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aarch64: Enable IRQ routing for legacy devices

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On AArch64, interrupt controller (GIC) is emulated by KVM. VMM need to
set IRQ routing for devices, including legacy ones.

Before this commit, IRQ routing was only set for MSI. Legacy routing
entries of type KVM_IRQ_ROUTING_IRQCHIP were missing. That is way legacy
devices (like serial device ttyS0) does not work.

The setting of X86 IRQ routing entries are not impacted.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao
2021-03-14 14:35:43 +08:00
committed by Xin Wang
parent 2a8bdf710d
commit afc83582be
6 changed files with 49 additions and 15 deletions
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6
arch/src/aarch64/layout.rs
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@@ -78,9 +78,9 @@ pub const FDT_MAX_SIZE: usize = 0x20_0000;
// * bigger than 32
// * less than 1023 and
// * a multiple of 32.
// We are setting up our interrupt controller to support a maximum of 128 interrupts.
// We are setting up our interrupt controller to support a maximum of 256 interrupts.
/// First usable interrupt on aarch64.
pub const IRQ_BASE: u32 = 32;
pub const IRQ_BASE: u32 = 0;
/// Last usable interrupt on aarch64.
pub const IRQ_MAX: u32 = 159;
pub const IRQ_MAX: u32 = 255;