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Commit 798042da authored by Ian Munsie's avatar Ian Munsie Committed by Benjamin Herrenschmidt
Browse files

powerpc: Add wrappers to enable/disable relocation on exceptions 



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: default avatarIan Munsie <imunsie@au1.ibm.com>
Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent d8f48ecc

arch/powerpc/platforms/pseries/plpar_wrappers.h

+25 −0
Original line number Diff line number Diff line
@@ -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 */