *ghvm, u32 label); +struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find_mapping(struct gunyah_vm *ghvm, + u64 gpa, u32 size); #endif diff --git a/drivers/virt/gunyah/vm_mgr_mm.c b/drivers/virt/gunyah/vm_mgr_mm.c index f2dbdb4ee8ab..7fcb9f8a29bf 100644 --- a/drivers/virt/gunyah/vm_mgr_mm.c +++ b/drivers/virt/gunyah/vm_mgr_mm.c @@ -53,6 +53,30 @@ void gh_vm_mem_mapping_reclaim(struct gunyah_vm *ghvm, struct gunyah_vm_memory_m mutex_unlock(&ghvm->mm_lock); } +struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find_mapping(struct gunyah_vm *ghvm, + u64 gpa, u32 size) +{ + struct gunyah_vm_memory_mapping *mapping = NULL; + int ret; + + ret = mutex_lock_interruptible(&ghvm->mm_lock); + if (ret) + return ERR_PTR(ret); + + list_for_each_entry(mapping, &ghvm->memory_mappings, list) { + if (gpa >= mapping->guest_phys_addr && + (gpa + size <= mapping->guest_phys_addr + + (mapping->npages << PAGE_SHIFT))) { + goto unlock; + } + } + + mapping = NULL; +unlock: + mutex_unlock(&ghvm->mm_lock); + return mapping; +} + struct gunyah_vm_memory_mapping *gh_vm_mem_mapping_find(struct gunyah_vm *ghvm, u32 label) { struct gunyah_vm_memory_mapping *mapping; diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h index 574f33b198d0..36359ad2175e 100644 --- a/include/uapi/linux/gunyah.h +++ b/include/uapi/linux/gunyah.h @@ -42,4 +42,12 @@ struct gh_userspace_memory_region { #define GH_VM_SET_USER_MEM_REGION _IOW(GH_IOCTL_TYPE, 0x1, \ struct gh_userspace_memory_region) +struct gh_vm_dtb_config { + __u64 gpa; + __u64 size; +}; +#define GH_VM_SET_DTB_CONFIG _IOW(GH_IOCTL_TYPE, 0x2, struct gh_vm_dtb_config) + +#define GH_VM_START _IO(GH_IOCTL_TYPE, 0x3) + #endif