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This is not desirable for debug and info logs, so >>>>>>>>>> lower the default efi log level to exclude them. >>>>>>>>>> >>>>>>>>>> Suggested-by: Ard Biesheuvel >>>>>>>>>> Signed-off-by: Aaron Kling >>>>>>>>>> --- >>>>>>>>>> drivers/firmware/efi/libstub/printk.c | 4 ++-- >>>>>>>>>> 1 file changed, 2 insertions(+), 2 deletions(-) >>>>>>>>>> >>>>>>>>>> diff --git a/drivers/firmware/efi/libstub/printk.c b/drivers/firmware/efi/libstub/printk.c >>>>>>>>>> index 3a67a2cea7bdf1aa215d48dbf9ece4ceec6e4c28..bc599212c05dd746a9c54abbbe61a4bf70f1a8c4 100644 >>>>>>>>>> --- a/drivers/firmware/efi/libstub/printk.c >>>>>>>>>> +++ b/drivers/firmware/efi/libstub/printk.c >>>>>>>>>> @@ -5,13 +5,13 @@ >>>>>>>>>> #include >>>>>>>>>> #include >>>>>>>>>> #include >>>>>>>>>> -#include /* For CONSOLE_LOGLEVEL_* */ >>>>>>>>>> +#include >>>>>>>>>> #include >>>>>>>>>> #include >>>>>>>>>> >>>>>>>>>> #include "efistub.h" >>>>>>>>>> >>>>>>>>>> -int efi_loglevel = CONSOLE_LOGLEVEL_DEFAULT; >>>>>>>>>> +int efi_loglevel = LOGLEVEL_NOTICE; >>>>>>>>>> >>>>>>>>>> /** >>>>>>>>>> * efi_char16_puts() - Write a UCS-2 encoded string to the console >>>>>>>>>> >>>>>>>>>> --- >>>>>>>>>> base-commit: d7b8f8e20813f0179d8ef519541a3527e7661d3a >>>>>>>>>> change-id: 20250708-efi-default-loglevel-4da5a36cac87 >>>>>>>>>> >>>>>>>>>> Best regards, >>>>>>>>>> -- >>>>>>>>>> Aaron Kling >>>>>>>>> >>>>>>>>> This patch was originally suggested a few months ago [0], but as far >>>>>>>>> as I can tell was never queued for merge. Since I'm also hitting a >>>>>>>>> case where this is relevant, I'm sending this in to bring attention >>>>>>>>> back to it. >>>>>>>>> >>>>>>>> >>>>>>>> I've queued this up now - thanks. >>>>>>>> >>>>>>> >>>>>>> And how can I get back the loglevel info? It seems I can only choose >>>>>>> between notice, silent and debug now. And the latter two only by also >>>>>>> touching the kernel's loglevel. >>>>>>> >>>>>>> I'm particularly missing [1] in my UART logs now which is helpful in >>>>>>> understanding this essential system state. >>>>>>> >>>>>> >>>>>> Hi Jan, >>>>>> >>>>>> Is efi=debug too noisy for you? >>>>> >>>>> Yes, also because it affects the kernel even more. I'm looking for >>>>> "efi=info". >>>>> >>>>> I don't get the reason behind this change anymore as well. If you have a >>>>> splash screen shown, weren't you booting with "quiet" before already, >>>>> thus also without any stub messages? >>>>> >>>> >>>> Yeah, good point. IIRC that came up in the discussion but I can't >>>> remember the motivation so it can't have been very convincing. >>>> >>>> So should we just revert this change? >>> >>> I'd prefer not to have to set quiet to get a clean splash screen. That >>> doesn't seem like an unreasonable expectation, getting default >>> non-debug logs and not having stuff written on top of the splash >>> image. >> >> Perhaps you could remind us why this only applies to the efistub >> output, and having the output of the kernel itself corrupting the >> splash screen is fine? > > I'm not greatly knowledgeable about the efi standard and what's > happening under the hood, so I will just speak to what I saw in my use > case. I'm working on Nvidia Tegra devices, newer generations of which > use EDK2 as the last stage bootloader. The target os is Android, which > has a pretty strictly controlled defconfig. Prior to this change, the > kernel efistub logs were getting passed to the efi impl, which was > then printing those lines to the display. The kernel logs were not > being printed to the screen, as none of the console drivers were > enabled to do so. So after this change, regardless of the kernel log > level, the boot splash will remain untouched until the kernel display > driver takes over the display and the os renders to it. Because no > efistub log lines are being printed. > That makes sense now, and surely don't mind having some build-time or runtime configuration switch that allow to tune the system into such settings. It's just not so nice to take away the freedom of full-scale loglevel control from the efistub. Jan -- Siemens AG, Foundational Technologies Linux Expert Center