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xen: arm64: interrupt/abort mask/unmask
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Tim Deegan <tim@xen.org>
This commit is contained in:
Ian Campbell committed
1 parent
8b93c06fd2
commit
8c75419129
3 files changed
+98
-44
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@@ -133,6 +133,50 @@ static always_inline unsigned long __cmpxchg(
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((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o), \
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(unsigned long)(n),sizeof(*(ptr))))
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#define local_irq_disable() asm volatile ( "cpsid i @ local_irq_disable\n" : : : "cc" )
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#define local_irq_enable() asm volatile ( "cpsie i @ local_irq_enable\n" : : : "cc" )
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#define local_save_flags(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile ( "mrs %0, cpsr @ local_save_flags\n" \
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: "=r" (x) :: "memory", "cc" ); \
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})
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#define local_irq_save(x) \
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({ \
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local_save_flags(x); \
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local_irq_disable(); \
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})
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#define local_irq_restore(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile ( \
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"msr cpsr_c, %0 @ local_irq_restore\n" \
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: \
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: "r" (flags) \
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: "memory", "cc"); \
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})
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static inline int local_irq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !(flags & PSR_IRQ_MASK);
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}
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#define local_fiq_enable() __asm__("cpsie f @ __stf\n" : : : "memory", "cc")
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#define local_fiq_disable() __asm__("cpsid f @ __clf\n" : : : "memory", "cc")
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#define local_abort_enable() __asm__("cpsie a @ __sta\n" : : : "memory", "cc")
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#define local_abort_disable() __asm__("cpsid a @ __sta\n" : : : "memory", "cc")
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static inline int local_fiq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !(flags & PSR_FIQ_MASK);
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}
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#endif
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/*
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* Local variables:
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@@ -173,6 +173,60 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old,
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(unsigned long)(n), \
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sizeof(*(ptr))))
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/* Uses uimm4 as a bitmask to select the clearing of one or more of
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* the DAIF exception mask bits:
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* bit 3 selects the D mask,
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* bit 2 the A mask,
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* bit 1 the I mask and
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* bit 0 the F mask.
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*/
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#define local_fiq_disable() asm volatile ( "msr daifset, #1\n" ::: "memory" )
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#define local_fiq_enable() asm volatile ( "msr daifclr, #1\n" ::: "memory" )
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#define local_irq_disable() asm volatile ( "msr daifset, #2\n" ::: "memory" )
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#define local_irq_enable() asm volatile ( "msr daifclr, #2\n" ::: "memory" )
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#define local_abort_disable() asm volatile ( "msr daifset, #4\n" ::: "memory" )
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#define local_abort_enable() asm volatile ( "msr daifclr, #4\n" ::: "memory" )
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#define local_save_flags(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile( \
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"mrs %0, daif // local_save_flags\n" \
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: "=r" (x) \
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: \
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: "memory"); \
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})
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#define local_irq_save(x) \
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({ \
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local_save_flags(x); \
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local_irq_disable(); \
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})
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#define local_irq_restore(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile ( \
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"msr daif, %0 // local_irq_restore" \
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: \
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: "r" (flags) \
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: "memory"); \
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})
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static inline int local_irq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !(flags & PSR_IRQ_MASK);
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}
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static inline int local_fiq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !(flags & PSR_FIQ_MASK);
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}
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#endif
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/*
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* Local variables:
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@@ -29,50 +29,6 @@
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# error "unknown ARM variant"
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#endif
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#define local_irq_disable() asm volatile ( "cpsid i @ local_irq_disable\n" : : : "cc" )
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#define local_irq_enable() asm volatile ( "cpsie i @ local_irq_enable\n" : : : "cc" )
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#define local_save_flags(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile ( "mrs %0, cpsr @ local_save_flags\n" \
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: "=r" (x) :: "memory", "cc" ); \
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})
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#define local_irq_save(x) \
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({ \
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local_save_flags(x); \
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local_irq_disable(); \
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})
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#define local_irq_restore(x) \
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({ \
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BUILD_BUG_ON(sizeof(x) != sizeof(long)); \
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asm volatile ( \
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"msr cpsr_c, %0 @ local_irq_restore\n" \
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: \
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: "r" (flags) \
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: "memory", "cc"); \
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})
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static inline int local_irq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !(flags & PSR_IRQ_MASK);
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}
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#define local_fiq_enable() __asm__("cpsie f @ __stf\n" : : : "memory", "cc")
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#define local_fiq_disable() __asm__("cpsid f @ __clf\n" : : : "memory", "cc")
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#define local_abort_enable() __asm__("cpsie a @ __sta\n" : : : "memory", "cc")
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#define local_abort_disable() __asm__("cpsid a @ __sta\n" : : : "memory", "cc")
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static inline int local_fiq_is_enabled(void)
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{
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unsigned long flags;
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local_save_flags(flags);
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return !!(flags & PSR_FIQ_MASK);
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}
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extern struct vcpu *__context_switch(struct vcpu *prev, struct vcpu *next);
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#endif
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