From: Elliot Berman <quic_eberman@quicinc.com>
To: Alex Elder <elder@linaro.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Murali Nalajal <quic_mnalajal@quicinc.com>,
Trilok Soni <quic_tsoni@quicinc.com>,
Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
Carl van Schaik <quic_cvanscha@quicinc.com>,
Philip Derrin <quic_pderrin@quicinc.com>,
Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>,
Jonathan Corbet <corbet@lwn.net>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
"Fuad Tabba" <tabba@google.com>,
Sean Christopherson <seanjc@google.com>,
"Andrew Morton" <akpm@linux-foundation.org>
Cc: <linux-arm-msm@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>, <linux-mm@kvack.org>,
Elliot Berman <quic_eberman@quicinc.com>
Subject: [PATCH v17 26/35] virt: gunyah: Share guest VM dtb configuration to Gunyah
Date: Thu, 22 Feb 2024 15:16:49 -0800 [thread overview]
Message-ID: <20240222-gunyah-v17-26-1e9da6763d38@quicinc.com> (raw)
In-Reply-To: <20240222-gunyah-v17-0-1e9da6763d38@quicinc.com>
Gunyah Resource Manager sets up a virtual machine based on a device tree
which lives in guest memory. Resource manager requires this memory to be
provided as a memory parcel for it to read and manipulate. Construct a
memory parcel, lend it to the virtual machine, and inform resource
manager about the device tree location (the memory parcel ID and offset
into the memory parcel).
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
---
drivers/virt/gunyah/vm_mgr.c | 45 ++++++++++++++++++++++++++++++++++++++++++--
drivers/virt/gunyah/vm_mgr.h | 13 ++++++++++++-
include/uapi/linux/gunyah.h | 14 ++++++++++++++
3 files changed, 69 insertions(+), 3 deletions(-)
diff --git a/drivers/virt/gunyah/vm_mgr.c b/drivers/virt/gunyah/vm_mgr.c
index 43878a39d4714..198a99d78c44c 100644
--- a/drivers/virt/gunyah/vm_mgr.c
+++ b/drivers/virt/gunyah/vm_mgr.c
@@ -452,8 +452,23 @@ static int gunyah_vm_start(struct gunyah_vm *ghvm)
ghvm->vmid = ret;
ghvm->vm_status = GUNYAH_RM_VM_STATUS_LOAD;
- ret = gunyah_rm_vm_configure(ghvm->rm, ghvm->vmid, ghvm->auth, 0, 0, 0,
- 0, 0);
+ ghvm->dtb.parcel_start = ghvm->dtb.config.guest_phys_addr >> PAGE_SHIFT;
+ ghvm->dtb.parcel_pages = ghvm->dtb.config.size >> PAGE_SHIFT;
+ ret = gunyah_gmem_share_parcel(ghvm, &ghvm->dtb.parcel,
+ &ghvm->dtb.parcel_start,
+ &ghvm->dtb.parcel_pages);
+ if (ret) {
+ dev_warn(ghvm->parent,
+ "Failed to allocate parcel for DTB: %d\n", ret);
+ goto err;
+ }
+
+ ret = gunyah_rm_vm_configure(ghvm->rm, ghvm->vmid, ghvm->auth,
+ ghvm->dtb.parcel.mem_handle, 0, 0,
+ ghvm->dtb.config.guest_phys_addr -
+ (ghvm->dtb.parcel_start
+ << PAGE_SHIFT),
+ ghvm->dtb.config.size);
if (ret) {
dev_warn(ghvm->parent, "Failed to configure VM: %d\n", ret);
goto err;
@@ -536,6 +551,21 @@ static long gunyah_vm_ioctl(struct file *filp, unsigned int cmd,
long r;
switch (cmd) {
+ case GUNYAH_VM_SET_DTB_CONFIG: {
+ struct gunyah_vm_dtb_config dtb_config;
+
+ if (copy_from_user(&dtb_config, argp, sizeof(dtb_config)))
+ return -EFAULT;
+
+ if (overflows_type(dtb_config.guest_phys_addr + dtb_config.size,
+ u64))
+ return -EOVERFLOW;
+
+ ghvm->dtb.config = dtb_config;
+
+ r = 0;
+ break;
+ }
case GUNYAH_VM_START: {
r = gunyah_vm_ensure_started(ghvm);
break;
@@ -594,6 +624,17 @@ static void _gunyah_vm_put(struct kref *kref)
if (ghvm->vm_status == GUNYAH_RM_VM_STATUS_RUNNING)
gunyah_vm_stop(ghvm);
+ if (ghvm->vm_status == GUNYAH_RM_VM_STATUS_LOAD ||
+ ghvm->vm_status == GUNYAH_RM_VM_STATUS_READY ||
+ ghvm->vm_status == GUNYAH_RM_VM_STATUS_INIT_FAILED) {
+ ret = gunyah_gmem_reclaim_parcel(ghvm, &ghvm->dtb.parcel,
+ ghvm->dtb.parcel_start,
+ ghvm->dtb.parcel_pages);
+ if (ret)
+ dev_err(ghvm->parent,
+ "Failed to reclaim DTB parcel: %d\n", ret);
+ }
+
gunyah_vm_remove_functions(ghvm);
down_write(&ghvm->bindings_lock);
diff --git a/drivers/virt/gunyah/vm_mgr.h b/drivers/virt/gunyah/vm_mgr.h
index b6bc66f018b09..d8c299e5cf7cc 100644
--- a/drivers/virt/gunyah/vm_mgr.h
+++ b/drivers/virt/gunyah/vm_mgr.h
@@ -74,6 +74,13 @@ long gunyah_dev_vm_mgr_ioctl(struct gunyah_rm *rm, unsigned int cmd,
* @resource_tickets: List of &struct gunyah_vm_resource_ticket
* @auth: Authentication mechanism to be used by resource manager when
* launching the VM
+ * @dtb: For tracking dtb configuration when launching the VM
+ * @dtb.config: Location of the DTB in the guest memory
+ * @dtb.parcel_start: Guest frame number where the memory parcel that we lent to
+ * VM (DTB could start in middle of folio; we lend entire
+ * folio; parcel_start is start of the folio)
+ * @dtb.parcel_pages: Number of pages lent for the memory parcel
+ * @dtb.parcel: Data for resource manager to lend the parcel
*
* Members are grouped by hot path.
*/
@@ -103,7 +110,11 @@ struct gunyah_vm {
struct device *parent;
enum gunyah_rm_vm_auth_mechanism auth;
-
+ struct {
+ struct gunyah_vm_dtb_config config;
+ u64 parcel_start, parcel_pages;
+ struct gunyah_rm_mem_parcel parcel;
+ } dtb;
};
/**
diff --git a/include/uapi/linux/gunyah.h b/include/uapi/linux/gunyah.h
index 1af4c5ae6bc3e..a89d9bedf3e5d 100644
--- a/include/uapi/linux/gunyah.h
+++ b/include/uapi/linux/gunyah.h
@@ -42,6 +42,20 @@ struct gunyah_create_mem_args {
/*
* ioctls for gunyah-vm fds (returned by GUNYAH_CREATE_VM)
*/
+
+/**
+ * struct gunyah_vm_dtb_config - Set the location of the VM's devicetree blob
+ * @guest_phys_addr: Address of the VM's devicetree in guest memory.
+ * @size: Maximum size of the devicetree including space for overlays.
+ * Resource manager applies an overlay to the DTB and dtb_size should
+ * include room for the overlay. A page of memory is typicaly plenty.
+ */
+struct gunyah_vm_dtb_config {
+ __u64 guest_phys_addr;
+ __u64 size;
+};
+#define GUNYAH_VM_SET_DTB_CONFIG _IOW(GUNYAH_IOCTL_TYPE, 0x2, struct gunyah_vm_dtb_config)
+
#define GUNYAH_VM_START _IO(GUNYAH_IOCTL_TYPE, 0x3)
/**
--
2.34.1
next prev parent reply other threads:[~2024-02-22 23:17 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 23:16 [PATCH v17 00/35] Drivers for Gunyah hypervisor Elliot Berman
2024-02-22 23:16 ` [PATCH v17 01/35] docs: gunyah: Introduce Gunyah Hypervisor Elliot Berman
2024-03-05 10:53 ` Pavan Kondeti
2024-03-07 15:37 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 02/35] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2024-02-22 23:16 ` [PATCH v17 03/35] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2024-02-22 23:16 ` [PATCH v17 04/35] virt: gunyah: Add hypercalls to identify Gunyah Elliot Berman
2024-02-22 23:16 ` [PATCH v17 05/35] virt: gunyah: Add hypervisor driver Elliot Berman
2024-02-23 21:10 ` Konrad Dybcio
2024-02-23 22:58 ` Elliot Berman
2024-02-23 23:46 ` Konrad Dybcio
2024-03-07 15:38 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 06/35] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2024-02-22 23:16 ` [PATCH v17 07/35] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2024-03-07 15:38 ` Srivatsa Vaddagiri
2024-03-07 16:41 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 08/35] gunyah: vm_mgr: Introduce basic VM Manager Elliot Berman
2024-03-07 15:39 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 09/35] gunyah: rsc_mgr: Add VM lifecycle RPC Elliot Berman
2024-03-07 15:39 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 10/35] gunyah: vm_mgr: Add VM start/stop Elliot Berman
2024-03-11 5:38 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 11/35] virt: gunyah: Translate gh_rm_hyp_resource into gunyah_resource Elliot Berman
2024-03-11 5:39 ` Srivatsa Vaddagiri
2024-03-11 17:19 ` Elliot Berman
2024-04-05 3:10 ` Pavan Kondeti
2024-04-05 15:18 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 12/35] virt: gunyah: Add resource tickets Elliot Berman
2024-03-11 5:38 ` Srivatsa Vaddagiri
2024-03-11 17:13 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 13/35] gunyah: vm_mgr: Add framework for VM Functions Elliot Berman
2024-03-13 9:20 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 14/35] virt: gunyah: Add hypercalls for running a vCPU Elliot Berman
2024-03-13 9:21 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 15/35] virt: gunyah: Add proxy-scheduled vCPUs Elliot Berman
2024-03-13 9:21 ` Srivatsa Vaddagiri
2024-04-24 9:39 ` Srivatsa Vaddagiri
2024-04-24 17:01 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 16/35] gunyah: Add hypercalls for demand paging Elliot Berman
2024-03-13 15:35 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 17/35] gunyah: rsc_mgr: Add memory parcel RPC Elliot Berman
2024-03-14 14:02 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 18/35] mm/interval_tree: Export iter_first/iter_next Elliot Berman
2024-02-22 23:16 ` [PATCH v17 19/35] arch/mm: Export direct {un,}map functions Elliot Berman
2024-02-23 7:09 ` Christoph Hellwig
2024-02-24 0:37 ` Elliot Berman
2024-02-26 11:06 ` Christoph Hellwig
2024-02-26 11:53 ` David Hildenbrand
2024-02-26 17:27 ` Elliot Berman
2024-02-27 9:49 ` David Hildenbrand
2024-03-01 1:35 ` Elliot Berman
2024-03-04 13:10 ` Quentin Perret
2024-03-04 23:37 ` Elliot Berman
2024-03-05 15:30 ` Quentin Perret
2024-03-05 20:26 ` Elliot Berman
2024-03-06 12:05 ` Quentin Perret
2024-03-08 19:55 ` Elliot Berman
2024-02-22 23:16 ` [PATCH v17 20/35] virt: gunyah: Add interfaces to map memory into guest address space Elliot Berman
2024-02-22 23:16 ` [PATCH v17 21/35] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Elliot Berman
2024-02-22 23:16 ` [PATCH v17 22/35] virt: gunyah: Add Qualcomm Gunyah platform ops Elliot Berman
2024-02-22 23:16 ` [PATCH v17 23/35] virt: gunyah: Implement guestmemfd Elliot Berman
2024-02-22 23:16 ` [PATCH v17 24/35] virt: gunyah: Add ioctl to bind guestmem to VMs Elliot Berman
2024-02-22 23:16 ` [PATCH v17 25/35] virt: gunyah: guestmem: Initialize RM mem parcels from guestmem Elliot Berman
2024-02-22 23:16 ` Elliot Berman [this message]
2024-02-22 23:16 ` [PATCH v17 27/35] gunyah: rsc_mgr: Add RPC to enable demand paging Elliot Berman
2024-02-22 23:16 ` [PATCH v17 28/35] virt: gunyah: Enable " Elliot Berman
2024-02-22 23:16 ` [PATCH v17 29/35] gunyah: rsc_mgr: Add RPC to set VM boot context Elliot Berman
2024-03-14 14:02 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 30/35] virt: gunyah: Allow userspace to initialize context of primary vCPU Elliot Berman
2024-03-14 14:03 ` Srivatsa Vaddagiri
2024-02-22 23:16 ` [PATCH v17 31/35] virt: gunyah: Add hypercalls for sending doorbell Elliot Berman
2024-02-22 23:16 ` [PATCH v17 32/35] virt: gunyah: Add irqfd interface Elliot Berman
2024-02-22 23:16 ` [PATCH v17 33/35] virt: gunyah: Add IO handlers Elliot Berman
2024-02-22 23:16 ` [PATCH v17 34/35] virt: gunyah: Add ioeventfd Elliot Berman
2024-02-22 23:16 ` [PATCH v17 35/35] MAINTAINERS: Add Gunyah hypervisor drivers section Elliot Berman
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