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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-11 23:03:29 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-16 11:24:05 +0100 |
| commit | a24ca9976843156eabbc5f2d798954b5674d1b61 (patch) | |
| tree | c1388bd5a00df2d9be5ca8efd602984a9dfbb6e8 /arch/x86/Kconfig | |
| parent | c8137ace56383688af911fea5934c71ad158135e (diff) | |
| download | linux-a24ca9976843156eabbc5f2d798954b5674d1b61.tar.bz2 | |
x86/iopl: Remove legacy IOPL option
The IOPL emulation via the I/O bitmap is sufficient. Remove the legacy
cruft dealing with the (e)flags based IOPL mechanism.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com> (Paravirt and Xen parts)
Acked-by: Andy Lutomirski <luto@kernel.org>
Diffstat (limited to 'arch/x86/Kconfig')
| -rw-r--r-- | arch/x86/Kconfig | 23 |
1 files changed, 3 insertions, 20 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 2aad1cd14cc5..1f926e396ec1 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1254,12 +1254,9 @@ config X86_VSYSCALL_EMULATION Disabling this option saves about 7K of kernel size and possibly 4K of additional runtime pagetable memory. -choice - prompt "IOPL" - default X86_IOPL_EMULATION - config X86_IOPL_EMULATION bool "IOPL Emulation" + default y ---help--- Legacy IOPL support is an overbroad mechanism which allows user space aside of accessing all 65536 I/O ports also to disable @@ -1269,22 +1266,8 @@ config X86_IOPL_EMULATION The emulation restricts the functionality of the syscall to only allowing the full range I/O port access, but prevents the - ability to disable interrupts from user space. - -config X86_IOPL_LEGACY - bool "IOPL Legacy" - ---help--- - Allow the full IOPL permissions, i.e. user space access to all - 65536 I/O ports and also the ability to disable interrupts, which - is overbroad and can result in system lockups. - -config X86_IOPL_NONE - bool "IOPL None" - ---help--- - Disable the IOPL permission syscall. That's the safest option as - no sane application should depend on this functionality. - -endchoice + ability to disable interrupts from user space which would be + granted if the hardware IOPL mechanism would be used. config TOSHIBA tristate "Toshiba Laptop support" |