diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-11-01 01:18:49 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-11-01 09:47:55 +0300 |
| commit | af25ed59b5616b389d90877f7085dc5d457a3d49 (patch) | |
| tree | aef06c59b5b02eae1d6250bb4ad34466bf1615b5 /arch/x86/lguest | |
| parent | 0d50612c041f213fb6b98e3ff06e306a859c36f2 (diff) | |
| download | linux-af25ed59b5616b389d90877f7085dc5d457a3d49.tar.xz | |
x86/fpu: Remove clts()
The kernel doesn't use clts() any more. Remove it and all of its
paravirt infrastructure.
A careful reader may notice that xen_clts() appears to have been
buggy -- it didn't update xen_cr0_value.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm list <kvm@vger.kernel.org>
Link: http://lkml.kernel.org/r/3d3c8ca62f17579b9849a013d71e59a4d5d1b079.1477951965.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/lguest')
| -rw-r--r-- | arch/x86/lguest/boot.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index d74afcdbc580..4ca0d78adcf0 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -518,17 +518,6 @@ static unsigned long lguest_read_cr0(void) } /* - * Intel provided a special instruction to clear the TS bit for people too cool - * to use write_cr0() to do it. This "clts" instruction is faster, because all - * the vowels have been optimized out. - */ -static void lguest_clts(void) -{ - lazy_hcall1(LHCALL_TS, 0); - current_cr0 &= ~X86_CR0_TS; -} - -/* * cr2 is the virtual address of the last page fault, which the Guest only ever * reads. The Host kindly writes this into our "struct lguest_data", so we * just read it out of there. @@ -1429,7 +1418,6 @@ __init void lguest_init(void) pv_cpu_ops.load_tls = lguest_load_tls; pv_cpu_ops.get_debugreg = lguest_get_debugreg; pv_cpu_ops.set_debugreg = lguest_set_debugreg; - pv_cpu_ops.clts = lguest_clts; pv_cpu_ops.read_cr0 = lguest_read_cr0; pv_cpu_ops.write_cr0 = lguest_write_cr0; pv_cpu_ops.read_cr4 = lguest_read_cr4; |