[PATCH 3/3] x86: Switch critical exceptions and NMI to irqstack

[Avi Kivity]

With the special exception stacks gone, the irqstack is a much safer place
than the regular task stacks.

Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
 arch/x86/kernel/entry_64.S |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 245fecd..8f40593 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -917,7 +917,10 @@ END(spurious_interrupt)
 	movq %rsp,%rdi
 	movq ORIG_RAX(%rsp),%rsi
 	movq $-1,ORIG_RAX(%rsp)
+	mov %rsp, %rbp
+	enter_irqstack %rax
 	call \sym
+	mov %rbp, %rsp
 	DISABLE_INTERRUPTS(CLBR_NONE)
 	.if \irqtrace
 	TRACE_IRQS_OFF
-- 
1.6.0.6

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