Changes in Kconfig

8b79d4e9 - tty: hvc: Don't enable the RISC-V SBI console by default

Wed, 14 Feb 2024 15:34:30 +0000

tty: hvc: Don't enable the RISC-V SBI console by defaultThe new SBI console has the same problem as the old one: there's onlyone shared backing hardware and no synchronization, so the two driversend up stepping on each other. This was the same issue the old SBI-0.1console drivers had, but that was disabled by default when SBI-0.1 was.So just mark the new driver as nonportable.Reported-by: Emil Renner Berthing Fixes: 88ead68e764c ("tty: Add SBI debug console support to HVC SBI driver")Signed-off-by: Palmer Dabbelt Reviewed-by: Paul Walmsley Reviewed-by: Anup Patel Reviewed-by: Conor Dooley Link: https://lore.kernel.org/r/20240214153429.16484-2-palmer@rivosinc.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

88ead68e - tty: Add SBI debug console support to HVC SBI driver

Fri, 24 Nov 2023 07:09:04 +0000

tty: Add SBI debug console support to HVC SBI driverRISC-V SBI specification supports advanced debug consolesupport via SBI DBCN extension.Extend the HVC SBI driver to support it.Signed-off-by: Atish Patra Signed-off-by: Anup Patel Reviewed-by: Andrew Jones Acked-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20231124070905.1043092-5-apatel@ventanamicro.comSigned-off-by: Palmer Dabbelt List of files: /linux-6.15/drivers/tty/hvc/Kconfig

4419da5d - tty: hvc: dcc: Bind driver to CPU core0 for reads and writes

Thu, 28 Apr 2022 09:08:58 +0000

tty: hvc: dcc: Bind driver to CPU core0 for reads and writesSome external debuggers do not handle reads/writes from/to DCCon secondary cores. Each core has its own DCC device registers,so when a core reads or writes from/to DCC, it only accessesits own DCC device. Since kernel code can run on any core,every time the kernel wants to write to the console, it mightwrite to a different DCC.In SMP mode, external debugger creates multiple windows, andeach window shows the DCC output only from that core's DCC.The result is that console output is either lost or scatteredacross windows.Selecting this debug option will enable code that serializes allconsole input and output to core 0. The DCC driver will createinput and output FIFOs that all cores will use. Reads and writesfrom/to DCC are handled by a workqueue that runs only core 0.This is a debug feature to be used only in early stage developmentwhere debug serial console support would not be present. It disablesPM feature like CPU hotplug and is not suitable for productionenvironment.Signed-off-by: Shanker Donthineni Acked-by: Adam Wallis Signed-off-by: Timur Tabi Signed-off-by: Elliot Berman Signed-off-by: Sai Prakash Ranjan Link: https://lore.kernel.org/r/20220428090858.14489-1-quic_saipraka@quicinc.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

75fc6507 - tty: hvc: fix link error with CONFIG_SERIAL_CORE_CONSOLE=n

Sat, 19 Sep 2020 06:35:35 +0000

tty: hvc: fix link error with CONFIG_SERIAL_CORE_CONSOLE=naarch64-linux-gnu-ld: drivers/tty/hvc/hvc_dcc.o: in function `dcc_early_write':hvc_dcc.c:(.text+0x164): undefined reference to `uart_console_write'The driver uses the uart_console_write(), but SERIAL_CORE_CONSOLE is notselected, so uart_console_write is not defined, then we get the error.Fix this by selecting SERIAL_CORE_CONSOLE.Fixes: d1a1af2cdf19 ("hvc: dcc: Add earlycon support")Reported-by: Hulk Robot Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20200919063535.2809707-1-yangyingliang@huawei.comSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

f9d89c94 - tty: riscv: Using RISCV_SBI_V01 instead of RISCV_SBI

Fri, 17 Apr 2020 12:12:21 +0000

tty: riscv: Using RISCV_SBI_V01 instead of RISCV_SBIAs shown in SBI v0.2, the legacy console SBI functions (sbi_console_getchar()and sbi_console_putchar()) are expected to be deprecated; they have no replacement.Let's HVC_RISCV_SBI and SERIAL_EARLYCON_RISCV_SBI depends on RISCV_SBI_V01.Fixes: efca13989250 ("RISC-V: Introduce a new config for SBI v0.1")Signed-off-by: Kefeng Wang Reviewed-by: Anup Patel Signed-off-by: Palmer Dabbelt List of files: /linux-6.15/drivers/tty/hvc/Kconfig

00e37543 - tty: source all tty Kconfig files in one place

Wed, 11 Mar 2020 22:57:35 +0000

tty: source all tty Kconfig files in one place'source' (include) all of the tty/*/Kconfig files fromdrivers/tty/Kconfig instead of from drivers/char/Kconfig.This consolidates them both in source code and in menupresentation to the user.Move hvc/Kconfig and serial/Kconfig 'source' lines into theif TTY/endif block and remove the if TTY/endif blocks fromthose 2 files.Cc: linux-serial@vger.kernel.orgCc: Jiri Slaby Cc: Greg Kroah-Hartman Cc: Arnd Bergmann Suggested-by: Jiri Slaby Suggested-by: Arnd Bergmann Acked-by: Arnd Bergmann Signed-off-by: Randy Dunlap Link: https://lore.kernel.org/r/20200311225736.32147-3-rdunlap@infradead.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

da88ac0b - tty: Fix Kconfig indentation, continued

Thu, 21 Nov 2019 13:28:47 +0000

tty: Fix Kconfig indentation, continuedAdjust indentation from seven spaces to tab (+optional two spaces) as incoding style with command like: $ sed -e 's/^ /\t/' -i */KconfigSigned-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20191121132847.29015-1-krzk@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

4500914d - tty: Fix Kconfig indentation

Wed, 20 Nov 2019 13:38:43 +0000

tty: Fix Kconfig indentationAdjust indentation from spaces to tab (+optional two spaces) as incoding style with command like: $ sed -e 's/^ /\t/' -i */KconfigSigned-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20191120133843.13189-1-krzk@kernel.orgSigned-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

eded8bc6 - riscv: don't allow selecting SBI based drivers for M-mode

Mon, 28 Oct 2019 12:10:33 +0000

riscv: don't allow selecting SBI based drivers for M-modeWhen running in M-mode we can't use SBI based drivers. Add a newCONFIG_RISCV_SBI that drivers that do SBI calls can depend oninstead.Signed-off-by: Damien Le Moal Reviewed-by: Anup Patel Signed-off-by: Christoph Hellwig Signed-off-by: Paul Walmsley List of files: /linux-6.15/drivers/tty/hvc/Kconfig

f692f776 - tty: remove redundant 'default n' from Kconfig-s

Fri, 12 Apr 2019 10:17:39 +0000

tty: remove redundant 'default n' from Kconfig-s'default n' is the default value for any bool or tristate Kconfigsetting so there is no need to write it explicitly.Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOOis not set' for visible symbols") the Kconfig behavior is the sameregardless of 'default n' being present or not: ... One side effect of (and the main motivation for) this change is making the following two definitions behave exactly the same: config FOO bool config FOO bool default n With this change, neither of these will generate a '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied). That might make it clearer to people that a bare 'default n' is redundant. ...Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

38c91d1d - tty: add SPDX identifiers to Kconfig and Makefiles

Tue, 02 Apr 2019 14:07:07 +0000

tty: add SPDX identifiers to Kconfig and MakefilesThere were a few Kconfig and Makefiles under drivers/tty/ that weremissing a SPDX identifier. Fix that up so that automated tools canproperly classify all kernel source files.Cc: Jiri Slaby Cc: Jiri Kosina Cc: Rob Herring Acked-by: David Sterba Reviewed-by: Mukesh Ojha Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

e6bf3cc5 - tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers

Fri, 09 Mar 2018 16:16:06 +0000

tty: remove bfin_jtag_comm and hvc_bfin_jtag driversThe blackfin architecture is getting removed, so these driversare not needed any more.Acked-by: Greg Kroah-Hartman Acked-by: Aaron Wu Signed-off-by: Arnd Bergmann List of files: /linux-6.15/drivers/tty/hvc/Kconfig

afa6b1cc - tty: New RISC-V SBI console driver

Thu, 08 Mar 2018 22:27:34 +0000

tty: New RISC-V SBI console driverThe RISC-V ISA defines a simple console that is availiable via SBI callson all systems. The SBI console is designed to be availiable at alltimes, so while it's most natural to use this as an early printk targetit's also possible to use this as the system console when there isn't abetter one availiable.This patch adds support for the RISC-V SBI console via the HVCinfastructure. It's entirely independent from our early printk support,which results in early boot messages appearing twice over the SBIconsole. As far as I can tell that's the fault of our early printksupport (we should support earlycon) as opposed to this driver.There is one checkpatch.pl warning here: to check the MAINTAINERS file.They're all matched by the "K: riscv" line.Signed-off-by: Palmer Dabbelt Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

ecda85e7 - x86/lguest: Remove lguest support

Wed, 16 Aug 2017 17:31:57 +0000

x86/lguest: Remove lguest supportLguest seems to be rather unused these days. It has seen only patchesensuring it still builds the last two years and its official state is"Odd Fixes".Remove it in order to be able to clean up the paravirt code.Signed-off-by: Juergen Gross Acked-by: Rusty Russell Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Cc: boris.ostrovsky@oracle.comCc: lguest@lists.ozlabs.orgCc: rusty@rustcorp.com.auCc: xen-devel@lists.xenproject.orgLink: http://lkml.kernel.org/r/20170816173157.8633-3-jgross@suse.comSigned-off-by: Ingo Molnar List of files: /linux-6.15/drivers/tty/hvc/Kconfig

20d58cb6 - s390/hvc_iucv: fix broken Kconfig select statement

Mon, 08 May 2017 06:03:32 +0000

s390/hvc_iucv: fix broken Kconfig select statementSelect statements in Kconfig do not necessarily enable all requireddependencies and can lead to broken configs. This is also the casefor the "select IUCV" statement within HVC_IUCV:warning: (HVC_IUCV) selects IUCV which has unmet direct dependencies (NET && S390)Just add the missing "depends on NET" to avoid broken configs.Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky List of files: /linux-6.15/drivers/tty/hvc/Kconfig

4cad4c57 - ARM64: TTY: hvc_dcc: Add support for ARM64 dcc

Sat, 12 Sep 2015 17:44:39 +0000

ARM64: TTY: hvc_dcc: Add support for ARM64 dccAdd support for debug communications channel basedhvc console for arm64 cpus.Signed-off-by: Abhimanyu Kapur Signed-off-by: Timur Tabi Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

80463501 - tty/hvc: remove celleb-only beat driver

Tue, 14 Apr 2015 05:28:46 +0000

tty/hvc: remove celleb-only beat driverThe beat hvc driver is only used by celleb.celleb has been dropped [1], so drop the drivers.[1] http://patchwork.ozlabs.org/patch/451730/CC: Greg Kroah-Hartman CC: Jiri Slaby CC: Valentin Rothberg CC: mpe@ellerman.id.auCC: linuxppc-dev@lists.ozlabs.orgSigned-off-by: Daniel Axtens Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

4f73bc4d - tty: Added a CONFIG_TTY option to allow removal of TTY

Fri, 18 Jan 2013 06:44:22 +0000

tty: Added a CONFIG_TTY option to allow removal of TTYThe option allows you to remove TTY and compile without errors. Thissaves space on systems that won't support TTY interfaces anyway.bloat-o-meter output is below.The bulk of this patch consists of Kconfig changes adding "depends onTTY" to various serial devices and similar drivers that require the TTYlayer. Ideally, these dependencies would occur on a common intermediatesymbol such as SERIO, but most drivers "select SERIO" rather than"depends on SERIO", and "select" does not respect dependencies.bloat-o-meter output comparing our previous minimal to new minimal byremoving TTY. The list is filtered to not show removed entries with awk'$3 != "-"' as the list was very long.add/remove: 0/226 grow/shrink: 2/14 up/down: 6/-35356 (-35350)function old new deltachr_dev_init 166 170 +4allow_signal 80 82 +2static.__warned 143 142 -1disallow_signal 63 62 -1__set_special_pids 95 94 -1unregister_console 126 121 -5start_kernel 546 541 -5register_console 593 588 -5copy_from_user 45 40 -5sys_setsid 128 120 -8sys_vhangup 32 19 -13do_exit 1543 1526 -17bitmap_zero 60 40 -20arch_local_irq_save 137 117 -20release_task 674 652 -22static.spin_unlock_irqrestore 308 260 -48Signed-off-by: Joe Millenbach Reviewed-by: Jamey Sharp Reviewed-by: Josh Triplett Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

8b77562b - tty/serial: remove CONFIG_EXPERIMENTAL dependencies

Tue, 18 Sep 2012 15:19:27 +0000

tty/serial: remove CONFIG_EXPERIMENTAL dependenciesAs discussed at the kernel summit this year, CONFIG_EXPERIMENTAL meansnothing, so let's get rid of it.Cc: Kees Cook Cc: Alan Cox Cc: Benjamin Herrenschmidt Cc: Stefano Stabellini Cc: Stephen Rothwell Cc: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/drivers/tty/hvc/Kconfig

7d3d897a - powerpc/hvc_udbg: Don't crash when udbg_putc is NULL

Wed, 14 Mar 2012 07:37:04 +0000

powerpc/hvc_udbg: Don't crash when udbg_putc is NULLAlso while at it, add some help text indicating why you shouldn'tenable that driver under normal circumstancesSigned-off-by: Benjamin Herrenschmidt List of files: /linux-6.15/drivers/tty/hvc/Kconfig