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https://github.com/projectacrn/acrn-hypervisor.git
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3b88d3c2ac
a guest may use per-cpu vector allocation mechanism which may lead to same vector on different vcpu for different vioapic pins. when we broadcast EOI from vlapic to vioapic, it could trigger ptdev_intx_ack for incorrect vioapic pin which will lead to incorrect vioapic irq deassert. old implementation is recording assert & deassert by acnt, like: - assert -> acnt++ - deassert -> acnt-- which means an incorrect deassert may descrease acnt from 0 to -1, it leads to error. this patch change the recording method for a pin assert/deassert, it just use pin_state bit set/clear to indicate line state: - high -> pin_state bitmap set - low -> pin_state bitmap clear and the irq assert will be triggered based on polarity setting during line state changing. it can avoid the failure of incorrect deassert on old implementation, and for ptdev sharing irq, the dev hardware could re-trigger interrupt after deassert. but for emulated device, there is no mechanism to re-trigger interrupt if there is irq sharing - for DM, we already has constraint to restrict vGSI sharing, so there is no problem of it. Tracked-On: #1269 Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com> |
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| .. | ||
| arch/x86 | ||
| boot | ||
| bsp | ||
| common | ||
| debug | ||
| dm | ||
| include | ||
| lib | ||
| partition | ||
| scripts/kconfig | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README.rst | ||
Embedded-Hypervisor ################### This open source embedded hypervisor defines a software architecture for running multiple software subsystems managed securely on a consolidated system (by means of a virtual machine manager), and defines a reference framework Device Model implementation for devices emulation This embedded hypervisor is type-1 reference hypervisor, running directly on the system hardware. It can be used for building software defined cockpit (SDC) or In-Vehicle Experience (IVE) solutions running on Intel Architecture Apollo Lake platforms. As a reference implementation, it provides the basis for embedded hypervisor vendors to build solutions with an open source reference I/O mediation solution, and provides auto makers a reference software stack for SDC usage. This embedded hypervisor is able to support both Linux* and Android* as a Guest OS, managed by the hypervisor, where applications can run. This embedded hypervisor is a partitioning hypervisor reference stack, also suitable for non-automotive IoT & embedded device solutions. It will be addressing the gap that currently exists between datacenter hypervisors, hard partitioning hypervisors, and select industrial applications. Extending the scope of this open source embedded hypervisor relies on the involvement of community developers like you!