Gh0st
/
linux
mirror of https://github.com/torvalds/linux.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

x86/Kconfig: Correct X86_X2APIC help text 

Currently, it is not true that the kernel will panic with CONFIG_X86_X2APIC=n
on systems that require it; it will try to disable the APIC and run without
it to at least give the user a clear warning message. See the second
variant of check_x2apic() in arch/x86/kernel/apic/apic.c .

Also massage some other parts of the help text.

Fixes: 9232c49ff3 ("x86/Kconfig: Enable X86_X2APIC by default and improve help text")
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250322154541.40325-1-mat.jonczyk@o2.pl
This commit is contained in:
Mateusz Jończyk 2025-03-22 16:45:41 +01:00 committed by Ingo Molnar
parent 2487b6b9bf
commit 99bb1bd810
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
arch/x86/Kconfig
View File

@ -471,14 +471,15 @@ config X86_X2APIC
in 2019, but it can be disabled by the BIOS. It is also frequently
emulated in virtual machines, even when the host CPU does not support
it. Support in the CPU can be checked by executing
cat /proc/cpuinfo | grep x2apic
grep x2apic /proc/cpuinfo
If this configuration option is disabled, the kernel will not boot on
some platforms that have x2APIC enabled.
If this configuration option is disabled, the kernel will boot with
very reduced functionality and performance on some platforms that
have x2APIC enabled. On the other hand, on hardware that does not
support x2APIC, a kernel with this option enabled will just fallback
to older APIC implementations.
Say N if you know that your platform does not have x2APIC.
Otherwise, say Y.
If in doubt, say Y.
config X86_POSTED_MSI
bool "Enable MSI and MSI-x delivery by posted interrupts"