Hyper-V: Detect Extended Destination ID support
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Authored by cperciva on Sun, Feb 22, 4:11 AM.

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Subscribers

imp

Details

Reviewers

schakrabarti_microsoft.com
whu

Summary

Hyper-V advertises support for the Extended Destination ID standard via
bit 2 of the value returned in the EAX register when the hypervisor
stack properties are queried via CPUID.

This is based on a a commit to the Linux kernel, as there does not seem
to be any other documentation of this feature.

MFC after: 2 weeks

Diff Detail

Repository

rG FreeBSD src repository

Lint

Lint Skipped

Unit

Tests Skipped

Build Status

Buildable 70929
Build 67812: arc lint + arc unit

Event Timeline

cperciva created this revision.Sun, Feb 22, 4:11 AM

Herald added a subscriber: imp. · View Herald TranscriptSun, Feb 22, 4:11 AM

cperciva requested review of this revision.Sun, Feb 22, 4:11 AM

Harbormaster completed remote builds in B70871: Diff 172431.Sun, Feb 22, 4:11 AM

cperciva added a parent revision: D55431: Bhyve: Detect Extended Destination ID support.Sun, Feb 22, 4:11 AM

cperciva added a reviewer: schakrabarti_microsoft.com.Sun, Feb 22, 4:16 AM

lwhsu added a reviewer: whu.Mon, Feb 23, 9:45 AM

Only enable if ext_dest_id is set to -1.

Harbormaster completed remote builds in B70929: Diff 172541.Mon, Feb 23, 7:53 PM

Revision Contents
Changeset List

Path

Size

sys/

dev/

hyperv/

vmbus/

x86/

hyperv_reg.h

6 lines

x86/

msi.c

10 lines

Diff 172541

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sys/dev/hyperv/vmbus/x86/hyperv_reg.h