Date: Sat, 18 Mar 2023 07:21:31 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264267 --- Comment #34 from commit-hook@FreeBSD.org --- A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/src/commit/?id=927358dd98cb902160093e0dc0bac002d6b43858 commit 927358dd98cb902160093e0dc0bac002d6b43858 Author: Wei Hu <whu@FreeBSD.org> AuthorDate: 2023-03-14 15:13:46 +0000 Commit: Wei Hu <whu@FreeBSD.org> CommitDate: 2023-03-18 07:07:35 +0000 amd64 loader: Use efiserialio for Hyper-V booted systems UEFI provides ConIn/ConOut handles for consoles that it supports, which include the text-video and serial ports. When the serial port is available, use the UEFI driver instead of direct io-port accesses to avoid conflicts between the firmware and direct hardware access, as happens on Hyper-V (Azure) setups. This change enables efiserialio to be built for efi-amd64 and has higher order priority vs comconsole, and only uses efiserialio if the hypervisor is Hyper-V. When efiserialio successfully probes, it will set efi_comconsole_avail=true which will prevent comconsole from probing in this setup. Tested on Hyper-V, ESXi and Azure VMs. PR: 264267 Reviewed by: kevans, whu Tested by: whu Obtained from: Rubicon Communications, LLC (Netgate) MFC after: 2 weeks Sponsored by: Rubicon Communications, LLC (Netgate) stand/efi/loader/arch/amd64/Makefile.inc | 1 + stand/efi/loader/bootinfo.c | 11 ++++++-- stand/efi/loader/conf.c | 6 +++++ stand/efi/loader/efiserialio.c | 43 ++++++++++++++++++++++++++++---- stand/i386/libi386/comconsole.c | 14 +++++++++++ 5 files changed, 68 insertions(+), 7 deletions(-) -- You are receiving this mail because: You are the assignee for the bug.