[PATCH 11/14] powerpc: Add wrappers to enable/disable relocation on exceptions
From: Michael Neuling <hidden>
Date: 2012-11-09 06:19:10
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: Ian Munsie <redacted> 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 <redacted> Signed-off-by: Michael Neuling <redacted> --- 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