mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Alan Duan
da2b009612
We create a new generic plugin for rdmaproxy. Such a plugin is needed because in iRDMA, CQ and QPs are actually implemented as MRs, which already get handled correctly by rdmaproxy core. Furthermore, these MRs are indexed by virtual addresses, so a guest VA is never dereferenced in kernel space for CQ/QP operations. Therefore a specialized driver plugin to rdmaproxy is not required. Since we still have to register a driver-plugin for each device at registration time, we instead register a generic plugin which does nothing. We only register the generic plugin for an allow-list of drivers such as idpf or ice, which are all managed by the irdma subsystem.
49 lines
1.9 KiB
Go
49 lines
1.9 KiB
Go
// Copyright 2026 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package genericproxy implements a no-op rdmaproxy.Driver plug-in for an explicit
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// allow-list of host RDMA drivers.
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//
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// To make this driver available, Init() must be called.
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package genericproxy
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import (
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"gvisor.dev/gvisor/pkg/sentry/devices/rdmaproxy"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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)
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// genericDriver is the no-op rdmaproxy.Driver implementation. A single
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// instance is registered under rdmaproxy.GenericDriverName; rdmaproxy's
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// LookupDriver returns it for allow-listed host driver names that have no
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// vendor-specific plug-in of their own.
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type genericDriver struct{}
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// Name implements rdmaproxy.Driver.Name.
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func (d genericDriver) Name() string { return rdmaproxy.GenericDriverName }
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// PrepareCreateDMA implements rdmaproxy.Driver.PrepareCreateDMA. It is a
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// no-op: the UHW payload is forwarded verbatim and no pages are mirrored.
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func (genericDriver) PrepareCreateDMA(t *kernel.Task, uhwIn []byte) (*rdmaproxy.PinnedDMABufs, error) {
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return nil, nil
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}
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// Schemas implements rdmaproxy.Driver.Schemas. No driver-namespace methods
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// are modeled; driver-private ioctl methods are rejected by the core.
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func (genericDriver) Schemas() map[uint32]*rdmaproxy.MethodSchema {
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return nil
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}
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// Init registers the no-op plug-in once under rdmaproxy.GenericDriverName.
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func Init() { rdmaproxy.RegisterDriver(genericDriver{}) }
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