diff options
Diffstat (limited to 'arch/x86/kernel/cpu/common.c')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 16 |
1 files changed, 3 insertions, 13 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 9315a1660668..660d0b22e962 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1534,19 +1534,8 @@ EXPORT_PER_CPU_SYMBOL(__preempt_count); /* May not be marked __init: used by software suspend */ void syscall_init(void) { - extern char _entry_trampoline[]; - extern char entry_SYSCALL_64_trampoline[]; - - int cpu = smp_processor_id(); - unsigned long SYSCALL64_entry_trampoline = - (unsigned long)get_cpu_entry_area(cpu)->entry_trampoline + - (entry_SYSCALL_64_trampoline - _entry_trampoline); - wrmsr(MSR_STAR, 0, (__USER32_CS << 16) | __KERNEL_CS); - if (static_cpu_has(X86_FEATURE_PTI)) - wrmsrl(MSR_LSTAR, SYSCALL64_entry_trampoline); - else - wrmsrl(MSR_LSTAR, (unsigned long)entry_SYSCALL_64); + wrmsrl(MSR_LSTAR, (unsigned long)entry_SYSCALL_64); #ifdef CONFIG_IA32_EMULATION wrmsrl(MSR_CSTAR, (unsigned long)entry_SYSCALL_compat); @@ -1557,7 +1546,8 @@ void syscall_init(void) * AMD doesn't allow SYSENTER in long mode (either 32- or 64-bit). */ wrmsrl_safe(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS); - wrmsrl_safe(MSR_IA32_SYSENTER_ESP, (unsigned long)(cpu_entry_stack(cpu) + 1)); + wrmsrl_safe(MSR_IA32_SYSENTER_ESP, + (unsigned long)(cpu_entry_stack(smp_processor_id()) + 1)); wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)entry_SYSENTER_compat); #else wrmsrl(MSR_CSTAR, (unsigned long)ignore_sysret); |