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authorThomas Gleixner <tglx@linutronix.de>2019-11-12 01:03:29 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-11-16 13:24:05 +0300
commita24ca9976843156eabbc5f2d798954b5674d1b61 (patch)
treec1388bd5a00df2d9be5ca8efd602984a9dfbb6e8 /arch/x86/xen
parentc8137ace56383688af911fea5934c71ad158135e (diff)
downloadlinux-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/xen')
-rw-r--r--arch/x86/xen/enlighten_pv.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 5bfea374a160..ae4a41ca19f6 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -837,15 +837,6 @@ static void xen_load_sp0(unsigned long sp0)
this_cpu_write(cpu_tss_rw.x86_tss.sp0, sp0);
}
-void xen_set_iopl_mask(unsigned mask)
-{
- struct physdev_set_iopl set_iopl;
-
- /* Force the change at ring 0. */
- set_iopl.iopl = (mask == 0) ? 1 : (mask >> 12) & 3;
- HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
-}
-
static void xen_io_delay(void)
{
}
@@ -1055,7 +1046,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
.write_idt_entry = xen_write_idt_entry,
.load_sp0 = xen_load_sp0,
- .set_iopl_mask = xen_set_iopl_mask,
.io_delay = xen_io_delay,
/* Xen takes care of %gs when switching to usermode for us */