From: Ian Munsie <imun...@au1.ibm.com>
These wrappers hide the parameters that have to be passed to H_SET_MODE
to enable/disable relocation on during exceptions.
As noted in the comments, since these have partition wide scope, they
may take some time to complete and must be periodically retried until
H_SUCCESS is returned.
Signed-off-by: Ian Munsie <imun...@au1.ibm.com>
Signed-off-by: Michael Neuling <mi...@neuling.org>
---
arch/powerpc/platforms/pseries/plpar_wrappers.h | 25 +++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/plpar_wrappers.h
b/arch/powerpc/platforms/pseries/plpar_wrappers.h
index 44ad214..e6cc34a 100644
--- a/arch/powerpc/platforms/pseries/plpar_wrappers.h
+++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h
@@ -279,4 +279,29 @@ static inline long plpar_set_mode(unsigned long mflags,
unsigned long resource,
{
return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
}
+
+/*
+ * Enable relocation on exceptions on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long enable_reloc_on_exceptions(void)
+{
+ /* mflags = 3: Exceptions at 0xC000000000004000 */
+ return plpar_set_mode(3, 3, 0, 0);
+}
+
+/*
+ * Disable relocation on exceptions on this partition
+ *
+ * Note: this call has a partition wide scope and can take a while to complete.
+ * If it returns H_LONG_BUSY_* it should be retried periodically until it
+ * returns H_SUCCESS.
+ */
+static inline long disable_reloc_on_exceptions(void) {
+ return plpar_set_mode(0, 3, 0, 0);
+}
+
#endif /* _PSERIES_PLPAR_WRAPPERS_H */
--
1.7.9.5
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