diff options
| author | Mateusz Jończyk <mat.jonczyk@o2.pl> | 2025-03-21 21:48:47 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-22 08:08:20 +0100 |
| commit | 21d8fb8d4e7071b2e60bc48c217ff1b4ce8cb855 (patch) | |
| tree | fc6eb454118122bb48e8777c11c6e47d04506a42 /arch/x86/Kconfig | |
| parent | 4047e8773fb627df3779291d9138e425537573af (diff) | |
x86/Kconfig: Document CONFIG_PCI_MMCONFIG
This configuration option had no help text, so add it.
CONFIG_EXPERT is enabled on some distribution kernels, so people using a
distribution kernel's configuration as a starting point will see this
option.
[ mingo: Standardized the new Kconfig text a bit. ]
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Signed-off-by: David Heideberg <david@ixit.cz>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250321-x86_x2apic-v3-5-b0cbaa6fa338@ixit.cz
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 917cd2f839f5..a079ecf15c71 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2902,6 +2902,19 @@ config PCI_MMCONFIG default y depends on PCI && (ACPI || JAILHOUSE_GUEST) depends on X86_64 || (PCI_GOANY || PCI_GOMMCONFIG) + help + Add support for accessing the PCI configuration space as a memory + mapped area. It is the recommended method if the system supports + this (it must have PCI Express and ACPI for it to be available). + + In the unlikely case that enabling this configuration option causes + problems, the mechanism can be switched off with the 'pci=nommconf' + command line parameter. + + Say N only if you are sure that your platform does not support this + access method or you have problems caused by it. + + Say Y otherwise. config PCI_OLPC def_bool y |