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Diffstat (limited to 'arch/i386/kernel/sysenter.c')
-rw-r--r--arch/i386/kernel/sysenter.c67
1 files changed, 0 insertions, 67 deletions
diff --git a/arch/i386/kernel/sysenter.c b/arch/i386/kernel/sysenter.c
deleted file mode 100644
index 0bada1870bd..00000000000
--- a/arch/i386/kernel/sysenter.c
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- * linux/arch/i386/kernel/sysenter.c
- *
- * (C) Copyright 2002 Linus Torvalds
- *
- * This file contains the needed initializations to support sysenter.
- */
-
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/thread_info.h>
-#include <linux/sched.h>
-#include <linux/gfp.h>
-#include <linux/string.h>
-#include <linux/elf.h>
-
-#include <asm/cpufeature.h>
-#include <asm/msr.h>
-#include <asm/pgtable.h>
-#include <asm/unistd.h>
-
-extern asmlinkage void sysenter_entry(void);
-
-void enable_sep_cpu(void)
-{
- int cpu = get_cpu();
- struct tss_struct *tss = &per_cpu(init_tss, cpu);
-
- if (!boot_cpu_has(X86_FEATURE_SEP)) {
- put_cpu();
- return;
- }
-
- tss->ss1 = __KERNEL_CS;
- tss->esp1 = sizeof(struct tss_struct) + (unsigned long) tss;
- wrmsr(MSR_IA32_SYSENTER_CS, __KERNEL_CS, 0);
- wrmsr(MSR_IA32_SYSENTER_ESP, tss->esp1, 0);
- wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long) sysenter_entry, 0);
- put_cpu();
-}
-
-/*
- * These symbols are defined by vsyscall.o to mark the bounds
- * of the ELF DSO images included therein.
- */
-extern const char vsyscall_int80_start, vsyscall_int80_end;
-extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
-
-int __init sysenter_setup(void)
-{
- void *page = (void *)get_zeroed_page(GFP_ATOMIC);
-
- __set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
-
- if (!boot_cpu_has(X86_FEATURE_SEP)) {
- memcpy(page,
- &vsyscall_int80_start,
- &vsyscall_int80_end - &vsyscall_int80_start);
- return 0;
- }
-
- memcpy(page,
- &vsyscall_sysenter_start,
- &vsyscall_sysenter_end - &vsyscall_sysenter_start);
-
- return 0;
-}