[Xen-changelog] [xen master] xen/arm: Introduce a helper to check local abort is enabled

[patchbot@xxxxxxx]

commit 1656edde42d556d2457fb5a452c8e81a01328c0b
Author:     Wei Chen <Wei.Chen@xxxxxxx>
AuthorDate: Wed Apr 5 17:09:17 2017 +0800
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Wed Apr 5 12:13:05 2017 -0700

    xen/arm: Introduce a helper to check local abort is enabled
    
    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@xxxxxxx>
    Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/include/asm-arm/system.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h
index 2eb96e8..b94e56f 100644
--- a/xen/include/asm-arm/system.h
+++ b/xen/include/asm-arm/system.h
@@ -51,6 +51,13 @@
 # error "unknown ARM variant"
 #endif
 
+static inline int local_abort_is_enabled(void)
+{
+    unsigned long flags;
+    local_save_flags(flags);
+    return !(flags & PSR_ABT_MASK);
+}
+
 #define arch_fetch_and_add(x, v) __sync_fetch_and_add(x, v)
 
 extern struct vcpu *__context_switch(struct vcpu *prev, struct vcpu *next);
--
generated by git-patchbot for /home/xen/git/xen.git#master

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