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Diffstat (limited to 'include/asm-x86/irqflags.h')
-rw-r--r--include/asm-x86/irqflags.h41
1 files changed, 26 insertions, 15 deletions
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h
index c242527f970e..17e7a1701c97 100644
--- a/include/asm-x86/irqflags.h
+++ b/include/asm-x86/irqflags.h
@@ -111,14 +111,35 @@ static inline unsigned long __raw_local_irq_save(void)
111#define DISABLE_INTERRUPTS(x) cli 111#define DISABLE_INTERRUPTS(x) cli
112 112
113#ifdef CONFIG_X86_64 113#ifdef CONFIG_X86_64
114#define SWAPGS swapgs
115/*
116 * Currently paravirt can't handle swapgs nicely when we
117 * don't have a stack we can rely on (such as a user space
118 * stack). So we either find a way around these or just fault
119 * and emulate if a guest tries to call swapgs directly.
120 *
121 * Either way, this is a good way to document that we don't
122 * have a reliable stack. x86_64 only.
123 */
124#define SWAPGS_UNSAFE_STACK swapgs
125
126#define PARAVIRT_ADJUST_EXCEPTION_FRAME /* */
127
114#define INTERRUPT_RETURN iretq 128#define INTERRUPT_RETURN iretq
115#define ENABLE_INTERRUPTS_SYSCALL_RET \ 129#define USERGS_SYSRET64 \
116 movq %gs:pda_oldrsp, %rsp; \ 130 swapgs; \
117 swapgs; \ 131 sysretq;
118 sysretq; 132#define USERGS_SYSRET32 \
133 swapgs; \
134 sysretl
135#define ENABLE_INTERRUPTS_SYSEXIT32 \
136 swapgs; \
137 sti; \
138 sysexit
139
119#else 140#else
120#define INTERRUPT_RETURN iret 141#define INTERRUPT_RETURN iret
121#define ENABLE_INTERRUPTS_SYSCALL_RET sti; sysexit 142#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
122#define GET_CR0_INTO_EAX movl %cr0, %eax 143#define GET_CR0_INTO_EAX movl %cr0, %eax
123#endif 144#endif
124 145
@@ -169,16 +190,6 @@ static inline void trace_hardirqs_fixup(void)
169#else 190#else
170 191
171#ifdef CONFIG_X86_64 192#ifdef CONFIG_X86_64
172/*
173 * Currently paravirt can't handle swapgs nicely when we
174 * don't have a stack we can rely on (such as a user space
175 * stack). So we either find a way around these or just fault
176 * and emulate if a guest tries to call swapgs directly.
177 *
178 * Either way, this is a good way to document that we don't
179 * have a reliable stack. x86_64 only.
180 */
181#define SWAPGS_UNSAFE_STACK swapgs
182#define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk 193#define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk
183#define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk 194#define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk
184#define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk 195#define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk