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-rw-r--r--drivers/lguest/interrupts_and_traps.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c
index 28433a155d67..70dfcdc29f1f 100644
--- a/drivers/lguest/interrupts_and_traps.c
+++ b/drivers/lguest/interrupts_and_traps.c
@@ -140,6 +140,16 @@ static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi,
cpu->regs->eip = idt_address(lo, hi);
/*
+ * Trapping always clears these flags:
+ * TF: Trap flag
+ * VM: Virtual 8086 mode
+ * RF: Resume
+ * NT: Nested task.
+ */
+ cpu->regs->eflags &=
+ ~(X86_EFLAGS_TF|X86_EFLAGS_VM|X86_EFLAGS_RF|X86_EFLAGS_NT);
+
+ /*
* There are two kinds of interrupt handlers: 0xE is an "interrupt
* gate" which expects interrupts to be disabled on entry.
*/