x86_64/entry/xen: Do not invoke espfix64 on Xen

[pandora-kernel.git] / arch / x86 / kernel / entry_64.S

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 67fd181..4b511ef 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -861,33 +861,27 @@ restore_args:
        RESTORE_ARGS 1,8,1
 
 irq_return:
+       INTERRUPT_RETURN
+
+ENTRY(native_iret)
        /*
         * Are we returning to a stack segment from the LDT?  Note: in
         * 64-bit mode SS:RSP on the exception stack is always valid.
         */
 #ifdef CONFIG_X86_ESPFIX64
        testb $4,(SS-RIP)(%rsp)
-       jnz irq_return_ldt
+       jnz native_irq_return_ldt
 #endif
 
-irq_return_iret:
-       INTERRUPT_RETURN
-
-       .section __ex_table, "a"
-       .quad irq_return_iret, bad_iret
-       .previous
-
-#ifdef CONFIG_PARAVIRT
-ENTRY(native_iret)
+native_irq_return_iret:
        iretq
 
        .section __ex_table,"a"
-       .quad native_iret, bad_iret
+       .quad native_irq_return_iret, bad_iret
        .previous
-#endif
 
 #ifdef CONFIG_X86_ESPFIX64
-irq_return_ldt:
+native_irq_return_ldt:
        pushq_cfi %rax
        pushq_cfi %rdi
        SWAPGS
@@ -909,7 +903,7 @@ irq_return_ldt:
        SWAPGS
        movq %rax,%rsp
        popq_cfi %rax
-       jmp irq_return_iret
+       jmp native_irq_return_iret
 #endif
 
        .section .fixup,"ax"
@@ -995,13 +989,8 @@ __do_double_fault:
        cmpl $__KERNEL_CS,CS(%rdi)
        jne do_double_fault
        movq RIP(%rdi),%rax
-       cmpq $irq_return_iret,%rax
-#ifdef CONFIG_PARAVIRT
-       je 1f
-       cmpq $native_iret,%rax
-#endif
+       cmpq $native_irq_return_iret,%rax
        jne do_double_fault             /* This shouldn't happen... */
-1:
        movq PER_CPU_VAR(kernel_stack),%rax
        subq $(6*8-KERNEL_STACK_OFFSET),%rax    /* Reset to original stack */
        movq %rax,RSP(%rdi)
@@ -1511,7 +1500,7 @@ error_sti:
  */
 error_kernelspace:
        incl %ebx
-       leaq irq_return_iret(%rip),%rcx
+       leaq native_irq_return_iret(%rip),%rcx
        cmpq %rcx,RIP+8(%rsp)
        je error_swapgs
        movl %ecx,%eax  /* zero extend */