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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-12 01:03:29 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-16 13:24:05 +0300 |
| commit | a24ca9976843156eabbc5f2d798954b5674d1b61 (patch) | |
| tree | c1388bd5a00df2d9be5ca8efd602984a9dfbb6e8 /arch/x86/kernel/process_32.c | |
| parent | c8137ace56383688af911fea5934c71ad158135e (diff) | |
| download | linux-a24ca9976843156eabbc5f2d798954b5674d1b61.tar.xz | |
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/kernel/process_32.c')
| -rw-r--r-- | arch/x86/kernel/process_32.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 6c7d90527156..323499f48858 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -187,15 +187,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) */ load_TLS(next, cpu); - /* - * Restore IOPL if needed. In normal use, the flags restore - * in the switch assembly will handle this. But if the kernel - * is running virtualized at a non-zero CPL, the popf will - * not restore flags, so it must be done in a separate step. - */ - if (get_kernel_rpl() && unlikely(prev->iopl != next->iopl)) - set_iopl_mask(next->iopl); - switch_to_extra(prev_p, next_p); /* |