[PATCH v3 15/19] xen/arm: Introduce a helper to check local abort is enabled

[Wei Chen <Wei.Chen@arm.com>]

In previous patch, we have umasked the Abort/SError bit for Xen
in most of its running time. So in some use-cases, we have to
check whether the abort is enabled in current context. For example,
while we want to synchronize SErrors, we have to confirm the abort
is enabled. Otherwise synchronize SErrors is pointless.

Signed-off-by: Wei Chen <Wei.Chen@arm.com>
---
 xen/include/asm-arm/arm32/system.h | 7 +++++++
 xen/include/asm-arm/arm64/system.h | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/xen/include/asm-arm/arm32/system.h b/xen/include/asm-arm/arm32/system.h
index c617b40..6c5b9f5 100644
--- a/xen/include/asm-arm/arm32/system.h
+++ b/xen/include/asm-arm/arm32/system.h
@@ -35,6 +35,13 @@ static inline int local_irq_is_enabled(void)
     return !(flags & PSR_IRQ_MASK);
 }
 
+static inline int local_abort_is_enabled(void)
+{
+    unsigned long flags;
+    local_save_flags(flags);
+    return !(flags & PSR_ABT_MASK);
+}
+
 #define local_fiq_enable()  __asm__("cpsie f   @ __stf\n" : : : "memory", "cc")
 #define local_fiq_disable() __asm__("cpsid f   @ __clf\n" : : : "memory", "cc")
 
diff --git a/xen/include/asm-arm/arm64/system.h b/xen/include/asm-arm/arm64/system.h
index 2e2ee21..309485f 100644
--- a/xen/include/asm-arm/arm64/system.h
+++ b/xen/include/asm-arm/arm64/system.h
@@ -58,6 +58,13 @@ static inline int local_fiq_is_enabled(void)
     return !(flags & PSR_FIQ_MASK);
 }
 
+static inline int local_abort_is_enabled(void)
+{
+    unsigned long flags;
+    local_save_flags(flags);
+    return !(flags & PSR_ABT_MASK);
+}
+
 #endif
 /*
  * Local variables:
-- 
2.7.4


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