Commit 99bb1bd8 authored by Mateusz Jończyk's avatar Mateusz Jończyk Committed by Ingo Molnar
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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: 9232c49f ("x86/Kconfig: Enable X86_X2APIC by default and improve help text")
Signed-off-by: default avatarMateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250322154541.40325-1-mat.jonczyk@o2.pl
parent 2487b6b9

arch/x86/Kconfig

+7 −6
Original line number Diff line number Diff line
@@ -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"