freebsd-dev/sys/dev/uart
Wei Hu 8ea7fa16d9 uart: Don't change settings or throttle putc for Hyper-V
Azure setup does not like it when FreeBSD overrides the settings of the
UART device. When Hyper-V is detected, don't do this and also don't
throttle putc() output. This is a workaround for the early boot hang
of FreeBSD on Azure.

Tested on Azure, ESXi (VM with serial port), and SG-8200

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)
2023-03-18 07:07:54 +00:00
..
uart_bus_acpi.c uart_bus_acpi: Read clock frequency from bus 2022-09-07 09:44:58 +02:00
uart_bus_fdt.c
uart_bus_isa.c
uart_bus_pci.c uart(4): Add support for AMT virtual serial port (C610/X99 series) 2022-12-20 23:56:00 +08:00
uart_bus_puc.c
uart_bus_scc.c
uart_bus.h
uart_core.c
uart_cpu_acpi.c
uart_cpu_acpi.h
uart_cpu_arm64.c uart: uart_cpu_arm64: fix the build without FDT 2022-09-29 14:33:32 -05:00
uart_cpu_fdt.c
uart_cpu_fdt.h
uart_cpu_powerpc.c
uart_cpu_x86.c
uart_cpu.h
uart_dbg.c
uart_dev_imx.c
uart_dev_imx.h
uart_dev_lowrisc.c
uart_dev_lowrisc.h
uart_dev_msm.c
uart_dev_msm.h
uart_dev_mu.c
uart_dev_mvebu.c
uart_dev_ns8250.c uart: Don't change settings or throttle putc for Hyper-V 2023-03-18 07:07:54 +00:00
uart_dev_ns8250.h
uart_dev_pl011.c Add support for the new Arm Generic UART _HID 2022-12-22 14:24:40 +00:00
uart_dev_quicc.c
uart_dev_snps.c uart_dev_snps: Fix device probing 2022-10-06 16:42:51 +02:00
uart_dev_ti8250.c
uart_dev_z8530.c
uart_if.m
uart_ppstypes.h
uart_subr.c arm: Catch up with Samsung S3C2xx0 code removal 2022-09-30 18:12:10 -06:00
uart_tty.c Downgrade tty_intr_event from a global 2022-10-12 13:46:12 -03:00
uart.h uart: Remove sbbc reference 2022-09-30 18:26:45 -06:00