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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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05e5106b9b
This requires making get/set_lapic_reg part of the type. For the moment we cannot provide a default variant for the new type, because picking one will be wrong for the other hypervisor, so I just drop the test cases that requires LapicState::default(). Signed-off-by: Wei Liu <liuwe@microsoft.com>
40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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//
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// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-BSD-3-Clause file.
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use std::result;
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use std::sync::Arc;
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pub type Result<T> = result::Result<T, hypervisor::HypervisorCpuError>;
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// Defines poached from apicdef.h kernel header.
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pub const APIC_LVT0: usize = 0x350;
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pub const APIC_LVT1: usize = 0x360;
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pub const APIC_MODE_NMI: u32 = 0x4;
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pub const APIC_MODE_EXTINT: u32 = 0x7;
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pub fn set_apic_delivery_mode(reg: u32, mode: u32) -> u32 {
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((reg) & !0x700) | ((mode) << 8)
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}
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/// Configures LAPICs. LAPIC0 is set for external interrupts, LAPIC1 is set for NMI.
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///
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/// # Arguments
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/// * `vcpu` - The VCPU object to configure.
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pub fn set_lint(vcpu: &Arc<dyn hypervisor::Vcpu>) -> Result<()> {
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let mut klapic = vcpu.get_lapic()?;
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let lvt_lint0 = klapic.get_klapic_reg(APIC_LVT0);
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klapic.set_klapic_reg(
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APIC_LVT0,
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set_apic_delivery_mode(lvt_lint0, APIC_MODE_EXTINT),
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);
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let lvt_lint1 = klapic.get_klapic_reg(APIC_LVT1);
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klapic.set_klapic_reg(APIC_LVT1, set_apic_delivery_mode(lvt_lint1, APIC_MODE_NMI));
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vcpu.set_lapic(&klapic)
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}
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