Merge tag 'dmaengine-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw...

[cascardo/linux.git] / arch / x86 / kernel / entry_64.S

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index b25ca96..2fac134 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -207,7 +207,6 @@ ENDPROC(native_usergs_sysret64)
  */
        .macro XCPT_FRAME start=1 offset=0
        INTR_FRAME \start, RIP+\offset-ORIG_RAX
-       /*CFI_REL_OFFSET orig_rax, ORIG_RAX-ORIG_RAX*/
        .endm
 
 /*
@@ -287,21 +286,21 @@ ENDPROC(native_usergs_sysret64)
 ENTRY(save_paranoid)
        XCPT_FRAME 1 RDI+8
        cld
-       movq_cfi rdi, RDI+8
-       movq_cfi rsi, RSI+8
+       movq %rdi, RDI+8(%rsp)
+       movq %rsi, RSI+8(%rsp)
        movq_cfi rdx, RDX+8
        movq_cfi rcx, RCX+8
        movq_cfi rax, RAX+8
-       movq_cfi r8, R8+8
-       movq_cfi r9, R9+8
-       movq_cfi r10, R10+8
-       movq_cfi r11, R11+8
+       movq %r8, R8+8(%rsp)
+       movq %r9, R9+8(%rsp)
+       movq %r10, R10+8(%rsp)
+       movq %r11, R11+8(%rsp)
        movq_cfi rbx, RBX+8
-       movq_cfi rbp, RBP+8
-       movq_cfi r12, R12+8
-       movq_cfi r13, R13+8
-       movq_cfi r14, R14+8
-       movq_cfi r15, R15+8
+       movq %rbp, RBP+8(%rsp)
+       movq %r12, R12+8(%rsp)
+       movq %r13, R13+8(%rsp)
+       movq %r14, R14+8(%rsp)
+       movq %r15, R15+8(%rsp)
        movl $1,%ebx
        movl $MSR_GS_BASE,%ecx
        rdmsr
@@ -830,27 +829,24 @@ 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
-       _ASM_EXTABLE(irq_return_iret, bad_iret)
-
-#ifdef CONFIG_PARAVIRT
-ENTRY(native_iret)
+native_irq_return_iret:
        iretq
-       _ASM_EXTABLE(native_iret, bad_iret)
-#endif
+       _ASM_EXTABLE(native_irq_return_iret, bad_iret)
 
 #ifdef CONFIG_X86_ESPFIX64
-irq_return_ldt:
+native_irq_return_ldt:
        pushq_cfi %rax
        pushq_cfi %rdi
        SWAPGS
@@ -872,7 +868,7 @@ irq_return_ldt:
        SWAPGS
        movq %rax,%rsp
        popq_cfi %rax
-       jmp irq_return_iret
+       jmp native_irq_return_iret
 #endif
 
        .section .fixup,"ax"
@@ -956,13 +952,8 @@ __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)
@@ -1395,21 +1386,21 @@ ENTRY(error_entry)
        CFI_ADJUST_CFA_OFFSET 15*8
        /* oldrax contains error code */
        cld
-       movq_cfi rdi, RDI+8
-       movq_cfi rsi, RSI+8
-       movq_cfi rdx, RDX+8
-       movq_cfi rcx, RCX+8
-       movq_cfi rax, RAX+8
-       movq_cfi  r8,  R8+8
-       movq_cfi  r9,  R9+8
-       movq_cfi r10, R10+8
-       movq_cfi r11, R11+8
+       movq %rdi, RDI+8(%rsp)
+       movq %rsi, RSI+8(%rsp)
+       movq %rdx, RDX+8(%rsp)
+       movq %rcx, RCX+8(%rsp)
+       movq %rax, RAX+8(%rsp)
+       movq  %r8,  R8+8(%rsp)
+       movq  %r9,  R9+8(%rsp)
+       movq %r10, R10+8(%rsp)
+       movq %r11, R11+8(%rsp)
        movq_cfi rbx, RBX+8
-       movq_cfi rbp, RBP+8
-       movq_cfi r12, R12+8
-       movq_cfi r13, R13+8
-       movq_cfi r14, R14+8
-       movq_cfi r15, R15+8
+       movq %rbp, RBP+8(%rsp)
+       movq %r12, R12+8(%rsp)
+       movq %r13, R13+8(%rsp)
+       movq %r14, R14+8(%rsp)
+       movq %r15, R15+8(%rsp)
        xorl %ebx,%ebx
        testl $3,CS+8(%rsp)
        je error_kernelspace
@@ -1427,8 +1418,9 @@ error_sti:
  * compat mode. Check for these here too.
  */
 error_kernelspace:
+       CFI_REL_OFFSET rcx, RCX+8
        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 */